10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(Mark One)

☒    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Fiscal Year Ended December 31, 2020

or

☐    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____ to _____

Commission file number 001-37848

KINSALE CAPITAL GROUP, INC.
(Exact name of registrant as specified in its charter)
Delaware	98-0664337
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

2035 Maywill Street, Suite 100
Richmond, Virginia 23230

(Address of principal executive offices, including zip code)

(804) 289-1300

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01	KNSL	Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes  ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company”  in Rule 12b-2 of the Securities Exchange Act of 1934.

Large Accelerated Filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

The aggregate market value of the shares of the registrant's common stock held by non-affiliates as of June 30, 2020 was approximately $3,241,859,629.

The number of the registrant’s common shares outstanding was 22,773,134 as of February 18, 2021.

DOCUMENTS INCORPORATED BY REFERENCE:

Portions of the registrant’s definitive proxy statement relating to its 2021 annual meeting of stockholders (the "2021 Proxy Statement") are incorporated by reference into Part III of this Annual Report on Form 10-K. The 2021 Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Table of Contents

		Page
PART I
Item 1.	Business	1
Item 1A.	Risk Factors	20
Item 1B.	Unresolved Staff Comments	34
Item 2.	Properties	34
Item 3.	Legal Proceedings	34
Item 4.	Mine Safety Disclosures	34
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	35
Item 6.	Selected Consolidated Financial and Other Data	37
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	40
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	63
Item 8.	Financial Statements and Supplementary Data	65
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	108
Item 9A.	Controls and Procedures	108
Item 9B.	Other Information	108
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	109
Item 11.	Executive Compensation	109
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	109
Item 13.	Certain Relationships and Related Transactions, and Director Independence	109
Item 14.	Principal Accounting Fees and Services	109
PART IV
Item 15.	Exhibits and Financial Statement Schedules	110
Item 16.	Form 10-K Summary	110

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Unless the context requires otherwise, the words "Kinsale," the "Company," "we," "us" and "our'" in this Annual Report on Form 10-K refer to Kinsale Capital Group, Inc. and its subsidiaries.

Forward-Looking Statements

This Annual Report on Form 10-K contains forward-looking statements, within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include any statement that does not directly relate to historical or current fact. These statements may discuss, among others, our future financial performance, our business prospects and strategy, our anticipated financial position, liquidity and capital, dividends and general market and industry conditions. You can identify forward-looking statements by words such as "anticipates," "estimates," "expects," "intends," "plans," "predicts," "projects," "believes," "seeks," "outlook," "future," "will," "would," "should," "could," "may," "can have" and similar terms. Forward-looking statements are based on management’s current expectations and assumptions about future events, which are subject to uncertainties, risks and changes in circumstances that are difficult to predict. These statements are only predictions and are not guarantees of future performance. Actual results may differ materially from those contemplated by a forward-looking statement. Factors that may cause such differences include, without limitation:

•the possibility that our loss reserves may be inadequate to cover our actual losses, which could have a material adverse effect on our financial condition, results of operations and cash flows;

•the inherent uncertainty of models resulting in actual losses that are materially different than our estimates;

•the failure of any of the loss limitations or exclusions we employ, or change in other claims or coverage issues, having a material adverse effect on our financial condition or results of operations;

•the inability to obtain reinsurance coverage at reasonable prices and on terms that adequately protect us;

•the possibility that severe weather conditions and other catastrophes may result in an increase in the number and amount of claims filed against us;

•adverse economic factors, including recession, inflation, periods of high unemployment or lower economic activity resulting in the sale of fewer policies than expected or an increase in frequency or severity of claims and premium defaults or both, affecting our growth and profitability;

•a decline in our financial strength rating adversely affecting the amount of business we write;

•the potential loss of one or more key executives or an inability to attract and retain qualified personnel adversely affecting our results of operations;

•our reliance on a select group of brokers;

•the changing market conditions of our excess and surplus lines ("E&S") insurance operations, as well as the cyclical nature of our business, affecting our financial performance;

•our employees taking excessive risks;

•the intense competition for business in our industry;

•the effects of litigation having an adverse effect on our business;

•the performance of our investment portfolio adversely affecting our financial results;

•the ability to pay dividends being dependent on our ability to obtain cash dividends or other permitted payments from our insurance subsidiary;

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•being forced to sell investments to meet our liquidity requirements;

•extensive regulation adversely affecting our ability to achieve our business objectives or the failure to comply with these regulations adversely affecting our financial condition and results of operations;

•the other risks and uncertainties discussed in Part I, Item 1A of this Annual Report on Form 10-K.

Forward-looking statements speak only as of the date on which they are made. Except as expressly required under federal securities laws or the rules and regulations of the Securities and Exchange Commission ("SEC"), we do not assume any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. You should not place undue reliance on forward-looking statements. All forward-looking statements attributable to us are expressly qualified by these cautionary statements.

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PART I

Item 1. Business

Kinsale is a property and casualty insurance company that focuses exclusively on the excess and surplus lines ("E&S") market in the U.S., where we can use our underwriting expertise to write coverages for hard-to-place small business risks and personal lines risks. We market and sell these insurance products in all 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands primarily through a network of independent insurance brokers. Our experienced and cohesive management team has an average of over 25 years of experience in the E&S market. Many of our employees and members of our management team have also worked together for decades at other E&S insurance companies.

Our goal is to deliver long-term value for our stockholders by growing our business and generating attractive returns. We seek to accomplish this by generating consistent and attractive underwriting profits while managing our capital prudently. Using our proprietary technology platform and leveraging the expertise of our highly experienced employees in our daily operations, we have built a company that is entrepreneurial and highly efficient. We believe our systems and technology are at the digital forefront of the insurance industry and allow us to quickly collect and analyze data, thereby improving our ability to manage our business and reduce our response times for our customers. We believe that we have differentiated ourselves from our competitors by effectively leveraging technology, vigilantly controlling expenses and maintaining control over our underwriting and claims operations.

We have significantly grown our business and have generated attractive returns. During 2020, our gross written premiums increased by 41.9%, to $552.8 million for the year ended December 31, 2020. Our return on equity and combined ratios were 18.0% and 86.7%, respectively, for the year ended December 31, 2020. Our operating return on equity, a non-GAAP financial measure, was 14.7% for the year ended December 31, 2020. We believe that we are well positioned to continue to capitalize on attractive opportunities in our target market and to prudently grow our business. See "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income to net operating earnings and calculations using net operating earnings (e.g., operating return on equity).

History

Kinsale Capital Group, Inc., a Delaware domiciled insurance holding company, was formed on June 3, 2009 for the purpose of acquiring and managing insurance entities. Prior to September 5, 2014, the Company was a Bermuda registered holding company, formerly known as Kinsale Capital Group, Ltd. ("KCGL"). Effective September 5, 2014, KCGL was re-domesticated from Bermuda to Delaware. A wholly-owned subsidiary of KCGL, Kinsale Capital Group, Inc., which was formed on June 4, 2009 as a U.S. holding company, was immediately merged into the re-domesticated entity and Kinsale Capital Group, Ltd. changed its name to Kinsale Capital Group, Inc.

On June 4, 2009, we incorporated Kinsale Management, Inc. ("Kinsale Management") as a wholly-owned subsidiary domiciled in Delaware, in order to provide management services to all of our U.S.-based subsidiaries.

On February 5, 2010, we acquired American Healthcare Specialty Insurance Company and changed its name to Kinsale Insurance Company ("Kinsale Insurance"). Kinsale Insurance is an Arkansas-domiciled insurance company and is eligible to operate on an excess and surplus lines basis in 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands.

On August 21, 2013, we established Aspera Insurance Services, Inc. ("Aspera"), an insurance broker. Aspera is domiciled in Virginia and is authorized to conduct business in Virginia, Alabama, California, Colorado, Connecticut, Delaware, Florida, Georgia, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Nevada, New Hampshire, New Jersey, New York, North Carolina, Oregon, Pennsylvania, Rhode Island, South Carolina, Texas, Vermont and Washington.

On December 3, 2018, we incorporated Kinsale Real Estate, Inc. ("Kinsale Real Estate"), as a wholly-owned subsidiary domiciled in Delaware, in order to acquire and hold real estate.

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On December 3, 2018, we incorporated 2001 Maywill, LLC, as a wholly-owned subsidiary of Kinsale Real Estate, domiciled in Delaware, in order to acquire and hold our corporate headquarters.

Our Products

We write a broad array of insurance coverages for risks that are unique or hard to place in the standard insurance market. Typical E&S risks include newly established companies or industries, high-risk operations, insureds in litigious venues or companies with poor loss histories. We target classes of business where our underwriters have extensive experience allowing us to compete effectively and earn attractive returns. Our underwriters specialize in individual lines of business which allow them to develop in-depth knowledge and experience of the risks they underwrite. Our core client focus is small to medium-sized accounts, which we believe tend to be subject to less competition and have better pricing. The average premium per policy written by us in 2020 was approximately $9,100. Excluding our personal lines insurance, which has a relatively low premium per policy written, the average premium per policy written was approximately $11,800 in 2020. We believe that our strategy, experience and expertise allow us to compete effectively in the E&S market and will enable us to generate attractive long-term stockholder value.

In 2020, the percentage breakdown of our gross written premiums was 85.6% casualty and 14.4% property. Our commercial lines offerings include construction, small business, excess casualty, commercial property, product liability, allied health, life sciences, general casualty, professional liability, management liability, energy, environmental, health care, inland marine, public entity and commercial insurance. We also write a small amount of homeowners insurance in the personal lines market, which in aggregate represented 3.9% of our gross written premiums in 2020 and is included within our personal insurance division.

Our Competitive Strengths

We believe that our competitive strengths include:

Exclusive focus on the E&S market. The E&S, or non-admitted, market has historically operated at lower loss ratios and higher margins, and has grown direct premiums written more quickly than the admitted market. From 2001 to 2019, A.M. Best Company's ("A.M. Best") domestic professional surplus lines composite produced an average net loss and loss adjustment expense ratio of 69.6% and grew direct premiums written by 7.4% annually, versus 73.7% and 3.7% respectively for the property and casualty ("P&C") industry.

Underwriting expertise across a broad spectrum of hard-to-place risks. We have a broad appetite to underwrite a diverse set of risks across the E&S market. Our underwriting team is highly experienced, and individually underwrites each risk to appropriately price and structure solutions. We balance our broad risk appetite by maintaining a diversified book of smaller accounts with strong pricing and well-defined coverages. Unlike many of our competitors, we do not extend underwriting authority to brokers, agents or other third parties. For the year ended December 31, 2020, our loss and loss adjustment expense ratio was 63.9%.

Technology is a core competency. As an insurance company that was founded in 2009, we have the benefit of having built a proprietary technology platform that reflects the best practices our management team has learned from its extensive prior experience. We operate on an integrated digital platform with a data warehouse that collects an array of statistical data. Our platform provides a high degree of efficiency, accuracy and speed across all of our processes. We are able to use the data that we collect to quickly analyze trends across all functions in our business. Our customized proprietary system helps us to reduce the risk of administrative errors in our policy forms and include all of the necessary exclusions for the specified risk, and provides for the efficient and accurate handling of claims. Additionally, our systems enable us to rapidly respond to brokers, allowing our underwriters to reply to the majority of submissions within 24 hours, a significant benefit to our brokers. We believe that our technology platform will provide us with an enduring competitive advantage as it allows us to quickly respond to market opportunities, and will continue to scale as our business grows.

Significantly lower expense ratio than our competitors. Expense management is ingrained in our business culture. We believe that our proprietary technology platform coupled with our low-cost operation allow us to process policy quotes, underwrite policies and operate at a lower cost than our direct competitors. In particular, our efficient platform allows us

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to provide a higher level of service to our brokers and to target smaller accounts which we believe are generally subject to less competition. For the year ended December 31, 2020, our expense ratio was 22.8%.

Fully integrated claims management. We believe that actively managing our claims is an important aspect of keeping losses low, while accurately setting reserves. We manage all of our claims in-house and do not delegate claims management authority to third parties. We promptly and thoroughly investigate all claims, generally through direct contact with the insured, and leverage both our systems and our underwriters to gather the relevant facts. As necessary, we employ local counsel in defense of our policy holders and independent adjusters for task assignments. When we believe claims are without merit, we vigorously contest payment. We currently average 104 open claims per claims adjuster (88 open claims per claims adjuster excluding catastrophe claims), which we believe is lower than industry average. As of December 31, 2020, our reserves for claims incurred but not reported were approximately 84.9% of our total net loss reserves. Of the total open claims as of December 31, 2020, only 36.6% were open for accident years 2018 and prior.

Entrepreneurial management team with a track record of success. Our management team is highly experienced with an average of over 25 years of relevant experience, bringing together a full suite of underwriting, claims, technology and operating skills that we believe will drive our long-term success. The majority of our management team has a proven track record of successfully building high performing specialty insurance companies. We are led by Michael Kehoe who, prior to founding Kinsale, was the president and chief executive officer of James River Insurance Company from 2002 until 2008. Prior to James River Insurance Company, Mr. Kehoe held several senior positions at Colony Insurance Company. Many of our other employees and members of our management team worked with Mr. Kehoe at James River Insurance Company and have decades of experience at other E&S insurance companies. As meaningful owners of Kinsale, we believe our management team has closely aligned interests with our stockholders.

Our Board of Directors has deep insurance and financial services industry experience. Our Board of Directors is comprised of accomplished industry veterans. Collectively, our board members bring decades of experience from their prior roles operating and working in insurance and other financial services companies.

Our Strategy

We believe that our approach to our business will allow us to achieve our goals of both growing our business and generating attractive returns. Our approach involves:

Expand our presence in the E&S market. According to A.M. Best, the total E&S market was approximately $55.5 billion of direct written premiums in 2019. Based on our 2020 gross written premiums of $552.8 million, our current market share is approximately 1.0%. We believe that our exclusive focus on the E&S market and our high levels of service, including our ability to quote, underwrite and bind insurance policies in a timely manner given our efficient systems, allow us to better serve our brokers and position us to profitably increase our market share.

Generate underwriting profits. We will continue to focus on underwriting profitability regardless of market cycles. Our strategy is to concentrate on hard-to-place risks and to maintain adequate rate levels for the risks that we underwrite. We maintain control over our underwriting process to ensure consistent quality of work. We underwrite each account individually and never delegate authority to any outside agents or brokers.

Maintain a contrarian risk appetite. Our flexibility as an E&S insurer enables us to write business at attractive returns while offering competitive policies to our brokers and insureds. We believe we distinguish ourselves in the market with our contrarian risk appetite and our willingness to offer terms on risks requiring more extensive underwriting that some of our competitors may decline to consider. Such accounts frequently offer us a better risk-adjusted return than those preferred by our competitors due to reduced competition.

Leverage investment in technology to drive efficiencies. We use a proprietary technology platform to drive a high level of efficiency, accuracy and speed in our underwriting and quoting process. We have organized our workflows, designed our systems and aligned our staff to provide superior service levels to brokers while achieving a level of efficiency that we believe provides us with a competitive advantage and helps contribute to our low expense ratio. We believe that automation also reduces human error in our underwriting, policy processing, accounting, collections, and claims adjusting processes. Additionally, we are able to track quotes, monitor historical loss experience and reserve development, and

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measure other relevant metrics at a granular level of detail. We believe that our technology is scalable and will allow us to maintain a low expense ratio as we continue to organically grow our business.

Maintain a strong balance sheet. In order to maintain the confidence of policyholders, brokers, reinsurers, investors, regulators and rating agencies, we seek to establish and maintain a conservative balance sheet. We have a robust process for setting our loss reserves and regularly reviewing our estimates. In addition, we maintain a conservative investment portfolio. Our strong balance sheet allows us to maintain the confidence of our investors and other constituencies, and thereby position ourselves to better achieve our goals.

Our Structure

The chart below displays our corporate structure:

		Kinsale Capital Group, Inc. (Delaware corporation)
Kinsale Management, Inc. (Delaware corporation; management services company)	Kinsale Insurance Company (Arkansas corporation; stock insurance company)		Aspera Insurance Services, Inc. (Virginia corporation; insurance broker)	Kinsale Real Estate, Inc. (Delaware corporation; real estate holding company)
				2001 Maywill, LLC (Delaware limited liability company; real estate entity)

Marketing and Distribution

We market our products through a broad group of independent insurance brokers that we believe can consistently produce reasonable volumes of quality business for us. We also sell policies through our wholly-owned broker, Aspera. Aspera distributes 4.4% of Kinsale’s premiums, primarily personal lines, through independent brokers. Kinsale does not grant its brokers any underwriting or claims authority.

We select our brokers based on management's review of the experience, knowledge and business plan of each broker. While many of our brokers have more than one office, we evaluate each office as if it were a separate brokerage and may appoint some but not all offices owned by a broker for specialized lines of business. We seek brokers with business plans that are consistent with our strategy and underwriting objectives. Brokers must be able to demonstrate an ability to competently produce both the quality and quantity of business that we seek. For our more specialized divisions, we seek to appoint brokers that have a similar focus and demonstrated experience in the particular line of business. Brokers who produce unacceptably low volumes of business may be terminated. Our underwriters regularly visit with brokers in their offices in order to market to these brokers and discuss the products we offer.

For the year ended December 31, 2020, our largest brokers were R-T Specialty, LLC, which produced $72.1 million, or 13.0%, of our gross written premiums, AmWINS Group, LLC, which produced $63.8 million, or 11.5% of our gross written premiums, and CRC Commercial Solutions, which produced $56.5 million, or 10.2% of our gross written premiums. No other broker accounted for more than 10% of our gross written premiums in the year ended December 31, 2020.

It is important to us that we maintain excellent relationships with the group of brokers who present business to us. Commissions are an important part of that relationship, but brokers will also typically consider the ultimate price to the insured, and the service and expertise offered by the carrier when determining where to place their business. In 2020, we paid an average commission to our brokers of 14.6% of gross written premiums. We believe this is slightly lower than the

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average commission paid by our competitors. We believe that our specialization in hard-to-place risks, combined with our high degree of service, including our rapid speed-to-quote, permits us to manage our commission expense as part of our overall management of the underwriting process. Additionally, we do not contract out our underwriting to program managers or general agents which typically requires a higher commission level to compensate the third party for its work on behalf of the carrier.

We sell policies in all 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands. The following tables show our gross written premiums by state for the years ended December 31, 2020, 2019 and 2018.

	Year Ended December 31,
	2020		% of Total		2019		% of Total		2018		% of Total
	($ in thousands)
Gross written premiums by state:
California	$	128,448	23.3	%	$	95,889	24.6	%	$	71,645	26.0	%
Florida	78,412		14.2	%	48,473		12.4	%	32,414		11.8	%
Texas	63,312		11.5	%	48,829		12.5	%	40,102		14.6	%
New York	27,234		4.9	%	27,441		7.0	%	14,311		5.2	%
Washington	23,960		4.3	%	17,339		4.4	%	13,071		4.7	%
Colorado	19,600		3.5	%	11,732		3.0	%	6,395		2.3	%
New Jersey	16,823		3.0	%	11,887		3.1	%	6,890		2.5	%
Arizona	12,722		2.3	%	8,116		2.1	%	5,469		2.0	%
Pennsylvania	11,184		2.0	%	6,867		1.8	%	5,343		1.9	%
Georgia	11,014		2.0	%	6,431		1.7	%	4,807		1.7	%
All other states	160,105		29.0	%	106,690		27.4	%	75,091		27.3	%
	$	552,814	100.0	%	$	389,694	100.0	%	$	275,538	100.0	%

Underwriting

Our underwriting department consisted of approximately 160 employees as of December 31, 2020. We use our proprietary technology platform to drive a high level of efficiency, accuracy and speed in our underwriting and quoting process. We believe our internal business processing systems allow us to maintain a high ratio of underwriters to total employees, as we do not require a significant number of administrative personnel to facilitate our underwriting process. We also believe that our digital environment allows us to engage fewer employees in policy administration.

We are very selective in the policies we choose to bind, with approximately one in every 8 submissions bound. If our underwriters cannot reasonably expect to bind coverage at the combination of premium and coverage that meets our standards, they are encouraged to quickly move on to another prospective opportunity. For the year ended December 31, 2020, we received approximately 461,000 new business submissions, and of those submissions, we issued approximately 300,000 quotes and bound 31,000 policies for a new policy to new submission ratio of 6.7%. We are careful to establish terms that are suited to the risk and the pricing of our policies. As an E&S company, we use our freedom of rate and form assertively in order to appropriately underwrite risks that have already been rejected by licensed carriers constrained by approved forms and filed rates.

Beyond simply selecting risks, we attempt to craft policies that offer affordable protection to insureds by tailoring coverages in ways that make potential losses more predictable and reduce claims costs. For example, our "defense inside the limits" clause, which we applied to more than 99.4% of our professional liability premiums written in 2020, means that funds we expend defending an insured against a claim are counted against the total policy limit. We believe we do not have any material exposure to claims from asbestos, lead paint, silica, mold or nuclear, biological or chemical terrorism.

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Claims

Our claims department consisted of approximately 40 claims professionals who had an average of 11 years of claims experience in the P&C industry as of December 31, 2020. Our Chief Claims Officer has over 30 years of litigation and claims experience in large commercial insurance claims departments. Our claims department is fully integrated with our other functional departments. We manage all of our claims in-house and do not delegate claims management authority to third parties.

We focus on the effective management of the claims adjusting process. This process is achieved by extending low reserve and settlement authority levels to our front-line claim examiners; keeping the adjuster-to-supervisor ratios low to allow for greater supervision over the adjusting process; and monitoring the number of claims handled by each claims examiner. This method ensures that two or more members of the department participate in the decision-making process when appropriate; our claim examiners recognize and address key issues; and reserves are adjusted to the appropriate amount as necessary. We seek to manage the number of claims per claims examiner to allow our claim examiners sufficient time to review and investigate claims submitted. Moreover, prior to any scheduled mediation or trial, claims personnel conduct further peer review to ensure that issues and exposures have been adequately analyzed. In addition, our claim examiners work closely with members of the underwriting staff to keep them apprised of claim trends. Vendor management is also important, and our claim examiners work closely with our vendors to manage expenses and costs.

Information Technology

Our information technology department consisted of approximately 70 full-time employees and contractors as of December 31, 2020. Our Chief Information Officer has over 30 years of experience in the technology field. Our information technology staff utilizes an agile methodology and cloud strategy to develop best-in-class software solutions and to attract and retain quality staff.

We have built a proprietary technology platform that reflects the best practices our management team has learned from its extensive prior experiences. Our proprietary technology platform is comprised of multiple applications and services linked together in an integrated system. Key applications and services supporting the core business were developed in-house. We designed the architecture for our information systems in a fashion that would allow us to reduce our administrative costs and quickly provide us with useful information. Our insurance company subsidiary operates in a digital environment, which eliminates the costs of printing, storing and handling thousands of documents each week. Moreover, by maintaining electronic files on each account, we have been able to facilitate clear communication among personnel responsible for handling matters related to underwriting, servicing and claims as each has access to full information regarding the account.

We use a browser-based platform approach to processing business. When a broker makes a submission, the information is transferred into our browser-based underwriting system. This eliminates costly data-entry steps in our underwriting process and permits the underwriter to focus on underwriting the account accurately and rapidly.

Since inception, we have been intent on capturing and analyzing our data and building, over time, a robust repository of information that we can use to improve our decision making. We refer to this repository as our data warehouse. The design of our data warehouse permits us to capture an array of statistical data, collected by the policy management systems at Kinsale. The data warehouse is easily searchable, collects and labels information in a consistent format and contains most of the underwriting and claims information we collect at every level. The data warehouse permits us flexibility with regard to analyzing our business by segment or in the aggregate. We believe the proprietary technology platform, which includes the data warehouse, is a competitive advantage for us.

Reinsurance

Reinsurance

We enter into reinsurance contracts primarily to limit our exposure to potential large losses. Reinsurance involves an insurance company transferring ("ceding") a portion of its exposure on a risk to another insurer, the reinsurer. The reinsurer assumes the exposure in return for a portion of the premium. Our reinsurance is primarily contracted under quota-share reinsurance contracts and excess of loss contracts. In quota-share reinsurance, the reinsurer agrees to assume a

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specified percentage of the ceding company's losses arising out of a defined class of business in exchange for a corresponding percentage of premiums, net of a ceding commission. In excess of loss reinsurance, the reinsurer agrees to assume all or a portion of the ceding company's losses, in excess of a specified amount. Under excess of loss reinsurance, the premium payable to the reinsurer is negotiated by the parties based on their assessment of the amount of risk being ceded to the reinsurer because the reinsurer does not share proportionately in the ceding company's losses.

We also use facultative reinsurance coverage on a limited basis. Facultative coverage refers to a reinsurance contract on individual risks as opposed to a group or class of business. It is used for a variety of reasons, including supplementing the limits provided by the treaty coverage or covering risks or perils excluded from treaty reinsurance.

We renew our reinsurance treaties annually. During each renewal cycle, there are a number of factors we consider when determining our reinsurance coverage, including (1) plans to change the underlying insurance coverage we offer, (2) trends in loss activity, (3) the level of our capital and surplus, (4) changes in our risk appetite and (5) the cost and availability of reinsurance coverage.

To manage our natural catastrophe exposure, we use computer models to analyze the risk of severe losses. We measure exposure to these losses in terms of probable maximum loss ("PML"), which is an estimate of the amount of loss we would expect to meet or exceed once in a given number of years (referred to as the return period). When managing our catastrophe exposure, we focus on the 100 year and the 250 year return periods. Effective with the June 1, 2020 renewal, we entered into a new personal insurance quota-share treaty. We used model results previously noted to stress test the completeness of our program and determined that over 70% of the modelled losses from catastrophes costing over $10 million came from our personal insurance business. We determined that utilizing a personal lines quota-share treaty combined with a catastrophe treaty was a more efficient and cost-effective way to manage the total loss exposure on our property coverages.

The following is a summary of our significant reinsurance programs as of December 31, 2020:

Line of Business Covered	Company Policy Limit	Reinsurance Coverage	Company Retention
Property - per risk (1)	Up to $10.0 million per risk	$8.0 million excess of $2.0 million	$2.0 million per occurrence
Property - personal insurance (2)	N/A	50% up to $47.5 million per catastrophe	50% of all personal property losses
Property - catastrophe (3)	N/A	$45.0 million excess of $10.0 million	$10.0 million per catastrophe
Primary casualty (4)	Up to $10.0 million per occurrence	$8.0 million excess of $2.0 million	$2.0 million per occurrence
Excess casualty (5)	Up to $10.0 million per occurrence	Variable quota share	$2.0 million per occurrence except as described in note (5) below

(1)    Our property per-risk reinsurance reduces the financial impact of a large loss on a single commercial property or inland marine policy. This treaty includes a reinstatement provision which requires us to pay reinstatement premiums after a loss has occurred in order to preserve coverage.

(2)    Our personal insurance quota-share reinsurance reduces the financial impact of property losses on our personal insurance policies.

(3)    Our property catastrophe reinsurance reduces the financial impact of a catastrophe event involving multiple claims and policyholders. Our property catastrophe reinsurance includes a reinstatement provision which requires us to pay reinstatement premiums after a loss has occurred in order to preserve coverage. Including the reinstatement provision, the maximum aggregate loss recovery limit is $90 million and is in addition to the per-occurrence coverage provided by our facultative and treaty coverages.

(4)    Reinsurance is not applicable to any individual policy with a per-occurrence limit of $2.0 million or less.

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(5)    For casualty policies with a per-occurrence limit higher than $2.0 million, the ceding percentage varies such that the retention is always $2.0 million or less. For example, for a $4.0 million limit excess policy, our retention would be 50%, whereas for a $10.0 million limit excess policy, our retention would be 20%. For policies for which we also write an underlying primary limit, the retention on the primary and excess policy combined would not exceed $2.0 million.

Reinsurance contracts do not relieve us from our obligations to policyholders. Failure of the reinsurer to honor its obligation could result in losses to us, and therefore, we established an allowance for credit risk based on historical analysis of credit losses for highly rated companies in the insurance industry. In formulating our reinsurance programs, we are selective in our choice of reinsurers and we consider numerous factors, the most important of which are the financial stability of the reinsurer, its history of responding to claims and its overall reputation. In an effort to minimize our exposure to the insolvency of our reinsurers, we review the financial condition of each reinsurer annually. In addition, we continually monitor for rating downgrades involving any of our reinsurers. At December 31, 2020, all reinsurance contracts that our insurance subsidiary was party to were with companies with A.M. Best ratings of "A" (Excellent) or better. As of December 31, 2020, we have never had a loss for uncollectible reinsurance.

We had reinsurance recoverables on unpaid losses of $83.7 million at December 31, 2020, and recoverables on paid losses of $9.5 million at December 31, 2020. The following table provides a summary of our top ten reinsurers, based on the amount recoverable, at December 31, 2020:

Reinsurers	A.M. Best Rating		Reinsurance Recoverable
			($ in thousands)
Swiss Reinsurance America Corp.		A+	$	26,336
Munich Reinsurance America, Inc.		A+	19,705
SCOR Reinsurance Co.		A+	11,902
Allied World Reinsurance Co.		A	8,628
Odyssey America Reinsurance Corp.		A	6,536
Arch Reinsurance Co.		A+	6,330
Hannover Ruck SE		A+	3,997
BF Re		A+	2,489
General Reinsurance Corp.		A++	1,738
Partner Reinsurance Co. of the US		A+	1,417
Total for Top Ten			89,078
All others			4,137
Total			$	93,215

We did not have reinsurance recoverables greater than $1.4 million at December 31, 2020 from any individual reinsurer other than the ten listed above.

To reduce credit exposure to reinsurance recoverable balances, we obtain letters of credit from certain reinsurers that are not authorized as reinsurers under U.S. state insurance regulations. In addition, under the terms of our reinsurance contracts discussed above, we may retain funds due from reinsurers as security for those recoverable balances.

Catastrophe Risk Management

In addition to the reinsurance protection noted above, we use other techniques to carefully manage our exposure to catastrophe losses. We use computer models to analyze the risk of severe losses from natural catastrophes. We measure exposure to these losses in terms of PML. When managing our catastrophe exposure, we focus on the 100 year and the 250 year return periods. Our main catastrophe risk arises from hurricanes. We manage this exposure through careful and disciplined underwriting, extensive reinsurance protection purchased from financially strong counterparties and monthly catastrophe modeling of the portfolio. Additionally, we limit the concentration of property business by geographic area to reduce loss exposure from extreme events.

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Reserve Development

We maintain reserves for specific claims incurred and reported, reserves for claims incurred but not reported and reserves for uncollectible reinsurance when appropriate. Our ultimate liability may be greater or less than current reserves. In the insurance industry, there is always the risk that reserves may prove inadequate. We continually monitor reserves using new information on reported claims and a variety of statistical techniques. Anticipated inflation is reflected implicitly in the reserving process through analysis of cost trends and the review of historical development. We do not discount our reserves for unpaid losses and loss adjustment expenses to reflect estimated present value.

See Note 7 of the notes to the consolidated financial statements and "Critical Accounting Estimates" for a discussion of estimates and assumptions related to the reserves for unpaid losses and loss adjustment expenses.

Investments

Investment income is an important component of our earnings. We collect premiums from our insureds and invest a portion of these funds until claims are paid. We seek to maximize investment returns using investment guidelines that stress prudent allocation among cash and cash equivalents, fixed-maturity securities and, to a lesser extent, equity securities.

Our cash and invested assets generally consist of fixed-maturity securities, short-term investments, cash and cash equivalents, exchange traded funds and preferred stock (classified as equity securities on the consolidated balance sheet). Our fixed-maturity securities are classified as "available-for-sale" and are carried at fair value with unrealized gains and losses on those securities reported, net of tax, as a separate component of accumulated other comprehensive income (loss). Our equity securities are carried at fair value and changes in the fair value of these investments are recognized in net income. Fair value generally represents quoted market value prices for securities traded in the public market or prices analytically determined using bid or closing prices for securities not actively traded in the public marketplace. Short-term investments, if any, are reported at cost and include investments that are both readily convertible to known amounts of cash and have maturities of 12 months or less upon acquisition by us.

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Our cash and invested assets totaled $1.3 billion at December 31, 2020 and $908.2 million at December 31, 2019, and is summarized as follows:

	December 31, 2020				December 31, 2019
	Fair Value		% of Portfolio		Fair Value		% of Portfolio
	($ in thousands)
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	—	—	%	$	112	—	%
Obligations of states, municipalities and political subdivisions	230,906		17.9	%	172,893		19.0	%
Corporate and other securities	316,608		24.6	%	184,768		20.4	%
Asset-backed securities	240,661		18.7	%	141,924		15.6	%
Commercial mortgage-backed securities	70,969		5.5	%	56,046		6.2	%
Residential mortgage-backed securities	222,656		17.3	%	173,789		19.1	%
Total fixed maturities	1,081,800		84.0	%	729,532		80.3	%
Equity securities:
Exchange traded funds	98,050		7.6	%	54,463		6.0	%
Nonredeemable preferred stock	31,612		2.4	%	23,831		2.6	%
Total equity securities	129,662		10.0	%	78,294		8.6	%
Cash and cash equivalents	77,093		6.0	%	100,408		11.1	%
Total	$	1,288,555	100.0	%	$	908,234	100.0	%

Our policy is to invest primarily in high quality fixed-maturity securities with a primary focus on preservation of capital and a secondary focus on maximizing our risk adjusted investment returns. Investment policy is set by the Investment Committee of the Board of Directors, subject to the limits of applicable regulations. Our investment policy is designed to comply with the regulatory investment requirements and restrictions to which our insurance subsidiary is subject. Our fixed-maturity portfolio is managed by an outside investment advisory firm, which operates under guidelines approved by our Investment Committee. Our Investment Committee meets periodically and reports to our Board of Directors.

Our investment policy also imposes strict requirements for credit quality, with a minimum average credit quality of the portfolio being rated "AA-" or higher by Standard & Poor's or the equivalent rating from another nationally recognized rating agency. Our investment policy also imposes restrictions on concentrations of securities by class and issuer. As of December 31, 2020, our fixed-maturity portfolio, including cash equivalents, had an average duration of 4.3 years and had an average rating of "AA-."

The following table sets forth the composition of our portfolio of fixed-maturity securities by rating as of December 31, 2020:

	AAA		AA		A		BBB		Below BBB		Total
	($ in thousands)
Obligations of states, municipalities and political subdivisions	$	18,665	$	149,350	$	60,895	$	1,996	$	—	$	230,906
Corporate and other securities	—		16,091		110,702		149,315		40,500		316,608
Asset-backed securities	190,764		27,378		16,053		6,466		—		240,661
Commercial mortgage-backed securities	65,080		5,889		—		—		—		70,969
Residential mortgage-backed securities	38,212		183,466		320		—		658		222,656
Total fixed maturities	$	312,721	$	382,174	$	187,970	$	157,777	$	41,158	$	1,081,800

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The fair value of our investments in fixed-maturity securities at December 31, 2020, summarized by stated maturities follows:

	December 31, 2020
	Estimated		% of
	Fair Value		Fair Value
	($ in thousands)
Due in one year or less	$	15,782	1.4	%
Due after one year through five years	115,390		10.7	%
Due after five years through ten years	169,711		15.7	%
Due after ten years	246,631		22.8	%
Asset-backed securities	240,661		22.2	%
Commercial mortgage-backed securities	70,969		6.6	%
Residential mortgage-backed securities	222,656		20.6	%
Total fixed maturities	$	1,081,800	100.0	%

Actual maturities may differ for some securities because borrowers have the right to call or prepay obligations with or without penalties. As of December 31, 2020, our fixed-maturity security portfolio contained $222.7 million (20.6%) of residential mortgage-backed securities ("RMBS"). RMBS, including collateralized mortgage obligations, are subject to prepayment risks that vary with, among other things, interest rates. During periods of declining interest rates, RMBS generally prepay faster as the underlying mortgages are prepaid and refinanced by the borrowers in order to take advantage of the lower rates. As a result, during periods of falling interest rates, proceeds from such prepayments generally must be reinvested at lower prevailing yields. In addition, RMBS that have an amortized cost that is greater than par (i.e., purchased at a premium) may incur a reduction in yield or a loss as a result of such prepayments. Conversely, during periods of rising interest rates, the rate of prepayments generally slows. RMBS that have an amortized value that is less than par (i.e., purchased at a discount) may incur a decrease in yield as a result of a slower rate of prepayments. Changes in estimated cash flows due to changes in prepayment assumptions from the original purchase assumptions are revised based on current interest rates and the economic environment. Our investment policy does not permit us to own any interest only, principal only or residual tranches of RMBS.

At December 31, 2020, our portfolio of fixed-maturity securities contained corporate bonds with a fair value of $316.6 million. A summary of these securities by industry segment is shown below as of December 31, 2020:

	December 31, 2020
Industry	Fair Value		% of Total
	($ in thousands)
Industrials and other	$	172,500	54.5	%
Financial	122,887		38.8	%
Utilities	21,221		6.7	%
Total	$	316,608	100.0	%

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Approximately 8% of our total cash and investments were invested in exchange traded funds ("ETFs"), which provide low-cost diversification. At December 31, 2020, our ETF balance was comprised of the following funds:

	December 31, 2020
Fund	Fair Value		% of Total
	($ in thousands)
Domestic stock market fund	$	64,760	66.0	%
Dividend yield equity fund	33,290		34.0	%
Total	$	98,050	100.0	%

Approximately 2% of our total cash and investments were invested in nonredeemable preferred stock. A summary of these securities by industry segment is shown below as of December 31, 2020:

	December 31, 2020
Industry	Fair Value		% of Total
	($ in thousands)
Financial	$	27,744	87.8	%
Utilities	3,034		9.6	%
Industrials and other	834		2.6	%
Total	$	31,612	100.0	%

Competition

The P&C insurance industry is highly competitive. We compete with domestic and international insurers, some of which have greater financial, marketing and management resources and experience than we do. We may also compete with new market entrants in the future. Competition is based on many factors, including the perceived market strength of the insurer, pricing and other terms and conditions, services provided, the speed of claims payment, the reputation and experience of the insurer and ratings assigned by independent rating organizations such as A.M. Best. Our insurance subsidiary, Kinsale Insurance, currently has a rating from A.M. Best of "A" (Excellent). Ratings for an insurance company are based on its ability to pay policyholder obligations and are not directed toward the protection of investors.

Today, our primary competitors in the E&S sector include Alleghany Corporation, Argo Group International Holdings, Ltd., James River Group Holdings, Ltd., the Lloyds of London syndicates, Markel Corporation, ProSight Global, Inc., RLI Corp. and W. R. Berkley Corporation.

Regulation

Insurance regulation

We are regulated by insurance regulatory authorities in the states in which we conduct business. State insurance laws and regulations generally are designed to protect the interests of policyholders, consumers and claimants rather than stockholders or other investors. The nature and extent of state regulation varies by jurisdiction, and state insurance regulators generally have broad administrative power relating to, among other matters, setting capital and surplus requirements, licensing of insurers and agents, establishing standards for reserve adequacy, prescribing statutory accounting methods, determining the form and content of statutory financial reports, regulating certain transactions with affiliates and prescribing types and amounts of investments.

Regulation of insurance companies constantly changes as governmental agencies and legislatures react to real or perceived issues. In recent years, the state insurance regulatory framework has come under increased federal scrutiny, and some state legislatures have considered or enacted laws that alter and, in many cases, increase, state authority to regulate insurance companies and insurance holding company systems. Further, the National Association of Insurance Commissioners ("NAIC") and state insurance regulators are continually re-examining existing laws and regulations,

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specifically focusing on issues relating to the solvency of insurance companies, group capital requirements, interpretations of existing laws and the development of new laws. Although the federal government does not directly regulate the business of insurance, federal initiatives often affect the insurance industry in a variety of ways. In addition, the Federal Insurance Office (the "FIO") was established within the U.S. Department of the Treasury by the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act") in July 2010 to monitor all aspects of the insurance industry, including identifying issues or gaps in the regulation of insurers that could contribute to a systemic crisis in the insurance industry or the U.S. financial system. See "—Federal and state legislative and regulatory changes" below.

Required licensing

Kinsale Insurance is organized and domiciled in the State of Arkansas and is authorized (licensed) in the State of Arkansas to transact certain lines of P&C insurance. This license is in good standing, and, pursuant to applicable Arkansas laws and regulations, will continue in force unless suspended, revoked or otherwise terminated, subject to certain conditions, including the payment by Kinsale Insurance of annual continuation fees, the filing of annual statutory financial statements and the filing of an annual registration statement with the Arkansas Insurance Department.

Kinsale Insurance currently operates on an excess and surplus lines basis in all 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands. While Kinsale Insurance does not have to apply for and maintain a license in those states (with the exception of Arkansas, its domiciliary state), it is subject to maintaining suitability standards under each particular state’s surplus lines laws to be included as an eligible surplus lines carrier (as discussed below, the Dodd-Frank Act has brought uniformity to these standards (see "—Federal and state legislative and regulatory changes")). In states in which it operates on a surplus line basis, Kinsale Insurance has freedom of rate and form on the majority of its business. This means that Kinsale Insurance can implement a change in policy form, underwriting guidelines, or rates for a product without regulatory approval.

Almost all insurance is written through licensed agents and brokers. In states in which we operate on a non-admitted basis, general agents and their retail insurance brokers generally are required to certify that a certain number of licensed admitted insurers had been offered and declined to write a particular risk prior to placing that risk with us.

In addition, Aspera, our insurance broker, and designated employees must be licensed to act as insurance producers, adjusters or third-party administrators, as applicable, by insurance regulatory authorities in the states where they operate. Such insurance regulatory authorities are vested in most cases with relatively broad discretion as to the granting, revocation, suspension, and renewal of licenses.

Insurance holding company regulation

We operate as an insurance holding company system and are subject to the insurance holding company laws of the State of Arkansas, the state in which Kinsale Insurance is organized and domiciled. These statutes require that each insurance company in the system register with the insurance department of its state of domicile and furnish information concerning the operations of companies within the holding company system that may materially affect the operations, management or financial condition of the insurers within the system and domiciled in that state. These statutes also provide that all transactions among members of a holding company system must be fair and reasonable. Transactions between insurance subsidiaries and their parents and affiliates generally must be disclosed to the state regulators, and notice to or prior approval of the applicable state insurance regulator generally is required for any material or extraordinary transaction. On December 9, 2020, the NAIC adopted the Group Capital Calculation (“GCC”) template and instructions, as well as corresponding amendments to NAIC model insurance holding company system laws. The amendments require, subject to certain exemptions, that the ultimate controlling person of each insurance group file a GCC on an annual basis with such insurance group’s lead state commissioner. The GCC uses a risk-based capital aggregation approach intended to provide regulators with an additional group supervisory tool.

Changes of control

Before a person can acquire control of a U.S. domestic insurer, prior written approval must be obtained from the insurance commissioner of the state where the insurer is domiciled. Prior to granting approval of an application to acquire control of a domestic insurer, the domiciliary state insurance commissioner will consider a number of factors, which include the

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financial strength of the proposed acquiror, the acquiror’s plans for the future operations of the domestic insurer and any anti-competitive results that may arise from the consummation of the acquisition of control.

Generally, state insurance statutes provide that control over a domestic insurer is presumed to exist if any person, directly or indirectly, owns, controls, holds with the power to vote, or holds proxies representing, ten percent or more of the voting securities of the domestic insurer. This statutory presumption of control may be rebutted by a showing that control does not exist in fact. The state regulators, however, may find that "control" exists in circumstances in which a person owns or controls less than ten percent of the voting securities of the domestic insurer.

As Kinsale Insurance is domiciled in Arkansas, the insurance laws and regulations of that state would be applicable to any proposed acquisition of control of Kinsale Insurance. Under applicable Arkansas insurance laws and regulations, no person may acquire control of a domestic insurer until written approval is obtained from the state insurance commissioner following a public hearing on the proposed acquisition. Such approval would be contingent upon the state insurance commissioner’s consideration of a number of factors, including among others, the financial strength of the proposed acquiror, the integrity and management of the acquiror’s board of directors and executive officers, the acquiror’s plans for the future operations of the domestic insurer and any anti-competitive results that may arise from the consummation of the acquisition of control. Arkansas insurance laws and regulations contain a rebuttable presumption of control if any person directly or indirectly acquires ten percent or more of the voting stock of an Arkansas-domiciled insurer. Accordingly, the acquisition of ten percent or more of our common stock would be considered an indirect change of control of Kinsale Insurance and would trigger the applicable change of control filing requirements under Arkansas insurance laws and regulations, absent a disclaimer of control filing and its acceptance by the Arkansas Insurance Department. These requirements may discourage potential acquisition proposals and may delay, deter or prevent a change of control of us, including through transactions that some or all of our stockholders might consider to be desirable.

Restrictions on paying dividends

State insurance laws restrict the ability of insurance companies to declare and pay stockholder dividends. State insurance regulators require insurance companies to maintain specified levels of statutory capital and surplus. The maximum dividend distribution absent the approval or non-disapproval of the insurance regulatory authority in Arkansas is limited by Arkansas law to the greater of 10% of policyholder surplus as of December 31 of the previous year or net income, not including realized capital gains, for the previous calendar year. Dividend payments are further limited to that part of available policyholder surplus which is derived from net profits on an insurer’s business.

Investment regulation

Kinsale Insurance is subject to state laws which require diversification of our investment portfolios and limits on the amount of our investments in certain categories. Failure to comply with these laws and regulations would cause non-conforming investments to be treated as non-admitted assets in the states in which we are licensed to sell insurance policies for purposes of measuring statutory surplus and, in some instances, would require us to sell those investments.

Restrictions on cancellation, non-renewal or withdrawal

Many states have laws and regulations that limit the ability of an insurance company licensed by that state to exit a market. Some states prohibit an insurer from withdrawing from one or more lines of business in the state except pursuant to a plan approved by the state insurance regulator, which may disapprove a plan that may lead to market disruption. Some state statutes may explicitly or by interpretation apply these restrictions to insurers operating on a surplus lines basis.

Enterprise risk and other developments

The NAIC, as part of its solvency modernization initiative, has engaged in a concerted effort to strengthen the ability of U.S. state insurance regulators to monitor U.S. insurance holding company groups. Recent efforts by the NAIC to establish group capital standards are consistent with this initiative. State insurance holding company laws, including those in Arkansas, address "enterprise" risk - the risk that an activity, circumstance, event or series of events involving one or more affiliates of an insurer will, if not remedied promptly, be likely to have a material adverse effect upon the financial condition or liquidity of the insurer or its insurance holding company system as a whole - and require annual reporting of potential enterprise risk as well as access to information to allow the state insurance regulator to assess such

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risk. Under Arkansas insurance holding company laws, the ultimate controlling person of insurers subject to registration is required to file an annual enterprise risk report with the lead state commissioner, when applicable, of the insurance holding company system as determined by the procedures within the Financial Analysis Handbook adopted by the NAIC.

In 2012, the NAIC adopted the Risk Management and Own Risk and Solvency Assessment ("ORSA") Model Act. The ORSA Model Act, when adopted by state regulators requires domestic insurers to maintain a risk management framework and establishes a legal requirement for domestic insurers to conduct an ORSA. The ORSA is a confidential internal assessment, appropriate to the nature, scale and complexity of an insurer, regarding the material and relevant risks identified by the insurer associated with an insurer’s current business plan and the sufficiency of capital resources to support those risks. Effective July 2015, Arkansas adopted its version of the ORSA Model Act. Our subsidiary, Kinsale Insurance, is subject to the requirements of the ORSA Model Act adopted in its domicile of Arkansas.

Additionally, in response to the growing threat of cyber-attacks in the insurance industry, certain jurisdictions have begun to consider new cybersecurity measures, including the adoption of cybersecurity regulations which, among other things, would require insurance companies to establish and maintain a cybersecurity program and implement and maintain cybersecurity policies and procedures. On October 24, 2017, the NAIC adopted its Insurance Data Security Model Law, intended to serve as model legislation for states to enact in order to govern cybersecurity and data protection practices of insurers, insurance agents, and other licensed entities registered under state insurance laws (Arkansas has not yet adopted this model legislation). The New York State Department of Financial Services (DFS) issued regulations governing cybersecurity requirements for financial services companies, which became effective on March 1, 2017, and requires insurance companies, among others, regulated in New York to assess their specific cyber risk profiles and design cyber security programs to address such risks. We annually file our program compliance certifications pertaining to the DFS cybersecurity requirements in New York.

Federal and state legislative and regulatory changes

The U.S. federal government’s oversight of the insurance industry was expanded under the Dodd-Frank Act. Prior to the enactment of the Dodd-Frank Act in July 2010, the U.S. federal government’s regulation of the insurance industry was essentially limited to certain insurance products, such as flood insurance, multi-peril crop insurance and reinsurance of losses from terrorism. As part of the overall federal financial regulatory reform package contained in the Dodd-Frank Act, Congress has legislated reforms in the surplus lines sector (among others).

The Dodd-Frank Act incorporates the Nonadmitted and Reinsurance Reform Act of 2010 ("NRRA"), which became effective on July 21, 2011. Among other things, the NRRA establishes national uniform standards on how states may regulate and tax surplus lines insurance and sets national standards concerning the regulation of reinsurance. In particular, the NRRA gives regulators in the home state of an insured exclusive authority to regulate and tax surplus lines insurance transactions, and regulators in a ceding insurer’s state of domicile the sole responsibility for regulating the balance sheet credit that the ceding insurer may take for reinsurance recoverables.

The Dodd-Frank Act also established the FIO in the U.S. Department of the Treasury and vested the FIO with the authority to monitor all aspects of the insurance sector, monitor the extent to which traditionally underserved communities and consumers have access to affordable non-health insurance products, and to represent the United States on prudential aspects of international insurance matters, including at the International Association of Insurance Supervisors (the "IAIS"). In addition, the FIO serves as an advisory member of the Financial Stability Oversight Council, assists the secretary of the U.S. Department of the Treasury with administration of the Terrorism Risk Insurance Program, and advises the secretary of the U.S. Department of the Treasury on important national and international insurance matters. In addition, the FIO has the ability to recommend to the Financial Stability Oversight Council the designation of an insurer as "systemically significant" and therefore subject to regulation by the Federal Reserve as a bank holding company.

In limited circumstances, the FIO can declare a state insurance law or regulation "preempted," but this can be done only after extensive consultation with state insurance regulators, the Office of the U.S. Trade Representative and key insurance industry players (in trade associations representing insurers and intermediaries). Additionally, the FIO must publish a notice regarding the basis for the preemption in the Federal Register, allowing a reasonable opportunity for comments. The FIO cannot preempt state antitrust laws governing rate making, underwriting, sales practices or coverage

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requirements. No later than September 30th of each year, the FIO must submit an annual report to Congress explaining any use of the preemption authority during the prior year.

In addition, a number of federal laws affect and apply to the insurance industry, including various privacy laws and the economic and trade sanctions implemented by the Office of Foreign Assets Control ("OFAC") of the U.S. Department of the Treasury. OFAC maintains and enforces economic sanctions against certain foreign countries and groups and prohibits U.S. persons from engaging in certain transactions with certain persons or entities. OFAC has imposed civil penalties on persons, including insurance and reinsurance companies, arising from violations of its economic sanctions program.

On November 20, 2015, the FIO and the Office of the U.S. Trade Representative announced their intention to exercise their authority under the Dodd-Frank Act to negotiate a “covered agreement” with the European Union (the “Covered Agreement”). After a number of private negotiating sessions, on January 13, 2017, the U.S. Department of Treasury and the Office of the U.S. Trade Representative notified Congress that they had completed negotiations with the European Union for the Covered Agreement, which addressed reinsurance, insurance group supervision and the exchange of information between insurance supervisors. The Covered Agreement was formally entered into on September 22, 2017. A covered agreement between the United States and the United Kingdom extending terms nearly identical to the EU Covered Agreement to insurers and reinsurers operating in the UK following Brexit was entered into on December 11, 2018.

With respect to reinsurance, under the Covered Agreement, both the U.S. and the European Union agreed that their supervisory authorities will not impose reinsurance collateral requirements or "local presence" requirements on a reinsurer domiciled in (or with a head office in) the other’s territory that are less favorable than collateral or local presence requirements applied to a domestic reinsurer. However, the collateral or local presence provisions apply only if the insurer or reinsurer satisfies certain conditions and standards, including among others, minimum capital and risk-based capital, confirmation of financial condition by the reinsurer’s domestic regulator and claims payment standards. U.S. states have five years from execution of the Covered Agreement to adopt reinsurance reforms removing collateral requirements for European Union reinsurers that meet the prescribed conditions in the Covered Agreement. If the FIO determines that state laws are inconsistent with the Covered Agreement (the process of making potential preemption determinations will begin 42 months following execution of the Covered Agreement), such states laws may be preempted.

On June 25, 2019, the NAIC adopted revisions to the Credit for Reinsurance Model Law and Regulation in order to satisfy the substantive and timing requirements of the Covered Agreement. These amendments pave the way for state legislatures to bring their credit for reinsurance laws into compliance with the Covered Agreement's zero reinsurance collateral provisions by September 2022, thereby avoiding a potential federal preemption of these laws (Arkansas has not yet adopted the Credit for Reinsurance Model Law and Regulation).

Trade practices

The manner in which insurance companies and insurance agents and brokers conduct the business of insurance is regulated by state statutes in an effort to prohibit practices that constitute unfair methods of competition or unfair or deceptive acts or practices. Prohibited practices include, but are not limited to, disseminating false information or advertising, unfair discrimination, rebating and false statements. We set business conduct policies and provide training to make our employee-agents and other sales personnel aware of these prohibitions, and we require them to conduct their activities in compliance with these statutes.

Unfair claims practices

Generally, insurance companies, adjusting companies and individual claims adjusters are prohibited by state statutes from engaging in unfair claims practices on a flagrant basis or with such frequency to indicate a general business practice. Unfair claims practices include, but are not limited to, misrepresenting pertinent facts or insurance policy provisions; failing to acknowledge and act reasonably promptly upon communications with respect to claims arising under insurance policies; and attempting to settle a claim for less than the amount to which a reasonable person would have believed such person was entitled. We set business conduct policies and conduct training to make our employee-adjusters and other

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claims personnel aware of these prohibitions, and we require them to conduct their activities in compliance with these statutes.

Credit for reinsurance

State insurance laws permit U.S. insurance companies, as ceding insurers, to take financial statement credit for reinsurance that is ceded, so long as the assuming reinsurer satisfies the state’s credit for reinsurance laws. The NRRA contained in the Dodd-Frank Act provides that if the state of domicile of a ceding insurer is an NAIC accredited state, or has financial solvency requirements substantially similar to the requirements necessary for NAIC accreditation, and recognizes credit for reinsurance for the insurer’s ceded risk, then no other state may deny such credit for reinsurance. Because all states are currently accredited by the NAIC, the Dodd-Frank Act prohibits a state in which a U.S. ceding insurer is licensed but not domiciled from denying credit for reinsurance for the insurer’s ceded risk if the cedant’s domestic state regulator recognizes credit for reinsurance. The ceding company in this instance is permitted to reflect in its statutory financial statements a credit in an aggregate amount equal to the ceding company’s liability for unearned premium (which are that portion of written premiums which applies to the unexpired portion of the policy period), loss reserves and loss expense reserves to the extent ceded to the reinsurer.

Periodic financial and market conduct examinations

The insurance regulatory authority in the State of Arkansas, our insurance subsidiary’s state of domicile, conducts on-site visits and examinations of the affairs of our insurance subsidiary, including its financial condition, its relationships and transactions with affiliates and its dealings with policyholders, every three to five years, and may conduct special or targeted examinations to address particular concerns or issues at any time. Insurance regulators of other states in which we do business also may conduct examinations. The results of these examinations can give rise to regulatory orders requiring remedial, injunctive or other corrective action. Insurance regulatory authorities have broad administrative powers to regulate trade practices and, in that connection, to restrict or rescind licenses to transact business and to levy fines and monetary penalties against insurers and insurance agents and brokers found to be in violation of applicable laws and regulations.

Risk-based capital

Risk-based capital ("RBC") laws are designed to assess the minimum amount of capital that an insurance company needs to support its overall business operations and to ensure that it has an acceptably low expectation of becoming financially impaired. State insurance regulators use RBC to set capital requirements, considering the size and degree of risk taken by the insurer and taking into account various risk factors including asset risk, credit risk, underwriting risk and interest rate risk. As the ratio of an insurer’s total adjusted capital and surplus decreases relative to its risk-based capital, the RBC laws provide for increasing levels of regulatory intervention culminating with mandatory control of the operations of the insurer by the domiciliary insurance department at the so-called mandatory control level.

The Arkansas Insurance Department has largely adopted the model legislation promulgated by the NAIC pertaining to RBC, and requires annual reporting by Arkansas-domiciled insurers to confirm that the minimum amount of RBC necessary for an insurer to support its overall business operations has been met. Arkansas-domiciled insurers falling below a calculated threshold may be subject to varying degrees of regulatory action, including supervision, rehabilitation or liquidation by the Arkansas Insurance Department. Failure to maintain our risk-based capital at the required levels could adversely affect the ability of Kinsale Insurance to maintain the regulatory authority necessary to conduct our business. However, as of December 31, 2020, Kinsale Insurance maintained RBC levels significantly in excess of amounts that would require any corrective actions.

IRIS ratios

The NAIC Insurance Regulatory Information System, or IRIS, is part of a collection of analytical tools designed to provide state insurance regulators with an integrated approach to screening and analyzing the financial condition of insurance companies operating in their respective states. IRIS is intended to assist state insurance regulators in targeting resources to those insurers in greatest need of regulatory attention. IRIS consists of two phases: statistical and analytical. In the statistical phase, the NAIC database generates key financial ratio results based on financial information obtained from insurers’ annual statutory statements. The analytical phase is a review of the annual statements, financial ratios and

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other automated solvency tools. The primary goal of the analytical phase is to identify companies that appear to require immediate regulatory attention. A ratio result falling outside the usual range of IRIS ratios is not considered a failing result; rather, unusual values are viewed as part of the regulatory early monitoring system. Furthermore, in some years, it may not be unusual for financially sound companies to have several ratios with results outside the usual ranges. An insurance company may fall out of the usual range for one or more ratios because of specific transactions that are in themselves immaterial.

Ratings

A.M. Best, which rates insurance companies based on factors of concern to policyholders, rates our insurance subsidiary. A.M. Best assigns ratings to insurance companies, which range from "A++" (Superior) to "F" (In Liquidation). Our insurance subsidiary, Kinsale Insurance, has a rating of "A" (Excellent), which is the third highest rating. In evaluating a company's financial and operating performance, A.M. Best reviews the company's profitability, leverage and liquidity, as well as its book of business, the adequacy and soundness of its reinsurance, the quality and estimated market value of its assets, the adequacy of its loss and loss expense reserves, the adequacy of its surplus, its capital structure, the experience and competence of its management and its market presence. A.M. Best's ratings reflect its opinion of an insurance company's financial strength, operating performance and ability to meet its obligations to policyholders. These evaluations are not directed to purchasers of an insurance company's securities.

Human Capital

As of February 18, 2021, we had 323 full-time and 12 part-time employees, all of whom are employed by us through arrangements with Kinsale Management, Inc., and are located at our headquarters in Richmond, Virginia. Our employees are not subject to any collective bargaining agreements, and we are not aware of any current efforts to implement such an agreement. We consider our relationship with our employees to be good.

We believe our employees are key to achieving our business objectives. During fiscal year 2020, the Company launched remote-working protocols due to the escalating COVID-19 outbreak and, as a result, over 90% of our employees worked from home for a portion of time during the eight months spanning from March through October. Before our employees returned during the September to October time frame, we implemented COVID-19 protocols to minimize the spread of the virus in our workplace. These protocols, which currently remain in place, meet or exceed the Centers for Disease Control, Virginia Department of Health, and Virginia Department of Labor and Industry guidelines and, where applicable, our state mandate. Additionally, during the fourth quarter of 2020, we moved into a new headquarters building. Our new building utilizes technological amenities which facilitates the health and wellness of our employees. For example, our building’s heating, ventilation and air conditioning (“HVAC”) system monitors air quality and pulls air from the outside rather than simply recirculating it, which helps reduce indoor airborne contaminants. Many of our building’s fixtures are touchless, such as restroom doors, lighting fixtures, wash basins and elevators. We have also taken advantage of newer technologies to help sanitize the air, such as ultraviolet (“UV”) filters in our HVAC system. We continue to evaluate health and wellness initiatives which are in the best interests of our employees and the stakeholders of our Company.

Compensation and Benefits

We believe that our employees are one of our most valuable assets and paying our employees well is the foundation of our performance-based culture. In order to attract and retain talent, we offer and maintain market competitive compensation and benefit programs to all our employees. Our compensation program includes base salary, performance-based cash awards and equity grants for some management level employees. In 2020, the median pay of all our full-time employees was more than $97,000. The mix of these rewards varies depending on the employee’s role at the Company and our longstanding pay-for-performance philosophy. While all of our employees are eligible to participate in the variable compensation element of our program (annual cash bonus and equity awards), variable compensation becomes a larger portion of the total mix for employees at higher levels in the organization. Our executives, who are responsible for the development and execution of our strategic and financial plans, have the largest portion of their compensation tied to equity-based incentives to ensure financial alignment with our stakeholders.

In addition to competitive compensation, we offer our employees comprehensive and flexible benefit options including:

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•Company-matched 401(k) plan

•Educational assistance program

•Medical insurance, with one tier being zero cost

•Company-paid insurance benefits

•Health savings with large employer contributions and flexible spending accounts

•Paid time off, family leave, and employee assistance programs.

Diversity and Inclusion

We are committed to fostering a diverse and inclusive work environment free from discrimination of any kind and that supports the communities we serve. We seek to recruit the best qualified employees regardless of gender, ethnicity or other protected traits and it is our policy to fully comply with all laws applicable to discrimination in the workplace. Our diversity and inclusion principles are reflected in our employee training and policies.

Available Information

We file annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and other information with the SEC. The SEC maintains an internet web site that contains reports, proxy and information statements and other information regarding issuers, including us, that file electronically with the SEC. The address of that site is http://www.sec.gov. Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and other information filed by us with the SEC are available, without charge, on our internet web site, http://www.kinsalecapitalgroup.com, as soon as reasonably practicable after they are filed electronically with the SEC. The information on our website is not a part of this Annual Report.

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Item 1A. Risk Factors

You should carefully consider the risks and uncertainties described below, together with all of the other information in this Annual Report on Form 10-K. The risks and uncertainties described below are not the only ones facing us. There may be additional risks and uncertainties of which we currently are unaware or currently believe to be immaterial. The occurrence of any of these risks could materially and adversely affect our business, financial condition, liquidity, results of operations and prospects.

Risks Related to Our Business, Industry, and Operations

Our loss reserves may be inadequate to cover our actual losses, which could have a material adverse effect on our financial condition, results of operations and cash flows.

Our success depends on our ability to accurately assess the risks related to the businesses and people that we insure. We establish loss and loss adjustment expense reserves for the ultimate payment of all claims that have been incurred, and the related costs of adjusting those claims, as of the date of our financial statements. Reserves do not represent an exact calculation of liability. Rather, reserves represent an estimate of what we expect the ultimate settlement and administration of claims will cost us, and our ultimate liability may be greater or less than our estimate.

As part of the reserving process, we review historical data and consider the impact of such factors as:

•claims inflation, which is the sustained increase in cost of raw materials, labor, medical services and other components of claims cost;

•claims development patterns by line of business and by "claims made" versus "occurrence" policies;

•legislative activity;

•social and economic patterns; and

•litigation, judicial and regulatory trends.

These variables are affected by both internal and external events that could increase our exposure to losses, and we continually monitor our reserves using new information on reported claims and a variety of statistical techniques. This process assumes that past experience, adjusted for the effects of current developments and anticipated trends, is an appropriate basis for predicting future events. There is, however, no precise method for evaluating the impact of any specific factor on the adequacy of reserves, and actual results may deviate, perhaps substantially, from our reserve estimates. For instance, the following uncertainties may have an impact on the adequacy of our reserves:

•When we write "occurrence" policies, we are obligated to pay covered claims, up to the contractually agreed amount, for any covered loss that occurs while the policy is in force. Accordingly, claims may arise many years after a policy has lapsed. Approximately 79.4% of our net casualty loss reserves were associated with "occurrence" policies as of December 31, 2020.

•Even when a claim is received (irrespective of whether the policy is a "claims made" or "occurrence" basis form), it may take considerable time to fully appreciate the extent of the covered loss suffered by the insured and, consequently, estimates of loss associated with specific claims can increase over time.

•New theories of liability are enforced retroactively from time to time by courts. See also "—The failure of any of the loss limitations or exclusions we employ, or changes in other claims or coverage issues, could have a material adverse effect on our financial condition or results of operations."

•Volatility in the financial markets, economic events and other external factors may result in an increase in the number of claims and/or severity of the claims reported. In addition, elevated inflationary conditions would, among other things, cause loss costs to increase. See also "—Adverse economic factors, including recession, inflation, periods of high unemployment or lower economic activity could result in the sale of fewer policies than expected or an increase in frequency or severity of claims and premium defaults or both, which, in turn, could affect our growth and profitability."

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•If claims were to become more frequent, even if we had no liability for those claims, the cost of evaluating such potential claims could escalate beyond the amount of the reserves we have established. As we enter new lines of business, or as a result of new theories of claims, we may encounter an increase in claims frequency and greater claims handling costs than we had anticipated.

In addition, there may be significant reporting lags between the occurrence of the insured event and the time it is actually reported to us and additional lags between the time of reporting and final settlement of any claims. Consequently, estimates of loss associated with specified claims can increase as new information emerges, which could cause the reserves for the claim to become inadequate.

If any of our reserves should prove to be inadequate, we will be required to increase our reserves resulting in a reduction in our net income and stockholders’ equity in the period in which the deficiency is identified. Future loss experience substantially in excess of established reserves could also have a material adverse effect on our future earnings and liquidity and our financial rating.

For further discussion of our reserve experience, please see "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Estimates — Reserves for Unpaid Losses and Loss Adjustment Expenses."

Given the inherent uncertainty of models, the usefulness of such models as a tool to evaluate risk is subject to a high degree of uncertainty that could result in actual losses that are materially different than our estimates, including PMLs. A deviation from our loss estimates may adversely impact, perhaps significantly, our financial results.

Our approach to risk management relies on subjective variables that entail significant uncertainties. For example, we rely heavily on estimates of PMLs for certain events that are generated by computer-run models. In addition, we rely on historical data and scenarios in managing credit and interest rate risks in our investment portfolio. These estimates, models, data and scenarios may not produce accurate predictions and consequently, we could incur losses both in the risks we underwrite and to the value of our investment portfolio.

We use third-party vendor analytic and modeling capabilities to provide us with objective risk assessment relating to other risks in our reinsurance portfolio. We use these models to help us control risk accumulation, inform management and other stakeholders of capital requirements and to improve the risk/return profile or minimize the amount of capital required to cover the risks in each of our reinsurance contracts. However, given the inherent uncertainty of modeling techniques and the application of such techniques, these models and databases may not accurately address a variety of matters which might impact certain of our coverages.

Small changes in assumptions, which depend heavily on our judgment and foresight, can have a significant impact on the modeled outputs. For example, catastrophe models that simulate loss estimates based on a set of assumptions are important tools used by us to estimate our PMLs. These assumptions address a number of factors that impact loss potential including, but not limited to, the characteristics of a given natural catastrophe event; the increase in claim costs resulting from limited supply of labor and materials needed for repairs following a catastrophe event (demand surge); the types, function, location and characteristics of exposed risks; susceptibility of exposed risks to damage from an event with specific characteristics; and the financial and contractual provisions of the (re)insurance contracts that cover losses arising from an event. We run many model simulations in order to understand the impact of these assumptions on a catastrophe’s loss potential. Furthermore, there are risks associated with catastrophe events, which are either poorly represented or not represented at all by catastrophe models. Each modeling assumption or un-modeled risk introduces uncertainty into PML estimates that management must consider. These uncertainties can include, but are not limited to, the following:

•The models do not address all the possible hazard characteristics of a catastrophe peril (e.g. the precise path and wind speed of a hurricane);

•The models may not accurately reflect the true frequency of events;

•The models may not accurately reflect a risk's vulnerability or susceptibility to damage for a given event characteristic;

•The models may not accurately represent loss potential to insurance or reinsurance contract coverage limits, terms

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and conditions; and

•The models may not accurately reflect the impact on the economy of the area affected or the financial, judicial, political, or regulatory impact on insurance claim payments during or following a catastrophe event.

Our PMLs are reviewed by management after the assessment of outputs from multiple third-party vendor models and other qualitative and quantitative assessments, including exposures not typically modeled in vendor models. Our methodology for estimating PMLs may differ from methods used by other companies and external parties given the various assumptions and judgments required to estimate a PML.

As a result of these factors and contingencies, our reliance on assumptions and data used to evaluate our entire reinsurance portfolio and specifically to estimate a PML is subject to a high degree of uncertainty that could result in actual losses that are materially different from our PML estimates and our financial results could be adversely affected.

The failure of any of the loss limitations or exclusions we employ, or changes in other claims or coverage issues, could have a material adverse effect on our financial condition or results of operations.

Although we seek to mitigate our loss exposure through a variety of methods, the future is inherently unpredictable. It is difficult to predict the timing, frequency and severity of losses with statistical certainty. It is not possible to completely eliminate our exposure to unforecasted or unpredictable events and, to the extent that losses from such risks occur, our financial condition and results of operations could be materially adversely affected.

For instance, various provisions of our policies, such as limitations or exclusions from coverage or choice of forum, which have been negotiated to limit our risks, may not be enforceable in the manner we intend. At the present time, we employ a variety of endorsements to our policies that limit exposure to known risks. As industry practices and legal, judicial, social and other conditions change, unexpected and unintended issues related to claims and coverage may emerge.

In addition, we design our policy terms to manage our exposure to expanding theories of legal liability like those which have given rise to claims for lead paint, asbestos, mold, construction defects and environmental matters. Many of the policies we issue also include conditions requiring the prompt reporting of claims to us and entitle us to decline coverage in the event of a violation of those conditions. Also, many of our policies limit the period during which a policyholder may bring a claim under the policy, which in many cases is shorter than the statutory period under which such claims can be brought against our policyholders. While these exclusions and limitations help us assess and reduce our loss exposure and help eliminate known exposures to certain risks, it is possible that a court or regulatory authority could nullify or void an exclusion or legislation could be enacted modifying or barring the use of such endorsements and limitations. These types of governmental actions could result in higher than anticipated losses and loss adjustment expenses, which could have a material adverse effect on our financial condition or results of operations.

As industry practices and legal, judicial, social and other environmental conditions change, unexpected and unintended issues related to claims and coverage may emerge. Three examples of unanticipated risks that have adversely affected the insurance industry are:

•Asbestos liability applied to manufacturers of products and contractors who installed those products.

•Apportionment of liability arising from subsidence claims assigned to subcontractors who may have been involved in mundane tasks (such as installing sheetrock in a home).

•Court decisions, such as the 1995 Montrose decision in California, that read policy exclusions narrowly so as to expand coverage, thereby requiring insurers to create and write new exclusions.

These issues may adversely affect our business by either broadening coverage beyond our underwriting intent or by increasing the number or size of claims. In some instances, these changes may not become apparent until sometime after we have issued insurance contracts that are affected by the changes. As a result, the full extent of liability under our insurance contracts may not be known for many years after a contract is issued.

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We may be unable to obtain reinsurance coverage at reasonable prices or on terms that adequately protect us.

We use reinsurance to help manage our exposure to insurance risks. Reinsurance is a practice whereby one insurer, called the reinsurer, agrees to indemnify another insurer, called the ceding insurer, for all or part of the potential liability arising from one or more insurance policies issued by the ceding insurer. The availability and cost of reinsurance are subject to prevailing market conditions, both in terms of price and available capacity, which can affect our business volume and profitability. In addition, reinsurance programs are generally subject to renewal on an annual basis. We may not be able to obtain reinsurance on acceptable terms or from entities with satisfactory creditworthiness. If we are unable to obtain new reinsurance facilities or to renew expiring facilities, our net exposures would increase. In such event, if we are unwilling to bear an increase in our net exposure, we would have to reduce the level of our underwriting commitments, which would reduce our revenues.

Many reinsurance companies have begun to exclude certain coverages from, or alter terms in, the reinsurance contracts we enter into with them. Some exclusions are with respect to risks that we cannot exclude in policies we write due to business or regulatory constraints. In addition, reinsurers are imposing terms, such as lower per-occurrence and aggregate limits, on direct insurers that do not wholly cover the risks written by these direct insurers. As a result, we, like other direct insurance companies, write insurance policies which to some extent do not have the benefit of reinsurance protection. These gaps in reinsurance protection expose us to greater risk and greater potential losses. For example, certain reinsurers have excluded coverage for terrorist acts or priced such coverage at rates higher than the underlying risk. Many direct insurers, including us, have written policies without terrorist act exclusions and in many cases we cannot exclude terrorist acts because of regulatory constraints. We may, therefore, be exposed to potential losses as a result of terrorist acts. See also "Business — Reinsurance."

Severe weather conditions, catastrophes, pandemics and similar events may adversely affect our business, results of operations and financial condition.

Our business is exposed to the risk of severe weather conditions and other catastrophes. Catastrophes can be caused by various events, including natural events such as severe winter weather, tornadoes, windstorms, earthquakes, hailstorms, severe thunderstorms and fires, and other events such as explosions, war, terrorist attacks and riots. The incidence and severity of catastrophes and severe weather conditions are inherently unpredictable. The extent of losses from catastrophes is a function of the total amount of losses incurred, the number of insureds affected, the frequency and severity of the events, the effectiveness of our catastrophe risk management program and the adequacy of our reinsurance coverage. Insurance companies are not permitted to reserve for a catastrophe until it has occurred. Severe weather conditions and catastrophes can cause losses in our property lines and generally result in both an increase in the number of claims incurred and an increase in the dollar amount of each claim asserted, which may require us to increase our reserves, causing our liquidity and financial condition to deteriorate. In addition, our inability to obtain reinsurance coverage at reasonable rates and in amounts adequate to mitigate the risks associated with severe weather conditions and other catastrophes could have a material adverse effect on our business and results of operations.

Our business is also exposed to the risk of pandemics, outbreaks, public health crises, and geopolitical and social events, and their related effects. On March 11, 2020, the World Health Organization designated COVID-19 as a global pandemic. In response, governmental authorities (including the U.S. federal government, states and localities) have mandated, and continue to introduce, measures to slow the transmission of the virus, including shelter-in-place orders, significant restrictions on travel, limits on gatherings, quarantines and business shutdowns. While to date we have not seen a decrease in the growth rate of our gross written premiums since the beginning of the COVID-19 pandemic and related economic downturn, the COVID-19 situation remains fluid and continues to evolve, and at this time we are unable to determine the ultimate impact of COVID-19 and related economic downturn on our business, financial condition, results of operations and cash flows. While policy terms and conditions in the lines of business written by Kinsale would be expected to preclude coverage for virus-related claims, court decisions and governmental actions may challenge the validity of any exclusions or our interpretation of how such terms and conditions operate. In addition, in response to COVID-19, legislative, regulatory and judicial actions may include, but are not limited to, actions prohibiting us from cancelling insurance policies in accordance with our policy terms, ordering us to provide premiums refunds, granting extended grace periods for payment of premiums and providing for extended periods of time to pay past due premiums. We are closely monitoring the impact of the COVID-19 pandemic and related economic downturn on all aspects of our business,

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including how it will impact premium volume, losses and the fair value of our investment portfolio as well as how it may result in other effects such as the potential for delayed reporting and settlement of claims due to limited access to business locations. During the first quarter of 2020, we experienced a significant decline in the fair value of our investment portfolio due to disruption in the global financial markets associated with COVID-19, which adversely affected our total comprehensive income (loss) for the quarter. Subsequent to the first quarter of 2020, the fair values of our investment portfolio rebounded sharply, gaining back all of the decline in fair value. If the COVID-19 pandemic continues for a significant length of time and measures put in place to stabilize the economy are not effective, or pandemics, outbreaks and other events occur or re-occur, our business, financial condition, results of operations and cash flows may be materially adversely affected.

Global climate change may have an adverse effect on our financial results.

Our insurance policies are generally written for one year and repriced annually to reflect changing exposures. However, assessing the risk of loss and damage associated with the adverse effects of climate change and the range of approaches to address loss and damage associated with the adverse effects of climate change, including impacts related to extreme weather events and slow onset events, remains a challenge and may adversely impact our business, financial condition and results of operations.

Risks Related to Market Conditions

Adverse economic factors, including recession, inflation, periods of high unemployment or lower economic activity could result in the sale of fewer policies than expected or an increase in frequency or severity of claims and premium defaults or both, which, in turn, could affect our growth and profitability.

Factors, such as business revenue, economic conditions, the volatility and strength of the capital markets and inflation can affect the business and economic environment. These same factors affect our ability to generate revenue and profits. In an economic downturn that is characterized by higher unemployment, declining spending and reduced corporate revenues, the demand for insurance products is generally adversely affected, which directly affects our premium levels and profitability. Negative economic factors may also affect our ability to receive the appropriate rate for the risk we insure with our policyholders and may adversely affect the number of policies we can write, including with respect to our opportunities to underwrite profitable business. In an economic downturn, our customers may have less need for insurance coverage, cancel existing insurance policies, modify their coverage or not renew the policies they hold with us. Existing policyholders may exaggerate or even falsify claims to obtain higher claims payments. These outcomes would reduce our underwriting profit to the extent these factors are not reflected in the rates we charge.

We underwrite a significant portion of our insurance in California, Texas and Florida. Any economic downturn in any such state could have an adverse effect on our business, financial condition and results of operations.

A decline in our financial strength rating may adversely affect the amount of business we write.

Participants in the insurance industry use ratings from independent ratings agencies, such as A.M. Best, as an important means of assessing the financial strength and quality of insurers. In setting its ratings, A.M. Best uses a quantitative and qualitative analysis of a company’s balance sheet strength, operating performance and business profile. This analysis includes comparisons to peers and industry standards as well as assessments of operating plans, philosophy and management. A.M. Best financial strength ratings range from "A++" (Superior) to "F" for insurance companies that have been publicly placed in liquidation. As of the date of this Annual Report on Form 10-K, A.M. Best has assigned a financial strength rating of "A" (Excellent) to our operating subsidiary, Kinsale Insurance. A.M. Best assigns ratings that are intended to provide an independent opinion of an insurance company’s ability to meet its obligations to policyholders and such ratings are not evaluations directed to investors and are not a recommendation to buy, sell or hold our common stock or any other securities we may issue. A.M. Best periodically reviews our financial strength rating and may revise it downward or revoke it at its sole discretion based primarily on its analysis of our balance sheet strength (including capital adequacy and loss adjustment expense reserve adequacy), operating performance and business profile. Factors that could affect such analysis include but are not limited to:

•if we change our business practices from our organizational business plan in a manner that no longer supports A.M. Best’s rating;

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•if unfavorable financial, regulatory or market trends affect us, including excess market capacity;

•if our losses exceed our loss reserves;

•if we have unresolved issues with government regulators;

•if we are unable to retain our senior management or other key personnel;

•if our investment portfolio incurs significant losses; or

•if A.M. Best alters its capital adequacy assessment methodology in a manner that would adversely affect our rating.

These and other factors could result in a downgrade of our financial strength rating. A downgrade or withdrawal of our rating could result in any of the following consequences, among others:

•causing our current and future brokers and insureds to choose other, more highly-rated competitors;

•increasing the cost or reducing the availability of reinsurance to us; or

•severely limiting or preventing us from writing new and renewal insurance contracts.

In addition, in view of the earnings and capital pressures recently experienced by many financial institutions, including insurance companies, it is possible that rating organizations will heighten the level of scrutiny that they apply to such institutions, will increase the frequency and scope of their credit reviews, will request additional information from the companies that they rate or will increase the capital and other requirements employed in the rating organizations’ models for maintenance of certain ratings levels. We can offer no assurance that our rating will remain at its current level. It is possible that such reviews of us may result in adverse ratings consequences, which could have a material adverse effect on our business, financial condition and results of operations.

We could be adversely affected by the loss of one or more key executives or by an inability to attract and retain qualified personnel.

We depend on our ability to attract and retain experienced personnel and seasoned key executives who are knowledgeable about our business. The pool of talent from which we actively recruit is limited and may fluctuate based on market dynamics specific to our industry and independent of overall economic conditions. As such, higher demand for employees having the desired skills and expertise could lead to increased compensation expectations for existing and prospective personnel, making it difficult for us to retain and recruit key personnel and maintain labor costs at desired levels. Only our Chief Executive Officer has an employment agreement with us and is subject to a non-compete agreement. Should any of our key executives terminate their employment with us, or if we are unable to retain and attract talented personnel, we may be unable to maintain our current competitive position in the specialized markets in which we operate, which could adversely affect our results of operations.

We rely on a select group of brokers, and such relationships may not continue.

We distribute the majority of our products through a select group of brokers. Of our 2020 gross written premiums, 46.1%, or $255.0 million, were distributed through five of our approximately 167 brokers, three of which accounting for 34.8%, or $192.3 million, of our 2020 gross written premiums.

Our relationship with any of these brokers may be discontinued at any time. Even if the relationships do continue, they may not be on terms that are profitable for us. The termination of a relationship with one or more significant brokers could result in lower gross written premiums and could have a material adverse effect on our results of operations or business prospects.

Our E&S insurance operations are subject to increased risk from changing market conditions and our business is cyclical in nature, which may affect our financial performance.

E&S insurance covers risks that are typically more complex and unusual than standard risks and require a high degree of specialized underwriting. As a result, E&S risks do not often fit the underwriting criteria of standard insurance carriers, and are generally considered higher risk than those covered in the standard market. If our underwriting staff inadequately

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judges and prices the risks associated with the business underwritten in the E&S market, our financial results could be adversely impacted.

Historically, the financial performance of the P&C insurance industry has tended to fluctuate in cyclical periods of price competition and excess capacity (known as a soft market) followed by periods of high premium rates and shortages of underwriting capacity (known as a hard market). Soft markets occur when the supply of insurance capital in a given market or territory is greater than the amount of insurance coverage demanded by all potential insureds in that market. When this occurs, insurance prices tend to decline and policy terms and conditions become more favorable to the insureds. Conversely, hard markets occur when there is not enough insurance capital capacity in the market to meet the needs of potential insureds, causing insurance prices to generally rise and policy terms and conditions to become more favorable to the insurers.

Although an individual insurance company's financial performance depends on its own specific business characteristics, the profitability of most P&C insurance companies tends to follow this cyclical market pattern. Further, this cyclical market pattern can be more pronounced in the E&S market than in the standard insurance market. When the standard insurance market hardens, the E&S market hardens, and growth in the E&S market can be significantly more rapid than growth in the standard insurance market. Similarly, when conditions begin to soften, many customers that were previously driven into the E&S market may return to the admitted market, exacerbating the effects of rate decreases. We cannot predict the timing or duration of changes in the market cycle because the cyclicality is due in large part to the actions of our competitors and general economic factors. These cyclical patterns cause our revenues and net income to fluctuate, which may cause the price of our common stock to be volatile.

Our employees could take excessive risks, which could negatively affect our financial condition and business.

As an insurance enterprise, we are in the business of binding certain risks. The employees who conduct our business, including executive officers and other members of management, underwriters, product managers and other employees, do so in part by making decisions and choices that involve exposing us to risk. These include decisions such as setting underwriting guidelines and standards, product design and pricing, determining which business opportunities to pursue and other decisions. We endeavor, in the design and implementation of our compensation programs and practices, to avoid giving our employees incentives to take excessive risks. Employees may, however, take such risks regardless of the structure of our compensation programs and practices. Similarly, although we employ controls and procedures designed to monitor employees’ business decisions and prevent them from taking excessive risks, these controls and procedures may not be effective. If our employees take excessive risks, the impact of those risks could have a material adverse effect on our financial condition and business operations.

Competition for business in our industry is intense.

We face competition from other specialty insurance companies, standard insurance companies and underwriting agencies, as well as from diversified financial services companies that are larger than we are and that have greater financial, marketing and other resources than we do. Some of these competitors also have longer experience and more market recognition than we do in certain lines of business. In addition, it may be difficult or prohibitively expensive for us to implement technology systems and processes that are competitive with the systems and processes of these larger companies.

In particular, competition in the insurance industry is based on many factors, including price of coverage, the general reputation and perceived financial strength of the company, relationships with brokers, terms and conditions of products offered, ratings assigned by independent rating agencies, speed of claims payment and reputation, and the experience and reputation of the members of our underwriting team in the particular lines of insurance and reinsurance we seek to underwrite. See "Business — Competition." In recent years, the insurance industry has undergone increasing consolidation, which may further increase competition.

A number of new, proposed or potential legislative or industry developments could further increase competition in our industry. These developments include:

•An increase in capital-raising by companies in our lines of business, which could result in new entrants to our markets and an excess of capital in the industry;

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•The deregulation of commercial insurance lines in certain states and the possibility of federal regulatory reform of the insurance industry, which could increase competition from standard carriers; and

•Changing practices caused by the internet, including shifts in the way in which E&S insurance is purchased. We currently depend largely on the wholesale distribution model. If the wholesale distribution model were to be significantly altered by changes in the way E&S insurance were marketed, including, without limitation, through use of the internet, it could have a material adverse effect on our premiums, underwriting results and profits.

We may not be able to continue to compete successfully in the insurance markets. Increased competition in these markets could result in a change in the supply and demand for insurance, affect our ability to price our products at risk-adequate rates and retain existing business, or underwrite new business on favorable terms. If this increased competition so limits our ability to transact business, our operating results could be adversely affected.

If we are unable to underwrite risks accurately and charge competitive yet profitable rates to our policyholders, our business, financial condition and results of operations will be adversely affected.

In general, the premiums for our insurance policies are established at the time a policy is issued and, therefore, before all of our underlying costs are known. Like other insurance companies, we rely on estimates and assumptions in setting our premium rates. Establishing adequate premium rates is necessary, together with investment income, to generate sufficient revenue to offset losses, loss adjustment expenses and other underwriting costs and to earn a profit. If we do not accurately assess the risks that we assume, we may not charge adequate premiums to cover our losses and expenses, which would adversely affect our results of operations and our profitability. Alternatively, we could set our premiums too high, which could reduce our competitiveness and lead to lower revenues. Pricing involves the acquisition and analysis of historical loss data and the projection of future trends, loss costs and expenses, and inflation trends, among other factors, for each of our products in multiple risk tiers and many different markets. In order to accurately price our policies, we must:

•collect and properly analyze a substantial volume of data from our insureds;

•develop, test and apply appropriate actuarial projections and ratings formulas;

•closely monitor and timely recognize changes in trends; and

•project both frequency and severity of our insureds’ losses with reasonable accuracy.

We seek to implement our pricing accurately in accordance with our assumptions. Our ability to undertake these efforts successfully and, as a result, accurately price our policies, is subject to a number of risks and uncertainties, including:

•insufficient or unreliable data;

•incorrect or incomplete analysis of available data;

•uncertainties generally inherent in estimates and assumptions;

•our failure to implement appropriate actuarial projections and ratings formulas or other pricing methodologies;

•regulatory constraints on rate increases;

•our failure to accurately estimate investment yields and the duration of our liability for loss and loss adjustment expenses; and

•unanticipated court decisions, legislation or regulatory action.

Because our business depends on insurance brokers, we are exposed to certain risks arising out of our reliance on these distribution channels that could adversely affect our results.

Certain premiums from policyholders, where the business is produced by brokers, are collected directly by the brokers and forwarded to our insurance subsidiary. In certain jurisdictions, when the insured pays its policy premium to its broker for payment on behalf of our insurance subsidiary, the premium might be considered to have been paid under applicable insurance laws and regulations. Accordingly, the insured would no longer be liable to us for those amounts, whether or not we have actually received the premium from that broker. Consequently, we assume a degree of credit risk associated with the brokers with whom we work. Where necessary, we review the financial condition of potential new brokers before

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we agree to transact business with them. Although the failure by any of our brokers to remit premiums to us has not been material to date, there may be instances where our brokers collect premiums but do not remit them to us and we may be required under applicable law to provide the coverage set forth in the policy despite the absence of related premiums being paid to us.

Because the possibility of these events occurring depends in large part on the financial condition and internal operations of our brokers, we monitor broker behavior and review financial information on an as-needed basis. If we are unable to collect premiums from our brokers in the future, our underwriting profits may decline and our financial condition and results of operations could be materially and adversely affected.

We are subject to reinsurance counterparty credit risk.

Although reinsurance makes the reinsurer liable to us to the extent the risk is transferred or ceded to the reinsurer, it does not relieve us (the ceding insurer) of our primary liability to our policyholders. Our reinsurers may not pay claims made by us on a timely basis, or they may not pay some or all of these claims. For example, reinsurers may default in their financial obligations to us as the result of insolvency, lack of liquidity, operational failure, fraud, asserted defenses based on agreement wordings or the principle of utmost good faith, asserted deficiencies in the documentation of agreements or other reasons. Any disputes with reinsurers regarding coverage under reinsurance contracts could be time consuming, costly and uncertain of success. We evaluate each reinsurance claim based on the facts of the case, historical experience with the reinsurer on similar claims and existing case law and include any amounts deemed uncollectible from the reinsurer in our reserve for uncollectible reinsurance. As of December 31, 2020, we had $117.5 million of aggregate reinsurance balances on paid and unpaid losses and ceded unearned premiums. These risks could cause us to incur increased net losses, and, therefore, adversely affect our financial condition.

We may act based on inaccurate or incomplete information regarding the accounts we underwrite.

We rely on information provided by insureds or their representatives when underwriting insurance policies. While we may make inquiries to validate or supplement the information provided, we may make underwriting decisions based on incorrect or incomplete information. It is possible that we will misunderstand the nature or extent of the activities or facilities and the corresponding extent of the risks that we insure because of our reliance on inadequate or inaccurate information.

The failure of our information technology and telecommunications systems could adversely affect our business.

Our business depends on our information technology and telecommunications systems, including our browser-based underwriting system. Among other things, we rely on these systems to interact with brokers and insureds, to underwrite business, to prepare policies and process premiums, to perform actuarial and other modeling functions, to process claims and make claims payments and to prepare internal and external financial statements and information. In addition, some of these systems include or rely on third-party systems not located on our premises or under our control. Events such as natural catastrophes, terrorist attacks, industrial accidents, third-party system or network outages or computer malware may cause our systems to fail or be inaccessible for extended periods of time. While we have implemented business contingency and other plans to protect our systems, sustained or repeated system failures or service denials could severely limit our ability to write and process new and renewal business, provide customer service, pay claims in a timely manner or otherwise operate in the ordinary course of business.

Our operations depend on the reliable and secure processing, storage and transmission of confidential and other data and information in our computer systems and networks. Computer malware, hackers, employee misconduct and other external hazards could expose our systems to security breaches, cyber-attacks or other disruptions. In addition, we routinely transmit and receive personal, personally identifiable, sensitive, confidential and proprietary data by electronic means and are subject to data privacy laws and regulations enacted in the jurisdictions in which we do business.

While we have implemented security measures designed to protect against breaches of security and other interference with our systems and networks, our systems and networks may be subject to breaches or interference. Any such event may result in operational disruptions as well as unauthorized access to or the disclosure or loss of our proprietary information or our customers’ data and information, which in turn may result in legal claims, regulatory scrutiny and liability, the incurrence of costs to eliminate or mitigate further exposure, the loss of customers or affiliated advisors, reputational harm

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or other damage to our business. In addition, the trend toward general public notification of such incidents could exacerbate the harm to our business, financial condition and results of operations. Even if we successfully protect our technology infrastructure and the confidentiality of sensitive data, we could suffer harm to our business and reputation if attempted security breaches are publicized. We cannot be certain that advances in criminal capabilities, discovery of new vulnerabilities, attempts to exploit vulnerabilities in our systems, data thefts, physical system or network break-ins or inappropriate access, or other developments will not compromise or breach the technology or other security measures protecting the networks and systems used in connection with our business.

We employ third-party and open source licensed software for use in our business, and the inability to maintain these licenses, errors in the software we license or the terms of open source licenses could result in increased costs, or reduced service levels, which would adversely affect our business.

Our business relies on certain third-party software obtained under licenses from other companies. We anticipate that we will continue to rely on such third-party software in the future. Although we believe that there are commercially reasonable alternatives to the third-party software we currently license, this may not always be the case, or it may be difficult or costly to replace. In addition, integration of new third-party software may require significant work and require substantial investment of our time and resources. Our use of additional or alternative third-party software would require us to enter into license agreements with third parties, which may not be available on commercially reasonable terms or at all. Many of the risks associated with the use of third-party software cannot be eliminated, and these risks could negatively affect our business.

Additionally, the software powering our technology systems incorporates software covered by open source licenses. The terms of many open source licenses have not been interpreted by U.S. courts and there is a risk that the licenses could be construed in a manner that imposes unanticipated conditions or restrictions on our ability to operate our systems. In the event that portions of our proprietary software are determined to be subject to an open source license, we could be required to publicly release the affected portions of our source code or re-engineer all or a portion of our technology systems, each of which could reduce or eliminate the value of our technology systems. Such risk could be difficult or impossible to eliminate and could adversely affect our business, financial condition and results of operations.

Any cloud provider service failure or control weakness could adversely affect our business.

We employ cloud-based services to host our applications and intend to expand our use. As we expand our use of cloud-based services, we will increasingly rely on third-party cloud providers to maintain appropriate controls and safeguards to protect confidential information we receive, including personal, personally identifiable, sensitive, confidential or proprietary data, and the integrity and continuous operation of our proprietary technology platform. While we conduct due diligence on these cloud providers with respect to their security and business controls, we may not have the visibility to effectively monitor the implementation and efficacy of these controls. Outside parties may be able to circumvent controls or exploit vulnerabilities, resulting in operational disruption, data loss, defects or a security event. Migrating to the cloud increases the risk of operational disruption should internet service be interrupted. While we have implemented business contingency and other plans to facilitate continuous internet access, sustained or concurrent service denials or similar failures could limit our ability to write and process new and renewal business, provide customer service, pay claims in a timely manner or otherwise operate our business. Any such event or failure could have a material adverse effect on our business, financial condition and results of operations.

We may change our underwriting guidelines or our strategy without stockholder approval.

Our management has the authority to change our underwriting guidelines or our strategy without notice to our stockholders and without stockholder approval. As a result, we may make fundamental changes to our operations without stockholder approval, which could result in our pursuing a strategy or implementing underwriting guidelines that may be materially different from the strategy or underwriting guidelines described in the section titled "Business" or elsewhere in this Annual Report on Form 10-K.

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If actual renewals of our existing contracts do not meet expectations, our written premiums in future years and our future results of operations could be materially adversely affected.

Many of our contracts are written for a one-year term. In our financial forecasting process, we make assumptions about the rates of renewal of our prior year’s contracts. The insurance and reinsurance industries have historically been cyclical businesses with intense competition, often based on price. If actual renewals do not meet expectations or if we choose not to write a renewal because of pricing conditions, our written premiums in future years and our future operations would be materially adversely affected.

Our failure to accurately and timely pay claims could materially and adversely affect our business, financial condition, results of operations and prospects.

We must accurately and timely evaluate and pay claims that are made under our policies. Many factors affect our ability to pay claims accurately and timely, including the training and experience of our claims representatives, our claims organization’s culture and the effectiveness of our management, our ability to develop or select and implement appropriate procedures and systems to support our claims functions and other factors. Our failure to pay claims accurately and timely could lead to regulatory and administrative actions or material litigation, undermine our reputation in the marketplace and materially and adversely affect our business, financial condition, results of operations and prospects.

In addition, if we do not train new claims employees effectively or if we lose a significant number of experienced claims employees, our claims department’s ability to handle an increasing workload could be adversely affected. In addition to potentially requiring that growth be slowed in the affected markets, our business could suffer from decreased quality of claims work which, in turn, could adversely affect our operating margins.

The effects of litigation on our business are uncertain and could have an adverse effect on our business.

As is typical in our industry, we continually face risks associated with litigation of various types, including disputes relating to insurance claims under our policies as well as other general commercial and corporate litigation. Although we are not currently involved in any material litigation with our customers, other members of the insurance industry are the target of class action lawsuits and other types of litigation, some of which involve claims for substantial or indeterminate amounts, and the outcomes of which are unpredictable. This litigation may be based on a variety of issues, including insurance and claim settlement practices. We cannot predict with any certainty whether we will be involved in such litigation in the future or what impact such litigation would have on our business.

Risks Related to Our Investment Portfolio

Performance of our investment portfolio is subject to a variety of investment risks that may adversely affect our financial results.

Our results of operations depend, in part, on the performance of our investment portfolio. We seek to hold a high-quality, diversified portfolio of investments that is managed by professional investment advisory management firms in accordance with our investment policy and routinely reviewed by our Investment Committee. However, our investments are subject to general economic conditions and market risks as well as risks inherent to particular securities.

Our primary market risk exposures are to changes in interest rates and equity prices. See "Management's Discussion and Analysis of Financial Condition and Results of Operation — Quantitative and Qualitative Disclosures About Market Risk." In recent years, interest rates have been at or near historic lows. A protracted low interest rate environment would continue to place pressure on our net investment income, particularly as it relates to fixed-maturity securities and short-term investments, which, in turn, may adversely affect our operating results. Future increases in interest rates could cause the values of our fixed-maturity securities portfolios to decline, with the magnitude of the decline depending on the duration of securities included in our portfolio and the amount by which interest rates increase. Some fixed-maturity securities have call or prepayment options, which create possible reinvestment risk in declining rate environments. Other fixed-maturity securities, such as mortgage-backed and asset-backed securities, carry prepayment risk or, in a rising interest rate environment, may not prepay as quickly as expected.

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The value of our investment portfolio is subject to the risk that certain investments may default or become impaired due to deterioration in the financial condition of one or more issuers of the securities we hold, or due to deterioration in the financial condition of an insurer that guarantees an issuer’s payments on such investments. Downgrades in the credit ratings of fixed maturities also have a significant negative effect on the market valuation of such securities.

Such factors could reduce our net investment income and result in realized investment losses. Our investment portfolio is subject to increased valuation uncertainties when investment markets are illiquid. The valuation of investments is more subjective when markets are illiquid, thereby increasing the risk that the estimated fair value (i.e., the carrying amount) of the securities we hold in our portfolio does not reflect prices at which actual transactions would occur.

We also invest in marketable equity securities. These securities are carried on the consolidated balance sheet at fair value and are subject to potential losses and declines in value, which may never recover. Our equity investments totaled $129.7 million as of December 31, 2020.

Risks for all types of securities are managed through the application of our investment policy, which establishes investment parameters that include but are not limited to, maximum percentages of investment in certain types of securities and minimum levels of credit quality, which we believe are within applicable guidelines established by the NAIC and the Arkansas State Insurance Department.

Although we seek to preserve our capital, we cannot be certain that our investment objectives will be achieved, and results may vary substantially over time. In addition, although we seek to employ investment strategies that are not correlated with our insurance and reinsurance exposures, losses in our investment portfolio may occur at the same time as underwriting losses and, therefore, exacerbate the adverse effect of the losses on us.

Risks Related to Liquidity and Access to Capital

Because we are a holding company and substantially all of our operations are conducted by our insurance subsidiary, our ability to pay dividends depends on our ability to obtain cash dividends or other permitted payments from our insurance subsidiary.

Because we are a holding company with no business operations of our own, our ability to pay dividends to stockholders largely depends on dividends and other distributions from our insurance subsidiary, Kinsale Insurance. State insurance laws, including the laws of Arkansas, restrict the ability of Kinsale Insurance to declare stockholder dividends. State insurance regulators require insurance companies to maintain specified levels of statutory capital and surplus. Consequently, the maximum dividend distribution is limited by Arkansas law to the greater of 10% of policyholder surplus as of December 31 of the previous year or net income, not including realized capital gains, for the previous calendar year. Dividend payments are further limited to that part of available policyholder surplus which is derived from net profits on our business. The maximum amount of dividends Kinsale Insurance could pay us during 2021 without regulatory approval is $51.8 million. State insurance regulators have broad powers to prevent the reduction of statutory surplus to inadequate levels, and there is no assurance that dividends up to the maximum amounts calculated under any applicable formula would be permitted. Moreover, state insurance regulators that have jurisdiction over the payment of dividends by our insurance subsidiary may in the future adopt statutory provisions more restrictive than those currently in effect.

The declaration and payment of future dividends to holders of our common stock will be at the discretion of our Board of Directors and will depend on many factors. See "Dividend Policy."

We could be forced to sell investments to meet our liquidity requirements.

We invest the premiums we receive from our insureds until they are needed to pay policyholder claims. Consequently, we seek to manage the duration of our investment portfolio based on the duration of our loss and loss adjustment expense reserves to ensure sufficient liquidity and avoid having to liquidate investments to fund claims. Risks such as inadequate loss and loss adjustment reserves or unfavorable trends in litigation could potentially result in the need to sell investments to fund these liabilities. We may not be able to sell our investments at favorable prices or at all. Sales could result in significant realized losses depending on the conditions of the general market, interest rates and credit issues with individual securities.

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We may require additional capital in the future, which may not be available or may only be available on unfavorable terms.

Our future capital requirements depend on many factors, including our ability to write new business successfully and to establish premium rates and reserves at levels sufficient to cover losses. Many factors will affect the amount and timing of our capital needs, including our growth rate and profitability, our claims experience, and the availability of reinsurance, market disruptions and other unforeseeable developments. If we need to raise additional capital, equity or debt financing may not be available at all or may be available only on terms that are not favorable to us. In the case of equity financings, dilution to our stockholders could result. In the case of debt financings, we may be subject to covenants that restrict our ability to freely operate our business. In any case, such securities may have rights, preferences and privileges that are senior to those of the shares of common stock currently outstanding. If we cannot obtain adequate capital on favorable terms or at all, we may not have sufficient funds to implement our operating plans and our business, financial condition or results of operations could be materially adversely affected.

Risks Related to Regulation

We are subject to extensive regulation, which may adversely affect our ability to achieve our business objectives. In addition, if we fail to comply with these regulations, we may be subject to penalties, including fines and suspensions, which may adversely affect our financial condition and results of operations.

Our insurance subsidiary, Kinsale Insurance, is subject to extensive regulation in Arkansas, its state of domicile, and to a lesser degree, the other states in which it operates. Most insurance regulations are designed to protect the interests of insurance policyholders, as opposed to the interests of investors or stockholders. These regulations generally are administered by a department of insurance in each state and relate to, among other things, authorizations to write E&S lines of business, capital and surplus requirements, investment and underwriting limitations, affiliate transactions, dividend limitations, changes in control, solvency and a variety of other financial and non-financial aspects of our business. Significant changes in these laws and regulations could further limit our discretion or make it more expensive to conduct our business. State insurance regulators also conduct periodic examinations of the affairs of insurance companies and require the filing of annual and other reports relating to financial condition, holding company issues and other matters. These regulatory requirements may impose timing and expense constraints that could adversely affect our ability to achieve some or all of our business objectives.

In addition, state insurance regulators have broad discretion to deny or revoke licenses for various reasons, including the violation of regulations. In some instances, where there is uncertainty as to applicability, we follow practices based on our interpretations of regulations or practices that we believe generally to be followed by the industry. These practices may turn out to be different from the interpretations of regulatory authorities. If we do not have the requisite licenses and approvals or do not comply with applicable regulatory requirements, state insurance regulators could preclude or temporarily suspend us from carrying on some or all of our activities or could otherwise penalize us. This could adversely affect our ability to operate our business. Further, changes in the level of regulation of the insurance industry or changes in laws or regulations themselves or interpretations by regulatory authorities could interfere with our operations and require us to bear additional costs of compliance, which could adversely affect our ability to operate our business.

The NAIC has adopted a system to test the adequacy of statutory capital of insurance companies, known as "risk-based capital." This system establishes the minimum amount of risk-based capital necessary for a company to support its overall business operations. It identifies P&C insurers that may be inadequately capitalized by looking at certain inherent risks of each insurer's assets and liabilities and its mix of net written premiums. Insurers falling below a calculated threshold may be subject to varying degrees of regulatory action, including supervision, rehabilitation or liquidation. Failure to maintain our risk-based capital at the required levels could adversely affect the ability of our insurance subsidiary to maintain regulatory authority to conduct our business. See also "Regulation — Required licensing."

We may become subject to additional government or market regulation.

Our business could be adversely affected by changes in state laws, including those relating to asset and reserve valuation requirements, surplus requirements, limitations on investments and dividends, enterprise risk and risk-based capital requirements and, at the federal level, by laws and regulations that may affect certain aspects of the insurance industry,

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including proposals for preemptive federal regulation. The U.S. federal government generally has not directly regulated the insurance industry except for certain areas of the market, such as insurance for flood, nuclear and terrorism risks. However, the federal government has undertaken initiatives or considered legislation in several areas that may affect the insurance industry, including tort reform, corporate governance and the taxation of reinsurance companies.

The Dodd-Frank Act also established the FIO and vested the FIO with the authority to monitor all aspects of the insurance sector, including to monitor the extent to which traditionally underserved communities and consumers have access to affordable non-health insurance products. In addition, the FIO has the ability to recommend to the Financial Stability Oversight Council the designation of an insurer as "systemically significant" and therefore subject to regulation by the Federal Reserve as a bank holding company. Any additional regulations established as a result of the Dodd-Frank Act could increase our costs of compliance or lead to disciplinary action. In addition, legislation has been introduced from time to time that, if enacted, could result in the federal government assuming a more direct role in the regulation of the insurance industry, including federal licensing in addition to or in lieu of state licensing and requiring reinsurance for natural catastrophes. We are unable to predict whether any legislation will be enacted or any regulations will be adopted, or the effect any such developments could have on our business, financial condition or results of operations.

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Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

We own our executive and insurance offices located in Richmond, Virginia, and we currently occupy approximately 70,000 square feet of the 137,000 square feet of available office space.

We believe that our facilities are adequate for our current needs.

Item 3. Legal Proceedings

We are subject to legal proceedings in the normal course of operating our insurance business. We are not involved in any legal proceedings which reasonably could be expected to have a material adverse effect on our business, results of operations or financial condition.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Price for Common Stock

Our common stock began trading on the Nasdaq Global Select Market ("Nasdaq") under the symbol "KNSL" on July 28, 2016. Before then, there was no public market for our common stock. As of February 18, 2021, we had 90 stockholders of record of our common stock.

Dividend Policy

We currently expect to pay quarterly cash dividends in the future; however, the declaration, payment and amount of future dividends is subject to the discretion of our Board of Directors. Our Board of Directors give consideration to various risks and uncertainties, including those discussed under the headings "Risk Factors" and "Management’s Discussion and Analysis of Financial Condition and Results of Operations" and elsewhere in this Annual Report on Form 10-K when determining whether to declare and pay dividends, as well as the amount thereof. Our Board of Directors may take into account a variety of factors when determining whether to declare any dividends, including (1) our financial condition, liquidity, results of operations (including our ability to generate cash flow in excess of expenses and our expected or actual net income), retained earnings and capital requirements, (2) general business conditions, (3) legal, tax and regulatory limitations, (4) contractual prohibitions and other restrictions, (5) the effect of a dividend or dividends on our financial strength ratings and (6) any other factors that our Board of Directors deem relevant.

Our status as a holding company and a legal entity separate and distinct from our subsidiaries affects our ability to pay dividends and make other payments. As a holding company without significant operations of our own, the principal sources of our funds are dividends and other payments from our subsidiaries. The ability of our insurance subsidiary to pay dividends to us is subject to limits under insurance laws of the state in which our insurance subsidiary is domiciled. See "Risk Factors – Risks Related to Our Business and Our Industry – Because we are a holding company and substantially all of our operations are conducted by our insurance subsidiary, our ability to pay dividends and service our debt obligations depends on our ability to obtain cash dividends or other permitted payments from our insurance subsidiary" and "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources."

Performance Graph

The following performance graph compares the cumulative total shareholder return of an investment in (1) our common stock, (2) the cumulative total returns to the Nasdaq Composite Index and (3) the cumulative total returns to the Nasdaq Insurance Index, for the period from July 28, 2016 (the date our common stock began trading on Nasdaq) through December 31, 2020.

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The graph assumes an initial investment of $100 and the reinvestment of dividends, if any. Such returns are based on historical results and are not indicative of future performance.

	July 28, 2016		December 31, 2016		December 31, 2017		December 31, 2018		December 31, 2019		December 31, 2020
Kinsale Capital Group, Inc.	$	100.00	$	186.12	$	247.91	$	307.63	$	565.00	$	1,114.63
Nasdaq Composite Index	$	100.00	$	105.01	$	136.14	$	132.27	$	180.80	$	262.02
Nasdaq Insurance Index	$	100.00	$	114.29	$	133.66	$	126.11	$	152.18	$	151.31

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Item 6. Selected Consolidated Financial and Other Data

The following tables present our selected consolidated financial and other data, at the dates and for the periods indicated. The selected consolidated financial and other data set forth below as of and for the years ended December 31, 2020, 2019, 2018, 2017 and 2016 have been derived from our audited consolidated financial statements for those years.

These historical results are not necessarily indicative of the results that may be expected for any future period. The following information is only a summary and should be read in conjunction with the section entitled "Management’s Discussion and Analysis of Financial Condition and Results of Operations" and our consolidated financial statements and the accompanying notes included elsewhere in this Annual Report on Form 10-K.

	Year Ended December 31,
	2020		2019		2018		2017		2016
	($ in thousands, except for per share data)
Revenues:
Gross written premiums	$	552,814	$	389,694	$	275,538	$	223,191	$	188,478
Ceded written premiums(1)	(74,595)		(47,633)		(39,924)		(33,719)		(21,214)
Net written premiums	$	478,219	$	342,061	$	235,614	$	189,472	$	167,264
Net earned premiums	$	412,754	$	282,981	$	212,688	$	176,053	$	133,816
Net investment income	26,110		20,133		15,688		10,569		7,487
Net investment gains (losses)(2)	20,388		12,748		(6,274)		151		176
Other income	634		26		12		3		136
Total revenues	459,886		315,888		222,114		186,776		141,615
Expenses:
Losses and loss adjustment expenses(1)	263,802		169,563		128,041		103,680		70,961
Underwriting, acquisition and insurance expenses(1)	94,296		70,217		53,425		44,146		28,551
Other expenses	1,375		57		168		429		2,567
Total expenses	359,473		239,837		181,634		148,255		102,079
Income before income taxes	100,413		76,051		40,480		38,521		39,536
Income tax expense(3)	11,994		12,735		6,693		13,620		13,369
Net income	$	88,419	$	63,316	$	33,787	$	24,901	$	26,167
Underwriting income(4)	$	54,656	$	43,201	$	31,222	$	28,227	$	34,304
Per common share data:
Basic earnings per share:
Common stock	$	3.96	$	2.94	$	1.60	$	1.19	$	0.57
Class A common stock(5)	—		—		—		—		0.98
Class B common stock(5)	—		—		—		—		0.48
Diluted earnings per share:
Common stock	$	3.87	$	2.86	$	1.56	$	1.16	$	0.56
Class A common stock(5)	—		—		—		—		0.98
Class B common stock(5)	—		—		—		—		0.46
Cash dividends declared and paid	0.36		0.32		0.28		0.24		0.10

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	At December 31,
	2020			2019			2018			2017			2016
	($ in thousands)
Balance sheet data:
Cash and invested assets	$	1,288,555		$	908,234		$	643,051		$	561,070		$	480,349
Premiums receivable, net	48,641			34,483			24,253			19,787			16,984
Reinsurance recoverables, net(1)	93,215			72,574			56,788			49,593			70,317
Ceded unearned premiums(1)	24,265			16,118			16,072			13,858			13,512
Intangible assets	3,538			3,538			3,538			3,538			3,538
Total assets	1,546,896			1,090,550			773,063			667,849			614,389
Reserves for unpaid losses and loss adjustment expenses	636,013			460,058			369,152			315,717			264,801
Unearned premiums	260,986			187,374			128,250			103,110			89,344
Funds held for reinsurers(1)	—			—			—			—			36,497
Debt	42,570			16,744			—			—			—
Total liabilities	970,658			684,670			509,077			429,660			404,175
Total stockholders' equity	576,238			405,880			263,986			238,189			210,214
Other data:
Tangible stockholders' equity(6)	$	573,443		$	403,085		$	261,191		$	235,394		$	207,914
Debt to total capitalization ratio(7)	6.9		%	4.1		%	—		%	—		%	—		%
Statutory capital and surplus(8)	$	476,066		$	348,811		$	233,500		$	213,833		$	193,387

	Year Ended December 31,
	2020		2019		2018		2017		2016
Underwriting and other ratios:
Loss ratio(9)	63.9	%	59.9	%	60.2	%	58.9	%	53.0	%
Expense ratio(10)	22.8	%	24.8	%	25.1	%	25.1	%	21.3	%
Combined ratio(11)	86.7	%	84.7	%	85.3	%	84.0	%	74.3	%
Adjusted loss ratio(12)	NA		NA		NA		NA		50.0	%
Adjusted expense ratio(12)	NA		NA		NA		NA		26.8	%
Adjusted combined ratio(12)	NA		NA		NA		NA		76.8	%
Return on equity(13)	18.0	%	18.9	%	13.5	%	11.1	%	16.2	%
Operating return on equity(14)	14.7	%	15.9	%	15.4	%	11.9	%	16.1	%

(1) Prior to our IPO in 2016, a significant amount of our business was reinsured through our multi-line quota-share reinsurance treaty ("MLQS") with third-party reinsurers. The MLQS transferred a portion of the risk related to certain lines of business written by us to reinsurers in exchange for a portion of the gross written premiums on that business. Effective January 1, 2017, the Company commuted the remaining outstanding MLQS covering the period January 1, 2015 to December 31, 2015, which reduced reinsurance recoverables on unpaid losses by approximately $27.9 million. The commutation did not have any effect on the Company's results of operations or cash flows for the applicable period.

(2) Effective January 1, 2018, we adopted ASU 2016-01, which eliminated the available-for-sale classification for equity securities and required changes in unrealized gains and losses in fair value of these investments to be recognized in net income.

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(3) During the fourth quarter of 2017, the Tax Cuts and Jobs Act of 2017 (the "TCJA") was enacted, which lowered the federal corporate tax rate from 35% to 21% starting January 1, 2018. As a result of the TCJA enactment, deferred tax balances were remeasured to reflect the lower rate, which resulted in charge to tax expense of $1.9 million for the year ended December 31, 2017.

(4) Underwriting income is a non-GAAP financial measure. See "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income to underwriting income.

(5) In connection with the IPO, the Company amended and restated its certificate of incorporation, which reclassified the Company’s former Class A Common Stock and Class B Common Stock into a single class of common stock.

(6) Tangible stockholders’ equity is a non-GAAP financial measure. See "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Financial Condition" for a reconciliation of stockholders’ equity to tangible stockholders’ equity.

(7) The debt to total capitalization ratio is the ratio, expressed as a percentage, of total indebtedness for borrowed money, including financing leases, to the sum of total indebtedness for borrowed money, including financing leases if any, and stockholders’ equity.

(8) Statutory and surplus capital is the excess of assets over liabilities for our insurance subsidiary, as determined in accordance with statutory accounting principles prescribed by the NAIC.

(9) The loss ratio is the ratio, expressed as a percentage, of losses and loss adjustment expenses to net earned premiums, net of the effects of reinsurance.

(10) The expense ratio is the ratio, expressed as a percentage, of underwriting, acquisition and insurance expenses to net earned premiums.

(11) The combined ratio is the sum of the loss ratio and the expense ratio. A combined ratio under 100% generally indicates an underwriting profit. A combined ratio over 100% generally indicates an underwriting loss.

(12) The adjusted loss ratio, adjusted expense ratio and adjusted combined ratio are non-GAAP financial measures. As previously discussed, the Company participated in a MLQS that transferred a portion of its risk related to certain lines of business to reinsurers that received a portion of the direct written premiums on that business. We define our adjusted loss ratio, adjusted expense ratio and adjusted combined ratio as each of our loss ratio, expense ratio and combined ratio, respectively, excluding the effects of the MLQS. See "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Reconciliation of Non-GAAP Financial Measures" for a reconciliation of our loss ratio, expense ratio and combined ratio to our adjusted loss ratio, adjusted expense ratio and adjusted combined ratio.

(13) Return on equity represents net income expressed as a percentage of average beginning and ending stockholders’ equity during the period.

(14) Operating return on equity is net operating earnings expressed as a percentage of average beginning and ending stockholders’ equity during the period and is a non-GAAP financial measure. See "Management’s Discussion and Analysis of Financial Condition and Results of Operations — Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income to net operating earnings.

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Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our consolidated financial statements and the accompanying notes included elsewhere in this Annual Report. The discussion and analysis below include certain forward-looking statements that are subject to risks, uncertainties and other factors described in "Risk Factors" that could cause actual results to differ materially from those expressed in, or implied by, those forward-looking statements. See "Forward-Looking Statements."

Year ended December 31, 2019 compared to year ended December 31, 2018

For a comparison of years ended December 31, 2019 and December 2018, see “Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our annual report on Form 10-K for the fiscal year ended December 31, 2019, which was filed with the SEC on March 2, 2020.

Overview

Founded in 2009, we are an established and growing specialty insurance company. We focus exclusively on the E&S market in the U.S., where we use our underwriting expertise to write coverages for hard-to-place small business risks and personal lines risks. We market and sell these insurance products in all 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands primarily through a network of independent insurance brokers. We have an experienced and cohesive management team, that has an average of over 25 years of relevant experience. Many of our employees and members of our management team have also worked together for decades at other E&S insurance companies.

We have one reportable segment, our Excess and Surplus Lines Insurance segment, which offers P&C insurance products through the E&S market. In 2020, the percentage breakdown of our gross written premiums was 85.6% casualty and 14.4% property. Our commercial lines offerings include construction, small business, excess casualty, commercial property, product liability, allied health, life sciences, general casualty, professional liability, management liability, energy, environmental, health care, inland marine, public entity and commercial insurance. We also write a small amount of homeowners insurance in the personal lines market, which in aggregate represented 3.9% of our gross written premiums in 2020.

Our goal is to deliver long-term value for our stockholders by growing our business and generating attractive returns. We seek to accomplish this by generating consistent and attractive underwriting profits while managing our capital prudently. We believe that we have built a company that is entrepreneurial and highly efficient, using our proprietary technology platform and leveraging the expertise of our highly experienced employees in our daily operations. We believe our systems and technology are at the digital forefront of the insurance industry, allowing us to quickly collect and analyze data, thereby improving our ability to manage our business and reducing response times for our customers. We believe that we have differentiated ourselves from our competitors by effectively leveraging technology, vigilantly controlling expenses and maintaining control over our underwriting and claims management.

COVID-19

We are closely monitoring the impact of the COVID-19 pandemic and related economic effects on all aspects of our business, including how it will impact premium volume, losses and the fair value of our investment portfolio.

To date, management has not seen a significant decrease in the growth rate of its gross written premiums since the beginning of the COVID-19 pandemic and related economic downturn. Over the past year, including a time period

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preceding COVID-19, the E&S segment of the P&C market has been experiencing rapid growth due to dislocation in the overall property and casualty market.

With respect to reported claims, Kinsale does not write lines of business with heightened exposure to COVID-19 related claims. Specifically, Kinsale does not write event cancellation, mortgage insurance, trade credit or surety, workers compensation or reinsurance business. Lines of business written by Kinsale that could be subject to COVID-19 related claims include general liability, management liability, healthcare-related professional liability and commercial property. In each case, policy terms and conditions would be expected to preclude coverage for virus-related claims. Although management cannot definitively determine the ultimate impact of COVID-19 and related economic conditions at this time, management does not currently expect a material adverse effect on Kinsale’s loss ratios due to COVID-19 related claims. 

With respect to our investment portfolio, we seek to hold a high-quality, diversified portfolio of investments. During the first quarter of 2020, we experienced a significant decline in the fair value of our investment portfolio due to disruption in the global financial markets associated with COVID-19. Subsequent to the first quarter of 2020, the fair values of our investment portfolio rebounded sharply, gaining back all of the decline in fair value. However, during economic downturns, certain investments may default or become impaired due to deterioration in the financial condition or due to deterioration in the financial condition of an insurer that guarantees an issuer’s payments on such investments. Given the conservative nature of our investment portfolio, we do not expect a material adverse impact on the value of our investment portfolio or a long-term negative impact on our financial condition, results of operations or cash flows as it relates to COVID-19.

Components of Our Results of Operations

Gross written premiums

Gross written premiums are the amounts received or to be received for insurance policies written or assumed by us during a specific period of time without reduction for policy acquisition costs, reinsurance costs or other deductions. The volume of our gross written premiums in any given period is generally influenced by:

•New business submissions;

•Binding of new business submissions into policies;

•Renewals of existing policies; and

•Average size and premium rate of bound policies.

We earn insurance premiums on a pro rata basis over the term of the policy. Our insurance policies generally have a term of one year. Net earned premiums represent the earned portion of our gross written premiums, less that portion of our gross written premiums that is ceded to third-party reinsurers under our reinsurance agreements.

Ceded written premiums

Ceded written premiums are the amount of gross written premiums ceded to reinsurers. We enter into reinsurance contracts to limit our exposure to potential large losses as well as to provide additional capacity for growth. Ceded written premiums are earned over the reinsurance contract period in proportion to the period of risk covered. The volume of our ceded written premiums is impacted by the level of our gross written premiums and any decision we make to increase or decrease retention levels.

Losses and loss adjustment expenses

Losses and loss adjustment expenses are a function of the amount and type of insurance contracts we write and the loss experience associated with the underlying coverage. In general, our losses and loss adjustment expenses are affected by:

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•Frequency of claims associated with the particular types of insurance contracts that we write;

•Trends in the average size of losses incurred on a particular type of business;

•Mix of business written by us;

•Changes in the legal or regulatory environment related to the business we write;

•Trends in legal defense costs;

•Wage inflation; and

•Inflation in medical costs.

Losses and loss adjustment expenses are based on an actuarial analysis of the estimated losses, including losses incurred during the period and changes in estimates from prior periods. Losses and loss adjustment expenses may be paid out over a period of years.

Underwriting, acquisition and insurance expenses

Underwriting, acquisition and insurance expenses include policy acquisition costs and other underwriting expenses. Policy acquisition costs are principally comprised of the commissions we pay our brokers, net of ceding commissions we receive on business ceded under certain reinsurance contracts. Policy acquisition costs that are directly related to the successful acquisition of those policies are deferred. The amortization of such policy acquisition costs is charged to expense in proportion to premium earned over the policy life. Other underwriting expenses represent the general and administrative expenses of our insurance business including but not limited to employment costs, telecommunication and technology costs, and legal and auditing fees.

Net investment income

Net investment income is an important component of our results of operations. We earn investment income on our portfolio of cash and invested assets. Our cash and invested assets are primarily comprised of fixed-maturity securities, and may also include cash and cash equivalents, equity securities and short-term investments. The principal factors that influence net investment income are the size of our investment portfolio and the yield on that portfolio. As measured by amortized cost (which excludes changes in fair value, such as changes in interest rates), the size of our investment portfolio is mainly a function of our invested equity capital along with premiums we receive from our insureds less payments on policyholder claims.

Change in fair value of equity securities

Change in fair value of equity securities represents the increase or decrease in the market value of equity securities held during the period.

Net realized investment gains (losses) on investments

Net realized gains (losses) on investments are a function of the difference between the amount received by us on the sale of a security and the security's amortized cost, as well as any allowances for credit losses recognized in earnings, if any.

Income tax expense

Currently all of our income tax expense relates to federal income taxes. Kinsale Insurance is generally not subject to income taxes in the states in which it operates; however, our non-insurance subsidiaries are subject to state income taxes. The amount of income tax expense or benefit recorded in future periods will depend on the jurisdictions in which we operate and the tax laws and regulations in effect.

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Key metrics

We discuss certain key metrics, described below, which provide useful information about our business and the operational factors underlying our financial performance.

Underwriting income is a non-GAAP financial measure. We define underwriting income as net income, excluding net investment income, net change in the fair value of equity securities, net realized gains and losses on investments, other income, other expenses and income tax expense. See "—Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income in accordance with GAAP to underwriting income.

Net operating earnings is a non-GAAP financial measure. We define net operating earnings as net income excluding the net change in the fair value of equity securities, after taxes, and net realized gains and losses on investments, after taxes. See "—Reconciliation of non-GAAP financial measures" for a reconciliation of net income in accordance with GAAP to net operating earnings.

Loss ratio, expressed as a percentage, is the ratio of losses and loss adjustment expenses to net earned premiums, net of the effects of reinsurance.

Expense ratio, expressed as a percentage, is the ratio of underwriting, acquisition and insurance expenses to net earned premiums.

Combined ratio is the sum of the loss ratio and the expense ratio. A combined ratio under 100% generally indicates an underwriting profit. A combined ratio over 100% generally indicates an underwriting loss.

Return on equity is net income as a percentage of average beginning and ending total stockholders’ equity during the period.

Operating return on equity is a non-GAAP financial measure. We define operating return on equity as net operating earnings expressed as a percentage of average beginning and ending stockholders’ equity during the period. See "—Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income in accordance with GAAP to net operating earnings.

Net retention ratio is the ratio of net written premiums to gross written premiums.

Gross investment return is investment income from fixed-maturity and equity securities, before any deductions for fees and expenses, expressed as a percentage of average beginning and ending balances of those investments during the period.

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Results of Operations

Year ended December 31, 2020 compared to year ended December 31, 2019

The following table summarizes our results of operations for the years ended December 31, 2020 and 2019:

	Year Ended December 31,
($ in thousands)	2020			2019			Change		Percent
Gross written premiums	$	552,814		$	389,694		$	163,120	41.9	%
Ceded written premiums	(74,595)			(47,633)			(26,962)		56.6	%
Net written premiums	$	478,219		$	342,061		$	136,158	39.8	%
Net earned premiums	$	412,754		$	282,981		$	129,773	45.9	%
Losses and loss adjustment expenses	263,802			169,563			94,239		55.6	%
Underwriting, acquisition and insurance expenses	94,296			70,217			24,079		34.3	%
Underwriting income (1)	54,656			43,201			11,455		26.5	%
Other expenses, net	(741)			(31)			(710)		NM
Net investment income	26,110			20,133			5,977		29.7	%
Change in fair value of equity securities	16,855			12,389			4,466		NM
Net realized gains on investments	3,533			359			3,174		NM
Income before taxes	100,413			76,051			24,362		32.0	%
Income tax expense	11,994			12,735			(741)		(5.8)	%
Net income	$	88,419		$	63,316		$	25,103	39.6	%
Net operating earnings (2)	$	72,313		$	53,245		$	19,068	35.8	%
Loss ratio	63.9		%	59.9		%
Expense ratio	22.8		%	24.8		%
Combined ratio	86.7		%	84.7		%
Return on equity	18.0		%	18.9		%
Operating return on equity (2)	14.7		%	15.9		%

NM - Percentage change is not meaningful

(1) Underwriting income is a non-GAAP financial measure. See "—Reconciliation of Non-GAAP Financial Measures" for a reconciliation of net income in accordance with GAAP to underwriting income.

(2) Net operating earnings and operating return on equity are non-GAAP financial measures. Net operating earnings is defined as net income excluding the effects of the net change in the fair value of equity securities, after taxes, and net realized gains and losses on investments, after taxes. Operating return on equity is defined as net operating earnings expressed as a percentage of average beginning and ending stockholders’ equity during the period. See "—Reconciliation of non-GAAP financial measures" for a reconciliation of net income in accordance with GAAP to net operating earnings.

Net income was $88.4 million for the year ended December 31, 2020 compared to $63.3 million for the year ended December 31, 2019, an increase of $25.1 million, or 39.6%. The increase in net income in 2020 over 2019 was primarily due to higher earned premiums, resulting from favorable E&S market conditions and strong growth in

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broker submissions, and higher returns on our investment portfolio. In addition, the increase in net income was also attributable to a lower effective tax rate generated from the tax benefits related to stock-based compensation activity and higher favorable development of loss reserves from prior accident years. These increases were offset in part by higher catastrophe losses incurred in 2020 compared to the prior year.

Our underwriting income was $54.7 million for the year ended December 31, 2020 compared to $43.2 million for the year ended December 31, 2019, an increase of $11.5 million, or 26.5%. The increase in our underwriting income was attributable to a combination of growth in the business and higher net favorable development of loss reserves for prior accident years, offset in part by higher catastrophe losses incurred during the year. The corresponding combined ratios were 86.7% for the year ended December 31, 2020 compared to 84.7% for the year ended December 31, 2019.

Premiums

Gross written premiums were $552.8 million for the year ended December 31, 2020 compared to $389.7 million for the year ended December 31, 2019, an increase of $163.1 million, or 41.9%. The increase in gross written premiums for the for the year ended December 31, 2020 over the prior year was due to higher submission activity from brokers across most lines of business and higher rates on bound accounts, resulting from continued favorable market conditions. The average premium per policy written by us was $9,100 in 2020 compared to $8,200 in 2019. Excluding our personal lines insurance, which has relatively low premiums per policy written, the average premium per policy written was approximately $11,800 in 2020 compared to $10,800 in 2019. The increase in the average premium per policy written was due to changes in the mix of business and higher rates on bound accounts during 2020 compared to the prior year. The changes in gross written premiums were most notable in the following lines of business:

•Excess casualty, which represented approximately 13.9% of our gross written premiums in 2020, increased by $25.5 million, or 49.8%, for the year ended December 31, 2020 over the prior year;

•Commercial property, which represented approximately 9.4% of our gross written premiums in 2020, increased by $22.7 million, or 77.9%, for the year ended December 31, 2020 over the prior year;

•Small business, which represented approximately 15.1% of our gross written premiums in 2020, increased by $20.1 million, or 31.8%, for the year ended December 31, 2020 over the prior year, and

•Construction, which represented approximately 15.8% of our gross written premiums in 2020, increased by $16.2 million, or 22.8%, for the year ended December 31, 2020 over the prior year.

Net written premiums increased by $136.2 million, or 39.8%, to $478.2 million for the year ended December 31, 2020 from $342.1 million for the year ended December 31, 2019. The increase in net written premiums was largely due to higher gross written premiums for the year ended December 31, 2020. Our net retention ratio was 86.5% for the year ended December 31, 2020 compared to 87.8% for the year ended December 31, 2019. The decrease in the net retention ratio was primarily due to change in the mix of business.

Net earned premiums were $412.8 million for the year ended December 31, 2020 compared to $283.0 million for the year ended December 31, 2019, an increase of $129.8 million, or 45.9%. As previously discussed, the increase was due to growth in gross written premiums in 2020 compared to 2019.

Loss ratio

Our loss ratio was 63.9% for the year ended December 31, 2020 compared to 59.9% for the year ended December 31, 2019. The increase in the loss ratio for the year ended December 31, 2020 was primarily due to higher

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catastrophe losses incurred in 2020 compared to 2019. Catastrophe losses incurred during the current accident year in 2020 were largely related to Hurricanes Laura, Sally and Zeta and the California wildfires.

For each year of 2020 and 2019, the overall favorable development of loss reserves for prior accident years was primarily due to reported losses emerging at lower levels than expected for certain accident years. During the year ended December 31, 2020, prior accident years developed favorably by $13.3 million, of which $12.3 million was attributable to accident years 2019 and 2018.

During the year ended December 31, 2019, loss reserves for prior accident years developed favorably by $9.4 million, which was largely attributable to accident years 2018 and 2017 of $14.6 million. This favorable development was offset in part by adverse development in the accident years 2011 through 2015 of $5.2 million, which resulted from higher IBNR reserves to provide for emergence of reported losses over a longer period of time based on observed trends.

On an inception-to-date basis as of December 31, 2020, all accident years have developed favorably, with the exception of the 2011 accident year.

The following tables summarize the effect of the factors indicated above on the loss ratios for the years ended December 31, 2020 and 2019:

	Year Ended December 31,
	2020				2019
($ in thousands)	Losses and Loss Adjustment Expenses		% of Earned Premiums		Losses and Loss Adjustment Expenses		% of Earned Premiums
Loss ratio:
Current accident year	$	253,948	61.5	%	$	175,939	62.1	%
Current accident year - catastrophe losses	23,192		5.6	%	3,047		1.1	%
Effect of prior year development	(13,338)		(3.2)	%	(9,423)		(3.3)	%
Total	$	263,802	63.9	%	$	169,563	59.9	%

Expense ratio

The following table summarizes the components of the expense ratio for the years ended December 31, 2020 and 2019:

	Year Ended December 31,
	2020				2019
($ in thousands)	Underwriting Expenses		% of Earned Premiums		Underwriting Expenses		% of Earned Premiums
Commissions incurred:
Direct	$	69,922	16.9	%	$	48,382	17.1	%
Ceding	(16,145)		(3.9)	%	(12,347)		(4.4)	%
Net commissions incurred	53,777		13.0	%	36,035		12.7	%
Other underwriting expenses	40,519		9.8	%	34,182		12.1	%
Underwriting, acquisition, and insurance expenses	$	94,296	22.8	%	$	70,217	24.8	%

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The expense ratio was 22.8% for the year ended December 31, 2020 compared to 24.8% for the year ended December 31, 2019. The decrease in the expense ratio was primarily due to higher net earned premiums, without a proportional increase in the amount of other underwriting expenses as a result of management's focus on controlling costs. Direct commissions paid as a percent of gross written premiums was 14.6% for the years ended December 31, 2020 and 2019.

Investing results

Our net investment income increased by 29.7% to $26.1 million for the year ended December 31, 2020 from $20.1 million for the year ended December 31, 2019, primarily due to growth in our investment portfolio balance generated from excess operating funds and to a lesser degree, proceeds from our equity offerings.

The following table summarizes the components of net investment income and net investment gains for the years ended December 31, 2020 and 2019:

	Year Ended December 31,
($ in thousands)	2020		2019		Change
Interest from fixed-maturity securities	$	24,111	$	18,545	$	5,566
Dividends on equity securities	3,512		2,136		1,376
Other	262		842		(580)
Gross investment income	27,885		21,523		6,362
Investment expenses	(1,775)		(1,390)		(385)
Net investment income	26,110		20,133		5,977
Change in the fair value of equity securities	16,855		12,389		4,466
Net capital gains	3,533		359		3,174
Net investment gains	20,388		12,748		7,640
Total	$	46,498	$	32,881	$	13,617

The weighted average duration of our fixed-maturity portfolio, including cash equivalents, was 4.3 years at December 31, 2020 and 2019. Our investment portfolio had a gross return of 2.9% as of December 31, 2020, compared to 3.1% as of December 31, 2019.

During the year ended December 31, 2020, we recognized unrealized gains related to our equity portfolio of $16.9 million, of which $16.4 million was related to our ETFs. Our ETF portfolio is generally reflective of the performance in the broader domestic stock markets. During the first quarter of 2020, the fair values our ETFs declined by $13.1 million, driven by the disruption in the financial markets associated with the COVID-19 pandemic. The fair value of these funds rebounded sharply during the second quarter of 2020, gaining back a substantial portion of the decline in value, and fair values continued to increase during the latter half of 2020 on an improving outlook. For the year ended December 31, 2019, we recognized unrealized gains related to our equity portfolio of $12.4 million and was reflective of gains in the broader stock markets during this period.

Net capital gains were $3.5 million for the year ended December 31, 2020, primarily due to the sale of corporate bonds to realize favorable investment valuations.

We perform quarterly reviews of all available-for-sale securities within our investment portfolio to determine whether the decline in a security's fair value is deemed to be a credit loss. Management concluded that there were no credit losses (previously known as other-than-temporary impairments) from available-for-sale investments for the year ended December 31, 2020 or 2019.

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Income tax expense

Our effective tax rate was approximately 11.9% for the year ended December 31, 2020 compared to 16.7% for the year ended December 31, 2019. The effective tax rate was lower than the federal statutory rate of 21% primarily due to the tax benefits from stock-based compensation and tax-exempt investment income.

Return on equity

Our return on equity was 18.0% for the year ended December 31, 2020 compared to 18.9% for the year ended December 31, 2019. Operating return on equity was 14.7% for the full year of 2020, a decrease from 15.9% for the full year of 2019. The decrease in the operating return on equity was due largely to the proceeds received from our equity offering in the third quarter of 2020 and catastrophe losses incurred during the year, offset in part by higher net income.

Liquidity and Capital Resources

Sources and uses of funds

We are organized as a Delaware holding company with our operations primarily conducted by our wholly-owned insurance subsidiary, Kinsale Insurance, which is domiciled in Arkansas. Accordingly, Kinsale may receive cash through (1) loans from banks, (2) issuance of equity and debt securities, (3) corporate service fees from our insurance subsidiary, (4) payments from our subsidiaries pursuant to our consolidated tax allocation agreement and other transactions and (5) dividends from our insurance subsidiary. We may use the proceeds from these sources to contribute funds to Kinsale Insurance in order to support premium growth, reduce our reliance on reinsurance, pay dividends and taxes and for other business purposes.

We receive corporate service fees from Kinsale Insurance to reimburse us for most of the operating expenses that we incur. Reimbursement of expenses through corporate service fees is based on the actual costs that we expect to incur with no mark-up above our expected costs.

We file a consolidated federal income tax return with our subsidiaries, and under our corporate tax allocation agreement, each participant is charged or refunded taxes according to the amount that the participant would have paid or received had it filed on a separate return basis with the Internal Revenue Service.

State insurance laws restrict the ability of Kinsale Insurance to declare stockholder dividends without prior regulatory approval. State insurance regulators require insurance companies to maintain specified levels of statutory capital and surplus. The maximum dividend distribution Kinsale Insurance may make absent the approval or non-disapproval of the insurance regulatory authority in Arkansas is limited by Arkansas law to the greater of (1) 10% of policyholder surplus as of December 31 of the previous year, or (2) net income, not including realized capital gains, for the previous calendar year. The Arkansas statute also requires that dividends and other distributions be paid out of positive unassigned surplus without prior approval. The maximum amount of dividends Kinsale Insurance can pay us during 2021 without regulatory approval is $51.8 million. Insurance regulators have broad powers to ensure that statutory surplus remains at adequate levels, and there is no assurance that dividends of the maximum amount calculated under any applicable formula would be permitted. In the future, state insurance regulatory authorities that have jurisdiction over the payment of dividends by Kinsale Insurance may adopt statutory provisions more restrictive than those currently in effect. Kinsale Insurance did not pay dividends to us during 2020. See also "Risk Factors — Risks Related to Our Business and Our Industry — Because we are a holding company and substantially all of our operations are conducted by our insurance subsidiary, our ability to pay dividends depends on our ability to obtain cash dividends or other permitted payments from our insurance subsidiary."

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As of December 31, 2020, our holding company had $8.4 million in cash and investments, compared to $14.7 million as of December 31, 2019.

Management believes there is sufficient liquidity available at the holding company and in its insurance subsidiary, Kinsale Insurance, as well as in its other operating subsidiaries, to meet its operating cash needs and obligations and committed capital expenditures for the next 12 months.

Credit agreement

On May 28, 2019, we entered into a Credit Agreement that provided us with a $50 million Credit Facility (the "Credit Facility") and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund the construction of our new headquarters but may also be used for working capital and general corporate purposes. As of December 31, 2020, there was $42.6 million outstanding under the Credit Facility, net of debt issuance costs.

Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% or 1.75%, depending on which interest option was applicable for the particular ABR loan.

The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2020, the Company was in compliance with all of its financial covenants under the Credit Facility.

In July 2017, the U.K. Financial Conduct Authority announced that, after the end of 2021, it would no longer persuade or compel contributing banks to make rate submissions to the ICE Benchmark Administration (together with any successor to the ICE Benchmark Administrator, the “IBA”) for purposes of the IBA setting the London interbank offered rate. On November 30, 2020, the IBA announced a consultation on its intention to 1) cease the publication of the one-week and two-month USD LIBOR after December 31, 2021, and 2) cease the publication of all other tenors of USD LIBOR after June 30, 2023, including the three-month USD LIBOR rate. The IBA closed the consultations for feedback at the end of January 2021. The Credit Agreement provides procedures for determining a replacement or alternative base rate in the event that LIBOR is discontinued. However, there can be no assurances as to whether such replacement or alternative base rate will be more or less favorable than LIBOR. The Company intends to monitor the developments with respect to the potential phasing out of LIBOR and work with its lenders to seek to ensure any transition away from LIBOR will have minimal impact on its financial condition, but can provide no assurances regarding the impact of the discontinuation of LIBOR.

Shelf registration

In August 2019, we filed a universal shelf registration statement with the SEC that expires in 2022. We can use this shelf registration to issue an unspecified amount of debt securities, common stock, preferred stock, depositary shares and warrants. The specific terms of any securities we issue under this registration statement will be provided in the applicable prospectus supplements.

On August 7, 2020, we completed an underwritten public offering and sold and issued 310,500 shares of our common stock at a price of $190 per share. After deducting underwriting discounts and commissions, we received net proceeds of $56.7 million, which was used for general corporate purposes, including to fund organic growth.

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Cash flows

Our most significant source of cash is from premiums received from our insureds, which, for most policies, we receive at the beginning of the coverage period. Our most significant cash outflow is for claims that arise when a policyholder incurs an insured loss. Because the payment of claims occurs after the receipt of the premium, often years later, we invest the cash in various investment securities that earn interest and dividends. We also use cash to pay commissions to brokers, as well as to pay for ongoing operating expenses such as salaries, consulting services and taxes. As described under "—Reinsurance" below, we use reinsurance to manage the risk that we take on our policies. We cede, or pay out, part of the premiums we receive to our reinsurers and collect cash back when losses subject to our reinsurance coverage are paid.

The timing of our cash flows from operating activities can vary among periods due to the timing by which payments are made or received. Some of our payments and receipts, including loss settlements and subsequent reinsurance receipts, can be significant, so their timing can influence cash flows from operating activities in any given period. Management believes that cash receipts from premiums, proceeds from investment sales and redemptions and investment income are sufficient to cover cash outflows in the foreseeable future.

Our cash flows for the years ended December 31, 2020 and 2019 were:

	Year Ended December 31,
	2020		2019
	(in thousands)
Cash and cash equivalents provided by (used in):
Operating activities	$	279,974	$	178,357
Investing activities	(379,433)		(230,793)
Financing activities	76,144		77,755
Change in cash and cash equivalents	$	(23,315)	$	25,319

We have historically generated positive operating cash flows. The increase in cash provided by operating activities in 2020 compared to 2019 was due primarily to growth in business and the timing of claim payments and reinsurance recoverable balances. Cash flows from operations were used to fund investing activities and to pay dividends to our stockholders.

Net cash used in investing activities increased by $148.6 million in 2020 from 2019, which reflected growth in our business operations and proceeds from our equity offering in August 2020 of $56.7 million. For the year ended December 31, 2020, these funds were used to purchase fixed-maturity securities, particularly corporate bonds and asset- and mortgage-backed securities of $474.8 million, and to a lesser extent, municipal bonds of $54.8 million and U.S. Treasuries of $1.1 million. During 2020, we received proceeds of $119.7 million from sales of fixed-maturity securities, largely corporate bonds in order to take advantage of favorable valuations. In addition, we received proceeds of $93.8 million from redemptions of asset- and mortgage-backed securities and corporate bonds. For the year ended December 31, 2020, purchases of ETFs and non-redeemable preferred stock were $27.2 million and $9.6 million, respectively. Net cash used in investing activities included net purchases of property and equipment of $27.8 million, primarily related to the construction of our new corporate headquarters, previously discussed.

For the year ended December 31, 2019, net cash used in investing activities of $230.8 million reflected the investment of operating funds from growth in our business operations and proceeds from our equity offering in August of 2019. These cash inflows were used to purchase fixed-maturity securities, particularly corporate bonds and residential mortgage-backed securities of $203.0 million, and to a lesser extent, other asset-backed securities of

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$60.4 million and municipal bonds of $42.8 million. During 2019, we received proceeds of $35.5 million from sales of fixed-maturity securities, largely municipal bonds in order to take advantage of favorable valuations. In addition, we received proceeds of $67.9 million from redemptions of asset- and mortgage-backed securities and corporate bonds.

During 2019, the Company reallocated its ETFs from foreign and small-cap funds to domestic equity funds to more closely mirror the broader U.S. stock market. For the year ended December 31, 2019, purchases and sales of ETFs were $19.3 million and $13.7 million, respectively. For the year ended December 31, 2019, purchases and sales of non-redeemable preferred stocks were $10.6 million and $7.8 million, respectively. Net cash used in investing activities during 2019 included purchases of property and equipment of $19.6 million and was principally comprised of expenditures related to the construction of our new corporate headquarters, discussed previously.

For the year ended December 31, 2020, net cash provided by financing activities was $76.1 million and reflected the proceeds from our equity offering of $56.7 million, previously discussed, and the drawdown of $25.7 million on our Credit Facility, which was used to fund construction of our new headquarter facilities. During the year ended December 31, 2020, we paid dividends of $0.36 per common share, or $8.1 million in the aggregate. Proceeds received from our equity compensation plans were $3.6 million, offset by payroll taxes withheld and remitted on restricted stock awards of $1.8 million for the year ended December 31, 2020.

For the year ended December 31, 2019, net cash provided by financing activities was $77.8 million and reflected the proceeds from our equity offering of $65.9 million, previously discussed, and the drawdown of $17.3 million on our Credit Facility, which was used to fund construction of our new headquarter facilities. During year ended December 31, 2019 we paid dividends of $0.32 per common share, or $6.9 million in the aggregate. During 2019, we received net proceeds of $2.1 million from our equity compensation plans.

Reinsurance

We enter into reinsurance contracts to limit our exposure to potential large losses as well as to provide additional capacity for growth. Our reinsurance is primarily contracted under quota-share reinsurance contracts and excess of loss contracts. In quota-share reinsurance, the reinsurer agrees to assume a specified percentage of the ceding company's losses arising out of a defined class of business in exchange for a corresponding percentage of premiums, net of a ceding commission. In excess of loss reinsurance, the reinsurer agrees to assume all or a portion of the ceding company's losses, in excess of a specified amount. In excess of loss reinsurance, the premium payable to the reinsurer is negotiated by the parties based on their assessment of the amount of risk being ceded to the reinsurer because the reinsurer does not share proportionately in the ceding company's losses.

For the year ended December 31, 2020, property insurance represented 14.4% of our gross written premiums. When we write property insurance, we buy reinsurance to significantly mitigate our risk. We use computer models to analyze the risk of severe losses from weather-related events and earthquakes. We measure exposure to these catastrophe losses in terms of PML, which is an estimate of what level of loss we would expect to experience in a windstorm or earthquake event occurring once in every 100 or 250 years. We manage this PML by purchasing catastrophe reinsurance coverage. Effective June 1, 2020, we purchased catastrophe reinsurance coverage of $45.0 million per event in excess of our $10.0 million per event retention. Our property catastrophe reinsurance includes a reinstatement provision which requires us to pay reinstatement premiums after a loss has occurred in order to preserve coverage. Including the reinstatement provision, the maximum aggregate loss recovery limit is $90 million and is in addition to the per-occurrence coverage provided by our facultative and treaty coverages.

Reinsurance contracts do not relieve us from our obligations to policyholders. Failure of the reinsurer to honor its obligation could result in losses to us, and therefore, we established an allowance for credit risk based on historical analysis of credit losses for highly rated companies in the insurance industry. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk arising from its exposure to individual reinsurers.

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As of December 31, 2020, Kinsale Insurance has only contracted with reinsurers with A.M. Best financial strength ratings of "A" (Excellent) or better. At December 31, 2020, the net reinsurance receivable, defined as the sum of paid and unpaid reinsurance recoverables, ceded unearned premiums less reinsurance payables, from five reinsurers represented 78.1% of the total balance. During 2020, we adopted new accounting guidance ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) and, as a result, we recorded an allowance for doubtful accounts of $0.3 million related to our reinsurance balances at December 31, 2020.

Ratings

Kinsale Insurance has a financial strength rating of "A" (Excellent) from A.M. Best. A.M. Best assigns ratings to insurance companies, which currently range from "A++" (Superior) to "F" (In Liquidation). "A" (Excellent) is the third highest rating issued by A.M. Best. The "A" (Excellent) rating is assigned to insurers that have, in A.M. Best's opinion, an excellent ability to meet their ongoing obligations to policyholders. This rating is intended to provide an independent opinion of an insurer's ability to meet its obligation to policyholders and is not an evaluation directed at investors. See also "Risk Factors — Risks Related to Our Business and Our Industry — A decline in our financial strength rating may adversely affect the amount of business we write."

The financial strength ratings assigned by A.M. Best have an impact on the ability of the insurance companies to attract and retain agents and brokers and on the risk profiles of the submissions for insurance that the insurance companies receive. The "A" (Excellent) rating obtained by Kinsale Insurance is consistent with our business plan and allows us to actively pursue relationships with the agents and brokers identified in our marketing plan.

Contractual obligations and commitments

The following table illustrates our contractual obligations and commercial commitments by due date as of December 31, 2020:

	Payments Due by Period
	Total		Less Than One Year		One Year to Less Than Three Years		Three Years to Less Than Five Years		More Than Five Years
	(in thousands)
Reserves for losses and loss adjustment expenses	$	636,013	$	132,507	$	213,669	$	124,936	$	164,901
Credit facility	45,871		846		1,686		43,339		—
Total	$	681,884	$	133,353	$	215,355	$	168,275	$	164,901

Reserves for losses and loss adjustment expenses

Reserves for losses and loss adjustment expenses represent our best estimate of the ultimate cost of settling reported and unreported claims and related expenses. As discussed previously, the estimation of loss and loss expense reserves is based on various complex and subjective judgments. Actual losses and settlement expenses paid may deviate, perhaps substantially, from the reserve estimates reflected in our consolidated financial statements. Similarly, the timing for payment of our estimated losses is not fixed and is not determinable on an individual or aggregate basis. The assumptions used in estimating the payments due by period are based on Company experience as well as on industry and peer-group claims payment experience. Due to the uncertainty inherent in the process of estimating the timing of such payments, there is a risk that the amounts paid in any period can be significantly different than the amounts disclosed above. Amounts disclosed above are gross of anticipated amounts recoverable from reinsurers. Reinsurance balances recoverable on reserves for losses and loss adjustment expenses are reported

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separately as assets, instead of being netted with the related liabilities, since reinsurance does not discharge us of our liability to policyholders. Reinsurance balances recoverable on reserves for paid and unpaid losses and loss adjustment expenses totaled $93.2 million at December 31, 2020.

Credit facility

As of December 31, 2020, we had $42.6 million outstanding under the Credit Facility, which has a maturity of May 28, 2024. Interest on the outstanding amounts is estimated based on 3-month LIBOR plus a margin of 1.75%. Current borrowings under the Credit Facility were used to fund construction of our new headquarters, which was substantially complete at December 31, 2020. However, we may decide to repay the Credit Facility without penalty and as a result, actual amounts paid and the associated interest may differ from the estimates presented.

Financial Condition

Stockholders' equity

At December 31, 2020, total stockholders' equity was $576.2 million and tangible stockholders' equity was $573.4 million, compared to total stockholders' equity of $405.9 million and tangible stockholders' equity of $403.1 million at December 31, 2019. The increase in both total stockholders' equity and tangible stockholders' equity in 2020 compared to 2019 was primarily due to profits generated during the period, proceeds received from the public equity offering in August of 2020, an increase in unrealized gains on available-for-sale investments, net of taxes, and net activity related to stock-based compensation plans. These increases were offset in part by the dividends declared during 2020. Tangible stockholders’ equity is a non-GAAP financial measure. See "—Reconciliation of non-GAAP financial measures" for a reconciliation of stockholders' equity in accordance with GAAP to tangible stockholders' equity.

Equity-based compensation

On July 27, 2016, the Kinsale Capital Group, Inc. 2016 Omnibus Incentive Plan (the "2016 Incentive Plan"), became effective. The 2016 Incentive Plan provides for grants of stock options, restricted stock, restricted stock units and other stock-based awards to directors, officers and other employees, as well as independent contractors or consultants providing consulting or advisory services to the Company. The number of shares of common stock available for issuance under the 2016 Incentive Plan may not exceed 2,073,832.

During 2020, 42,694 shares of restricted stock awards were granted under the 2016 Incentive Plan to the Company’s employees and non-employee directors. The restricted stock had a weighted average fair value on the date of grant of $147.45 per share and vest over a term of 1 to 4 years.

On January 1, 2021, the Board of Directors granted 3,200 shares of restricted stock awards under the 2016 Incentive Plan to the Company’s non-employee directors. The restricted stock had a fair value on the date of grant of $200.13 per share and will vest on the first anniversary date of the grant.

Dividend declarations

On February 13, 2020, the Company’s Board of Directors declared a cash dividend of $0.09 per share of common stock. This dividend was paid on March 12, 2020 to all stockholders of record on February 28, 2020.

On May 21, 2020, the Company’s Board of Directors declared a cash dividend of $0.09 per share of common stock. This dividend was paid on June 12, 2020 to all stockholders of record on June 2, 2020.

On August 18, 2020, the Company’s Board of Directors declared a cash dividend of $0.09 per share of common stock. This dividend was paid on September 14, 2020 to all stockholders of record on August 31, 2020.

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On November 11, 2020, the Company’s Board of Directors declared a cash dividend of $0.09 per share of common stock. This dividend was paid on December 11, 2020 to all stockholders of record on November 30, 2020.

On February 11, 2021, the Company’s Board of Directors declared a cash dividend of $0.11 per share of common stock. This dividend is payable on March 12, 2021 to all stockholders of record on February 26, 2021.

Investment portfolio

At December 31, 2020, our cash and invested assets of $1.3 billion consisted of fixed-maturity securities, cash and cash equivalents and equity securities. At December 31, 2020, the majority of the investment portfolio was comprised of fixed-maturity securities of $1.1 billion that were classified as available-for-sale. Available-for-sale investments are carried at fair value with unrealized gains and losses on those securities, net of applicable taxes, reported as a separate component of accumulated other comprehensive income. At December 31, 2020, we also held $77.1 million of cash and cash equivalents and $129.7 million of equity securities, which are comprised of ETFs and non-redeemable preferred stock. Our fixed-maturity securities, including cash equivalents, had a weighted average duration of 4.3 years and an average rating of "AA-" at December 31, 2020. Our investment portfolio, excluding cash equivalents, had a gross return of 2.9% as of December 31, 2020, compared to 3.1% as of December 31, 2019.

At December 31, 2020, the amortized cost and estimated fair value of our investments were as follows:

	December 31, 2020
	Amortized Cost		Estimated Fair Value		% of Total Fair Value
	($ in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	230,906	19.1	%
Corporate and other securities	294,854		316,608		26.1	%
Asset-backed securities	236,813		240,661		19.9	%
Commercial mortgage-backed securities	66,110		70,969		5.8	%
Residential mortgage-backed securities	217,859		222,656		18.4	%
Total fixed maturities	1,031,817		1,081,800		89.3	%
Equity securities:
Exchange traded funds	68,032		98,050		8.1	%
Nonredeemable preferred stock	30,726		31,612		2.6	%
Total equity securities	98,758		129,662		10.7	%
Total investments	$	1,130,575	$	1,211,462	100.0	%

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The table below summarizes the credit quality of our fixed-maturity securities as of December 31, 2020, as rated by Standard & Poor’s Financial Services, LLC ("Standard & Poor's") or equivalent designation:

	December 31, 2020
Standard & Poor’s or Equivalent Designation	Estimated Fair Value		% of Total
	($ in thousands)
AAA	$	312,721	28.9	%
AA	382,174		35.3	%
A	187,970		17.4	%
BBB	157,777		14.6	%
Below BBB	41,158		3.8	%
Total	$	1,081,800	100.0	%

The amortized cost and estimated fair value of our available-for-sale investments in fixed-maturity securities summarized by contractual maturity as of December 31, 2020, were as follows:

	December 31, 2020
	Amortized Cost		Estimated Fair Value		% of Fair Value
	($ in thousands)
Due in one year or less	$	15,545	$	15,782	1.5	%
Due after one year through five years	107,150		115,390		10.7	%
Due after five years through ten years	156,958		169,711		15.7	%
Due after ten years	231,382		246,631		22.8	%
Asset-backed securities	236,813		240,661		22.2	%
Commercial mortgage-backed securities	66,110		70,969		6.5	%
Residential mortgage-backed securities	217,859		222,656		20.6	%
Total fixed maturities	$	1,031,817	$	1,081,800	100.0	%

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties, and the lenders may have the right to put the securities back to the borrower.

Restricted investments

In order to conduct business in certain states, we are required to maintain letters of credit or assets on deposit to support state-mandated insurance regulatory requirements and to comply with certain third-party agreements. Assets held on deposit or in trust accounts are primarily in the form of cash or certain high-grade securities. The fair value of our restricted assets was $6.9 million at December 31, 2020 and 2019.

Off-balance sheet arrangements

We do not have any material off-balance sheet arrangements as of December 31, 2020.

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Reconciliation of Non-GAAP Financial Measures

Reconciliation of underwriting income

Underwriting income is a non-GAAP financial measure that we believe is useful in evaluating our underwriting performance without regard to investment income. Underwriting income is defined as net income excluding net investment income, the net change in the fair value of equity securities, net realized gains and losses on investments, other income, other expenses and income tax expense. We use underwriting income as an internal performance measure in the management of our operations because we believe it gives us and users of our financial information useful insight into our results of operations and our underlying business performance. Underwriting income should not be viewed as a substitute for net income calculated in accordance with GAAP, and other companies may define underwriting income differently.

Net income for the years ended December 31, 2020, 2019, 2018, 2017 and 2016 reconciles to underwriting income as follows:

	Year Ended December 31,
($ in thousands)	2020		2019		2018		2017		2016
Net income	$	88,419	$	63,316	$	33,787	$	24,901	$	26,167
Income tax expense	11,994		12,735		6,693		13,620		13,369
Income before taxes	100,413		76,051		40,480		38,521		39,536
Other expenses	1,375		57		168		429		2,567
Net investment income	(26,110)		(20,133)		(15,688)		(10,569)		(7,487)
Change in the fair value of equity securities	(16,855)		(12,389)		6,555		—		—
Net realized investment gains	(3,533)		(359)		(281)		(151)		(176)
Other income	(634)		(26)		(12)		(3)		(136)
Underwriting income	$	54,656	$	43,201	$	31,222	$	28,227	$	34,304

Reconciliation of adjusted loss ratio, adjusted expense ratio and adjusted combined ratio

Our adjusted loss ratio, adjusted expense ratio and adjusted combined ratio are non-GAAP financial measures. We define our adjusted loss ratio, adjusted expense ratio and adjusted combined ratio as each of our loss ratio, expense ratio and combined ratio, respectively, excluding the effects of the MLQS. We use these adjusted ratios as an internal performance measure in the management of our operations because we believe they give our management and other users of our financial information useful insight into our results of operations and our underlying business performance. Our adjusted loss ratio, adjusted expense ratio and adjusted combined ratio should not be viewed as substitutes for our loss ratio, expense ratio and combined ratio, respectively, which are presented in accordance with GAAP.

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The effect of the MLQS on our results of operations is primarily reflected in our ceded written premiums, losses and loss adjustment expenses, as well as our underwriting, acquisition and insurance expenses. The following table summarize the effect of the MLQS on our underwriting income for the year ended December 31, 2016:

	Year Ended December 31, 2016
($ in thousands)	Including Quota Share			Effect of Quota Share			Excluding Quota Share
Net earned premiums	$	133,816		$	(16,996)		$	150,812
Losses and loss adjustment expenses	(70,961)			4,380			(75,341)
Underwriting, acquisition and insurance expenses	(28,551)			11,936			(40,487)
Underwriting income	$	34,304		$	(680)		$	34,984
Loss ratio	53.0		%	25.8		%	—
Expense ratio	21.3		%	70.2		%	—
Combined ratio	74.3		%	96.0		%	—
Adjusted loss ratio	—			—			50.0		%
Adjusted expense ratio	—			—			26.8		%
Adjusted combined ratio	—			—			76.8		%

Reconciliation of net operating earnings

Net operating earnings is defined as net income excluding the effects of the net change in the fair value of equity securities, after taxes, and net realized gains and losses on investments, after taxes, as well as the earnings impact of the deferred tax revaluation recognized resulting from the enactment of the TCJA in December 2017. Management believes the exclusion of these items provides a more useful comparison of the Company's underlying business performance from period to period. Net operating earnings and percentages or calculations using net operating earnings (e.g., operating return on equity) are non-GAAP financial measures. Net operating earnings should not be viewed as a substitute for net income calculated in accordance with GAAP, and other companies may define net operating earnings differently.

Net income for the years ended December 31, 2020, 2019, 2018, 2017 and 2016 reconcile to net operating earnings as follows:

	Year Ended December 31,
($ in thousands)	2020			2019			2018			2017			2016
Net income	$	88,419		$	63,316		$	33,787		$	24,901		$	26,167
Change in the fair value of equity securities, after taxes	(13,315)			(9,787)			5,178			—			—
Net realized gains on investments, after taxes	(2,791)			(284)			(222)			(98)			(114)
TCJA charge	—			—			—			1,915			—
Net operating earnings	$	72,313		$	53,245		$	38,743		$	26,718		$	26,053
Operating return on equity:
Average equity (1)	$	491,059		$	334,933		$	251,088		$	224,202		$	161,833
Return on equity (2)	18.0		%	18.9		%	13.5		%	11.1		%	16.2		%
Operating return on equity (3)	14.7		%	15.9		%	15.4		%	11.9		%	16.1		%

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(1) Computed by adding the total stockholders' equity as of the date indicated to the prior year-end total and dividing by two.

(2) Return on equity represents net income expressed as a percentage of average beginning and ending stockholders’ equity during the period.

(3) Operating return on equity is net operating earnings expressed as a percentage of average beginning and ending stockholders’ equity during the period.

Reconciliation of tangible stockholders' equity

Tangible stockholders’ equity is a non-GAAP financial measure. We define tangible stockholders’ equity as stockholders’ equity less intangible assets, net of deferred taxes. Our definition of tangible stockholders’ equity may not be comparable to that of other companies, and it should not be viewed as a substitute for stockholders’ equity calculated in accordance with GAAP. We use tangible stockholders' equity internally to evaluate the strength of our balance sheet and to compare returns relative to this measure.

Stockholders' equity at December 31, 2020, 2019, 2018, 2017, and 2016, reconciles to tangible stockholders' equity as follows:

	December 31,
	2020		2019		2018		2017		2016
	(in thousands)
Stockholders' equity	$	576,238	$	405,880	$	263,986	$	238,189	$	210,214
Less: Intangible assets, net of deferred taxes	2,795		2,795		2,795		2,795		2,300
Tangible stockholders' equity	$	573,443	$	403,085	$	261,191	$	235,394	$	207,914

Critical Accounting Estimates

We identified the accounting estimates which are critical to the understanding of our financial position and results of operations. Critical accounting estimates are defined as those estimates that are both important to the portrayal of our financial condition and results of operations and require us to exercise significant judgment. We use significant judgment concerning future results and developments in applying these critical accounting estimates and in preparing our consolidated financial statements. These judgments and estimates affect our reported amounts of assets, liabilities, revenues and expenses and the disclosure of our material contingent assets and liabilities, if any. Actual results may differ materially from the estimates and assumptions used in preparing the consolidated financial statements. We evaluate our estimates regularly using information that we believe to be relevant. For a detailed discussion of our accounting policies, see the "Notes to Consolidated Financial Statements" included in this Annual Report on Form 10-K.

Reserves for unpaid losses and loss adjustment expenses

The reserves for unpaid losses and loss adjustment expenses are the largest and most complex estimate in our consolidated balance sheet. The reserves for unpaid losses and loss adjustment expenses represent our estimated ultimate cost of all unreported and reported but unpaid insured claims and the cost to adjust these losses that have occurred as of or before the consolidated balance sheet date. As a relatively new company, our historical loss experience is limited. We estimate the reserves using individual case-basis valuations of reported claims and statistical analyses. Those estimates are based on our historical information, industry information and our estimates of future trends in variable factors such as loss severity, loss frequency and other factors such as inflation. We regularly review our estimates and adjust them as necessary as experience develops or as new information becomes

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known to us. Such adjustments are included in current operations. Additionally, during the loss settlement period, it often becomes necessary to refine and adjust the estimates of liability on a claim either upward or downward. Even after such adjustments, ultimate liability may exceed or be less than the revised estimates. Accordingly, the ultimate settlement of losses and the related loss adjustment expenses may vary significantly from the estimate included in our consolidated financial statements.

We categorize our reserves for unpaid losses and loss adjustment expenses into two types: case reserves and reserves for incurred but not reported losses ("IBNR"). Our gross reserves for losses and loss adjustment expenses at December 31, 2020 were $636.0 million, and of this amount, 84.2% related to IBNR. Our reserves for losses and loss adjustment expenses, net of reinsurance, at December 31, 2020 were $552.3 million, and of this amount, 84.9% related to IBNR. A 5% change in net IBNR reserves at December 31, 2020 would equate to an $23.4 million change in the reserve for losses and loss adjustment expenses at such date, as well as $18.5 million change in net income, a 3.2% change in both stockholders' equity and tangible stockholders' equity, in each case at or for the year ended December 31, 2020.

The following tables summarize our reserves for unpaid losses and loss adjustment expenses, on a gross basis and net of reinsurance, at December 31, 2020 and 2019:

	December 31, 2020
	Gross		% of Total		Net		% of Total
	($ in thousands)
Case reserves	$	100,628	15.8	%	$	83,638	15.1	%
IBNR	535,385		84.2		468,645		84.9
Total	$	636,013	100.0	%	$	552,283	100.0	%

	December 31, 2019
	Gross		% of Total		Net		% of Total
	($ in thousands)
Case reserves	$	82,113	17.8	%	$	65,588	16.8	%
IBNR	377,945		82.2		324,678		83.2
Total	$	460,058	100.0	%	$	390,266	100.0	%

Case reserves are established for individual claims that have been reported to us. We are notified of losses by our insureds or their brokers. Based on the information provided, we establish case reserves by estimating the ultimate losses from the claim, including defense costs associated with the ultimate settlement of the claim. Our claims department personnel use their knowledge of the specific claim along with advice from internal and external experts, including underwriters and legal counsel, to estimate the expected ultimate losses. During the life cycle of a particular claim, as more information becomes available, we may revise our estimate of the ultimate value of the claim either upward or downward. The amount of the individual claim reserve is based on the most recent information available.

IBNR reserves are determined using actuarial methods to estimate losses that have occurred but have not yet been reported to us. We principally use the incurred Bornhuetter-Ferguson actuarial method ("BF method") to arrive at our loss reserve estimates for each line of business. This method estimates the reserves based on our initial expected loss ratio and expected reporting patterns for losses. Because we have a limited number of years of loss experience compared to the period over which we expect losses to be reported, we use industry and peer-group data, in addition to our own data, as a basis for selecting our expected reporting patterns. Since the incurred BF method does not directly use reported losses in the estimation of IBNR, it is less sensitive to our level of reported losses than other actuarial methods. This method avoids some of the distortions that could result from a large loss development factor

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being applied to a small base of reported losses to calculate ultimate losses. However, this method will react more slowly than some other loss development methods if reported loss experience deviates significantly from our expected losses.

Our Reserve Committee consists of our Chief Actuary, Chief Executive Officer, Chief Operating Officer and Chief Financial Officer. The Reserve Committee meets quarterly to review the actuarial recommendations made by the Chief Actuary. In establishing the actuarial recommendation for the reserves for losses and loss adjustment expenses, our actuary estimates an initial expected ultimate loss ratio for our statutory lines of business by accident year. Input from our underwriting and claims departments, including premium pricing assumptions and historical experience, is considered by our actuary in estimating the initial expected loss ratios. During each quarter, the Reserve Committee reviews the emergence of actual losses relative to expectations by line of business to assess whether the assumptions used in the reserving process continue to form a reasonable basis for the projection of liabilities for those product lines. Our reserving methodology uses a loss reserving model that calculates a point estimate for our ultimate losses. Although we believe that our assumptions and methodology are reasonable, our ultimate payments may vary, potentially materially, from the estimates we have made.

In addition, we retain an independent external actuary annually to assist us in determining if the reserve levels are reasonable. The independent actuary is not involved in the establishment and recording of our loss reserve. The actuarial consulting firm prepares its own estimate of our reserves for loss and loss adjustment expenses, and we compare their estimate to the reserves for losses and loss adjustment expenses reviewed and approved by the Reserve Committee in order to gain additional comfort on the adequacy of those reserves.

The table below quantifies the impact of potential reserve deviations from our carried reserve at December 31, 2020. We applied sensitivity factors to incurred losses for the three most recent accident years and to the carried reserve for all prior accident years combined. We believe that potential changes such as these would not have a material impact on our liquidity.

				December 31, 2020				Potential Impact on 2020
Sensitivity	Accident Year	Net Ultimate Loss and LAE Sensitivity Factor		Net Ultimate Incurred Losses and LAE		Net Loss and LAE Reserve		Pre-tax income		Stockholders' Equity
	($ in thousands)
Sample increases	2020	10.0	%	$	277,140	$	249,475	$	(27,714)	$	(21,894)
	2019	5.0	%	168,445		128,656		(8,422)		(6,653)
	2018	2.5	%	120,304		71,297		(3,008)		(2,376)
	Prior	2.5	%			102,855		(2,571)		(2,031)
Sample decreases	2020	(10.0)	%	277,140		249,475		27,714		21,894
	2019	(5.0)	%	168,445		128,656		8,422		6,653
	2018	(2.5)	%	120,304		71,297		3,008		2,376
	Prior	(2.5)	%			102,855		2,571		2,031

Reserve development

The amount by which estimated losses differ from those originally reported for a period is known as "development." Development is unfavorable when the losses ultimately settle for more than the amount reserved or subsequent estimates indicate a basis for reserve increases on unresolved claims. Development is favorable when losses ultimately settle for less than the amount reserved or subsequent estimates indicate a basis for reducing loss reserves

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on unresolved claims. We reflect favorable or unfavorable development of loss reserves in the results of operations in the period the estimates are changed.

During the year ended December 31, 2020, our net incurred losses for accident years 2019 and prior developed favorably by $13.3 million. This favorable development included $10.5 million for the 2019 accident year and $1.8 million for the 2018 accident year, which was primarily due to reported losses emerging at a lower level than expected, largely across the other liability and excess lines of business.

During the year ended December 31, 2019, our net incurred losses for accident years 2018 and prior developed favorably by $9.4 million. This favorable development included $13.0 million for the 2018 accident year and $1.6 million for the 2017 accident year, which was primarily due to reported losses emerging at a lower level than expected, across most lines of business. The favorable development was offset in part by adverse development of $5.2 million for accident years 2015 and prior, primarily attributable to the other liability occurrence statutory line of business. This adverse development largely resulted from management’s decision to lengthen the actuarial loss development factors in certain lines to provide for emergence of reported losses over a longer period of time based on observed trends.

Investments

Fair value measurements

Like other accounting estimates, fair value measurements may be based on subjective information and generally involve uncertainty and judgment. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not acting under duress. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. The three levels of the fair value hierarchy are described below:

Level 1 - Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets.

Level 2 - Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs.

Level 3 - Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement.

When the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. Thus, a Level 3 fair value measurement may include inputs that are observable (Level 1 and 2) and unobservable (Level 3). The use of valuation methodologies may require a significant amount of judgment. During periods of financial market disruption, including periods of rapidly widening credit spreads or illiquidity, it may be difficult to value certain of our securities if trading becomes less frequent or market data becomes less observable. We review the fair value hierarchy classifications on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification for certain financial assets and liabilities.

Fair values of our investment portfolio are estimated using unadjusted prices obtained by our investment accounting vendor from nationally recognized third-party pricing services, where available. For securities where we are unable

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to obtain fair values from a pricing service or broker, fair values are estimated using information obtained from our investment accounting vendor. We perform several procedures to ascertain the reasonableness of investment values included in the consolidated financial statements at December 31, 2020, including (1) obtaining and reviewing the internal control report from our investment accounting vendor that obtain fair values from third party pricing services, (2) discussing with our investment accounting vendor their process for reviewing and validating pricing obtained from outside pricing services and (3) reviewing the security pricing received from our investment accounting vendor and monitoring changes in unrealized gains and losses at the individual security level.

Investment securities are subject to fluctuations in fair value due to changes in issuer-specific circumstances, such as credit rating, and changes in industry-specific circumstances, such as movements in credit spreads based on the market’s perception of industry risks. In addition, fixed maturities are subject to fluctuations in fair value due to changes in interest rates. As a result of these potential fluctuations, it is possible to have significant unrealized gains or losses on a security.

Reinsurance

We enter into reinsurance contracts to limit our exposure to potential large losses and to provide additional capacity for growth. Reinsurance refers to an arrangement in which a company called a reinsurer agrees in a contract (often referred to as a treaty) to assume specified risks written by an insurance company (known as a ceding company) by paying the insurance company all or a portion of the insurance company's losses arising under specified classes of insurance policies in return for a share in premiums.

Reinsurance recoverables recorded on insurance losses ceded under reinsurance contracts are subject to judgments and uncertainties similar to those involved in estimating gross loss reserves. In addition to these uncertainties, our reinsurance recoverables may prove uncollectible if the reinsurers are unable or unwilling to perform under the reinsurance contracts. In establishing our reinsurance allowance for amounts deemed uncollectible, we evaluate the financial condition of our reinsurers and monitor concentration of credit risk arising from our exposure to individual reinsurers. To determine if an allowance is necessary, we consider, among other factors, published financial information, reports from rating agencies, payment history, collateral held and our legal right to offset balances recoverable against balances we may owe. Our reinsurance allowance for doubtful accounts is subject to uncertainty and volatility due to the time lag involved in collecting amounts recoverable from reinsurers. Over the period of time that losses occur, reinsurers are billed and amounts are ultimately collected, economic conditions, as well as the operational and financial performance of particular reinsurers may change and these changes may affect the reinsurers’ willingness and ability to meet their contractual obligations to us. It is difficult to fully evaluate the impact of major catastrophic events on the financial stability of reinsurers, as well as the access to capital that reinsurers may have when such events occur. The ceding of insurance does not legally discharge us from our primary liability for the full amount of the policies, and we will be required to pay the loss and bear the collection risk if any reinsurer fails to meet its obligations under the reinsurance contracts. We target reinsurers with A.M. Best financial strength ratings of "A" (Excellent) or better. Based on our evaluation of the factors discussed above, the allowance for uncollectible reinsurance was $0.3 million at December 31, 2020. See Note 1 to the consolidated financial statements – Recently adopted accounting pronouncements - ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) for additional information.

Recent Accounting Pronouncements

Refer to Note 1 – "Summary of significant accounting policies" of the Notes to Consolidated Financial Statements for further discussion.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Market risk is the risk of economic losses due to adverse changes in the estimated fair value of a financial instrument as the result of changes in interest rates, equity prices, foreign currency exchange rates and commodity prices. The primary components of market risk affecting us are credit risk, interest rate risk, and equity rate risk. We do not have significant exposure to foreign currency exchange rate risk or commodity risk.

Credit risk

Credit risk is the potential loss resulting from adverse changes in an issuer's ability to repay its debt obligations. We have exposure to credit risk as a holder of fixed-maturity investments. Our risk management strategy and investment policy are to primarily invest in debt instruments of high credit quality issuers and to limit the amount of credit exposure with respect to particular ratings categories and any one issuer. At December 31, 2020, our fixed-maturity portfolio, including cash equivalents, had an average rating of "AA-," with approximately 81.6% of securities in that portfolio rated "A" or better by at least one nationally recognized rating organization. Our policy is to invest in investment grade securities and to minimize investments in fixed maturities that are unrated or rated below investment grade. At December 31, 2020, approximately 3.8% of our fixed-maturity portfolio, excluding cash equivalents, was unrated or rated below investment grade. We monitor the financial condition of all of the issuers of fixed-maturity securities in our portfolio.

In addition, we are subject to credit risk with respect to our third-party reinsurers. Although our third-party reinsurers are obligated to reimburse us to the extent we cede risk to them, we are ultimately liable to our policyholders on all risks we have ceded. As a result, reinsurance contracts do not limit our ultimate obligations to pay claims covered under the insurance policies we issue and we might not collect amounts recoverable from our reinsurers. We address this credit risk by selecting reinsurers that have an A.M. Best rating of "A" (Excellent) or better at the time we enter into the agreement and by performing, along with our reinsurance broker, periodic credit reviews of our reinsurers. If one of our reinsurers suffers a credit downgrade, we may consider various options to lessen the risk of asset impairment, including commutation, novation and letters of credit.

Interest rate risk

Interest rate risk is the risk that we will incur economic losses due to adverse changes in interest rates. The primary market risk to the investment portfolio is interest rate risk associated with investments in fixed-maturity securities and nonredeemable preferred stock. Fluctuations in interest rates have a direct effect on the market valuation of these securities. When market interest rates rise, the fair value of our fixed-maturity securities and nonredeemable preferred stock decreases. Conversely, as interest rates fall, the fair value of our fixed-maturity securities and nonredeemable preferred stock increases. We manage this interest rate risk by investing in securities with varied maturity dates and by managing the duration of our investment portfolio to the duration of our reserves. Expressed in years, duration is the weighted average payment period of cash flows, where the weighting is based on the present value of the cash flows. We set duration targets for our fixed-maturity investment portfolios after consideration of the estimated duration of our liabilities and other factors. The effective weighted average duration of the portfolio, including cash equivalents, was 4.3 years as of December 31, 2020.

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We had fixed-maturity securities and nonredeemable preferred stock with a fair value of $1.1 billion at December 31, 2020 and $753.4 million at December 31, 2019 that were subject to interest rate risk. The table below illustrates the sensitivity of the fair value of our fixed-maturity securities and nonredeemable preferred stock to selected hypothetical changes in interest rates as of December 31, 2020 and 2019.

	December 31, 2020						December 31, 2019
	Estimated Fair Value		Estimated Change in Fair Value		Estimated % Increase (Decrease) in Fair Value		Estimated Fair Value		Estimated Change in Fair Value		Estimated % Increase (Decrease) in Fair Value
	($ in thousands)
200 basis points increase	$	1,009,976	$	(103,436)	(9.3)	%	$	683,376	$	(69,987)	(9.3)	%
100 basis points increase	$	1,060,970	$	(52,442)	(4.7)	%	$	718,181	$	(35,182)	(4.7)	%
No change	$	1,113,412	$	—	—	%	$	753,363	$	—	—	%
100 basis points decrease	$	1,146,035	$	32,623	2.9	%	$	786,285	$	32,922	4.4	%
200 basis points decrease	$	1,158,171	$	44,759	4.0	%	$	811,447	$	58,084	7.7	%

Changes in interest rates will have an immediate effect on comprehensive income and stockholders’ equity but will not ordinarily have an immediate effect on net income. Actual results may differ from the hypothetical change in market rates assumed in this disclosure. This sensitivity analysis does not reflect the results of any action that we may take to mitigate such hypothetical losses in fair value.

Equity risk

Equity risk represents the potential economic losses due to adverse changes in equity security prices. A portion of our portfolio is invested in ETF securities, which have historically produced higher long-term returns relative to fixed-maturity investments. As of December 31, 2020, approximately 7.6% of the fair value of our investment portfolio (including cash and cash equivalents) was invested in ETF securities. We manage equity price risk of our equity portfolio primarily through asset allocation techniques.

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Item 8. Financial Statements and Supplementary Data

INDEX TO FINANCIAL STATEMENTS

	Page
Audited Consolidated Financial Statements
Management's Report on Internal Control Over Financial Reporting	66
Reports of Independent Registered Public Accounting Firm	66
Consolidated Balance Sheets as of December 31, 2020 and 2019	70
Consolidated Statements of Income and Comprehensive Income for the Years Ended December 31, 2020, 2019 and 2018	71
Consolidated Statements of Changes in Stockholders' Equity for the Years Ended December 31, 2020, 2019 and 2018	72
Consolidated Statements of Cash Flows for the Years Ended December 31, 2020, 2019 and 2018	73
Notes to Consolidated Financial Statements	74
Schedule I - Summary of Investments - Other than Investments in Related Parties	101
Schedule II - Condensed Financial Information of Registrant - Parent Company Only	102
Schedule V - Valuation and Qualifying Accounts	107

Schedules other than those listed are omitted for the reason that they are not required, are not applicable or that equivalent information has been included in the financial statements or notes thereto or elsewhere herein.

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Management's Report on Internal Control Over Financial Reporting:

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Management does not expect that its internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Internal control over financial reporting is a process that involves human diligence and compliance and is subject to lapses in judgment and breakdowns resulting from human failures. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. The design of any system of internal control over financial reporting also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.

Management evaluated the effectiveness of our internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Management reviewed the results of its assessment with the Audit Committee of our Board of Directors. Based on our evaluation, we have concluded that we maintained effective internal control over financial reporting as of December 31, 2020.

KPMG LLP, our independent registered public accounting firm, has issued an opinion on the effectiveness of the Company's internal control over financial reporting, as stated in their report which is included herein.

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Kinsale Capital Group, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Kinsale Capital Group, Inc. and subsidiaries’ (the Company) internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2020 and 2019, the related consolidated statements of income and comprehensive income, changes in stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2020, and the related notes and financial statement schedules I, II, and V (collectively, the consolidated financial statements), and our report dated February 25, 2021 expressed an unqualified opinion on those consolidated financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the

66

U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

Richmond, Virginia

February 25, 2021

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Kinsale Capital Group, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Kinsale Capital Group, Inc. and subsidiaries (the Company) as of December 31, 2020 and 2019, the related consolidated statements of income and comprehensive income, changes in stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2020, and the related notes and financial statement schedules I, II, and V (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the years in the three‑year period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 25, 2021 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgment. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Reserves for unpaid losses and loss adjustment expenses

As described in Notes 1 and 7 to the consolidated financial statements, the Company records reserves for unpaid losses and loss adjustment expenses (reserves), which represent the Company’s best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. This estimate is based on an actuarial method that uses the Company’s initial expected loss ratios, expected reporting patterns for losses based on historical Company and industry data, and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves are adjusted as necessary. As of December 31, 2020, the Company recorded $636.0 million of reserves for unpaid losses and loss adjustment expenses.

We identified the evaluation of the estimation of reserves as a critical audit matter. The evaluation of the Company’s best estimate of reserves required complex auditor judgment due to the inherent uncertainty in the ultimate amount and timing of claim payments and required specialized actuarial skills and knowledge. In addition, the evaluation of

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the ultimate expected loss assumptions required subjective auditor judgment due to the Company’s limited historical claims data and, therefore, also involved a consideration of industry data.

The following are the primary procedures we performed to address this critical audit matter. We evaluated the design and tested the operating effectiveness of certain internal controls related to the Company’s reserving process. These included internal controls over the actuarial method and certain assumptions used to derive the Company’s best estimate of reserves and the comparison of the Company’s best estimate to the annual independent actuarial reserve estimate performed by an external consulting actuary. We also involved actuarial professionals with specialized skills and knowledge, who assisted in:

•comparing the actuarial methodology the Company used to determine the reserves to generally accepted actuarial standards and practices

•comparing certain assumptions about future claim reporting amounts and payment patterns to the Company’s underlying historical claims data and industry data, such as loss development trends of similar insurance products

•assessing the Company’s internal actuarial analysis for all lines of business by reviewing the assumptions and actuarial method used, which included the selection of loss development factors and the actuarial method, considering internal and external factors

•performing independent estimates of reserves for each line of business, using a combination of the Company’s underlying historical claims data and industry data

•developing an independent range of reserves using both the Company’s underlying historical claims data and industry data with respect to future claim reporting amounts and payment patterns and prior year independent selected loss rates

•assessing the position of the Company’s recorded reserves within this independent range in the current year and comparing to its relative position in the prior year.

/s/ KPMG LLP

We have served as the Company’s auditor since 2009.

Richmond, Virginia

February 25, 2021

69

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

	December 31,
	2020		2019
	(in thousands, except share and per share data)
Assets
Fixed-maturity securities available-for-sale, at fair value (amortized cost: $1,031,817 at 2020; $714,817 at 2019)	$	1,081,800	$	729,532
Equity securities, at fair value (cost: $98,758 in 2020; $64,245 in 2019)	129,662		78,294
Total investments	1,211,462		807,826
Cash and cash equivalents	77,093		100,408
Investment income due and accrued	6,637		4,743
Premiums receivable, net	48,641		34,483
Reinsurance recoverables	93,215		72,574
Ceded unearned premiums	24,265		16,118
Deferred policy acquisition costs, net of ceding commissions	31,912		23,564
Intangible assets	3,538		3,538
Deferred income tax asset, net	—		3,374
Other assets	50,133		23,922
Total assets	$	1,546,896	$	1,090,550
Liabilities and Stockholders' Equity
Reserves for unpaid losses and loss adjustment expenses	$	636,013	$	460,058
Unearned premiums	260,986		187,374
Payable to reinsurers	12,672		7,151
Accounts payable and accrued expenses	13,651		12,366
Credit facility	42,570		16,744
Deferred income tax liability, net	4,648		—
Other liabilities	118		977
Total liabilities	970,658		684,670
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value, 400,000,000 shares authorized, 22,757,251 shares issued and outstanding at December 31, 2020; 22,205,665 shares issued and outstanding at December 31, 2019	228		222
Additional paid-in capital	291,315		229,229
Retained earnings	243,315		162,911
Accumulated other comprehensive income	41,380		13,518
Stockholders’ equity	576,238		405,880
Total liabilities and stockholders’ equity	$	1,546,896	$	1,090,550

See accompanying notes to consolidated financial statements.

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KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Income and Comprehensive Income

	Year Ended December 31,
	2020		2019		2018
	(in thousands, except per share data)
Revenues:
Gross written premiums	$	552,814	$	389,694	$	275,538
Ceded written premiums	(74,595)		(47,633)		(39,924)
Net written premiums	478,219		342,061		235,614
Change in unearned premiums	(65,465)		(59,080)		(22,926)
Net earned premiums	412,754		282,981		212,688
Net investment income	26,110		20,133		15,688
Change in fair value of equity securities	16,855		12,389		(6,555)
Net realized investment gains	3,533		359		281
Other income	634		26		12
Total revenues	459,886		315,888		222,114
Expenses:
Losses and loss adjustment expenses	263,802		169,563		128,041
Underwriting, acquisition and insurance expenses	94,296		70,217		53,425
Other expenses	1,375		57		168
Total expenses	359,473		239,837		181,634
Income before income taxes	100,413		76,051		40,480
Income tax expense	11,994		12,735		6,693
Net income	88,419		63,316		33,787
Other comprehensive income (loss):
Change in unrealized gains (losses) on available-for-sale investments, net of taxes	27,862		14,774		(5,469)
Total comprehensive income	$	116,281	$	78,090	$	28,318

Earnings per share:
Basic	$	3.96	$	2.94	$	1.60
Diluted	$	3.87	$	2.86	$	1.56
Weighted-average shares outstanding:
Basic	22,319		21,528		21,090
Diluted	22,852		22,136		21,685

See accompanying notes to consolidated financial statements.

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KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity

		Shares of Common Stock	Common Stock		Additional Paid-in Capital		Retained Earnings		Accumu- lated Other Compre- hensive Income (Loss)		Total Stockholders' Equity
	( in thousands, except for per share data)
Balance at December 31, 2017		21,036	$	210	$	155,082	$	73,502	$	9,395	$	238,189
Cumulative effect adjustment - unrealized gains on equity securities, net of tax		—	—		—		6,490		(6,490)		—
Balance at December 31, 2017, as adjusted		21,036	210		155,082		79,992		2,905		238,189
Reclassification of tax effect of TCJA		—	—		—		(1,308)		1,308		—
Issuance of common stock under stock-based compensation plan		206	2		1,806		—		—		1,808
Stock-based compensation expense		—	—		1,597		—		—		1,597
Dividends declared ($0.28 per share)		—	—		—		(5,926)		—		(5,926)
Other comprehensive loss, net of income taxes		—	—		—		—		(5,469)		(5,469)
Net income		—	—		—		33,787		—		33,787
Balance at December 31, 2018		21,242	212		158,485		106,545		(1,256)		263,986
Issuance of common stock, net of issuance costs		742	8		65,871		—		—		65,879
Issuance of common stock under stock-based compensation plan		229	2		2,748		—		—		2,750
Stock-based compensation expense		—	—		2,742		—		—		2,742
Restricted shares withheld for taxes		(7)	—		(617)		—		—		(617)
Dividends declared ($0.32 per share)		—	—		—		(6,950)		—		(6,950)
Other comprehensive income, net of income taxes		—	—		—		—		14,774		14,774
Net income		—	—		—		63,316		—		63,316
Balance at December 31, 2019		22,206	222		229,229		162,911		13,518		405,880
Adoption of new accounting standard for credit losses, net		—	—		—		78		—		78
Issuance of common stock, net of issuance costs		311	3		56,695		—		—		56,698
Issuance of common stock under stock-based compensation plan		252	3		3,619		—		—		3,622
Stock-based compensation expense		—	—		3,575		—		—		3,575
Restricted shares withheld for taxes		(12)	—		(1,803)		—		—		(1,803)
Dividends declared ($0.36 per share)		—	—		—		(8,093)		—		(8,093)
Other comprehensive income, net of income taxes		—	—		—		—		27,862		27,862
Net income		—	—		—		88,419		—		88,419
Balance at December 31, 2020		22,757	$	228	$	291,315	$	243,315	$	41,380	$	576,238

See accompanying notes to consolidated financial statements.

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KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Operating activities:
Net income	$	88,419	$	63,316	$	33,787
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized (gains) losses on equity securities	(16,855)		(12,389)		6,555
Net realized investment gains	(3,533)		(359)		(281)
Deferred tax expense (benefit)	616		(125)		(3,230)
Depreciation and amortization	1,574		682		631
Stock compensation expense	3,575		2,742		1,597
Change in operating assets and liabilities:
Investment income due and accrued	(1,894)		(960)		(706)
Premiums receivable, net	(14,158)		(10,230)		(4,466)
Reserves for unpaid loss and loss adjustment expenses	175,955		90,906		53,435
Unearned premiums	73,612		59,124		25,140
Reinsurance balances, net	(23,267)		(13,246)		(8,070)
Deferred policy acquisition costs	(8,348)		(8,763)		(3,026)
Income taxes (recoverable) payable	(1,611)		1,221		18
Accounts payable and accrued expenses	3,087		2,972		464
Other	2,802		3,466		2,132
Net cash provided by operating activities	279,974		178,357		103,980
Investing activities:
Purchase of property and equipment	(32,875)		(19,622)		(1,273)
Sale of property and equipment	5,077		—		—
Purchases – fixed-maturity securities	(530,732)		(306,203)		(194,989)
Purchases – equity securities	(36,822)		(29,887)		(12,656)
Sales – fixed-maturity securities	119,749		35,526		10,427
Sales – equity securities	2,367		21,459		2,429
Maturities and calls – fixed-maturity securities	93,803		67,934		89,522
Net cash used in investing activities	(379,433)		(230,793)		(106,540)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	56,698		65,879		—
Proceeds from credit facility	25,700		17,300		—
Debt issuance costs	—		(628)		—
Payroll taxes withheld and remitted on share-based payments	(1,803)		(617)		—
Common stock issued, stock options exercised	3,622		2,750		1,808
Dividends paid	(8,073)		(6,929)		(5,906)
Net cash provided by (used in) financing activities	76,144		77,755		(4,098)
Net change in cash and cash equivalents	(23,315)		25,319		(6,658)
Cash and cash equivalents at beginning of year	100,408		75,089		81,747
Cash and cash equivalents at end of year	$	77,093	$	100,408	$	75,089

See accompanying notes to consolidated financial statements.

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Kinsale Capital Group, Inc. and subsidiaries

Notes to consolidated financial statements

Description of business

Kinsale Capital Group, Inc., an insurance holding company, is a Delaware corporation that was formed in 2009 and conducts its operations through its wholly-owned subsidiaries ("KCGI" and together with its subsidiaries, the "Company"). Kinsale Capital Group, Inc. writes excess and surplus lines insurance on a non-admitted basis principally through its insurance subsidiary, Kinsale Insurance Company ("Kinsale Insurance"), which is authorized to write business in 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands. Kinsale Capital Group, Inc. also markets certain products through its subsidiary, Aspera Insurance Services, Inc. ("Aspera"), an insurance broker.

1.Summary of significant accounting policies

Principles of consolidation

The accompanying consolidated financial statements include the accounts of Kinsale Capital Group, Inc. and its wholly-owned subsidiaries (referred to as "Kinsale" or, with its subsidiaries, the "Company"). All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Use of estimates

The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management periodically reviews its estimates and assumptions. These reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses, allowance for doubtful accounts and uncollectible reinsurance, fair value of investments, as well as evaluating the investment portfolio for credit impairments.

Cash and cash equivalents

The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents.

Short-term investments

Short-term investments are carried at cost, which approximates fair value. Short-term investments have maturities greater than three months but less than one year at the date of purchase. There were no short-term investments at December 31, 2020 or December 31, 2019.

Fixed-maturity and equity securities

Fixed-maturity securities are classified as available-for-sale and reported at fair value. Unrealized gains and losses on these securities are excluded from net earnings but are recorded as a separate component of other comprehensive income and stockholders' equity, net of deferred income taxes.

Equity securities are reported at fair value. Changes in unrealized gains and losses in fair value of these investments are recognized in net income.

The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. See Note 2 for further discussion of credit losses.

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Interest on fixed-maturity securities is credited to earnings as it accrues. Premiums and discounts are amortized or accreted using the effective interest method over the lives of the related fixed maturities, or to the earliest call date for securities purchased at a premium. Dividends on equity securities are included in earnings on the ex-dividend date. Realized gains and losses on disposition of investments are based on specific identification of the investments sold on the trade date.

Reinsurance

Reinsurance premiums, commissions, and ceded unearned premiums on reinsured business are accounted for on a basis consistent with that used in accounting for the original policies issued and the terms of the reinsurance contracts. The Company receives ceding commissions in accordance with certain reinsurance treaties. The ceding commissions are capitalized and amortized as a reduction of underwriting, acquisition and insurance expenses.

Reinsurance recoverables represent paid losses and loss adjustment expenses and reserves for unpaid losses and loss adjustment expenses ceded to reinsurers that are subject to reimbursement under reinsurance treaties. The method for determining reinsurance recoverables for unpaid losses and loss adjustment expenses involves reviewing actuarial estimates of gross unpaid losses and loss adjustment expenses to determine the Company's ability to cede unpaid losses and loss adjustment expenses under the Company's existing reinsurance contracts. This method is continually reviewed and updated and any resulting adjustments are reflected in earnings in the period identified. See Note 8 for a further discussion of the Company's reinsurance program.

Premiums receivable, net

Premiums receivable balances are carried at face value, net of any allowance for doubtful accounts. The allowance for doubtful accounts represents an estimate of amounts considered uncollectible based on the Company’s assessment of the collectability of receivables that are past due. The Company recorded an allowance for doubtful accounts of $3.1 million and $2.7 million at December 31, 2020 and 2019, respectively, and believes that all other amounts due are collectible.

Deferred policy acquisition costs, net of ceding commissions

The Company defers commissions, net of ceding commissions, and certain other costs that are directly related to the successful acquisition of insurance contracts. All eligible costs are capitalized and charged to expense in proportion to premium earned over the estimated policy life. To the extent that unearned premiums on existing policies are not adequate to cover the related costs and expenses, referred to as a premium deficiency, deferred policy acquisition costs are charged to earnings. The Company considers anticipated investment income in determining whether a premium deficiency exists.

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives range from 39 years for the parking deck and building, 15 to 20 years for land improvements, 7 to 10 years for furniture and equipment, 3 to 7 years for electronic data processing hardware and software, and from 2 to 5 years for leasehold improvements, which is the shorter of the estimated useful life or the lease term.

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Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following:

	December 31,
	2020		2019
	(in thousands)
Building	$	31,675	$	—
Parking deck	5,072		—
Land	3,068		—
Equipment	2,770		2,353
Software	4,815		2,356
Furniture and fixtures	1,731		1,025
Leasehold improvements	—		984
Land improvements	317		—
Construction in progress - corporate headquarters	—		19,789
	49,448		26,507
Accumulated depreciation	(3,262)		(3,873)
Total property and equipment, net	$	46,186	$	22,634

At December 31, 2019, construction in progress includes the purchased land and capitalized expenses related to the construction of the new corporate headquarters' building and parking deck. During 2020, the construction of the headquarters and parking deck was substantially completed and the related fixed assets were placed into service.

During 2020, the Company sold a portion of both the land and parking deck for approximately $6.5 million to a real estate developer for the development of an apartment building. At December 31, 2020, the Company received $5.0 million of the proceeds from the sale and is expected to receive the remaining $1.5 million upon completion of the apartment building. This receivable is included in "other assets" on the accompanying consolidated balance sheet.

Intangible assets

Intangible assets are recorded at fair value at the date of acquisition. The Company's intangible assets are comprised solely of indefinite-lived intangible assets, which arose from regulatory approvals granted by the various state insurance departments to write insurance business in the respective states on a non-admitted basis. In accordance with U.S. GAAP, amortization of indefinite-lived intangible assets is not permitted. Indefinite-lived intangible assets are tested for impairment during the fourth quarter on an annual basis, or earlier if there is reason to suspect that their values may have been diminished or impaired. There were no impairments recognized in 2020, 2019, or 2018. In addition, as of December 31, 2020, no triggering events occurred that suggested an updated review was necessary.

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses represent management's best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. The estimates are based on an actuarial method that uses management’s initial expected loss ratios, expected reporting patterns for losses based on industry data and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves for unpaid losses and loss adjustment expenses are adjusted as necessary. Such adjustments are reflected in the results of operations in the period in which they are determined. Although management believes that the reserves for losses and loss adjustment expenses are reasonable, due to the inherent uncertainty in estimating reserves for unpaid losses and loss adjustment expenses, it is possible that the Company’s actual incurred losses and loss adjustment expenses will not develop in a manner consistent with the assumptions inherent in the determination of these reserves. If actual liabilities exceed recorded amounts, there will be an increase to the Company’s reserves resulting in a reduction in net income and stockholders’ equity in the period in which the deficiency is identified. Furthermore, management may determine that recorded reserves are more than adequate to cover expected losses which will result in a reduction to the reserves. The

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Company believes that the reserves for unpaid losses and loss adjustment expenses at December 31, 2020 and 2019 are adequate and represent a reasonable estimate of the Company's future obligations. See Note 7 for a further discussion of reserves for unpaid losses and loss adjustment expenses.

Revenue recognition

Premiums are recognized as revenue ratably over the term of the insurance contracts, net of ceded reinsurance. Unearned premiums are calculated on a daily pro rata basis.

Income taxes

Deferred income tax assets and liabilities are determined based on the difference between the recorded amounts and the tax bases of assets and liabilities, using enacted tax rates expected to be in effect during the year in which the basis differences reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded when it is more likely than not that some portion, or all, of the deferred tax assets will not be realizable. Management evaluates the realizability of the deferred tax assets and assesses the need for any valuation allowance adjustment. Valuation allowances on deferred tax assets are estimated based on the Company's assessment of the realizability of such amounts.

The Company provides for uncertain tax positions, and the related interest and penalties, based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. To the extent that the anticipated tax outcome of these uncertain tax positions changes, such changes in estimate will impact the income tax provision in the period in which such determination is made. The Company recognizes accrued interest and penalties related to uncertain tax positions as a component of income tax expense.

The Company uses the portfolio approach to release stranded tax effects in accumulated other comprehensive income ("AOCI") related to its available-for-sale fixed-maturity securities. Under this approach, stranded tax effects remaining in AOCI are released only when the entire portfolio of the available-for-sale fixed-maturity securities are liquidated, sold or extinguished.

Commitments and contingencies

Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

Fair value of financial instruments

The fair values of certain financial instruments are determined based on the fair value hierarchy. U.S. GAAP guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance also describes three levels of inputs that may be used to measure fair value.

The following was considered in the estimation of fair value for each class of financial instruments for which it was practicable to estimate that value. The Company’s investment accounting vendor uses independent pricing vendors to estimate the fair value of fixed-maturity securities and the Company’s management reviews these prices for reasonableness. U.S. Treasury securities that have quoted prices in active markets are included in the amounts disclosed as Level 1. For other fixed-maturity securities, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these fixed-maturity securities are included in the amounts disclosed as Level 2. For those fixed-maturity securities where significant inputs are unobservable, Level 3 inputs, the Company's investment accounting vendor obtains valuations from pricing vendors using the market approach and income approach valuation techniques.

For equity securities, the Company’s investment accounting vendor uses prices from independent pricing vendors to estimate fair value. The fair value estimates of exchange traded funds are based on quoted prices in an active market and

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are disclosed as Level 1. The fair value estimates of preferred stock are based on observable market data and, as a result, are disclosed as Level 2.

Fair value disclosures for investments are included in Notes 2 and 3.

Stock-based compensation

Stock-based compensation is expensed based upon the estimated fair value of employee stock awards. Compensation cost for awards of equity instruments to employees is measured based on the grant-date fair value of those awards and compensation expense is recognized over the service period that the awards vest. Forfeitures of stock-based compensation awards are recognized as they occur. See Note 9 for further discussion and related disclosures regarding stock-based compensation.

Recently adopted accounting pronouncements

Accounting Standards Update ("ASU") 2016-13, Financial Instruments – Credit Losses (Topic 326)

On June 16, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. The update requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected by means of an allowance for credit losses that runs through net income. Credit losses relating to available-for-sale fixed-maturity securities must also be recorded through an allowance for credit losses. However, the amendments limit the amount of the allowance to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under previous U.S. GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. The FASB has issued additional ASUs on Topic 326 that do not change the core principle of the guidance in ASU 2016-13 but clarify certain aspects of it.

Effective January 1, 2020, the Company adopted this ASU using the modified-retrospective approach and recorded a cumulative effect adjustment to beginning retained earnings. The adoption of this ASU resulted in the recognition of an allowance for credit loss related to the Company’s reinsurance recoverables. However, since the Company enters into contracts with reinsurers that have A.M. Best ratings of “A” (Excellent) or better, the allowance was not material to the Company’s consolidated financial statements.

ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

On August 29, 2018, the FASB issued new guidance on a customer's accounting for implementation, set-up and other up-front costs incurred in a cloud computing arrangement hosted by the vendor. The new guidance requires an entity to determine the stage of a project that the implementation activity relates to and the nature of the associated costs in order to determine whether those costs should be expensed as incurred or capitalized. The new guidance also requires the entity to amortize the capitalized implementation costs as an expense over the term of the hosting arrangement. Effective January 1, 2020, the Company adopted ASU 2018-15 using a modified-retrospective approach. The adoption of ASU 2018-15 did not have a material impact on the Company's consolidated financial statements.

Prospective accounting pronouncements

ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other existing guidance to simplify several other income tax accounting matters. The updated guidance is effective for annual reporting periods beginning after December 15, 2020. Early adoption is permitted. The adoption of the guidance will not have a material effect on the Company’s consolidated financial statements.

There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company's consolidated financial statements.

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2.     Investments

Available-for-sale investments

The following tables summarize the Company’s available-for-sale investments at December 31, 2020 and 2019:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	14,792	$	(67)	$	230,906
Corporate and other securities	294,854		21,840		(86)		316,608
Asset-backed securities	236,813		4,230		(382)		240,661
Commercial mortgage-backed securities	66,110		4,886		(27)		70,969
Residential mortgage-backed securities	217,859		4,938		(141)		222,656
Total fixed-maturity investments	$	1,031,817	$	50,686	$	(703)	$	1,081,800

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	110	$	2	$	—	$	112
Obligations of states, municipalities and political subdivisions	166,312		7,542		(961)		172,893
Corporate and other securities	180,287		4,736		(255)		184,768
Asset-backed securities	141,123		1,272		(471)		141,924
Commercial mortgage-backed securities	54,627		1,658		(239)		56,046
Residential mortgage-backed securities	172,358		1,819		(388)		173,789
Total fixed-maturity investments	$	714,817	$	17,029	$	(2,314)	$	729,532

Available-for-sale investments in a loss position

The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. The Company considers a number of factors in completing its review of credit losses, including the extent to which a security's fair value has been below cost and the financial condition of an issuer. In addition to specific issuer information, the Company also evaluates the current market and interest rate environment. Generally, a change in a security’s value caused by a change in the market or interest rate environment does not constitute a credit loss.

For fixed-maturity securities, the Company also considers whether it intends to sell the security or if it is more likely than not that it will be required to sell the security before recovery and the ability to recover all amounts outstanding when contractually due. When assessing whether it intends to sell a fixed-maturity security or if it is likely to be required to sell a fixed-maturity security before recovery of its amortized cost, the Company evaluates facts and circumstances including, but not limited to, decisions to reposition the investment portfolio, potential sales of investments to meet cash flow needs and potential sales of investments to capitalize on favorable pricing.

For fixed-maturity securities where a decline in fair value is below the amortized cost basis and the Company intends to sell the security, or it is more likely than not that the Company will be required to sell the security before recovery of its

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amortized cost, an impairment is recognized in net income based on the fair value of the security at the time of assessment. For fixed-maturity securities that the Company does not intend to sell or for which it is more likely than not that the Company would not be required to sell before recovery of its amortized cost, the Company compares the estimated present value of the cash flows expected to be collected to the amortized cost of the security. The extent to which the estimated present value of the cash flows expected to be collected is less than the amortized cost of the security represents the credit-related portion of the impairment, which is recognized in net income through an allowance for credit losses. Any remaining decline in fair value represents the noncredit portion of the impairment, which is recognized in other comprehensive income. Beginning on January 1, 2020, credit losses are recognized through an allowance account. See Note 1 - Recently adopted accounting pronouncements - ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) for additional information.

The Company reports investment income due and accrued separately from fixed-maturity securities, available for sale, and has elected not to measure an allowance for credit losses for investment income due and accrued. Investment income due and accrued is written off through net realized gains (losses) on investments at the time the issuer of the bond defaults or is expected to default on payments.

The following tables summarize gross unrealized losses and estimated fair value for available-for-sale investments by length of time that the securities have continuously been in an unrealized loss position:

	December 31, 2020
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	6,412	$	(67)	$	—	$	—	$	6,412	$	(67)
Corporate and other securities	3,829		(86)		—		—		3,829		(86)
Asset-backed securities	57,750		(149)		23,825		(233)		81,575		(382)
Commercial mortgage-backed securities	4,971		(27)		—		—		4,971		(27)
Residential mortgage-backed securities	46,869		(129)		266		(12)		47,135		(141)
Total fixed-maturity investments	$	119,831	$	(458)	$	24,091	$	(245)	$	143,922	$	(703)

At December 31, 2020, the Company held 60 fixed-maturity securities with a total estimated fair value of $143.9 million and gross unrealized losses of $0.7 million. Of those securities, 12 were in a continuous unrealized loss position for greater than one year. As discussed above, the Company regularly reviews all fixed-maturity securities within its investment portfolio to determine whether a credit loss has occurred. Based on the Company's review as of December 31, 2020, unrealized losses were caused by interest rate changes or other market factors and were not credit-specific issues. At December 31, 2020, 81.6% of the Company’s fixed-maturity securities were rated "A-" or better and all of Company's fixed-maturity securities made expected coupon payments under the contractual terms of the securities. Based on its review, the Company concluded that there were no credit losses from fixed-maturity securities with unrealized losses for the year ended December 31, 2020.

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	December 31, 2019
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	28,997	$	(961)	$	254	$	—	$	29,251	$	(961)
Corporate and other securities	22,409		(251)		1,509		(4)		23,918		(255)
Asset-backed securities	21,371		(79)		44,115		(392)		65,486		(471)
Commercial mortgage-backed securities	16,352		(224)		2,508		(15)		18,860		(239)
Residential mortgage-backed securities	36,986		(148)		24,815		(240)		61,801		(388)
Total fixed-maturity investments	$	126,115	$	(1,663)	$	73,201	$	(651)	$	199,316	$	(2,314)

Contractual maturities of available-for-sale fixed-maturity securities

The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at December 31, 2020 are summarized, by contractual maturity, as follows:

	Amortized		Estimated
	Cost		Fair Value
	(in thousands)
Due in one year or less	$	15,545	$	15,782
Due after one year through five years	107,150		115,390
Due after five years through ten years	156,958		169,711
Due after ten years	231,382		246,631
Asset-backed securities	236,813		240,661
Commercial mortgage-backed securities	66,110		70,969
Residential mortgage-backed securities	217,859		222,656
Total fixed maturities	$	1,031,817	$	1,081,800

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties, and the lenders may have the right to put the securities back to the borrower.

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Net investment income

The following table presents the components of net investment income:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Interest:
Taxable bonds	$	20,493	$	14,853	$	9,474
Municipal bonds (tax exempt)	3,618		3,692		4,298
Cash equivalents and short-term investments	262		842		1,017
Dividends on equity securities	3,512		2,136		2,014
Gross investment income	27,885		21,523		16,803
Investment expenses	(1,775)		(1,390)		(1,115)
Net investment income	$	26,110	$	20,133	$	15,688

Realized investment gains and losses

The following table presents realized investment gains and losses:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Fixed-maturity securities:
Realized gains	$	4,022	$	567	$	263
Realized losses	(383)		(79)		(17)
Net realized gains from fixed-maturity securities	3,639		488		246
Equity securities:
Realized gains	—		556		57
Realized losses	(119)		(688)		(22)
Net realized (losses) gains from equity securities	(119)		(132)		35
Short-term securities - realized gains	13		3		—
Net realized investment gains	$	3,533	$	359	$	281

Change in net unrealized gains (losses) on investments

The change in net unrealized gains for fixed-maturity securities was $35.3 million and $18.7 million for the years ended December 31, 2020 and 2019, respectively. The change in net unrealized losses for fixed-maturity securities was $6.9 million for the year ended December 31, 2018.

Insurance – statutory deposits

The Company had invested assets with a carrying value of $6.9 million on deposit with state regulatory authorities at both December 31, 2020 and 2019.

3.     Fair value measurements

Fair value is estimated for each class of financial instrument for which it was practical to estimate fair value. Fair value is defined as the price in the principal market that would be received for an asset or paid to transfer a liability to facilitate an orderly transaction between market participants on the measurement date. Market participants are assumed to be

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independent, knowledgeable, able and willing to transact an exchange and not acting under duress. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value.

The three levels of the fair value hierarchy are defined as follows:

Level 1 - Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets.

Level 2 - Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs.

Level 3 - Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement.

Fair values of the Company's investment portfolio are estimated using unadjusted prices obtained by its investment accounting vendor from nationally recognized third-party pricing services, where available. Values for U.S. Treasury and exchange traded funds are generally based on Level 1 inputs which use quoted prices in active markets for identical assets. For other fixed-maturity securities and preferred stock, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these investments are included in the amounts disclosed as Level 2. For those investments where significant inputs are unobservable, the Company's investment accounting vendor obtains valuations from pricing vendors or brokers using the market approach and income approach valuation techniques and are disclosed as Level 3.

Management performs several procedures to ascertain the reasonableness of investment values included in the consolidated financial statements at December 31, 2020 and 2019, including 1) obtaining and reviewing internal control reports from the Company's investment accounting vendor that assess fair values from third party pricing services, 2) discussing with the Company's investment accounting vendor its process for reviewing and validating pricing obtained from third party pricing services and 3) reviewing the security pricing received from the Company's investment accounting vendor and monitoring changes in unrealized gains and losses at the individual security level. The Company has evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs.

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The following tables present the balances of assets measured at fair value on a recurring basis as of December 31, 2020 and 2019, by level within the fair value hierarchy.

	December 31, 2020
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	—	$	230,906	$	—	$	230,906
Corporate and other securities	—		316,608		—		316,608
Asset-backed securities	—		240,661		—		240,661
Commercial mortgage-backed securities	—		70,969		—		70,969
Residential mortgage-backed securities	—		222,656		—		222,656
Total fixed maturities	—		1,081,800		—		1,081,800
Equity securities:
Exchange traded funds	98,050		—		—		98,050
Nonredeemable preferred stock	—		31,612		—		31,612
Total equity securities	98,050		31,612		—		129,662
Total	$	98,050	$	1,113,412	$	—	$	1,211,462

	December 31, 2019
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	112	$	—	$	—	$	112
Obligations of states, municipalities and political subdivisions	—		172,893		—		172,893
Corporate and other securities	—		184,768		—		184,768
Asset-backed securities	—		141,924		—		141,924
Commercial mortgage-backed securities	—		56,046		—		56,046
Residential mortgage-backed securities	—		173,789		—		173,789
Total fixed maturities	112		729,420		—		729,532
Equity securities:
Exchange traded funds	54,463		—		—		54,463
Nonredeemable preferred stock	—		23,831		—		23,831
Total equity securities	54,463		23,831		—		78,294
Total	$	54,575	$	753,251	$	—	$	807,826

There were no assets or liabilities measured at fair value on a nonrecurring basis as of December 31, 2020 or 2019.

The carrying value of cash equivalents approximates its fair value at December 31, 2020 and 2019, due to the short-term maturities of these assets. In addition, the estimated fair value of the Credit Facility approximated its carrying value as of December 31, 2020 and 2019. See Note 11 for further information regarding the Credit Facility.

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4.     Deferred policy acquisition costs

The following table presents the amounts of policy acquisition costs deferred and amortized for the years ended:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Balance, beginning of year	$	23,564	$	14,801	$	11,775
Policy acquisition costs deferred:
Direct commissions	80,682		56,841		40,546
Ceding commissions	(18,879)		(12,373)		(11,239)
Other underwriting and policy acquisition costs	4,478		3,727		3,141
Policy acquisition costs deferred	66,281		48,195		32,448
Amortization of net policy acquisition costs	(57,933)		(39,432)		(29,422)
Balance, end of year	$	31,912	$	23,564	$	14,801

Amortization of net policy acquisition costs is included in the line item "Underwriting, acquisition and insurance expenses" in the accompanying consolidated statements of income and comprehensive income.

5.     Underwriting, acquisition and insurance expenses

Underwriting, acquisition and insurance expenses consist of the following:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Underwriting, acquisition and insurance expenses incurred:
Direct commissions	$	69,922	$	48,382	$	36,885
Ceding commissions	(16,145)		(12,347)		(10,448)
Other operating expenses	40,519		34,182		26,988
Total	$	94,296	$	70,217	$	53,425

Other operating expenses within underwriting, acquisition and insurance expenses included salaries, employee benefits and bonus expense of $35.9 million, $27.8 million and $19.7 million, for the years ended December 31, 2020, 2019 and 2018, respectively.

6.     Income taxes

The Company’s subsidiaries file a consolidated U.S. federal income tax return. Under a tax sharing agreement, KCGI collects from or refunds to its subsidiaries the amount of taxes determined as if KCGI and the subsidiaries filed separate returns. The Company is no longer subject to income tax examination by tax authorities for the years ended before January 1, 2017.

The Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was enacted on March 27, 2020. The purpose of the CARES Act is to provide emergency assistance and health care response for individuals, families, and businesses affected by the 2020 coronavirus pandemic. The CARES Act builds on and clarifies a number of changes in corporate tax law implemented by the Tax Cuts and Jobs Act. The CARES Act will not have a significant impact on the Company's consolidated financial statements.

Income tax expense includes the following components for the years ending December 31, 2020, 2019 and 2018:

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	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Current federal income tax expense	$	11,378	$	12,860	$	9,923
Deferred federal income tax (benefit) expense	616		(125)		(3,230)
Income tax expense	$	11,994	$	12,735	$	6,693

The Company paid $13.0 million, $11.6 million and $9.9 million in federal income taxes during the years ended December 31, 2020, 2019 and 2018, respectively. Current income taxes recoverable was $1.2 million at December 31, 2020, and included in "other assets" in the accompanying consolidated balance sheets. Current income taxes payable was $0.4 million at December 31, 2019, and included in "other liabilities" in the accompanying consolidated balance sheets.

The prevailing federal income tax rate was 21% in 2020, 2019 and 2018. The Company’s effective income tax rate on income before income taxes differs from the prevailing federal income tax rate and is summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Income tax expense at federal income tax rate	$	21,087	$	15,971	$	8,501
Stock options exercised	(7,634)		(2,411)		(918)
Tax-exempt investment income	(565)		(577)		(672)
Restricted stock award vesting	(658)		(153)		—
Other	(236)		(95)		(218)
Total	$	11,994	$	12,735	$	6,693

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The significant components of the net deferred tax (liability) asset are summarized as follows:

	December 31,
	2020		2019
	(in thousands)
Deferred tax assets:
Unpaid losses and loss adjustment expenses	$	11,736	$	8,199
Unearned premiums	9,942		7,193
Organizational costs	128		162
Stock compensation	865		765
State operating loss carryforwards	3,833		1,497
Allowance for doubtful accounts	649		570
Other	126		256
Deferred tax assets before allowance	27,279		18,642
Less: valuation allowance	(3,491)		(1,592)
Total deferred tax assets	23,788		17,050
Deferred tax liabilities:
Unrealized gains on fixed-maturity securities	10,497		3,090
Unrealized gains on equity securities	6,552		2,995
Deferred policy acquisition costs, net of ceding commissions	6,701		4,949
Property and equipment	2,433		10
Intangible assets	743		743
Transition adjustment for loss reserve discount	1,281		1,537
Other	229		352
Total deferred tax liabilities	28,436		13,676
Net deferred tax (liability) asset	$	(4,648)	$	3,374

At December 31, 2020 and 2019, the Company had state net operating losses ("NOLs") of $80.9 million and $31.6 million, respectively. The state NOLs are available to offset future taxable income or reduce taxes payable and begin expiring in 2029. 

Management evaluates the need for a valuation allowance related to its deferred tax assets. At December 31, 2020 and 2019, the Company recorded a tax valuation allowance equal to the state NOLs and the deferred tax assets, net of existing deferred tax liabilities that were expected to reverse in future periods, related to certain state jurisdictions. No other valuation allowances were established against the Company’s deferred tax assets at December 31, 2020 and 2019, as the Company believes that it is more likely than not that the remaining deferred tax assets will be realized given the carry back availability, reversal of existing temporary differences and future taxable income.

The Company did not have any material uncertain tax positions in 2020 or 2019. Management is not aware of any events that would give rise to any uncertain tax positions.

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7.     Reserves for unpaid losses and loss adjustment expenses

The reserves for unpaid losses and loss adjustment expenses represent the Company's estimated ultimate cost of all unreported and reported but unpaid insured claims and the cost to adjust these losses that have occurred as of or before the balance sheet date. Reserves are estimated using individual case-basis valuations of reported claims and statistical analyses. Case reserves are established for individual claims that have been reported to the Company, typically by the Company's insureds or their brokers. Based on the information provided, case reserves are established by estimating the ultimate losses from the claim, including defense costs associated with the ultimate settlement of the claim. Incurred-but-not-reported ("IBNR") reserves are determined using actuarial methods to estimate losses that have occurred but have not yet been reported to the Company. The incurred Bornhuetter-Ferguson actuarial method ("BF method") is used to arrive at the Company's loss reserve estimates for each line of business. This method estimates the reserves based on the initial expected loss ratio and expected reporting patterns for losses. Because the Company has a limited number of years of loss experience compared to the period over which losses are expected to be reported, the Company uses industry and peer-group data, in addition to its own data, as a basis for selecting its expected reporting patterns.

As part of the reserving process, the Company reviews historical data and considers the effect of various factors on claims development patterns including polices written on a "claims made" versus "occurrence" basis. Policies written on a claims made basis provide coverage to the insured only for losses incurred during the coverage period, and only if the claim was reported during a specified reporting period. Policies written on an occurrence basis provide coverage to the insured for liabilities arising from events occurring during the term of the policy, regardless of when a claim is actually made. Accordingly, claims related to policies written on an occurrence basis may arise many years after a policy has lapsed. Property losses, while written on an occurrence basis, are generally reported within a short time from the date of loss, and in most instances, property claims are settled and paid within a relatively short period of time.

The following table presents a reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses:

	December 31,
	2020		2019		2018
	(in thousands)
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	$	460,058	$	369,152	$	315,717
Less: reinsurance recoverable on unpaid losses	69,792		55,389		48,224
Adoption of new accounting standard for credit losses	(282)		—		—
Net reserves for unpaid losses and loss adjustment expenses, beginning of year	390,548		313,763		267,493
Incurred losses and loss adjustment expenses:
Current year	277,140		178,986		135,078
Prior year	(13,338)		(9,423)		(7,037)
Total net losses and loss adjustment expenses incurred	263,802		169,563		128,041
Payments:
Current year	27,664		19,054		14,118
Prior year	74,403		74,006		67,653
Total payments	102,067		93,060		81,771
Net reserves for unpaid losses and loss adjustment expenses, end of year	552,283		390,266		313,763
Reinsurance recoverable on unpaid losses, net of allowance	83,730		69,792		55,389
Gross reserves for unpaid losses and loss adjustment expenses, end of year	$	636,013	$	460,058	$	369,152

During the year ended December 31, 2020, our net incurred losses for accident years 2019 and prior developed favorably by $13.3 million. This favorable development included $10.5 million for the 2019 accident year and $1.8 million for accident year 2018. This favorable development was primarily due to reported losses emerging at a lower level than expected, largely across the

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other liability and excess lines of business. Current year incurred losses and loss adjustment expenses for the year ended December 31, 2020 included $23.2 million of catastrophe losses primarily related to Hurricane Laura, Hurricane Sally and the California wildfires.

During the year ended December 31, 2019, our net incurred losses for accident years 2018 and prior developed favorably by $9.4 million. This favorable development included $13.0 million for the 2018 accident year and $1.6 million for the 2017 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, on the other liability and products liability lines of business. The favorable development was offset by adverse development of $5.2 million for the 2011 through 2015 accident years. The unfavorable development was primarily attributable to the other liability occurrence line of business. This adverse development largely resulted from management’s decision to lengthen the actuarial loss development factors to provide for emergence of reported losses over a longer period of time based on trends observed in loss experience, which added a modest amount of conservatism to the Company’s IBNR reserves.

During the year ended December 31, 2018, our net incurred losses for accident years 2017 and prior developed favorably by $7.0 million. This favorable development included $6.8 million for the 2017 accident year, $3.8 million for the 2016 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, across most lines of business. The favorable development was offset in part by adverse development of $3.6 million for the 2011 through 2015 accident years. The unfavorable development was primarily attributable to the other liability occurrence line of business.

Incurred and Paid Claims Development

The following is information about incurred and paid claims development as of December 31, 2020, net of reinsurance, as well as cumulative claim frequency and the total of IBNR liabilities plus expected development on reported claims included within the net incurred claims amounts. The development and claims duration tables below exclude commuted multi-line quota-share reinsurance treaty ("MLQS") contracts, which would distort development patterns related to those transactions. Cumulative number of reported claims is reported on a per claim basis.

The information about incurred and paid claims development for the years ended December 31, 2011 to December 31, 2019, is presented as unaudited supplementary information.

Property

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,										As of December 31, 2020
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
	($ in thousands)
2016	$	4,177	$	3,392	$	3,301	$	3,278	$	3,270	$	—	286
2017			12,473		11,705		11,676		11,631		19		1,041
2018					11,559		12,004		12,698		88		649
2019							14,914		13,909		430		636
2020									40,612		7,139		2,189
							Total		$	82,120

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	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
	($ in thousands)
2016	$	1,867	$	3,257	$	3,265	$	3,265	$	3,270
2017			9,938		11,233		11,602		11,608
2018					9,132		11,646		12,599
2019							9,852		12,581
2020									19,897
							Total		59,955
			All outstanding liabilities before 2016, net of reinsurance						—
			Liabilities for claims and claim adjustment expenses, net of reinsurance						$	22,165

Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5
Property	66.9	%	23.3	%	3.6	%	—	%	0.2	%

Casualty - Claims Made

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	4,246	$	3,844	$	3,646	$	3,609	$	3,560	$	3,374	$	3,261	$	3,225	$	3,206	$	3,177	$	73	76
2012			7,913		5,749		4,205		3,102		2,845		2,477		2,314		2,207		2,136		190		138
2013					15,238		11,639		9,113		7,917		7,002		6,463		6,128		6,087		465		228
2014							18,847		14,289		11,748		11,217		10,948		10,988		10,620		824		273
2015									18,883		16,777		14,896		13,583		13,942		13,548		1,378		258
2016											19,170		14,693		14,675		14,322		13,583		2,116		310
2017													18,116		17,097		16,120		15,794		3,703		369
2018															22,429		20,234		18,612		7,275		458
2019																	34,693		29,056		17,500		538
2020																			55,630		48,966		738
																	Total		$	168,243

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	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	139	$	1,037	$	1,392	$	2,116	$	3,044	$	3,042	$	3,042	$	3,065	$	3,104	$	3,104
2012			153		475		877		1,024		1,090		1,882		1,946		1,946		1,946
2013					499		1,915		4,436		5,070		5,320		5,439		5,482		5,612
2014							435		1,865		5,039		6,385		8,290		9,415		9,491
2015									217		4,496		7,563		9,238		11,372		11,522
2016											1,158		3,015		6,907		9,839		11,381
2017													340		4,897		8,252		10,484
2018															507		5,030		8,931
2019																	2,487		6,005
2020																			1,002
																	Total		69,478
	All outstanding liabilities before 2011, net of reinsurance																		9
	Liabilities for claims and claim adjustment expenses, net of reinsurance																		$	98,774

Casualty - Occurrence

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	5,839	$	5,940	$	5,757	$	7,340	$	7,613	$	8,142	$	8,375	$	9,023	$	9,379	$	9,318	$	360	227
2012			16,977		17,436		18,803		20,401		20,579		22,001		22,401		23,223		23,197		1,288		586
2013					30,616		28,771		28,037		29,039		31,731		33,248		33,973		33,128		2,978		856
2014							47,805		40,668		38,049		36,678		39,313		41,859		42,434		5,843		1,196
2015									59,717		51,739		49,122		52,100		54,697		54,090		9,323		1,496
2016											61,440		55,680		53,549		55,534		57,401		13,928		1,434
2017													71,126		67,151		68,985		70,641		24,096		1,632
2018															86,157		78,331		78,386		44,307		1,606
2019																	112,266		109,994		81,322		1,644
2020																			154,619		146,945		1,076
																	Total		$	633,208

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	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	207	$	1,596	$	2,519	$	3,788	$	4,575	$	6,363	$	6,868	$	8,510	$	8,693	$	8,745
2012			757		4,441		7,850		11,238		14,382		16,474		19,383		20,707		21,408
2013					1,099		4,469		7,957		14,890		21,348		26,715		28,248		29,610
2014							698		3,081		8,489		17,576		23,771		31,026		34,338
2015									941		3,161		12,685		28,385		37,690		41,724
2016											1,099		6,015		17,225		28,924		34,437
2017													1,581		9,352		22,407		37,736
2018															2,638		10,995		22,860
2019																	3,944		16,687
2020																			2,400
																	Total		249,945
					All outstanding liabilities before 2011, net of reinsurance														46
			Liabilities for claims and claim adjustment expenses, net of reinsurance																$	383,309

Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5		6		7		8		9		10
Casualty - claims made	4.9	%	21.2	%	24.3	%	14.4	%	13.6	%	10.1	%	1.1	%	1.0	%	0.6	%	—	%
Casualty - occurrence	2.5	%	10.3	%	14.8	%	20.2	%	13.8	%	13.8	%	7.6	%	9.1	%	2.5	%	0.6	%

Reconciliation of Incurred and Paid Claims Development to the Liability for Unpaid Claims and Claim Adjustment Expenses

The reconciliation of the net incurred and paid claims development tables to the liability for unpaid claims and claim adjustment expenses in the consolidated statement of financial position is as follows:

(in thousands)	December 31, 2020
Net outstanding liabilities
Property	$	22,165
Casualty - claims made	98,774
Casualty - occurrence	383,309
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	504,248
Reinsurance recoverable on unpaid claims
Property	10,800
Casualty - claims made	61,100
Casualty - occurrence	11,830
Total reinsurance recoverable on unpaid claims	83,730
Unallocated claims adjustment expenses	48,035
Gross liability for unpaid claims and claim adjustment expense	$	636,013

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8.     Reinsurance

The Company purchases reinsurance from other insurance companies ("reinsurers") in order to limit its exposure to large losses and enable it to underwrite policies with sufficient limits to meet policyholder needs. In a reinsurance transaction, an insurance company transfers, or cedes, part or all of its exposure to the reinsurer that receives a portion of the premium. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policy coverage, and therefore the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement.

The following table summarizes the effect of reinsurance on premiums written and earned:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Written:
Direct	$	552,814	$	389,569	$	275,538
Assumed	—		125		—
Ceded	(74,595)		(47,633)		(39,924)
Net written	$	478,219	$	342,061	$	235,614
Earned:
Direct	$	479,181	$	330,464	$	250,397
Assumed	21		104		—
Ceded	(66,448)		(47,587)		(37,709)
Net earned	$	412,754	$	282,981	$	212,688

Incurred losses and loss adjustment expenses were net of reinsurance recoverables (ceded incurred losses and loss adjustment expenses) of $42.0 million, $27.2 million and $25.5 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Reinsurance balances

The following table presents reinsurance recoverables on paid and unpaid losses as of December 31, 2020 and 2019:

	December 31, 2020		December 31, 2019
	(in thousands)
Reinsurance recoverables on paid losses	$	9,485	$	2,782
Reinsurance recoverables on unpaid losses	83,730		69,792
Reinsurance recoverables	$	93,215	$	72,574

Credit risk exists with reinsurance ceded to the extent that any reinsurer is unable to meet the obligations assumed under the reinsurance agreements. Allowances are established for amounts deemed uncollectible. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk arising from its exposure to individual reinsurers. All reinsurance receivables are from companies with A.M. Best ratings of "A" (Excellent) or better. To further reduce credit exposure to reinsurance recoverable balances, the Company has received letters of credit from certain reinsurers that are not authorized as reinsurers under U.S. state insurance regulations. After adoption of ASU 2016-13, the Company recorded an allowance for doubtful accounts of $0.3 million related to its reinsurance balances at December 31, 2020; however, the deterioration in the credit quality of existing reinsurers or disputes over reinsurance agreements could result in future charges. See Note 1 - Recently adopted accounting pronouncements - ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) for additional information. The Company did not record an allowance for doubtful accounts related to its reinsurance balances at December 31, 2019 and believed this was appropriate after consideration of all currently available information.

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At December 31, 2020, reinsurance recoverables on paid and unpaid losses from the Company’s five largest reinsurers were $26.3 million, $19.7 million, $11.9 million, $8.6 million and $6.5 million, representing 78.4% of the total balance.

At December 31, 2020, prepaid reinsurance premiums ceded to five reinsurers were $6.1 million, $4.0 million, $2.7 million, $2.4 million and $2.3 million, representing 71.8% of the total balance.

9.     Stockholders’ equity

Capital Stock

The Company’s authorized capital stock consists of 400,000,000 shares of common stock, par value $0.01 per share, and 100,000,000 shares of preferred stock, par value $0.01 per share. There were no shares of preferred stock issued or outstanding at December 31, 2020 or 2019.

Public Offerings

On August 7, 2020, the Company completed an underwritten public offering and sold and issued 310,500 shares of its common stock at a price of $190.00 per share. After deducting underwriting discounts and commissions and offering expenses, the Company received net proceeds of $56.7 million. The proceeds from the public offering were used for general corporate purposes, including to fund organic growth.

On August 12, 2019, the Company completed an underwritten public offering and sold and issued 741,750 shares of its common stock at a price of $93.00 per share. After deducting underwriter discounts and commissions and offering expenses, the Company received net proceeds from the offering of approximately $65.9 million.

Equity-based Compensation

On July 27, 2016, the Kinsale Capital Group, Inc. 2016 Omnibus Incentive Plan (the "2016 Incentive Plan") became effective. The 2016 Incentive Plan, which is administered by the Compensation, Nominating and Corporate Governance Committee of the Company's Board of Directors, provides for grants of stock options, restricted stock, restricted stock units and other stock-based awards to officers, employees, directors, independent contractors and consultants. The number of shares of common stock available for issuance under the 2016 Incentive Plan may not exceed 2,073,832.

The Company recognized total equity-based compensation expense of $3.6 million, $2.7 million and $1.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Stock Options

On July 27, 2016, the Board of Directors approved, and the Company granted, 1,036,916 stock options with an exercise price equal to the initial public offering price of $16.00 per share. The options have a maximum contractual term of 10 years and vested in 4 equal annual installments following the date of the grant. The weighted average grant date fair value of options granted during 2016 was $2.71 per share.

The value of the options granted was estimated at the date of grant using the Black-Scholes pricing model using the following assumptions:

Risk-free rate of return	1.26	%
Dividend yield	1.25	%
Expected share price volatility(1)	18.50	%
Expected life in years(2)	6.3 years

(1)     Expected volatility was based on the Company’s competitors within the industry.

(2)     Expected life was calculated using the simplified method, which was an average of the contractual term of the option and its ordinary vesting period, as the Company did not have sufficient historical data for determining the expected term of our stock option awards.

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A summary of option activity as of December 31, 2020, and changes during the year then ended is presented below:

	Number of Shares	Weighted-average exercise price		Weighted-average remaining years of contractual life	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2019	614,345	$	16.00
Granted	—	—
Forfeited	(234)	16.00
Exercised	(226,373)	16.00
Outstanding at December 31, 2020	387,738	$	16.00	5.6	$	71,394
Exercisable at December 31, 2020	387,738	$	16.00	5.6	$	71,394

The total intrinsic value of options exercised was $37.0 million during the year ended December 31, 2020 and $11.9 million during the year ended December 31, 2019.

Restricted Stock Awards

During 2020, the Board of Directors approved, and the Company granted, restricted stock awards under the 2016 Incentive Plan. The restricted stock awards were valued on the date of grant and will vest over a period of 1 to 4 years corresponding to the anniversary date of the grants. The fair value of restricted stock awards was determined based on the closing trading price of the Company’s common stock on the grant date or, if no common stock was traded on the grant date, the last preceding date for which there was a sale of common stock. Except for restrictions placed on the transferability of restricted stock, holders of unvested restricted stock have full stockholder’s rights, including voting rights and the right to receive cash dividends. Unvested restricted stock awards and accrued dividends, if any, are forfeited upon the termination of service to or employment with the Company.

A summary of restricted stock activity under the equity compensation plans for the year ended is as follows:

	December 31, 2020
	Number of Shares	Weighted Average Grant Date Fair Value per Share
Nonvested outstanding at the beginning of the period	122,723	$	67.01
Granted	42,694	$	147.45
Vested	(41,010)	$	63.86
Forfeited	(16,015)	$	83.79
Nonvested outstanding at the end of the period	108,392	$	97.40

Employees surrender restricted stock awards to pay for withholding tax obligations resulting from any vesting of those awards. During the year ended December 31, 2020, restricted stock awards withheld for taxes in connection with the vesting of those awards totaled 11,966.

The weighted average grant-date fair value of the Company's restricted stock awards granted during the years ended December 31, 2020, 2019, and 2018 was $147.45, $80.59 and $52.99, respectively. The fair value of restricted stock awards that vested during the year ended December 31, 2020 and 2019 was $5.8 million and $2.1 million, respectively. There were no restricted stock awards that vested during the year ended December 31, 2018. As of December 31, 2020, the Company had $8.3 million of total unrecognized stock-based compensation expense expected to be charged to earnings over a weighted-average period of 2.8 years.

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Subsequent Events

The Board of Directors granted 3,200 restricted stock awards on January 1, 2021 under the 2016 Incentive Plan to the Company’s non-employee directors. The restricted stock awards had a fair value on the date of grant of $200.13 per share and will vest on a straight-line basis over a 1 year period.

On February 11, 2021, the Company’s Board of Directors declared a cash dividend of $0.11 per share of common stock. This dividend is payable on March 12, 2021 to all stockholders of record on February 26, 2021.

10.    Earnings per share

The following table represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements:

	Year ended December 31,
	2020		2019		2018
	(in thousands, except per share data)
Net income	$	88,419	$	63,316	$	33,787
Weighted average common shares outstanding - basic	22,319		21,528		21,090
Dilutive effect of shares issued under stock compensation arrangements:
Stock options	469		570		591
Restricted stock awards	64		38		4
Total dilutive effect of shares issued under stock compensation arrangements	533		608		595
Weighted average common shares outstanding - diluted	22,852		22,136		21,685
Earnings per common share:
Basic	$	3.96	$	2.94	$	1.60
Diluted	$	3.87	$	2.86	$	1.56

There were 35 thousand, 54 thousand and 86 thousand anti-dilutive stock awards for the years ended December 31, 2020, 2019 and 2018, respectively.

Basic earnings per share was computed by dividing the earnings attributable to the common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share was computed by dividing earnings attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period, including potentially dilutive shares of common stock for the period determined using the treasury stock method.

11.     Credit agreement

On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters but may also be used for working capital and general corporate purposes.

Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of

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0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. During the year ended December 31, 2020, the Company drew down $25.7 million on its Credit Facility. As of December 31, 2020, there was $42.6 million outstanding under the Credit Facility, net of debt issuance cost of $0.4 million, with a weighted average interest rate of 1.98%. For the year ended December 31, 2020, total interest expense under the Credit Facility was $1.0 million, of which $0.8 million was capitalized as part of the real estate project under construction. See Note 1 for further details. Interest paid was $0.8 million and $0.1 million for the years ended December 31, 2020 and 2019, respectively. There were no credit agreements outstanding at December 31, 2018.

The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2020, the Company was in compliance with all of its financial covenants under the Credit Facility.

12.     Contingencies

Contingencies arise in the normal conduct of the Company’s operations and are not expected to have a material effect on the Company’s financial condition or results of operations. However, adverse outcomes are possible and could negatively affect the Company’s financial condition and results of operations.

13.    Employee benefit plan

The Company has established a defined contribution employee retirement plan ("Plan") in accordance with Section 401(k) of the Internal Revenue Code. Expenses related to the Plan were $1.7 million, $1.3 million and $1.0 million in 2020, 2019 and 2018, respectively.

14.     Other comprehensive income (loss)

The following table summarizes the components of other comprehensive income (loss):

	Year Ending December 31,
	2020		2019		2018
	(in thousands)
Unrealized gains (losses) on fixed-maturity securities arising during the period, before income taxes:	$	37,387	$	19,190	$	(6,664)
Income tax (expense) benefit	(7,851)		(4,029)		1,399
Unrealized gains (losses) arising during the period, net of income taxes	29,536		15,161		(5,265)
Less reclassification adjustment:
Net realized investment gains on available-for-sale investments	2,119		489		258
Income tax benefit	(445)		(102)		(54)
Reclassification adjustment included in net income	1,674		387		204
Other comprehensive income (loss)	$	27,862	$	14,774	$	(5,469)

The sale of an available-for-sale security results in amounts being reclassified from accumulated other comprehensive income to realized gains or losses in current period earnings. The related tax effect of the reclassification adjustment is recorded in income tax expense in current period earnings. See Note 2 for additional information.

15.      Underwriting information

The Company has one reportable segment, the Excess and Surplus Lines Insurance segment, which primarily offers commercial excess and surplus lines liability and property insurance products through its underwriting divisions. Gross written premiums by underwriting division are presented below:

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	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Commercial:
Construction	$	87,206	$	71,035	$	50,879
Small business	83,289		63,181		44,368
Excess casualty	76,715		51,225		37,398
Commercial property	51,789		29,115		9,166
Product liability	38,306		26,333		20,049
Allied health	37,562		23,962		16,815
Life sciences	31,027		17,821		14,505
General casualty	29,205		23,279		17,625
Professional liability	27,051		20,029		16,717
Management liability	24,061		14,820		8,161
Energy	16,985		15,371		15,586
Environmental	8,568		5,179		2,205
Health care	7,666		5,963		5,725
Inland marine	6,910		3,467		2,046
Public entity	3,007		580		1,193
Commercial insurance	1,757		1,674		1,096
Total commercial	531,104		373,034		263,534
Personal:
Personal insurance	21,710		16,660		12,004
Total	$	552,814	$	389,694	$	275,538

Construction underwrites commercial general liability coverage on contractors focusing on new residential construction, residential remodeling and renovation and commercial construction.

Small business underwrites commercial general liability on smaller risks with an emphasis on artisan contractors and premises related exposures.

Excess casualty underwrites excess liability over risks that would fit within the general casualty, construction, products liability and small business divisions. Coverage is written over the Company's primary liability policies as well as those of other insurers. This division also writes excess liability over primary commercial auto liability policies written by other carriers.

Commercial property underwrites first-party coverage on manufacturing facilities, government and municipal buildings, professional buildings, offices and general commercial properties, vacant properties, as well as entertainment and retail facilities.

Products liability underwrites commercial general liability on manufacturers, distributors and importers of a wide array of consumer, commercial and industrial products.

Allied health underwrites commercial general liability, professional liability and excess liability on allied health and social service risks including assisted living facilities, home health care agencies and outpatient medical facilities.

Life sciences underwrites general liability, products liability and professional liability coverage for manufacturers, distributors and developers of dietary supplements, medical devices, pharmaceuticals, biologics, health and beauty products, durable medical equipment and clinical trials.

General casualty underwrites general liability and liquor liability on hospitality, habitational and retail risks, among others, with similar premises liability loss exposures.

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Professional liability underwrites small-to-medium sized non-medical professional liability risks. The classes of risks include accountants, architects and engineers, financial planners, insurance agents, lawyers, realtors, and certain other professions.

Management liability underwrites directors and officers liability, employment practices liability and fiduciary liability coverage on a variety of commercial and government risks.

Energy underwrites commercial general liability, pollution liability, professional liability and excess liability on enterprises engaged in the business of energy production or distribution or mining including drillers, lease operators, contractors, product manufacturers and alternative energy.

Environmental underwrites commercial general liability, pollution liability and professional liability on a wide range of commercial risks where environmental exposures exist that are operational in nature or related to the premises.

Health care underwrites medical professional liability for physicians, surgeons, dentists, chiropractors and podiatrists. Policies cover both individuals and small practice groups.

Inland marine underwrites a variety of inland marine coverages including builders risk, contractors' equipment, transportation risks and mobile equipment.

Public entity underwrites law enforcement professional liability and school board liability.

Commercial insurance underwrites commercial general liability on small accounts, through the Company's wholly-owned broker, Aspera.

Personal insurance writes homeowners coverage on manufactured homes with a catastrophe exposure due to coastal location.

The Company does business with three unaffiliated insurance brokers that generated $72.1 million, $63.8 million and $56.5 million of gross written premiums for the year ended December 31, 2020, representing 13.0%, 11.5% and 10.2% of gross written premiums, respectively. No other broker generated 10.0% or more of the gross written premiums for the year ended December 31, 2020.

16. Statutory financial information

Kinsale Insurance maintains its accounts in conformity with accounting practices prescribed or permitted by state regulatory authorities that vary in certain respects from U.S. GAAP. In converting from statutory accounting principles to U.S. GAAP, typical adjustments include deferral of policy acquisition costs, the inclusion of statutory nonadmitted assets and the inclusion of net unrealized gains or losses relating to fixed maturities in stockholders’ equity. The Company does not use any permitted practices that are different from prescribed statutory accounting practices.

Statutory net income and statutory capital and surplus for Kinsale Insurance as of December 31, 2020, 2019, and 2018 and for the years then ended are summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Statutory net income	$	54,338	$	40,917	$	34,206
Statutory capital and surplus	$	476,066	$	348,811	$	233,500

Kinsale Insurance is subject to risk-based capital ("RBC") requirements. RBC is a method developed by the National Association of Insurance Commissioners ("NAIC") to determine the minimum amount of statutory capital appropriate for an insurance company to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC is calculated using various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. The adequacy of a company’s actual capital is evaluated by a comparison to the RBC results, as determined by the formula. Companies that do not maintain statutory capital and surplus at a level in excess of the company action level RBC are required to take specified actions. At December 31, 2020 and 2019, actual statutory capital and surplus for Kinsale Insurance substantially exceeded the regulatory requirements. 

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Dividend payments to Kinsale from Kinsale Insurance are restricted by state insurance laws as to the amount that may be paid without prior approval of the regulatory authorities of Arkansas. The maximum dividend distribution is limited by Arkansas law to the greater of 10% of policyholder surplus as of December 31 of the previous year or statutory net income, not including realized capital gains, for the previous calendar year. Dividend payments are further limited to that part of available policyholder surplus which is derived from net profits on its business. The maximum dividend distribution that can be paid by Kinsale Insurance during 2021 without prior approval is $51.8 million.

17. Unaudited selected quarterly financial data

The following is a summary of the unaudited quarterly results of operations:

	2020 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	124,036	$	134,091	$	144,777	$	149,910
Total revenues	80,346		117,707		122,501		139,332
Net income	5,086		30,262		14,890		38,181
Comprehensive (loss) income	(4,137)		57,270		21,444		41,704
Earnings per share - basic	$	0.23	$	1.37	$	0.66	$	1.69
Earnings per share - diluted	$	0.22	$	1.33	$	0.65	$	1.65

	2019 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	84,626	$	94,947	$	97,984	$	112,137
Total revenues	72,185		72,572		78,327		92,804
Net income	18,720		13,767		12,976		17,853
Comprehensive income	25,500		20,322		16,218		16,050
Earnings per share - basic	$	0.88	$	0.65	$	0.60	$	0.81
Earnings per share - diluted	$	0.86	$	0.63	$	0.58	$	0.79

Due to differences in weighted average common shares outstanding, quarterly earnings per share may not add up to the totals reported for the full year.

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Schedule I

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Summary of Investments—Other than Investments in Related Parties

Type of Investment	Cost or Amortized Cost		Fair Value		Amount at which shown on Balance Sheet
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	230,906	$	230,906
Corporate and other securities	294,854		316,608		316,608
Asset-backed securities	236,813		240,661		240,661
Commercial mortgage-backed securities	66,110		70,969		70,969
Residential mortgage-backed securities	217,859		222,656		222,656
Total fixed maturities	1,031,817		1,081,800		1,081,800
Equity securities:
Exchange traded funds	68,032		98,050		98,050
Nonredeemable preferred stock	30,726		31,612		31,612
Total equity securities	98,758		129,662		129,662
Total investments	$	1,130,575	$	1,211,462	$	1,211,462

See accompanying Report of Independent Registered Public Accounting Firm.

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Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Balance Sheets (Parent Company Only)

	December 31,
	2020		2019
	(in thousands)
Assets
Cash and cash equivalents	$	8,395	$	14,726
Due from subsidiaries	7,792		16,836
Investment in subsidiaries	600,931		391,071
Deferred income tax asset, net	587		519
Income taxes recoverable	1,177		—
Other assets	290		208
Total assets	$	619,172	$	423,360
Liabilities and Stockholders' Equity
Liabilities:
Accounts payable and accrued expenses	$	302	$	260
Income taxes payable	—		434
Credit facility	42,570		16,744
Other liabilities	62		42
Total liabilities	42,934		17,480
Stockholders’ equity:
Common stock	228		222
Additional paid-in capital	291,315		229,229
Retained earnings	243,315		162,911
Accumulated other comprehensive income	41,380		13,518
Stockholders’ equity	576,238		405,880
Total liabilities and stockholders’ equity	$	619,172	$	423,360

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

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Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Statements of Income and Comprehensive Income (Parent Company Only)

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Revenues:
Management fees from subsidiaries	$	5,709	$	4,502	$	3,215
Total revenues	5,709		4,502		3,215
Expenses:
Other operating expenses	6,624		5,215		4,055
Other expenses	1,332		—		—
Total expenses	7,956		5,215		4,055
Loss before income taxes	(2,247)		(713)		(840)
Income tax benefit	(8,779)		(2,714)		(1,158)
Income before equity in net income of subsidiaries	6,532		2,001		318
Equity in net income of subsidiaries	81,887		61,315		33,469
Net income	88,419		63,316		33,787
Other comprehensive income (loss):
Equity in other comprehensive earnings (losses) of subsidiaries	27,862		14,774		(5,469)
Total comprehensive income	$	116,281	$	78,090	$	28,318

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

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Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Statements of Cash Flows (Parent Company Only)

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Operating activities
Net income	$	88,419	$	63,316	$	33,787
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred tax benefit	(68)		(150)		(170)
Stock compensation expense	3,575		2,742		1,597
Equity in undistributed earnings of subsidiaries	(81,887)		(61,315)		(33,469)
Changes in operating assets and liabilities	7,520		(14,247)		(633)
Dividends received from subsidiary	—		5,000		11,500
Net cash provided by (used in) operating activities	17,559		(4,654)		12,612
Investing activities
Contributions to subsidiary	(100,034)		(68,391)		—
Net cash used in investing activities	(100,034)		(68,391)		—
Financing activities
Common stock issued, net of transaction costs	56,698		65,879		—
Common stock issued, stock options exercised	3,622		2,750		1,808
Payroll taxes withheld and remitted on share-based payments	(1,803)		(617)		—
Dividends paid	(8,073)		(6,929)		(5,906)
Proceeds from credit facility	25,700		17,300		—
Debt issuance costs	—		(628)		—
Net cash provided by (used in) financing activities	76,144		77,755		(4,098)
Net change in cash and cash equivalents	(6,331)		4,710		8,514
Cash and cash equivalents at beginning of year	14,726		10,016		1,502
Cash and cash equivalents at end of year	$	8,395	$	14,726	$	10,016

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

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KINSALE CAPITAL GROUP, INC.

Condensed Financial Information of Registrant

Notes to Condensed Financial Information

(Parent Company Only)

1. Accounting policies

Organization

Kinsale Capital Group, Inc. (the "Company"), a Delaware domiciled insurance holding company, was formed on June 3, 2009 for the purpose of acquiring and managing insurance entities.

Basis of presentation

The accompanying condensed financial statements have been prepared using the equity method. Under the equity method, the investment in consolidated subsidiaries is stated at cost plus equity in undistributed earnings of consolidated subsidiaries since the date of acquisition. These condensed financial statements should be read in conjunction with the Company’s consolidated financial statements. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Estimates and assumptions

Preparation of the condensed financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates.

Credit agreement

On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters but may also be used for working capital and general corporate purposes.

Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. During the year ended December 31, 2020, the Company drew down $25.7 million on its Credit Facility. As of December 31, 2020, there was $42.6 million outstanding under the Credit Facility, net of debt issuance cost of $0.4 million, with a weighted average interest rate of 1.98%. For the year ended December 31, 2020, total interest expense under the Credit Facility was $1.0 million, of which $0.8 million was capitalized as part of the real estate project under construction. Interest paid was $0.8 million and $0.1 million for the years ending December 31, 2020 and 2019, respectively. There were no credit agreements outstanding at December 31, 2018.

The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2020, the Company was in compliance with all of its financial covenants under the Credit Facility.

105

Dividends from subsidiary

Cash dividends paid to Kinsale Capital Group, Inc. by its wholly-owned subsidiary, Kinsale Insurance Company, were $5.0 million for the year ended December 31, 2019, and $11.5 million for the year ended December 31, 2018. There were no cash dividends paid by the insurance subsidiary for the year ended December 31, 2020.

Commitments and contingencies

Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

106

Schedule V

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Valuation and Qualifying Accounts

			Additions		Deductions
(in thousands)	Balance at Beginning of Period (1)		Amounts Charged to Expense		Amounts Written Off or Disposals		Balance at End of Period
Year Ended December 31, 2020:
Allowance for premiums receivable	$	2,345	$	1,240	$	498	$	3,087
Valuation allowance for deferred tax assets	1,592		1,899		—		3,491
Allowance for reinsurance recoverables	282		—		—		282
Year Ended December 31, 2019:
Allowance for premiums receivable	2,615		835		745		2,705
Valuation allowance for deferred tax assets	780		812		—		1,592
Year Ended December 31, 2018:
Allowance for premiums receivable	2,112		663		160		2,615
Valuation allowance for deferred tax assets	690		90		—		780

See accompanying Report of Independent Registered Public Accounting Firm.

(1) For the year ended December 31, 2020, the balance at the beginning of period included a reduction of $0.4 million to the allowance for premiums receivable and the establishment of an allowance for reinsurance recoverables of $0.3 million, each of which related to the adoption of the new accounting standard for credit losses.

107

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in the Company’s reports under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to the Company’s management, including the Company’s President and Chief Executive Officer and the Company’s Executive Vice President, Chief Financial Officer and Treasurer, to allow timely decisions regarding required disclosures. Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. The Company’s management, with the participation of the Company's President and Chief Executive Officer and the Company’s Executive Vice President, Chief Financial Officer and Treasurer, has evaluated the effectiveness of the design and operation of the Company’s disclosure controls and procedures as of the end of the period covered by this Annual Report on Form 10-K. Based upon that evaluation, the Company’s President and Chief Executive Officer and the Company’s Executive Vice President, Chief Financial Officer and Treasurer concluded that, as of December 31, 2020, the Company’s disclosure controls and procedures were effective to accomplish their objectives at the reasonable assurance level.

Management’s Report on Internal Control over Financial Reporting

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, Management has evaluated the effectiveness of our internal control over financial reporting as of December 31, 2020. Management’s Report on Internal Control Over Financial Reporting and the report of the Company’s independent registered public accounting firm on the effectiveness of internal control over financial reporting as of December 31, 2020 are included in Part II, Item 8 of this Annual Report on Form 10-K.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting during the fourth quarter of 2020 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

Item 9B. Other Information

Not applicable.

108

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required by Item 10 is incorporated by reference to the definitive Kinsale Capital Group, Inc. Proxy Statement to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Item 11. Executive Compensation

The information required by Item 11 is incorporated by reference to the definitive Kinsale Capital Group, Inc. Proxy Statement to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by Item 12 is incorporated by reference to the definitive Kinsale Capital Group, Inc. Proxy Statement to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required by Item 13 is incorporated by reference to the definitive Kinsale Capital Group, Inc. Proxy Statement to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Item 14. Principal Accounting Fees and Services

The information required by Item 14 is incorporated by reference to the definitive Kinsale Capital Group, Inc. Proxy Statement to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

109

PART IV

Item 15. Exhibits and Financial Statement Schedules

The following consolidated financial statements of Kinsale Capital Group, Inc. and subsidiaries are filed as part of this report under Item 8 — Financial Statements and Supplementary Data:

	Page
1. Audited Consolidated Financial Statements
Management's Report on Internal Control Over Financial Reporting	66
Reports of Independent Registered Public Accounting Firm	66
Consolidated Balance Sheets as of December 31, 2020 and 2019	70
Consolidated Statements of Income and Comprehensive Income for the Years Ended December 31, 2020, 2019 and 2018	71
Consolidated Statements of Changes in Stockholders' Equity for the Years Ended December 31, 2020, 2019 and 2018	72
Consolidated Statements of Cash Flows for the Years Ended December 31, 2020, 2019 and 2018	73
Notes to Consolidated Financial Statements	74
2. Financial Statement Schedules
Schedule I - Summary of Investments - Other than Investments in Related Parties	101
Schedule II - Condensed Financial Information of Registrant - Parent Company Only	102
Schedule V - Valuation and Qualifying Accounts	107

All other financial schedules are not required under the related instructions, or are inapplicable and therefore have been omitted.

Item 16. Form 10-K Summary

None.

Exhibit Index

Exhibit Number	Description
3.1	Second Amended and Restated Certificate of Incorporation of Kinsale Capital Group, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed with the SEC on May 24, 2018)
3.2	Amended and Restated By-Laws of Kinsale Capital Group, Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed with the SEC on May 24, 2018)
4.1	Description of Securities (incorporated by reference to Exhibit 4.1 to the Company's Annual Report on Form 10-K, filed with the SEC on March 2, 2020)
10.1+	Kinsale Capital Group, Inc. 2016 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.4 to Amendment No. 1 to the Registration Statement on Form S-1, filed with the SEC on July 18, 2016)
10.1a+	Amendment to Outstanding Awards under the Kinsale Capital Group Inc. 2016 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.1a to the Company's Annual Report on Form 10-K, filed with the SEC on February 28, 2018)
10.2a+	Form of Stock Option Grant Notice and Award Agreement (Employee) (incorporated by reference to Exhibit 10.5a to Amendment No. 1 to the Registration Statement on Form S-1, filed with the SEC on July 18, 2016)
10.2b+	Form of Stock Option Grant Notice and Award Agreement (Director) (incorporated by reference to Exhibit 10.5b to Amendment No. 1 to the Registration Statement on Form S-1, filed with the SEC on July 18, 2016)
10.3+	Form of Restricted Share Award Agreement (incorporated by reference to Exhibit 10.3 to the Company's Annual Report on Form 10-K, filed with the SEC on February 28, 2018)
10.4+	Employment and Arbitration Agreement, dated as of June 4, 2009 between Kinsale Management, Inc. and Michael P. Kehoe (incorporated by reference to Exhibit 10.7 to the Registration Statement on Form S-1, filed with the SEC on July 1, 2016)
10.5	Form of Indemnification Agreement between Kinsale Capital Group, Inc. and each of its directors and executive officers (incorporated by reference to Exhibit 10.8 to Amendment No. 1 to the Registration Statement on Form S-1, filed with the SEC on July 18, 2016)
10.6	Credit Agreement, dated as of May 28, 2019, among Kinsale Capital Group, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent, and the lenders from time to time party thereto (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K, filed with the SEC on May 29, 2019)
21.1	List of subsidiaries of Kinsale Capital Group, Inc.
23.1	Consent of KPMG LLP, Independent Registered Public Accounting Firm
31.1	Certification of principal executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

*    This certification is deemed not filed for purposes of section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act.

+    Compensatory plan or arrangement

111

Signatures

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on February 25, 2021.

KINSALE CAPITAL GROUP, INC.

By: /s/ Michael P. Kehoe                                    
  Michael P. Kehoe
  President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Michael P. Kehoe
Michael P. Kehoe	President, Chief Executive Officer and Director	February 25, 2021
	(Principal Executive Officer)
/s/ Bryan P. Petrucelli
Bryan P. Petrucelli	Executive Vice President, Chief Financial Officer and Treasurer	February 25, 2021
	(Principal Financial and Accounting Officer)
/s/ Steven J. Bensinger
Steven J. Bensinger	Director	February 25, 2021
/s/ Teresa P. Chia
Teresa P. Chia	Director	February 25, 2021
/s/ Robert V. Hatcher, III
Robert V. Hatcher, III	Director	February 25, 2021
/s/ Anne C. Kronenberg
Anne C. Kronenberg	Director	February 25, 2021
/s/ Robert Lippincott III
Robert Lippincott III	Director	February 25, 2021
/s/ James J. Ritchie
James J. Ritchie	Director	February 25, 2021
/s/ Frederick L. Russell, Jr.
Frederick L. Russell, Jr.	Director	February 25, 2021
/s/ Gregory M. Share
Gregory M. Share	Director	February 25, 2021

112

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF KINSALE CAPITAL GROUP, INC.

Subsidiary	Jurisdiction of Incorporation or Formation
Kinsale Insurance Company	Arkansas
Kinsale Management, Inc.	Delaware
Aspera Insurance Services, Inc.	Virginia
Kinsale Real Estate, Inc.	Delaware
2001 Maywill, LLC	Delaware

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Kinsale Capital Group, Inc.:

We consent to the incorporation by reference in the registration statements No. 333‑233041 on Form S-3ASR and No. 333-212815 on Form S-8 of Kinsale Capital Group, Inc. of our reports dated February 25, 2021, with respect to the consolidated balance sheets of Kinsale Capital Group, Inc. and subsidiaries as of December 31, 2020 and 2019, the related consolidated statements of income and comprehensive income, changes in stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2020, and the related notes and financial statement schedules I, II, and V, and the effectiveness of internal control over financial reporting as of December 31, 2020, which reports appear in the December 31, 2020 annual report on Form 10‑K of Kinsale Capital Group, Inc.

/s/ KPMG LLP

Richmond, Virginia

February 25, 2021

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Michael P. Kehoe, certify that:

1.I have reviewed this annual report on Form 10-K of Kinsale Capital Group, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

February 25, 2021	/s/ Michael P. Kehoe
	Michael P. Kehoe
	President and Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Bryan P. Petrucelli, certify that:

1.I have reviewed this annual report on Form 10-K of Kinsale Capital Group, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

February 25, 2021	/s/ Bryan P. Petrucelli
	Bryan P. Petrucelli
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the Annual Report on Form 10-K of Kinsale Capital Group, Inc. (the "Company") for the period ended December 31, 2020 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Michael P. Kehoe, President and Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 25, 2021	/s/ Michael P. Kehoe
	Michael P. Kehoe
	President and Chief Executive Officer
	(Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the Annual Report on Form 10-K of Kinsale Capital Group, Inc. (the "Company") for the period ended December 31, 2020 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Bryan P. Petrucelli, Executive Vice President, Chief Financial Officer and Treasurer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 25, 2021	/s/ Bryan P. Petrucelli
	Bryan P. Petrucelli
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 18, 2021	Jun. 30, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	KINSALE CAPITAL GROUP, INC.
Trading Symbol	KNSL
Entity Listing, Description	Common Stock, par value $0.01
Entity Address, Address Line One	2035 Maywill Street
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23230
City Area Code	804
Local Phone Number	289-1300
Entity Incorporation, State or Country Code	DE
Entity Central Index Key	0001669162
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-37848
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		22,773,134
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Public Float			$ 3,241,859,629
Security Exchange Name	NASDAQ
Entity Tax Identification Number	98-0664337
ICFR Auditor Attestation Flag	true

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investments:
Fixed-maturity securities available-for-sale, at fair value (amortized cost: $1,031,817 at 2020; $714,817 at 2019)	$ 1,081,800	$ 729,532
Equity securities, at fair value (cost: $98,758 in 2020; $64,245 in 2019)	129,662	78,294
Total investments	1,211,462	807,826
Cash and cash equivalents	77,093	100,408
Investment income due and accrued	6,637	4,743
Premiums receivable, net	48,641	34,483
Reinsurance recoverables	93,215	72,574
Ceded unearned premiums	24,265	16,118
Deferred policy acquisition costs, net of ceding commissions	31,912	23,564
Intangible assets	3,538	3,538
Deferred income tax asset, net	0	3,374
Other assets	50,133	23,922
Total assets	1,546,896	1,090,550
Liabilities:
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	636,013	460,058
Unearned premiums	260,986	187,374
Payable to reinsurers	12,672	7,151
Accounts payable and accrued expenses	13,651	12,366
Credit facility	42,570	16,744
Deferred income tax liability, net	4,648	0
Other liabilities	118	977
Total liabilities	970,658	684,670
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 400,000,000 shares authorized, 22,757,251 shares issued and outstanding at December 31, 2020; 22,205,665 shares issued and outstanding at December 31, 2019	228	222
Additional paid-in capital	291,315	229,229
Retained earnings	243,315	162,911
Accumulated other comprehensive income	41,380	13,518
Stockholders' equity	576,238	405,880
Total liabilities and stockholders' equity	$ 1,546,896	$ 1,090,550

XML

Consolidated Balance Sheets - (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investments:
Fixed maturity securities available-for-sale, amortized cost	$ 1,031,817	$ 714,817
Equity securities - cost	$ 98,758	$ 64,245
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	22,757,251	22,205,665
Common stock, shares outstanding (in shares)	22,757,251	22,205,665

XML

Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Gross written premiums	$ 552,814	$ 389,694	$ 275,538
Ceded written premiums	(74,595)	(47,633)	(39,924)
Net written premiums	478,219	342,061	235,614
Change in unearned premiums	(65,465)	(59,080)	(22,926)
Net earned premiums	412,754	282,981	212,688
Net investment income	26,110	20,133	15,688
Change in the fair value of equity securities	16,855	12,389
Change in fair value of equity securities			(6,555)
Net realized investment gains	3,533	359	281
Other income	634	26	12
Total revenues	459,886	315,888	222,114
Expenses:
Losses and loss adjustment expenses	263,802	169,563	128,041
Underwriting, acquisition and insurance expenses	94,296	70,217	53,425
Other expenses	1,375	57	168
Total expenses	359,473	239,837	181,634
Income before income taxes	100,413	76,051	40,480
Income tax expense	11,994	12,735	6,693
Net income	88,419	63,316	33,787
Other comprehensive income (loss):
Change in unrealized gains (losses) on available-for-sale investments, net of taxes	27,862	14,774	(5,469)
Total comprehensive income	$ 116,281	$ 78,090	$ 28,318
Earnings per share:
Basic	$ 3.96	$ 2.94	$ 1.60
Diluted	$ 3.87	$ 2.86	$ 1.56
Weighted-average common shares outstanding:
Basic	22,319	21,528	21,090
Diluted	22,852	22,136	21,685

XML

Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other comprehensive income (loss):
Change in unrealized gains (losses), taxes	$ 7,406	$ 3,927	$ (1,453)

XML

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjusted Balance
Balance, shares at Dec. 31, 2017	21,036,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation, shares	206,000
Balance, shares at Dec. 31, 2018	21,242,000
Balance at Dec. 31, 2017	$ 238,189	$ 210	$ 155,082	$ 73,502			$ 9,395
Balance (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2017					$ 6,490	$ 79,992		$ (6,490)	$ 2,905
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of tax effect of TCJA | Accounting Standards Update 2018-02 [Member]				(1,308)			1,308
Issuance of stock under stock-based compensation plan	1,808	2	1,806
Stock-based compensation expense	1,597		1,597
Dividends declared	(5,926)			(5,926)
Other comprehensive income (loss), net of income tax	(5,469)						(5,469)
Net income	33,787			33,787
Balance at Dec. 31, 2018	$ 263,986	212	158,485	106,545			(1,256)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, shares	742,000
Stock-based compensation, shares	229,000
Restricted shares withheld for taxes, shares	(7,000)
Balance, shares at Dec. 31, 2019	22,205,665
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	$ 65,879	8	65,871
Issuance of stock under stock-based compensation plan	2,750	2	2,748
Stock-based compensation expense	2,742		2,742
Restricted shares withheld for taxes	(617)		(617)
Dividends declared	(6,950)			(6,950)
Other comprehensive income (loss), net of income tax	14,774						14,774
Net income	63,316			63,316
Balance at Dec. 31, 2019	$ 405,880	222	229,229	162,911			13,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, shares	311,000
Stock-based compensation, shares	252,000
Restricted shares withheld for taxes, shares	(12,000)
Balance, shares at Dec. 31, 2020	22,757,251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard for credit losses | Accounting Standards Update 2016-13 [Member]	$ 78			78
Issuance of common stock, net of issuance costs	56,698	3	56,695
Issuance of stock under stock-based compensation plan	3,622	3	3,619
Stock-based compensation expense	3,575		3,575
Restricted shares withheld for taxes	(1,803)		(1,803)
Dividends declared	(8,093)			(8,093)
Other comprehensive income (loss), net of income tax	27,862						27,862
Net income	88,419			88,419
Balance at Dec. 31, 2020	$ 576,238	$ 228	$ 291,315	$ 243,315			$ 41,380

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Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share	$ 0.36	$ 0.32	$ 0.28

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income	$ 88,419	$ 63,316	$ 33,787
Adjustments to reconcile net income to net cash provided by operating activities:
Change in the fair value of equity securities	(16,855)	(12,389)
Change in fair value of equity securities			6,555
Net investment gains	(3,533)	(359)	(281)
Deferred tax (benefit) expense	616	(125)	(3,230)
Depreciation and amortization	1,574	682	631
Stock compensation expense	3,575	2,742	1,597
Change in operating assets and liabilities:
Investment income due and accrued	(1,894)	(960)	(706)
Premiums receivable, net	(14,158)	(10,230)	(4,466)
Reserves for unpaid loss and loss adjustment expenses	175,955	90,906	53,435
Unearned premiums	73,612	59,124	25,140
Reinsurance balances, net	(23,267)	(13,246)	(8,070)
Deferred policy acquisition costs	(8,348)	(8,763)	(3,026)
Income taxes (recoverable) payable	(1,611)	1,221	18
Accounts payable and accrued expenses	3,087	2,972	464
Other	2,802	3,466	2,132
Net cash provided by operating activities	279,974	178,357	103,980
Investing Activities:
Purchase of property and equipment	(32,875)	(19,622)	(1,273)
Sale of property and equipment	5,077	0	0
Purchases - fixed-maturity securities	(530,732)	(306,203)	(194,989)
Purchases - equity securities	(36,822)	(29,887)	(12,656)
Sales - fixed-maturity securities	119,749	35,526	10,427
Sales - equity securities	2,367	21,459	2,429
Maturities and calls - fixed-maturity securities	93,803	67,934	89,522
Net cash used in investing activities	(379,433)	(230,793)	(106,540)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	56,698	65,879	0
Proceeds from credit facility	25,700	17,300	0
Debt issuance costs	0	(628)	0
Payroll taxes withheld and remitted on share-based payments	(1,803)	(617)	0
Common stock issued, stock options exercised	3,622	2,750	1,808
Dividends paid	(8,073)	(6,929)	(5,906)
Net cash provided by (used in) financing activities	76,144	77,755	(4,098)
Net change in cash and cash equivalents	(23,315)	25,319	(6,658)
Cash and cash equivalents at beginning of period	100,408	75,089	81,747
Cash and cash equivalents at end of period	$ 77,093	$ 100,408	$ 75,089

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Description of business	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of business	Description of businessKinsale Capital Group, Inc., an insurance holding company, is a Delaware corporation that was formed in 2009 and conducts its operations through its wholly-owned subsidiaries ("KCGI" and together with its subsidiaries, the "Company"). Kinsale Capital Group, Inc. writes excess and surplus lines insurance on a non-admitted basis principally through its insurance subsidiary, Kinsale Insurance Company ("Kinsale Insurance"), which is authorized to write business in 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands. Kinsale Capital Group, Inc. also markets certain products through its subsidiary, Aspera Insurance Services, Inc. ("Aspera"), an insurance broker.

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Summary of significant accounting policies

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Summary of significant accounting policies

Summary of significant accounting policies

Principles of consolidation

The accompanying consolidated financial statements include the accounts of Kinsale Capital Group, Inc. and its wholly-owned subsidiaries (referred to as "Kinsale" or, with its subsidiaries, the "Company"). All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Use of estimates

The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management periodically reviews its estimates and assumptions. These reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses, allowance for doubtful accounts and uncollectible reinsurance, fair value of investments, as well as evaluating the investment portfolio for credit impairments.

Cash and cash equivalents

The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents.

Short-term investments

Short-term investments are carried at cost, which approximates fair value. Short-term investments have maturities greater than three months but less than one year at the date of purchase. There were no short-term investments at December 31, 2020 or December 31, 2019.

Fixed-maturity and equity securities

Fixed-maturity securities are classified as available-for-sale and reported at fair value. Unrealized gains and losses on these securities are excluded from net earnings but are recorded as a separate component of other comprehensive income and stockholders' equity, net of deferred income taxes.

Equity securities are reported at fair value. Changes in unrealized gains and losses in fair value of these investments are recognized in net income.

The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. See Note 2 for further discussion of credit losses.

Interest on fixed-maturity securities is credited to earnings as it accrues. Premiums and discounts are amortized or accreted using the effective interest method over the lives of the related fixed maturities, or to the earliest call date for securities purchased at a premium. Dividends on equity securities are included in earnings on the ex-dividend date. Realized gains and losses on disposition of investments are based on specific identification of the investments sold on the trade date.

Reinsurance

Reinsurance premiums, commissions, and ceded unearned premiums on reinsured business are accounted for on a basis consistent with that used in accounting for the original policies issued and the terms of the reinsurance contracts. The Company receives ceding commissions in accordance with certain reinsurance treaties. The ceding commissions are capitalized and amortized as a reduction of underwriting, acquisition and insurance expenses.

Reinsurance recoverables represent paid losses and loss adjustment expenses and reserves for unpaid losses and loss adjustment expenses ceded to reinsurers that are subject to reimbursement under reinsurance treaties. The method for determining reinsurance recoverables for unpaid losses and loss adjustment expenses involves reviewing actuarial estimates of gross unpaid losses and loss adjustment expenses to determine the Company's ability to cede unpaid losses and loss adjustment expenses under the Company's existing reinsurance contracts. This method is continually reviewed and updated and any resulting adjustments are reflected in earnings in the period identified. See Note 8 for a further discussion of the Company's reinsurance program.

Premiums receivable, net

Premiums receivable balances are carried at face value, net of any allowance for doubtful accounts. The allowance for doubtful accounts represents an estimate of amounts considered uncollectible based on the Company’s assessment of the collectability of receivables that are past due. The Company recorded an allowance for doubtful accounts of $3.1 million and $2.7 million at December 31, 2020 and 2019, respectively, and believes that all other amounts due are collectible.

Deferred policy acquisition costs, net of ceding commissions

The Company defers commissions, net of ceding commissions, and certain other costs that are directly related to the successful acquisition of insurance contracts. All eligible costs are capitalized and charged to expense in proportion to premium earned over the estimated policy life. To the extent that unearned premiums on existing policies are not adequate to cover the related costs and expenses, referred to as a premium deficiency, deferred policy acquisition costs are charged to earnings. The Company considers anticipated investment income in determining whether a premium deficiency exists.

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives range from 39 years for the parking deck and building, 15 to 20 years for land improvements, 7 to 10 years for furniture and equipment, 3 to 7 years for electronic data processing hardware and software, and from 2 to 5 years for leasehold improvements, which is the shorter of the estimated useful life or the lease term.

Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following:

	December 31,
	2020		2019
	(in thousands)
Building	$	31,675	$	—
Parking deck	5,072		—
Land	3,068		—
Equipment	2,770		2,353
Software	4,815		2,356
Furniture and fixtures	1,731		1,025
Leasehold improvements	—		984
Land improvements	317		—
Construction in progress - corporate headquarters	—		19,789
	49,448		26,507
Accumulated depreciation	(3,262)		(3,873)
Total property and equipment, net	$	46,186	$	22,634

At December 31, 2019, construction in progress includes the purchased land and capitalized expenses related to the construction of the new corporate headquarters' building and parking deck. During 2020, the construction of the headquarters and parking deck was substantially completed and the related fixed assets were placed into service.

During 2020, the Company sold a portion of both the land and parking deck for approximately $6.5 million to a real estate developer for the development of an apartment building. At December 31, 2020, the Company received $5.0 million of the proceeds from the sale and is expected to receive the remaining $1.5 million upon completion of the apartment building. This receivable is included in "other assets" on the accompanying consolidated balance sheet.

Intangible assets

Intangible assets are recorded at fair value at the date of acquisition. The Company's intangible assets are comprised solely of indefinite-lived intangible assets, which arose from regulatory approvals granted by the various state insurance departments to write insurance business in the respective states on a non-admitted basis. In accordance with U.S. GAAP, amortization of indefinite-lived intangible assets is not permitted. Indefinite-lived intangible assets are tested for impairment during the fourth quarter on an annual basis, or earlier if there is reason to suspect that their values may have been diminished or impaired. There were no impairments recognized in 2020, 2019, or 2018. In addition, as of December 31, 2020, no triggering events occurred that suggested an updated review was necessary.

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses represent management's best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. The estimates are based on an actuarial method that uses management’s initial expected loss ratios, expected reporting patterns for losses based on industry data and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves for unpaid losses and loss adjustment expenses are adjusted as necessary. Such adjustments are reflected in the results of operations in the period in which they are determined. Although management believes that the reserves for losses and loss adjustment expenses are reasonable, due to the inherent uncertainty in estimating reserves for unpaid losses and loss adjustment expenses, it is possible that the Company’s actual incurred losses and loss adjustment expenses will not develop in a manner consistent with the assumptions inherent in the determination of these reserves. If actual liabilities exceed recorded amounts, there will be an increase to the Company’s reserves resulting in a reduction in net income and stockholders’ equity in the period in which the deficiency is identified. Furthermore, management may determine that recorded reserves are more than adequate to cover expected losses which will result in a reduction to the reserves. The

Company believes that the reserves for unpaid losses and loss adjustment expenses at December 31, 2020 and 2019 are adequate and represent a reasonable estimate of the Company's future obligations. See Note 7 for a further discussion of reserves for unpaid losses and loss adjustment expenses.

Revenue recognition

Premiums are recognized as revenue ratably over the term of the insurance contracts, net of ceded reinsurance. Unearned premiums are calculated on a daily pro rata basis.

Income taxes

Deferred income tax assets and liabilities are determined based on the difference between the recorded amounts and the tax bases of assets and liabilities, using enacted tax rates expected to be in effect during the year in which the basis differences reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded when it is more likely than not that some portion, or all, of the deferred tax assets will not be realizable. Management evaluates the realizability of the deferred tax assets and assesses the need for any valuation allowance adjustment. Valuation allowances on deferred tax assets are estimated based on the Company's assessment of the realizability of such amounts.

The Company provides for uncertain tax positions, and the related interest and penalties, based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. To the extent that the anticipated tax outcome of these uncertain tax positions changes, such changes in estimate will impact the income tax provision in the period in which such determination is made. The Company recognizes accrued interest and penalties related to uncertain tax positions as a component of income tax expense.

The Company uses the portfolio approach to release stranded tax effects in accumulated other comprehensive income ("AOCI") related to its available-for-sale fixed-maturity securities. Under this approach, stranded tax effects remaining in AOCI are released only when the entire portfolio of the available-for-sale fixed-maturity securities are liquidated, sold or extinguished.

Commitments and contingencies

Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

Fair value of financial instruments

The fair values of certain financial instruments are determined based on the fair value hierarchy. U.S. GAAP guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance also describes three levels of inputs that may be used to measure fair value.

The following was considered in the estimation of fair value for each class of financial instruments for which it was practicable to estimate that value. The Company’s investment accounting vendor uses independent pricing vendors to estimate the fair value of fixed-maturity securities and the Company’s management reviews these prices for reasonableness. U.S. Treasury securities that have quoted prices in active markets are included in the amounts disclosed as Level 1. For other fixed-maturity securities, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these fixed-maturity securities are included in the amounts disclosed as Level 2. For those fixed-maturity securities where significant inputs are unobservable, Level 3 inputs, the Company's investment accounting vendor obtains valuations from pricing vendors using the market approach and income approach valuation techniques.

For equity securities, the Company’s investment accounting vendor uses prices from independent pricing vendors to estimate fair value. The fair value estimates of exchange traded funds are based on quoted prices in an active market and

are disclosed as Level 1. The fair value estimates of preferred stock are based on observable market data and, as a result, are disclosed as Level 2.

Fair value disclosures for investments are included in Notes 2 and 3.

Stock-based compensation

Stock-based compensation is expensed based upon the estimated fair value of employee stock awards. Compensation cost for awards of equity instruments to employees is measured based on the grant-date fair value of those awards and compensation expense is recognized over the service period that the awards vest. Forfeitures of stock-based compensation awards are recognized as they occur. See Note 9 for further discussion and related disclosures regarding stock-based compensation.

Recently adopted accounting pronouncements

Accounting Standards Update ("ASU") 2016-13, Financial Instruments – Credit Losses (Topic 326)

On June 16, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. The update requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected by means of an allowance for credit losses that runs through net income. Credit losses relating to available-for-sale fixed-maturity securities must also be recorded through an allowance for credit losses. However, the amendments limit the amount of the allowance to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under previous U.S. GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. The FASB has issued additional ASUs on Topic 326 that do not change the core principle of the guidance in ASU 2016-13 but clarify certain aspects of it.

Effective January 1, 2020, the Company adopted this ASU using the modified-retrospective approach and recorded a cumulative effect adjustment to beginning retained earnings. The adoption of this ASU resulted in the recognition of an allowance for credit loss related to the Company’s reinsurance recoverables. However, since the Company enters into contracts with reinsurers that have A.M. Best ratings of “A” (Excellent) or better, the allowance was not material to the Company’s consolidated financial statements.

ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

On August 29, 2018, the FASB issued new guidance on a customer's accounting for implementation, set-up and other up-front costs incurred in a cloud computing arrangement hosted by the vendor. The new guidance requires an entity to determine the stage of a project that the implementation activity relates to and the nature of the associated costs in order to determine whether those costs should be expensed as incurred or capitalized. The new guidance also requires the entity to amortize the capitalized implementation costs as an expense over the term of the hosting arrangement. Effective January 1, 2020, the Company adopted ASU 2018-15 using a modified-retrospective approach. The adoption of ASU 2018-15 did not have a material impact on the Company's consolidated financial statements.

Prospective accounting pronouncements

ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other existing guidance to simplify several other income tax accounting matters. The updated guidance is effective for annual reporting periods beginning after December 15, 2020. Early adoption is permitted. The adoption of the guidance will not have a material effect on the Company’s consolidated financial statements.

There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company's consolidated financial statements.

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Investments

12 Months Ended

Dec. 31, 2020

Investments [Abstract]

Investments

Investments

Available-for-sale investments

The following tables summarize the Company’s available-for-sale investments at December 31, 2020 and 2019:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	14,792	$	(67)	$	230,906
Corporate and other securities	294,854		21,840		(86)		316,608
Asset-backed securities	236,813		4,230		(382)		240,661
Commercial mortgage-backed securities	66,110		4,886		(27)		70,969
Residential mortgage-backed securities	217,859		4,938		(141)		222,656
Total fixed-maturity investments	$	1,031,817	$	50,686	$	(703)	$	1,081,800

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	110	$	2	$	—	$	112
Obligations of states, municipalities and political subdivisions	166,312		7,542		(961)		172,893
Corporate and other securities	180,287		4,736		(255)		184,768
Asset-backed securities	141,123		1,272		(471)		141,924
Commercial mortgage-backed securities	54,627		1,658		(239)		56,046
Residential mortgage-backed securities	172,358		1,819		(388)		173,789
Total fixed-maturity investments	$	714,817	$	17,029	$	(2,314)	$	729,532

Available-for-sale investments in a loss position

The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. The Company considers a number of factors in completing its review of credit losses, including the extent to which a security's fair value has been below cost and the financial condition of an issuer. In addition to specific issuer information, the Company also evaluates the current market and interest rate environment. Generally, a change in a security’s value caused by a change in the market or interest rate environment does not constitute a credit loss.

For fixed-maturity securities, the Company also considers whether it intends to sell the security or if it is more likely than not that it will be required to sell the security before recovery and the ability to recover all amounts outstanding when contractually due. When assessing whether it intends to sell a fixed-maturity security or if it is likely to be required to sell a fixed-maturity security before recovery of its amortized cost, the Company evaluates facts and circumstances including, but not limited to, decisions to reposition the investment portfolio, potential sales of investments to meet cash flow needs and potential sales of investments to capitalize on favorable pricing.

For fixed-maturity securities where a decline in fair value is below the amortized cost basis and the Company intends to sell the security, or it is more likely than not that the Company will be required to sell the security before recovery of its

amortized cost, an impairment is recognized in net income based on the fair value of the security at the time of assessment. For fixed-maturity securities that the Company does not intend to sell or for which it is more likely than not that the Company would not be required to sell before recovery of its amortized cost, the Company compares the estimated present value of the cash flows expected to be collected to the amortized cost of the security. The extent to which the estimated present value of the cash flows expected to be collected is less than the amortized cost of the security represents the credit-related portion of the impairment, which is recognized in net income through an allowance for credit losses. Any remaining decline in fair value represents the noncredit portion of the impairment, which is recognized in other comprehensive income. Beginning on January 1, 2020, credit losses are recognized through an allowance account. See Note 1 - Recently adopted accounting pronouncements - ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) for additional information.

The Company reports investment income due and accrued separately from fixed-maturity securities, available for sale, and has elected not to measure an allowance for credit losses for investment income due and accrued. Investment income due and accrued is written off through net realized gains (losses) on investments at the time the issuer of the bond defaults or is expected to default on payments.

The following tables summarize gross unrealized losses and estimated fair value for available-for-sale investments by length of time that the securities have continuously been in an unrealized loss position:

	December 31, 2020
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	6,412	$	(67)	$	—	$	—	$	6,412	$	(67)
Corporate and other securities	3,829		(86)		—		—		3,829		(86)
Asset-backed securities	57,750		(149)		23,825		(233)		81,575		(382)
Commercial mortgage-backed securities	4,971		(27)		—		—		4,971		(27)
Residential mortgage-backed securities	46,869		(129)		266		(12)		47,135		(141)
Total fixed-maturity investments	$	119,831	$	(458)	$	24,091	$	(245)	$	143,922	$	(703)

At December 31, 2020, the Company held 60 fixed-maturity securities with a total estimated fair value of $143.9 million and gross unrealized losses of $0.7 million. Of those securities, 12 were in a continuous unrealized loss position for greater than one year. As discussed above, the Company regularly reviews all fixed-maturity securities within its investment portfolio to determine whether a credit loss has occurred. Based on the Company's review as of December 31, 2020, unrealized losses were caused by interest rate changes or other market factors and were not credit-specific issues. At December 31, 2020, 81.6% of the Company’s fixed-maturity securities were rated "A-" or better and all of Company's fixed-maturity securities made expected coupon payments under the contractual terms of the securities. Based on its review, the Company concluded that there were no credit losses from fixed-maturity securities with unrealized losses for the year ended December 31, 2020.

	December 31, 2019
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	28,997	$	(961)	$	254	$	—	$	29,251	$	(961)
Corporate and other securities	22,409		(251)		1,509		(4)		23,918		(255)
Asset-backed securities	21,371		(79)		44,115		(392)		65,486		(471)
Commercial mortgage-backed securities	16,352		(224)		2,508		(15)		18,860		(239)
Residential mortgage-backed securities	36,986		(148)		24,815		(240)		61,801		(388)
Total fixed-maturity investments	$	126,115	$	(1,663)	$	73,201	$	(651)	$	199,316	$	(2,314)

Contractual maturities of available-for-sale fixed-maturity securities

The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at December 31, 2020 are summarized, by contractual maturity, as follows:

	Amortized		Estimated
	Cost		Fair Value
	(in thousands)
Due in one year or less	$	15,545	$	15,782
Due after one year through five years	107,150		115,390
Due after five years through ten years	156,958		169,711
Due after ten years	231,382		246,631
Asset-backed securities	236,813		240,661
Commercial mortgage-backed securities	66,110		70,969
Residential mortgage-backed securities	217,859		222,656
Total fixed maturities	$	1,031,817	$	1,081,800

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties, and the lenders may have the right to put the securities back to the borrower.

Net investment income

The following table presents the components of net investment income:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Interest:
Taxable bonds	$	20,493	$	14,853	$	9,474
Municipal bonds (tax exempt)	3,618		3,692		4,298
Cash equivalents and short-term investments	262		842		1,017
Dividends on equity securities	3,512		2,136		2,014
Gross investment income	27,885		21,523		16,803
Investment expenses	(1,775)		(1,390)		(1,115)
Net investment income	$	26,110	$	20,133	$	15,688

Realized investment gains and losses

The following table presents realized investment gains and losses:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Fixed-maturity securities:
Realized gains	$	4,022	$	567	$	263
Realized losses	(383)		(79)		(17)
Net realized gains from fixed-maturity securities	3,639		488		246
Equity securities:
Realized gains	—		556		57
Realized losses	(119)		(688)		(22)
Net realized (losses) gains from equity securities	(119)		(132)		35
Short-term securities - realized gains	13		3		—
Net realized investment gains	$	3,533	$	359	$	281

Change in net unrealized gains (losses) on investments

The change in net unrealized gains for fixed-maturity securities was $35.3 million and $18.7 million for the years ended December 31, 2020 and 2019, respectively. The change in net unrealized losses for fixed-maturity securities was $6.9 million for the year ended December 31, 2018.

Insurance – statutory deposits

The Company had invested assets with a carrying value of $6.9 million on deposit with state regulatory authorities at both December 31, 2020 and 2019.

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Fair value measurements

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair value measurements

Fair value measurementsFair value is estimated for each class of financial instrument for which it was practical to estimate fair value. Fair value is defined as the price in the principal market that would be received for an asset or paid to transfer a liability to facilitate an orderly transaction between market participants on the measurement date. Market participants are assumed to be

independent, knowledgeable, able and willing to transact an exchange and not acting under duress. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value.

The three levels of the fair value hierarchy are defined as follows:

Level 1 - Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets.

Level 2 - Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs.

Level 3 - Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement.

Fair values of the Company's investment portfolio are estimated using unadjusted prices obtained by its investment accounting vendor from nationally recognized third-party pricing services, where available. Values for U.S. Treasury and exchange traded funds are generally based on Level 1 inputs which use quoted prices in active markets for identical assets. For other fixed-maturity securities and preferred stock, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these investments are included in the amounts disclosed as Level 2. For those investments where significant inputs are unobservable, the Company's investment accounting vendor obtains valuations from pricing vendors or brokers using the market approach and income approach valuation techniques and are disclosed as Level 3.

Management performs several procedures to ascertain the reasonableness of investment values included in the consolidated financial statements at December 31, 2020 and 2019, including 1) obtaining and reviewing internal control reports from the Company's investment accounting vendor that assess fair values from third party pricing services, 2) discussing with the Company's investment accounting vendor its process for reviewing and validating pricing obtained from third party pricing services and 3) reviewing the security pricing received from the Company's investment accounting vendor and monitoring changes in unrealized gains and losses at the individual security level. The Company has evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs.

The following tables present the balances of assets measured at fair value on a recurring basis as of December 31, 2020 and 2019, by level within the fair value hierarchy.

	December 31, 2020
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	—	$	230,906	$	—	$	230,906
Corporate and other securities	—		316,608		—		316,608
Asset-backed securities	—		240,661		—		240,661
Commercial mortgage-backed securities	—		70,969		—		70,969
Residential mortgage-backed securities	—		222,656		—		222,656
Total fixed maturities	—		1,081,800		—		1,081,800
Equity securities:
Exchange traded funds	98,050		—		—		98,050
Nonredeemable preferred stock	—		31,612		—		31,612
Total equity securities	98,050		31,612		—		129,662
Total	$	98,050	$	1,113,412	$	—	$	1,211,462

	December 31, 2019
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	112	$	—	$	—	$	112
Obligations of states, municipalities and political subdivisions	—		172,893		—		172,893
Corporate and other securities	—		184,768		—		184,768
Asset-backed securities	—		141,924		—		141,924
Commercial mortgage-backed securities	—		56,046		—		56,046
Residential mortgage-backed securities	—		173,789		—		173,789
Total fixed maturities	112		729,420		—		729,532
Equity securities:
Exchange traded funds	54,463		—		—		54,463
Nonredeemable preferred stock	—		23,831		—		23,831
Total equity securities	54,463		23,831		—		78,294
Total	$	54,575	$	753,251	$	—	$	807,826

There were no assets or liabilities measured at fair value on a nonrecurring basis as of December 31, 2020 or 2019.

The carrying value of cash equivalents approximates its fair value at December 31, 2020 and 2019, due to the short-term maturities of these assets. In addition, the estimated fair value of the Credit Facility approximated its carrying value as of December 31, 2020 and 2019. See Note 11 for further information regarding the Credit Facility.

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Deferred policy acquisition costs

12 Months Ended

Dec. 31, 2020

Deferred Policy Acquisition Costs Disclosures [Abstract]

Deferred policy acquisition costs

Deferred policy acquisition costs

The following table presents the amounts of policy acquisition costs deferred and amortized for the years ended:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Balance, beginning of year	$	23,564	$	14,801	$	11,775
Policy acquisition costs deferred:
Direct commissions	80,682		56,841		40,546
Ceding commissions	(18,879)		(12,373)		(11,239)
Other underwriting and policy acquisition costs	4,478		3,727		3,141
Policy acquisition costs deferred	66,281		48,195		32,448
Amortization of net policy acquisition costs	(57,933)		(39,432)		(29,422)
Balance, end of year	$	31,912	$	23,564	$	14,801

Amortization of net policy acquisition costs is included in the line item "Underwriting, acquisition and insurance expenses" in the accompanying consolidated statements of income and comprehensive income.

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Underwriting, acquisition and insurance expenses

12 Months Ended

Dec. 31, 2020

Underwriting, Acquisition and Insurance Expenses [Abstract]

Underwriting, acquisition and insurance expenses

Underwriting, acquisition and insurance expenses

Underwriting, acquisition and insurance expenses consist of the following:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Underwriting, acquisition and insurance expenses incurred:
Direct commissions	$	69,922	$	48,382	$	36,885
Ceding commissions	(16,145)		(12,347)		(10,448)
Other operating expenses	40,519		34,182		26,988
Total	$	94,296	$	70,217	$	53,425

Other operating expenses within underwriting, acquisition and insurance expenses included salaries, employee benefits and bonus expense of $35.9 million, $27.8 million and $19.7 million, for the years ended December 31, 2020, 2019 and 2018, respectively.

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Income taxes

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Income taxes

Income taxes

The Company’s subsidiaries file a consolidated U.S. federal income tax return. Under a tax sharing agreement, KCGI collects from or refunds to its subsidiaries the amount of taxes determined as if KCGI and the subsidiaries filed separate returns. The Company is no longer subject to income tax examination by tax authorities for the years ended before January 1, 2017.

The Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was enacted on March 27, 2020. The purpose of the CARES Act is to provide emergency assistance and health care response for individuals, families, and businesses affected by the 2020 coronavirus pandemic. The CARES Act builds on and clarifies a number of changes in corporate tax law implemented by the Tax Cuts and Jobs Act. The CARES Act will not have a significant impact on the Company's consolidated financial statements.

Income tax expense includes the following components for the years ending December 31, 2020, 2019 and 2018:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Current federal income tax expense	$	11,378	$	12,860	$	9,923
Deferred federal income tax (benefit) expense	616		(125)		(3,230)
Income tax expense	$	11,994	$	12,735	$	6,693

The Company paid $13.0 million, $11.6 million and $9.9 million in federal income taxes during the years ended December 31, 2020, 2019 and 2018, respectively. Current income taxes recoverable was $1.2 million at December 31, 2020, and included in "other assets" in the accompanying consolidated balance sheets. Current income taxes payable was $0.4 million at December 31, 2019, and included in "other liabilities" in the accompanying consolidated balance sheets.

The prevailing federal income tax rate was 21% in 2020, 2019 and 2018. The Company’s effective income tax rate on income before income taxes differs from the prevailing federal income tax rate and is summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Income tax expense at federal income tax rate	$	21,087	$	15,971	$	8,501
Stock options exercised	(7,634)		(2,411)		(918)
Tax-exempt investment income	(565)		(577)		(672)
Restricted stock award vesting	(658)		(153)		—
Other	(236)		(95)		(218)
Total	$	11,994	$	12,735	$	6,693

The significant components of the net deferred tax (liability) asset are summarized as follows:

	December 31,
	2020		2019
	(in thousands)
Deferred tax assets:
Unpaid losses and loss adjustment expenses	$	11,736	$	8,199
Unearned premiums	9,942		7,193
Organizational costs	128		162
Stock compensation	865		765
State operating loss carryforwards	3,833		1,497
Allowance for doubtful accounts	649		570
Other	126		256
Deferred tax assets before allowance	27,279		18,642
Less: valuation allowance	(3,491)		(1,592)
Total deferred tax assets	23,788		17,050
Deferred tax liabilities:
Unrealized gains on fixed-maturity securities	10,497		3,090
Unrealized gains on equity securities	6,552		2,995
Deferred policy acquisition costs, net of ceding commissions	6,701		4,949
Property and equipment	2,433		10
Intangible assets	743		743
Transition adjustment for loss reserve discount	1,281		1,537
Other	229		352
Total deferred tax liabilities	28,436		13,676
Net deferred tax (liability) asset	$	(4,648)	$	3,374

At December 31, 2020 and 2019, the Company had state net operating losses ("NOLs") of $80.9 million and $31.6 million, respectively. The state NOLs are available to offset future taxable income or reduce taxes payable and begin expiring in 2029. 

Management evaluates the need for a valuation allowance related to its deferred tax assets. At December 31, 2020 and 2019, the Company recorded a tax valuation allowance equal to the state NOLs and the deferred tax assets, net of existing deferred tax liabilities that were expected to reverse in future periods, related to certain state jurisdictions. No other valuation allowances were established against the Company’s deferred tax assets at December 31, 2020 and 2019, as the Company believes that it is more likely than not that the remaining deferred tax assets will be realized given the carry back availability, reversal of existing temporary differences and future taxable income.

The Company did not have any material uncertain tax positions in 2020 or 2019. Management is not aware of any events that would give rise to any uncertain tax positions.

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Reserves for unpaid losses and loss adjustment expenses

12 Months Ended

Dec. 31, 2020

Liability for Claims and Claims Adjustment Expense [Abstract]

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses

The reserves for unpaid losses and loss adjustment expenses represent the Company's estimated ultimate cost of all unreported and reported but unpaid insured claims and the cost to adjust these losses that have occurred as of or before the balance sheet date. Reserves are estimated using individual case-basis valuations of reported claims and statistical analyses. Case reserves are established for individual claims that have been reported to the Company, typically by the Company's insureds or their brokers. Based on the information provided, case reserves are established by estimating the ultimate losses from the claim, including defense costs associated with the ultimate settlement of the claim. Incurred-but-not-reported ("IBNR") reserves are determined using actuarial methods to estimate losses that have occurred but have not yet been reported to the Company. The incurred Bornhuetter-Ferguson actuarial method ("BF method") is used to arrive at the Company's loss reserve estimates for each line of business. This method estimates the reserves based on the initial expected loss ratio and expected reporting patterns for losses. Because the Company has a limited number of years of loss experience compared to the period over which losses are expected to be reported, the Company uses industry and peer-group data, in addition to its own data, as a basis for selecting its expected reporting patterns.

As part of the reserving process, the Company reviews historical data and considers the effect of various factors on claims development patterns including polices written on a "claims made" versus "occurrence" basis. Policies written on a claims made basis provide coverage to the insured only for losses incurred during the coverage period, and only if the claim was reported during a specified reporting period. Policies written on an occurrence basis provide coverage to the insured for liabilities arising from events occurring during the term of the policy, regardless of when a claim is actually made. Accordingly, claims related to policies written on an occurrence basis may arise many years after a policy has lapsed. Property losses, while written on an occurrence basis, are generally reported within a short time from the date of loss, and in most instances, property claims are settled and paid within a relatively short period of time.

The following table presents a reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses:

	December 31,
	2020		2019		2018
	(in thousands)
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	$	460,058	$	369,152	$	315,717
Less: reinsurance recoverable on unpaid losses	69,792		55,389		48,224
Adoption of new accounting standard for credit losses	(282)		—		—
Net reserves for unpaid losses and loss adjustment expenses, beginning of year	390,548		313,763		267,493
Incurred losses and loss adjustment expenses:
Current year	277,140		178,986		135,078
Prior year	(13,338)		(9,423)		(7,037)
Total net losses and loss adjustment expenses incurred	263,802		169,563		128,041
Payments:
Current year	27,664		19,054		14,118
Prior year	74,403		74,006		67,653
Total payments	102,067		93,060		81,771
Net reserves for unpaid losses and loss adjustment expenses, end of year	552,283		390,266		313,763
Reinsurance recoverable on unpaid losses, net of allowance	83,730		69,792		55,389
Gross reserves for unpaid losses and loss adjustment expenses, end of year	$	636,013	$	460,058	$	369,152

During the year ended December 31, 2020, our net incurred losses for accident years 2019 and prior developed favorably by $13.3 million. This favorable development included $10.5 million for the 2019 accident year and $1.8 million for accident year 2018. This favorable development was primarily due to reported losses emerging at a lower level than expected, largely across the

other liability and excess lines of business. Current year incurred losses and loss adjustment expenses for the year ended December 31, 2020 included $23.2 million of catastrophe losses primarily related to Hurricane Laura, Hurricane Sally and the California wildfires.

During the year ended December 31, 2019, our net incurred losses for accident years 2018 and prior developed favorably by $9.4 million. This favorable development included $13.0 million for the 2018 accident year and $1.6 million for the 2017 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, on the other liability and products liability lines of business. The favorable development was offset by adverse development of $5.2 million for the 2011 through 2015 accident years. The unfavorable development was primarily attributable to the other liability occurrence line of business. This adverse development largely resulted from management’s decision to lengthen the actuarial loss development factors to provide for emergence of reported losses over a longer period of time based on trends observed in loss experience, which added a modest amount of conservatism to the Company’s IBNR reserves.

During the year ended December 31, 2018, our net incurred losses for accident years 2017 and prior developed favorably by $7.0 million. This favorable development included $6.8 million for the 2017 accident year, $3.8 million for the 2016 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, across most lines of business. The favorable development was offset in part by adverse development of $3.6 million for the 2011 through 2015 accident years. The unfavorable development was primarily attributable to the other liability occurrence line of business.

Incurred and Paid Claims Development

The following is information about incurred and paid claims development as of December 31, 2020, net of reinsurance, as well as cumulative claim frequency and the total of IBNR liabilities plus expected development on reported claims included within the net incurred claims amounts. The development and claims duration tables below exclude commuted multi-line quota-share reinsurance treaty ("MLQS") contracts, which would distort development patterns related to those transactions. Cumulative number of reported claims is reported on a per claim basis.

The information about incurred and paid claims development for the years ended December 31, 2011 to December 31, 2019, is presented as unaudited supplementary information.

Property

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,										As of December 31, 2020
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
	($ in thousands)
2016	$	4,177	$	3,392	$	3,301	$	3,278	$	3,270	$	—	286
2017			12,473		11,705		11,676		11,631		19		1,041
2018					11,559		12,004		12,698		88		649
2019							14,914		13,909		430		636
2020									40,612		7,139		2,189
							Total		$	82,120

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
	($ in thousands)
2016	$	1,867	$	3,257	$	3,265	$	3,265	$	3,270
2017			9,938		11,233		11,602		11,608
2018					9,132		11,646		12,599
2019							9,852		12,581
2020									19,897
							Total		59,955
			All outstanding liabilities before 2016, net of reinsurance						—
			Liabilities for claims and claim adjustment expenses, net of reinsurance						$	22,165

Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5
Property	66.9	%	23.3	%	3.6	%	—	%	0.2	%

Casualty - Claims Made

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	4,246	$	3,844	$	3,646	$	3,609	$	3,560	$	3,374	$	3,261	$	3,225	$	3,206	$	3,177	$	73	76
2012			7,913		5,749		4,205		3,102		2,845		2,477		2,314		2,207		2,136		190		138
2013					15,238		11,639		9,113		7,917		7,002		6,463		6,128		6,087		465		228
2014							18,847		14,289		11,748		11,217		10,948		10,988		10,620		824		273
2015									18,883		16,777		14,896		13,583		13,942		13,548		1,378		258
2016											19,170		14,693		14,675		14,322		13,583		2,116		310
2017													18,116		17,097		16,120		15,794		3,703		369
2018															22,429		20,234		18,612		7,275		458
2019																	34,693		29,056		17,500		538
2020																			55,630		48,966		738
																	Total		$	168,243

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	139	$	1,037	$	1,392	$	2,116	$	3,044	$	3,042	$	3,042	$	3,065	$	3,104	$	3,104
2012			153		475		877		1,024		1,090		1,882		1,946		1,946		1,946
2013					499		1,915		4,436		5,070		5,320		5,439		5,482		5,612
2014							435		1,865		5,039		6,385		8,290		9,415		9,491
2015									217		4,496		7,563		9,238		11,372		11,522
2016											1,158		3,015		6,907		9,839		11,381
2017													340		4,897		8,252		10,484
2018															507		5,030		8,931
2019																	2,487		6,005
2020																			1,002
																	Total		69,478
	All outstanding liabilities before 2011, net of reinsurance																		9
	Liabilities for claims and claim adjustment expenses, net of reinsurance																		$	98,774

Casualty - Occurrence

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	5,839	$	5,940	$	5,757	$	7,340	$	7,613	$	8,142	$	8,375	$	9,023	$	9,379	$	9,318	$	360	227
2012			16,977		17,436		18,803		20,401		20,579		22,001		22,401		23,223		23,197		1,288		586
2013					30,616		28,771		28,037		29,039		31,731		33,248		33,973		33,128		2,978		856
2014							47,805		40,668		38,049		36,678		39,313		41,859		42,434		5,843		1,196
2015									59,717		51,739		49,122		52,100		54,697		54,090		9,323		1,496
2016											61,440		55,680		53,549		55,534		57,401		13,928		1,434
2017													71,126		67,151		68,985		70,641		24,096		1,632
2018															86,157		78,331		78,386		44,307		1,606
2019																	112,266		109,994		81,322		1,644
2020																			154,619		146,945		1,076
																	Total		$	633,208

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	207	$	1,596	$	2,519	$	3,788	$	4,575	$	6,363	$	6,868	$	8,510	$	8,693	$	8,745
2012			757		4,441		7,850		11,238		14,382		16,474		19,383		20,707		21,408
2013					1,099		4,469		7,957		14,890		21,348		26,715		28,248		29,610
2014							698		3,081		8,489		17,576		23,771		31,026		34,338
2015									941		3,161		12,685		28,385		37,690		41,724
2016											1,099		6,015		17,225		28,924		34,437
2017													1,581		9,352		22,407		37,736
2018															2,638		10,995		22,860
2019																	3,944		16,687
2020																			2,400
																	Total		249,945
					All outstanding liabilities before 2011, net of reinsurance														46
			Liabilities for claims and claim adjustment expenses, net of reinsurance																$	383,309

Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5		6		7		8		9		10
Casualty - claims made	4.9	%	21.2	%	24.3	%	14.4	%	13.6	%	10.1	%	1.1	%	1.0	%	0.6	%	—	%
Casualty - occurrence	2.5	%	10.3	%	14.8	%	20.2	%	13.8	%	13.8	%	7.6	%	9.1	%	2.5	%	0.6	%

Reconciliation of Incurred and Paid Claims Development to the Liability for Unpaid Claims and Claim Adjustment Expenses

The reconciliation of the net incurred and paid claims development tables to the liability for unpaid claims and claim adjustment expenses in the consolidated statement of financial position is as follows:

(in thousands)	December 31, 2020
Net outstanding liabilities
Property	$	22,165
Casualty - claims made	98,774
Casualty - occurrence	383,309
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	504,248
Reinsurance recoverable on unpaid claims
Property	10,800
Casualty - claims made	61,100
Casualty - occurrence	11,830
Total reinsurance recoverable on unpaid claims	83,730
Unallocated claims adjustment expenses	48,035
Gross liability for unpaid claims and claim adjustment expense	$	636,013

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Reinsurance

12 Months Ended

Dec. 31, 2020

Reinsurance Disclosures [Abstract]

Reinsurance

Reinsurance

The Company purchases reinsurance from other insurance companies ("reinsurers") in order to limit its exposure to large losses and enable it to underwrite policies with sufficient limits to meet policyholder needs. In a reinsurance transaction, an insurance company transfers, or cedes, part or all of its exposure to the reinsurer that receives a portion of the premium. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policy coverage, and therefore the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement.

The following table summarizes the effect of reinsurance on premiums written and earned:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Written:
Direct	$	552,814	$	389,569	$	275,538
Assumed	—		125		—
Ceded	(74,595)		(47,633)		(39,924)
Net written	$	478,219	$	342,061	$	235,614
Earned:
Direct	$	479,181	$	330,464	$	250,397
Assumed	21		104		—
Ceded	(66,448)		(47,587)		(37,709)
Net earned	$	412,754	$	282,981	$	212,688

Incurred losses and loss adjustment expenses were net of reinsurance recoverables (ceded incurred losses and loss adjustment expenses) of $42.0 million, $27.2 million and $25.5 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Reinsurance balances

The following table presents reinsurance recoverables on paid and unpaid losses as of December 31, 2020 and 2019:

	December 31, 2020		December 31, 2019
	(in thousands)
Reinsurance recoverables on paid losses	$	9,485	$	2,782
Reinsurance recoverables on unpaid losses	83,730		69,792
Reinsurance recoverables	$	93,215	$	72,574

Credit risk exists with reinsurance ceded to the extent that any reinsurer is unable to meet the obligations assumed under the reinsurance agreements. Allowances are established for amounts deemed uncollectible. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk arising from its exposure to individual reinsurers. All reinsurance receivables are from companies with A.M. Best ratings of "A" (Excellent) or better. To further reduce credit exposure to reinsurance recoverable balances, the Company has received letters of credit from certain reinsurers that are not authorized as reinsurers under U.S. state insurance regulations. After adoption of ASU 2016-13, the Company recorded an allowance for doubtful accounts of $0.3 million related to its reinsurance balances at December 31, 2020; however, the deterioration in the credit quality of existing reinsurers or disputes over reinsurance agreements could result in future charges. See Note 1 - Recently adopted accounting pronouncements - ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) for additional information. The Company did not record an allowance for doubtful accounts related to its reinsurance balances at December 31, 2019 and believed this was appropriate after consideration of all currently available information.

At December 31, 2020, reinsurance recoverables on paid and unpaid losses from the Company’s five largest reinsurers were $26.3 million, $19.7 million, $11.9 million, $8.6 million and $6.5 million, representing 78.4% of the total balance.

At December 31, 2020, prepaid reinsurance premiums ceded to five reinsurers were $6.1 million, $4.0 million, $2.7 million, $2.4 million and $2.3 million, representing 71.8% of the total balance.

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Stockholders' Equity

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Attributable to Parent [Abstract]

Stockholders' equity

Stockholders’ equity

Capital Stock

The Company’s authorized capital stock consists of 400,000,000 shares of common stock, par value $0.01 per share, and 100,000,000 shares of preferred stock, par value $0.01 per share. There were no shares of preferred stock issued or outstanding at December 31, 2020 or 2019.

Public Offerings

On August 7, 2020, the Company completed an underwritten public offering and sold and issued 310,500 shares of its common stock at a price of $190.00 per share. After deducting underwriting discounts and commissions and offering expenses, the Company received net proceeds of $56.7 million. The proceeds from the public offering were used for general corporate purposes, including to fund organic growth.

On August 12, 2019, the Company completed an underwritten public offering and sold and issued 741,750 shares of its common stock at a price of $93.00 per share. After deducting underwriter discounts and commissions and offering expenses, the Company received net proceeds from the offering of approximately $65.9 million.

Equity-based Compensation

On July 27, 2016, the Kinsale Capital Group, Inc. 2016 Omnibus Incentive Plan (the "2016 Incentive Plan") became effective. The 2016 Incentive Plan, which is administered by the Compensation, Nominating and Corporate Governance Committee of the Company's Board of Directors, provides for grants of stock options, restricted stock, restricted stock units and other stock-based awards to officers, employees, directors, independent contractors and consultants. The number of shares of common stock available for issuance under the 2016 Incentive Plan may not exceed 2,073,832.

The Company recognized total equity-based compensation expense of $3.6 million, $2.7 million and $1.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Stock Options

On July 27, 2016, the Board of Directors approved, and the Company granted, 1,036,916 stock options with an exercise price equal to the initial public offering price of $16.00 per share. The options have a maximum contractual term of 10 years and vested in 4 equal annual installments following the date of the grant. The weighted average grant date fair value of options granted during 2016 was $2.71 per share.

The value of the options granted was estimated at the date of grant using the Black-Scholes pricing model using the following assumptions:

Risk-free rate of return	1.26	%
Dividend yield	1.25	%
Expected share price volatility(1)	18.50	%
Expected life in years(2)	6.3 years

(1)     Expected volatility was based on the Company’s competitors within the industry.

(2)     Expected life was calculated using the simplified method, which was an average of the contractual term of the option and its ordinary vesting period, as the Company did not have sufficient historical data for determining the expected term of our stock option awards.

A summary of option activity as of December 31, 2020, and changes during the year then ended is presented below:

	Number of Shares	Weighted-average exercise price		Weighted-average remaining years of contractual life	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2019	614,345	$	16.00
Granted	—	—
Forfeited	(234)	16.00
Exercised	(226,373)	16.00
Outstanding at December 31, 2020	387,738	$	16.00	5.6	$	71,394
Exercisable at December 31, 2020	387,738	$	16.00	5.6	$	71,394

The total intrinsic value of options exercised was $37.0 million during the year ended December 31, 2020 and $11.9 million during the year ended December 31, 2019.

Restricted Stock Awards

During 2020, the Board of Directors approved, and the Company granted, restricted stock awards under the 2016 Incentive Plan. The restricted stock awards were valued on the date of grant and will vest over a period of 1 to 4 years corresponding to the anniversary date of the grants. The fair value of restricted stock awards was determined based on the closing trading price of the Company’s common stock on the grant date or, if no common stock was traded on the grant date, the last preceding date for which there was a sale of common stock. Except for restrictions placed on the transferability of restricted stock, holders of unvested restricted stock have full stockholder’s rights, including voting rights and the right to receive cash dividends. Unvested restricted stock awards and accrued dividends, if any, are forfeited upon the termination of service to or employment with the Company.

A summary of restricted stock activity under the equity compensation plans for the year ended is as follows:

	December 31, 2020
	Number of Shares	Weighted Average Grant Date Fair Value per Share
Nonvested outstanding at the beginning of the period	122,723	$	67.01
Granted	42,694	$	147.45
Vested	(41,010)	$	63.86
Forfeited	(16,015)	$	83.79
Nonvested outstanding at the end of the period	108,392	$	97.40

Employees surrender restricted stock awards to pay for withholding tax obligations resulting from any vesting of those awards. During the year ended December 31, 2020, restricted stock awards withheld for taxes in connection with the vesting of those awards totaled 11,966.

The weighted average grant-date fair value of the Company's restricted stock awards granted during the years ended December 31, 2020, 2019, and 2018 was $147.45, $80.59 and $52.99, respectively. The fair value of restricted stock awards that vested during the year ended December 31, 2020 and 2019 was $5.8 million and $2.1 million, respectively. There were no restricted stock awards that vested during the year ended December 31, 2018. As of December 31, 2020, the Company had $8.3 million of total unrecognized stock-based compensation expense expected to be charged to earnings over a weighted-average period of 2.8 years.

Subsequent Events

The Board of Directors granted 3,200 restricted stock awards on January 1, 2021 under the 2016 Incentive Plan to the Company’s non-employee directors. The restricted stock awards had a fair value on the date of grant of $200.13 per share and will vest on a straight-line basis over a 1 year period.

On February 11, 2021, the Company’s Board of Directors declared a cash dividend of $0.11 per share of common stock. This dividend is payable on March 12, 2021 to all stockholders of record on February 26, 2021.

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Earnings per share

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

The following table represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements:

	Year ended December 31,
	2020		2019		2018
	(in thousands, except per share data)
Net income	$	88,419	$	63,316	$	33,787
Weighted average common shares outstanding - basic	22,319		21,528		21,090
Dilutive effect of shares issued under stock compensation arrangements:
Stock options	469		570		591
Restricted stock awards	64		38		4
Total dilutive effect of shares issued under stock compensation arrangements	533		608		595
Weighted average common shares outstanding - diluted	22,852		22,136		21,685
Earnings per common share:
Basic	$	3.96	$	2.94	$	1.60
Diluted	$	3.87	$	2.86	$	1.56

There were 35 thousand, 54 thousand and 86 thousand anti-dilutive stock awards for the years ended December 31, 2020, 2019 and 2018, respectively.

Basic earnings per share was computed by dividing the earnings attributable to the common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share was computed by dividing earnings attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period, including potentially dilutive shares of common stock for the period determined using the treasury stock method.

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Credit Agreement

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Credit Agreement

Credit agreement

On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters but may also be used for working capital and general corporate purposes.

Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of

0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. During the year ended December 31, 2020, the Company drew down $25.7 million on its Credit Facility. As of December 31, 2020, there was $42.6 million outstanding under the Credit Facility, net of debt issuance cost of $0.4 million, with a weighted average interest rate of 1.98%. For the year ended December 31, 2020, total interest expense under the Credit Facility was $1.0 million, of which $0.8 million was capitalized as part of the real estate project under construction. See Note 1 for further details. Interest paid was $0.8 million and $0.1 million for the years ended December 31, 2020 and 2019, respectively. There were no credit agreements outstanding at December 31, 2018.

The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2020, the Company was in compliance with all of its financial covenants under the Credit Facility.

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Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	ContingenciesContingencies arise in the normal conduct of the Company’s operations and are not expected to have a material effect on the Company’s financial condition or results of operations. However, adverse outcomes are possible and could negatively affect the Company’s financial condition and results of operations.

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Employee benefit plan	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Employee benefit plan	Employee benefit planThe Company has established a defined contribution employee retirement plan ("Plan") in accordance with Section 401(k) of the Internal Revenue Code. Expenses related to the Plan were $1.7 million, $1.3 million and $1.0 million in 2020, 2019 and 2018, respectively.

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Other comprehensive income (loss)

12 Months Ended

Dec. 31, 2020

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other comprehensive income (loss)

Other comprehensive income (loss)

The following table summarizes the components of other comprehensive income (loss):

	Year Ending December 31,
	2020		2019		2018
	(in thousands)
Unrealized gains (losses) on fixed-maturity securities arising during the period, before income taxes:	$	37,387	$	19,190	$	(6,664)
Income tax (expense) benefit	(7,851)		(4,029)		1,399
Unrealized gains (losses) arising during the period, net of income taxes	29,536		15,161		(5,265)
Less reclassification adjustment:
Net realized investment gains on available-for-sale investments	2,119		489		258
Income tax benefit	(445)		(102)		(54)
Reclassification adjustment included in net income	1,674		387		204
Other comprehensive income (loss)	$	27,862	$	14,774	$	(5,469)

The sale of an available-for-sale security results in amounts being reclassified from accumulated other comprehensive income to realized gains or losses in current period earnings. The related tax effect of the reclassification adjustment is recorded in income tax expense in current period earnings. See Note 2 for additional information.

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Underwriting information

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Underwriting information

Underwriting informationThe Company has one reportable segment, the Excess and Surplus Lines Insurance segment, which primarily offers commercial excess and surplus lines liability and property insurance products through its underwriting divisions. Gross written premiums by underwriting division are presented below:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Commercial:
Construction	$	87,206	$	71,035	$	50,879
Small business	83,289		63,181		44,368
Excess casualty	76,715		51,225		37,398
Commercial property	51,789		29,115		9,166
Product liability	38,306		26,333		20,049
Allied health	37,562		23,962		16,815
Life sciences	31,027		17,821		14,505
General casualty	29,205		23,279		17,625
Professional liability	27,051		20,029		16,717
Management liability	24,061		14,820		8,161
Energy	16,985		15,371		15,586
Environmental	8,568		5,179		2,205
Health care	7,666		5,963		5,725
Inland marine	6,910		3,467		2,046
Public entity	3,007		580		1,193
Commercial insurance	1,757		1,674		1,096
Total commercial	531,104		373,034		263,534
Personal:
Personal insurance	21,710		16,660		12,004
Total	$	552,814	$	389,694	$	275,538

Construction underwrites commercial general liability coverage on contractors focusing on new residential construction, residential remodeling and renovation and commercial construction.

Small business underwrites commercial general liability on smaller risks with an emphasis on artisan contractors and premises related exposures.

Excess casualty underwrites excess liability over risks that would fit within the general casualty, construction, products liability and small business divisions. Coverage is written over the Company's primary liability policies as well as those of other insurers. This division also writes excess liability over primary commercial auto liability policies written by other carriers.

Commercial property underwrites first-party coverage on manufacturing facilities, government and municipal buildings, professional buildings, offices and general commercial properties, vacant properties, as well as entertainment and retail facilities.

Products liability underwrites commercial general liability on manufacturers, distributors and importers of a wide array of consumer, commercial and industrial products.

Allied health underwrites commercial general liability, professional liability and excess liability on allied health and social service risks including assisted living facilities, home health care agencies and outpatient medical facilities.

Life sciences underwrites general liability, products liability and professional liability coverage for manufacturers, distributors and developers of dietary supplements, medical devices, pharmaceuticals, biologics, health and beauty products, durable medical equipment and clinical trials.

General casualty underwrites general liability and liquor liability on hospitality, habitational and retail risks, among others, with similar premises liability loss exposures.

Professional liability underwrites small-to-medium sized non-medical professional liability risks. The classes of risks include accountants, architects and engineers, financial planners, insurance agents, lawyers, realtors, and certain other professions.

Management liability underwrites directors and officers liability, employment practices liability and fiduciary liability coverage on a variety of commercial and government risks.

Energy underwrites commercial general liability, pollution liability, professional liability and excess liability on enterprises engaged in the business of energy production or distribution or mining including drillers, lease operators, contractors, product manufacturers and alternative energy.

Environmental underwrites commercial general liability, pollution liability and professional liability on a wide range of commercial risks where environmental exposures exist that are operational in nature or related to the premises.

Health care underwrites medical professional liability for physicians, surgeons, dentists, chiropractors and podiatrists. Policies cover both individuals and small practice groups.

Inland marine underwrites a variety of inland marine coverages including builders risk, contractors' equipment, transportation risks and mobile equipment.

Public entity underwrites law enforcement professional liability and school board liability.

Commercial insurance underwrites commercial general liability on small accounts, through the Company's wholly-owned broker, Aspera.

Personal insurance writes homeowners coverage on manufactured homes with a catastrophe exposure due to coastal location.

The Company does business with three unaffiliated insurance brokers that generated $72.1 million, $63.8 million and $56.5 million of gross written premiums for the year ended December 31, 2020, representing 13.0%, 11.5% and 10.2% of gross written premiums, respectively. No other broker generated 10.0% or more of the gross written premiums for the year ended December 31, 2020.

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Statutory financial information

12 Months Ended

Dec. 31, 2020

Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]

Statutory financial information

Statutory financial information

Kinsale Insurance maintains its accounts in conformity with accounting practices prescribed or permitted by state regulatory authorities that vary in certain respects from U.S. GAAP. In converting from statutory accounting principles to U.S. GAAP, typical adjustments include deferral of policy acquisition costs, the inclusion of statutory nonadmitted assets and the inclusion of net unrealized gains or losses relating to fixed maturities in stockholders’ equity. The Company does not use any permitted practices that are different from prescribed statutory accounting practices.

Statutory net income and statutory capital and surplus for Kinsale Insurance as of December 31, 2020, 2019, and 2018 and for the years then ended are summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Statutory net income	$	54,338	$	40,917	$	34,206
Statutory capital and surplus	$	476,066	$	348,811	$	233,500

Kinsale Insurance is subject to risk-based capital ("RBC") requirements. RBC is a method developed by the National Association of Insurance Commissioners ("NAIC") to determine the minimum amount of statutory capital appropriate for an insurance company to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC is calculated using various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. The adequacy of a company’s actual capital is evaluated by a comparison to the RBC results, as determined by the formula. Companies that do not maintain statutory capital and surplus at a level in excess of the company action level RBC are required to take specified actions. At December 31, 2020 and 2019, actual statutory capital and surplus for Kinsale Insurance substantially exceeded the regulatory requirements. 

Dividend payments to Kinsale from Kinsale Insurance are restricted by state insurance laws as to the amount that may be paid without prior approval of the regulatory authorities of Arkansas. The maximum dividend distribution is limited by Arkansas law to the greater of 10% of policyholder surplus as of December 31 of the previous year or statutory net income, not including realized capital gains, for the previous calendar year. Dividend payments are further limited to that part of available policyholder surplus which is derived from net profits on its business. The maximum dividend distribution that can be paid by Kinsale Insurance during 2021 without prior approval is $51.8 million.

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Unaudited Selected Quarterly Financial Data

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

Unaudited selected quarterly financial data

The following is a summary of the unaudited quarterly results of operations:

	2020 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	124,036	$	134,091	$	144,777	$	149,910
Total revenues	80,346		117,707		122,501		139,332
Net income	5,086		30,262		14,890		38,181
Comprehensive (loss) income	(4,137)		57,270		21,444		41,704
Earnings per share - basic	$	0.23	$	1.37	$	0.66	$	1.69
Earnings per share - diluted	$	0.22	$	1.33	$	0.65	$	1.65

	2019 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	84,626	$	94,947	$	97,984	$	112,137
Total revenues	72,185		72,572		78,327		92,804
Net income	18,720		13,767		12,976		17,853
Comprehensive income	25,500		20,322		16,218		16,050
Earnings per share - basic	$	0.88	$	0.65	$	0.60	$	0.81
Earnings per share - diluted	$	0.86	$	0.63	$	0.58	$	0.79

Due to differences in weighted average common shares outstanding, quarterly earnings per share may not add up to the totals reported for the full year.

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SEC Schedule, Article 12-15, Summary of Investments - Other than Investments in Related Parties

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]

SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties

Schedule I

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Summary of Investments—Other than Investments in Related Parties

Type of Investment	Cost or Amortized Cost		Fair Value		Amount at which shown on Balance Sheet
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	230,906	$	230,906
Corporate and other securities	294,854		316,608		316,608
Asset-backed securities	236,813		240,661		240,661
Commercial mortgage-backed securities	66,110		70,969		70,969
Residential mortgage-backed securities	217,859		222,656		222,656
Total fixed maturities	1,031,817		1,081,800		1,081,800
Equity securities:
Exchange traded funds	68,032		98,050		98,050
Nonredeemable preferred stock	30,726		31,612		31,612
Total equity securities	98,758		129,662		129,662
Total investments	$	1,130,575	$	1,211,462	$	1,211,462

See accompanying Report of Independent Registered Public Accounting Firm.

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Schedule II - Condensed Financial Information of Registrant

12 Months Ended

Dec. 31, 2020

Condensed Financial Information Disclosure [Abstract]

Condensed Financial Information of Parent Company Only Disclosure

Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Balance Sheets (Parent Company Only)

	December 31,
	2020		2019
	(in thousands)
Assets
Cash and cash equivalents	$	8,395	$	14,726
Due from subsidiaries	7,792		16,836
Investment in subsidiaries	600,931		391,071
Deferred income tax asset, net	587		519
Income taxes recoverable	1,177		—
Other assets	290		208
Total assets	$	619,172	$	423,360
Liabilities and Stockholders' Equity
Liabilities:
Accounts payable and accrued expenses	$	302	$	260
Income taxes payable	—		434
Credit facility	42,570		16,744
Other liabilities	62		42
Total liabilities	42,934		17,480
Stockholders’ equity:
Common stock	228		222
Additional paid-in capital	291,315		229,229
Retained earnings	243,315		162,911
Accumulated other comprehensive income	41,380		13,518
Stockholders’ equity	576,238		405,880
Total liabilities and stockholders’ equity	$	619,172	$	423,360

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Statements of Income and Comprehensive Income (Parent Company Only)

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Revenues:
Management fees from subsidiaries	$	5,709	$	4,502	$	3,215
Total revenues	5,709		4,502		3,215
Expenses:
Other operating expenses	6,624		5,215		4,055
Other expenses	1,332		—		—
Total expenses	7,956		5,215		4,055
Loss before income taxes	(2,247)		(713)		(840)
Income tax benefit	(8,779)		(2,714)		(1,158)
Income before equity in net income of subsidiaries	6,532		2,001		318
Equity in net income of subsidiaries	81,887		61,315		33,469
Net income	88,419		63,316		33,787
Other comprehensive income (loss):
Equity in other comprehensive earnings (losses) of subsidiaries	27,862		14,774		(5,469)
Total comprehensive income	$	116,281	$	78,090	$	28,318

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

Schedule II

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Condensed Financial Information of Registrant

Statements of Cash Flows (Parent Company Only)

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Operating activities
Net income	$	88,419	$	63,316	$	33,787
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred tax benefit	(68)		(150)		(170)
Stock compensation expense	3,575		2,742		1,597
Equity in undistributed earnings of subsidiaries	(81,887)		(61,315)		(33,469)
Changes in operating assets and liabilities	7,520		(14,247)		(633)
Dividends received from subsidiary	—		5,000		11,500
Net cash provided by (used in) operating activities	17,559		(4,654)		12,612
Investing activities
Contributions to subsidiary	(100,034)		(68,391)		—
Net cash used in investing activities	(100,034)		(68,391)		—
Financing activities
Common stock issued, net of transaction costs	56,698		65,879		—
Common stock issued, stock options exercised	3,622		2,750		1,808
Payroll taxes withheld and remitted on share-based payments	(1,803)		(617)		—
Dividends paid	(8,073)		(6,929)		(5,906)
Proceeds from credit facility	25,700		17,300		—
Debt issuance costs	—		(628)		—
Net cash provided by (used in) financing activities	76,144		77,755		(4,098)
Net change in cash and cash equivalents	(6,331)		4,710		8,514
Cash and cash equivalents at beginning of year	14,726		10,016		1,502
Cash and cash equivalents at end of year	$	8,395	$	14,726	$	10,016

See accompanying notes to condensed financial information.

See accompanying Report of Independent Registered Public Accounting Firm.

KINSALE CAPITAL GROUP, INC.

Condensed Financial Information of Registrant

Notes to Condensed Financial Information

(Parent Company Only)

1. Accounting policies

Organization

Kinsale Capital Group, Inc. (the "Company"), a Delaware domiciled insurance holding company, was formed on June 3, 2009 for the purpose of acquiring and managing insurance entities.

Basis of presentation

The accompanying condensed financial statements have been prepared using the equity method. Under the equity method, the investment in consolidated subsidiaries is stated at cost plus equity in undistributed earnings of consolidated subsidiaries since the date of acquisition. These condensed financial statements should be read in conjunction with the Company’s consolidated financial statements. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Estimates and assumptions

Preparation of the condensed financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates.

Credit agreement

On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters but may also be used for working capital and general corporate purposes.

Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. During the year ended December 31, 2020, the Company drew down $25.7 million on its Credit Facility. As of December 31, 2020, there was $42.6 million outstanding under the Credit Facility, net of debt issuance cost of $0.4 million, with a weighted average interest rate of 1.98%. For the year ended December 31, 2020, total interest expense under the Credit Facility was $1.0 million, of which $0.8 million was capitalized as part of the real estate project under construction. Interest paid was $0.8 million and $0.1 million for the years ending December 31, 2020 and 2019, respectively. There were no credit agreements outstanding at December 31, 2018.

The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2020, the Company was in compliance with all of its financial covenants under the Credit Facility.

Dividends from subsidiary

Cash dividends paid to Kinsale Capital Group, Inc. by its wholly-owned subsidiary, Kinsale Insurance Company, were $5.0 million for the year ended December 31, 2019, and $11.5 million for the year ended December 31, 2018. There were no cash dividends paid by the insurance subsidiary for the year ended December 31, 2020.

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Schedule V - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule V - Valuation and Qualifying Accounts

Schedule V

KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES

Valuation and Qualifying Accounts

			Additions		Deductions
(in thousands)	Balance at Beginning of Period (1)		Amounts Charged to Expense		Amounts Written Off or Disposals		Balance at End of Period
Year Ended December 31, 2020:
Allowance for premiums receivable	$	2,345	$	1,240	$	498	$	3,087
Valuation allowance for deferred tax assets	1,592		1,899		—		3,491
Allowance for reinsurance recoverables	282		—		—		282
Year Ended December 31, 2019:
Allowance for premiums receivable	2,615		835		745		2,705
Valuation allowance for deferred tax assets	780		812		—		1,592
Year Ended December 31, 2018:
Allowance for premiums receivable	2,112		663		160		2,615
Valuation allowance for deferred tax assets	690		90		—		780

See accompanying Report of Independent Registered Public Accounting Firm.

(1) For the year ended December 31, 2020, the balance at the beginning of period included a reduction of $0.4 million to the allowance for premiums receivable and the establishment of an allowance for reinsurance recoverables of $0.3 million, each of which related to the adoption of the new accounting standard for credit losses.

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Summary of significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Principles of consolidation

Principles of consolidation

The accompanying consolidated financial statements include the accounts of Kinsale Capital Group, Inc. and its wholly-owned subsidiaries (referred to as "Kinsale" or, with its subsidiaries, the "Company"). All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Use of estimates

Use of estimatesThe preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management periodically reviews its estimates and assumptions. These reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses, allowance for doubtful accounts and uncollectible reinsurance, fair value of investments, as well as evaluating the investment portfolio for credit impairments.

Cash and cash equivalents

Cash and cash equivalents

The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents.

Short-term investments

Short-term investments

Short-term investments are carried at cost, which approximates fair value. Short-term investments have maturities greater than three months but less than one year at the date of purchase. There were no short-term investments at December 31, 2020 or December 31, 2019.

Fixed maturity and equity securities

Fixed-maturity and equity securities

Fixed-maturity securities are classified as available-for-sale and reported at fair value. Unrealized gains and losses on these securities are excluded from net earnings but are recorded as a separate component of other comprehensive income and stockholders' equity, net of deferred income taxes.

Equity securities are reported at fair value. Changes in unrealized gains and losses in fair value of these investments are recognized in net income.

The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. See Note 2 for further discussion of credit losses.

Interest on fixed-maturity securities is credited to earnings as it accrues. Premiums and discounts are amortized or accreted using the effective interest method over the lives of the related fixed maturities, or to the earliest call date for securities purchased at a premium. Dividends on equity securities are included in earnings on the ex-dividend date. Realized gains and losses on disposition of investments are based on specific identification of the investments sold on the trade date.

Reinsurance

Reinsurance

Reinsurance premiums, commissions, and ceded unearned premiums on reinsured business are accounted for on a basis consistent with that used in accounting for the original policies issued and the terms of the reinsurance contracts. The Company receives ceding commissions in accordance with certain reinsurance treaties. The ceding commissions are capitalized and amortized as a reduction of underwriting, acquisition and insurance expenses.

Reinsurance recoverables represent paid losses and loss adjustment expenses and reserves for unpaid losses and loss adjustment expenses ceded to reinsurers that are subject to reimbursement under reinsurance treaties. The method for determining reinsurance recoverables for unpaid losses and loss adjustment expenses involves reviewing actuarial estimates of gross unpaid losses and loss adjustment expenses to determine the Company's ability to cede unpaid losses and loss adjustment expenses under the Company's existing reinsurance contracts. This method is continually reviewed and updated and any resulting adjustments are reflected in earnings in the period identified. See Note 8 for a further discussion of the Company's reinsurance program.

Premiums receivable, net

Premiums receivable, net

Premiums receivable balances are carried at face value, net of any allowance for doubtful accounts. The allowance for doubtful accounts represents an estimate of amounts considered uncollectible based on the Company’s assessment of the collectability of receivables that are past due. The Company recorded an allowance for doubtful accounts of $3.1 million and $2.7 million at December 31, 2020 and 2019, respectively, and believes that all other amounts due are collectible.

Deferred policy acquisition costs, net of ceding commissions

Deferred policy acquisition costs, net of ceding commissions

The Company defers commissions, net of ceding commissions, and certain other costs that are directly related to the successful acquisition of insurance contracts. All eligible costs are capitalized and charged to expense in proportion to premium earned over the estimated policy life. To the extent that unearned premiums on existing policies are not adequate to cover the related costs and expenses, referred to as a premium deficiency, deferred policy acquisition costs are charged to earnings. The Company considers anticipated investment income in determining whether a premium deficiency exists.

Property and equipment, net

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives range from 39 years for the parking deck and building, 15 to 20 years for land improvements, 7 to 10 years for furniture and equipment, 3 to 7 years for electronic data processing hardware and software, and from 2 to 5 years for leasehold improvements, which is the shorter of the estimated useful life or the lease term.

Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following:

	December 31,
	2020		2019
	(in thousands)
Building	$	31,675	$	—
Parking deck	5,072		—
Land	3,068		—
Equipment	2,770		2,353
Software	4,815		2,356
Furniture and fixtures	1,731		1,025
Leasehold improvements	—		984
Land improvements	317		—
Construction in progress - corporate headquarters	—		19,789
	49,448		26,507
Accumulated depreciation	(3,262)		(3,873)
Total property and equipment, net	$	46,186	$	22,634

At December 31, 2019, construction in progress includes the purchased land and capitalized expenses related to the construction of the new corporate headquarters' building and parking deck. During 2020, the construction of the headquarters and parking deck was substantially completed and the related fixed assets were placed into service.

During 2020, the Company sold a portion of both the land and parking deck for approximately $6.5 million to a real estate developer for the development of an apartment building. At December 31, 2020, the Company received $5.0 million of the proceeds from the sale and is expected to receive the remaining $1.5 million upon completion of the apartment building. This receivable is included in "other assets" on the accompanying consolidated balance sheet.

Intangible assets

Intangible assets

Intangible assets are recorded at fair value at the date of acquisition. The Company's intangible assets are comprised solely of indefinite-lived intangible assets, which arose from regulatory approvals granted by the various state insurance departments to write insurance business in the respective states on a non-admitted basis. In accordance with U.S. GAAP, amortization of indefinite-lived intangible assets is not permitted. Indefinite-lived intangible assets are tested for impairment during the fourth quarter on an annual basis, or earlier if there is reason to suspect that their values may have been diminished or impaired. There were no impairments recognized in 2020, 2019, or 2018. In addition, as of December 31, 2020, no triggering events occurred that suggested an updated review was necessary.

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses represent management's best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. The estimates are based on an actuarial method that uses management’s initial expected loss ratios, expected reporting patterns for losses based on industry data and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves for unpaid losses and loss adjustment expenses are adjusted as necessary. Such adjustments are reflected in the results of operations in the period in which they are determined. Although management believes that the reserves for losses and loss adjustment expenses are reasonable, due to the inherent uncertainty in estimating reserves for unpaid losses and loss adjustment expenses, it is possible that the Company’s actual incurred losses and loss adjustment expenses will not develop in a manner consistent with the assumptions inherent in the determination of these reserves. If actual liabilities exceed recorded amounts, there will be an increase to the Company’s reserves resulting in a reduction in net income and stockholders’ equity in the period in which the deficiency is identified. Furthermore, management may determine that recorded reserves are more than adequate to cover expected losses which will result in a reduction to the reserves. The

Company believes that the reserves for unpaid losses and loss adjustment expenses at December 31, 2020 and 2019 are adequate and represent a reasonable estimate of the Company's future obligations. See Note 7 for a further discussion of reserves for unpaid losses and loss adjustment expenses.

Revenue recognition

Revenue recognition

Premiums are recognized as revenue ratably over the term of the insurance contracts, net of ceded reinsurance. Unearned premiums are calculated on a daily pro rata basis.

Income taxes

Income taxes

Deferred income tax assets and liabilities are determined based on the difference between the recorded amounts and the tax bases of assets and liabilities, using enacted tax rates expected to be in effect during the year in which the basis differences reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded when it is more likely than not that some portion, or all, of the deferred tax assets will not be realizable. Management evaluates the realizability of the deferred tax assets and assesses the need for any valuation allowance adjustment. Valuation allowances on deferred tax assets are estimated based on the Company's assessment of the realizability of such amounts.

The Company provides for uncertain tax positions, and the related interest and penalties, based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. To the extent that the anticipated tax outcome of these uncertain tax positions changes, such changes in estimate will impact the income tax provision in the period in which such determination is made. The Company recognizes accrued interest and penalties related to uncertain tax positions as a component of income tax expense.

The Company uses the portfolio approach to release stranded tax effects in accumulated other comprehensive income ("AOCI") related to its available-for-sale fixed-maturity securities. Under this approach, stranded tax effects remaining in AOCI are released only when the entire portfolio of the available-for-sale fixed-maturity securities are liquidated, sold or extinguished.

Commitments and contingencies

Commitments and contingencies

Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

Fair value of financial instruments

Fair value of financial instruments

The fair values of certain financial instruments are determined based on the fair value hierarchy. U.S. GAAP guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance also describes three levels of inputs that may be used to measure fair value.

The following was considered in the estimation of fair value for each class of financial instruments for which it was practicable to estimate that value. The Company’s investment accounting vendor uses independent pricing vendors to estimate the fair value of fixed-maturity securities and the Company’s management reviews these prices for reasonableness. U.S. Treasury securities that have quoted prices in active markets are included in the amounts disclosed as Level 1. For other fixed-maturity securities, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these fixed-maturity securities are included in the amounts disclosed as Level 2. For those fixed-maturity securities where significant inputs are unobservable, Level 3 inputs, the Company's investment accounting vendor obtains valuations from pricing vendors using the market approach and income approach valuation techniques.

For equity securities, the Company’s investment accounting vendor uses prices from independent pricing vendors to estimate fair value. The fair value estimates of exchange traded funds are based on quoted prices in an active market and

are disclosed as Level 1. The fair value estimates of preferred stock are based on observable market data and, as a result, are disclosed as Level 2.

Fair value disclosures for investments are included in Notes 2 and 3.

Stock-based compensation

Stock-based compensation

Stock-based compensation is expensed based upon the estimated fair value of employee stock awards. Compensation cost for awards of equity instruments to employees is measured based on the grant-date fair value of those awards and compensation expense is recognized over the service period that the awards vest. Forfeitures of stock-based compensation awards are recognized as they occur. See Note 9 for further discussion and related disclosures regarding stock-based compensation.

Recently adopted accounting pronouncements

Recently adopted accounting pronouncements

Accounting Standards Update ("ASU") 2016-13, Financial Instruments – Credit Losses (Topic 326)

On June 16, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. The update requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected by means of an allowance for credit losses that runs through net income. Credit losses relating to available-for-sale fixed-maturity securities must also be recorded through an allowance for credit losses. However, the amendments limit the amount of the allowance to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under previous U.S. GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. The FASB has issued additional ASUs on Topic 326 that do not change the core principle of the guidance in ASU 2016-13 but clarify certain aspects of it.

Effective January 1, 2020, the Company adopted this ASU using the modified-retrospective approach and recorded a cumulative effect adjustment to beginning retained earnings. The adoption of this ASU resulted in the recognition of an allowance for credit loss related to the Company’s reinsurance recoverables. However, since the Company enters into contracts with reinsurers that have A.M. Best ratings of “A” (Excellent) or better, the allowance was not material to the Company’s consolidated financial statements.

ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

On August 29, 2018, the FASB issued new guidance on a customer's accounting for implementation, set-up and other up-front costs incurred in a cloud computing arrangement hosted by the vendor. The new guidance requires an entity to determine the stage of a project that the implementation activity relates to and the nature of the associated costs in order to determine whether those costs should be expensed as incurred or capitalized. The new guidance also requires the entity to amortize the capitalized implementation costs as an expense over the term of the hosting arrangement. Effective January 1, 2020, the Company adopted ASU 2018-15 using a modified-retrospective approach. The adoption of ASU 2018-15 did not have a material impact on the Company's consolidated financial statements.

Prospective accounting pronouncements

Prospective accounting pronouncements

ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other existing guidance to simplify several other income tax accounting matters. The updated guidance is effective for annual reporting periods beginning after December 15, 2020. Early adoption is permitted. The adoption of the guidance will not have a material effect on the Company’s consolidated financial statements.

There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company's consolidated financial statements.

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Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following:

	December 31,
	2020		2019
	(in thousands)
Building	$	31,675	$	—
Parking deck	5,072		—
Land	3,068		—
Equipment	2,770		2,353
Software	4,815		2,356
Furniture and fixtures	1,731		1,025
Leasehold improvements	—		984
Land improvements	317		—
Construction in progress - corporate headquarters	—		19,789
	49,448		26,507
Accumulated depreciation	(3,262)		(3,873)
Total property and equipment, net	$	46,186	$	22,634

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Investments (Tables)

12 Months Ended

Dec. 31, 2020

Investments [Abstract]

Available-for-sale Investments

The following tables summarize the Company’s available-for-sale investments at December 31, 2020 and 2019:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	216,181	$	14,792	$	(67)	$	230,906
Corporate and other securities	294,854		21,840		(86)		316,608
Asset-backed securities	236,813		4,230		(382)		240,661
Commercial mortgage-backed securities	66,110		4,886		(27)		70,969
Residential mortgage-backed securities	217,859		4,938		(141)		222,656
Total fixed-maturity investments	$	1,031,817	$	50,686	$	(703)	$	1,081,800

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	110	$	2	$	—	$	112
Obligations of states, municipalities and political subdivisions	166,312		7,542		(961)		172,893
Corporate and other securities	180,287		4,736		(255)		184,768
Asset-backed securities	141,123		1,272		(471)		141,924
Commercial mortgage-backed securities	54,627		1,658		(239)		56,046
Residential mortgage-backed securities	172,358		1,819		(388)		173,789
Total fixed-maturity investments	$	714,817	$	17,029	$	(2,314)	$	729,532

Available-for-sale Securities in a Unrealized Loss Position

	December 31, 2020
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	6,412	$	(67)	$	—	$	—	$	6,412	$	(67)
Corporate and other securities	3,829		(86)		—		—		3,829		(86)
Asset-backed securities	57,750		(149)		23,825		(233)		81,575		(382)
Commercial mortgage-backed securities	4,971		(27)		—		—		4,971		(27)
Residential mortgage-backed securities	46,869		(129)		266		(12)		47,135		(141)
Total fixed-maturity investments	$	119,831	$	(458)	$	24,091	$	(245)	$	143,922	$	(703)

	December 31, 2019
	Less than 12 Months				12 Months or Longer				Total
	Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Losses
	(in thousands)
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	28,997	$	(961)	$	254	$	—	$	29,251	$	(961)
Corporate and other securities	22,409		(251)		1,509		(4)		23,918		(255)
Asset-backed securities	21,371		(79)		44,115		(392)		65,486		(471)
Commercial mortgage-backed securities	16,352		(224)		2,508		(15)		18,860		(239)
Residential mortgage-backed securities	36,986		(148)		24,815		(240)		61,801		(388)
Total fixed-maturity investments	$	126,115	$	(1,663)	$	73,201	$	(651)	$	199,316	$	(2,314)

Contractual Maturities of Available-for-sale Fixed Maturity Securities

The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at December 31, 2020 are summarized, by contractual maturity, as follows:

	Amortized		Estimated
	Cost		Fair Value
	(in thousands)
Due in one year or less	$	15,545	$	15,782
Due after one year through five years	107,150		115,390
Due after five years through ten years	156,958		169,711
Due after ten years	231,382		246,631
Asset-backed securities	236,813		240,661
Commercial mortgage-backed securities	66,110		70,969
Residential mortgage-backed securities	217,859		222,656
Total fixed maturities	$	1,031,817	$	1,081,800

Net Investment Income

The following table presents the components of net investment income:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Interest:
Taxable bonds	$	20,493	$	14,853	$	9,474
Municipal bonds (tax exempt)	3,618		3,692		4,298
Cash equivalents and short-term investments	262		842		1,017
Dividends on equity securities	3,512		2,136		2,014
Gross investment income	27,885		21,523		16,803
Investment expenses	(1,775)		(1,390)		(1,115)
Net investment income	$	26,110	$	20,133	$	15,688

Schedule of Realized Gain (Loss)

The following table presents realized investment gains and losses:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Fixed-maturity securities:
Realized gains	$	4,022	$	567	$	263
Realized losses	(383)		(79)		(17)
Net realized gains from fixed-maturity securities	3,639		488		246
Equity securities:
Realized gains	—		556		57
Realized losses	(119)		(688)		(22)
Net realized (losses) gains from equity securities	(119)		(132)		35
Short-term securities - realized gains	13		3		—
Net realized investment gains	$	3,533	$	359	$	281

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Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

The following tables present the balances of assets measured at fair value on a recurring basis as of December 31, 2020 and 2019, by level within the fair value hierarchy.

	December 31, 2020
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
Obligations of states, municipalities and political subdivisions	$	—	$	230,906	$	—	$	230,906
Corporate and other securities	—		316,608		—		316,608
Asset-backed securities	—		240,661		—		240,661
Commercial mortgage-backed securities	—		70,969		—		70,969
Residential mortgage-backed securities	—		222,656		—		222,656
Total fixed maturities	—		1,081,800		—		1,081,800
Equity securities:
Exchange traded funds	98,050		—		—		98,050
Nonredeemable preferred stock	—		31,612		—		31,612
Total equity securities	98,050		31,612		—		129,662
Total	$	98,050	$	1,113,412	$	—	$	1,211,462

	December 31, 2019
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Fixed maturities:
U.S. Treasury securities and obligations of U.S. government agencies	$	112	$	—	$	—	$	112
Obligations of states, municipalities and political subdivisions	—		172,893		—		172,893
Corporate and other securities	—		184,768		—		184,768
Asset-backed securities	—		141,924		—		141,924
Commercial mortgage-backed securities	—		56,046		—		56,046
Residential mortgage-backed securities	—		173,789		—		173,789
Total fixed maturities	112		729,420		—		729,532
Equity securities:
Exchange traded funds	54,463		—		—		54,463
Nonredeemable preferred stock	—		23,831		—		23,831
Total equity securities	54,463		23,831		—		78,294
Total	$	54,575	$	753,251	$	—	$	807,826

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Deferred policy acquisition costs (Tables)

12 Months Ended

Dec. 31, 2020

Deferred Policy Acquisition Costs Disclosures [Abstract]

Deferred Policy Acquisition Costs

The following table presents the amounts of policy acquisition costs deferred and amortized for the years ended:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Balance, beginning of year	$	23,564	$	14,801	$	11,775
Policy acquisition costs deferred:
Direct commissions	80,682		56,841		40,546
Ceding commissions	(18,879)		(12,373)		(11,239)
Other underwriting and policy acquisition costs	4,478		3,727		3,141
Policy acquisition costs deferred	66,281		48,195		32,448
Amortization of net policy acquisition costs	(57,933)		(39,432)		(29,422)
Balance, end of year	$	31,912	$	23,564	$	14,801

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Underwriting, acquisition and insurance expenses (Tables)

12 Months Ended

Dec. 31, 2020

Underwriting, Acquisition and Insurance Expenses [Abstract]

Underwriting, Acquisition and Insurance Expenses

Underwriting, acquisition and insurance expenses consist of the following:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Underwriting, acquisition and insurance expenses incurred:
Direct commissions	$	69,922	$	48,382	$	36,885
Ceding commissions	(16,145)		(12,347)		(10,448)
Other operating expenses	40,519		34,182		26,988
Total	$	94,296	$	70,217	$	53,425

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Income taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Components of Income Tax Expense (Benefit)

Income tax expense includes the following components for the years ending December 31, 2020, 2019 and 2018:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Current federal income tax expense	$	11,378	$	12,860	$	9,923
Deferred federal income tax (benefit) expense	616		(125)		(3,230)
Income tax expense	$	11,994	$	12,735	$	6,693

Effective Income Tax Rate Reconciliation

The Company’s effective income tax rate on income before income taxes differs from the prevailing federal income tax rate and is summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Income tax expense at federal income tax rate	$	21,087	$	15,971	$	8,501
Stock options exercised	(7,634)		(2,411)		(918)
Tax-exempt investment income	(565)		(577)		(672)
Restricted stock award vesting	(658)		(153)		—
Other	(236)		(95)		(218)
Total	$	11,994	$	12,735	$	6,693

Deferred Tax Assets and Liabilities

The significant components of the net deferred tax (liability) asset are summarized as follows:

	December 31,
	2020		2019
	(in thousands)
Deferred tax assets:
Unpaid losses and loss adjustment expenses	$	11,736	$	8,199
Unearned premiums	9,942		7,193
Organizational costs	128		162
Stock compensation	865		765
State operating loss carryforwards	3,833		1,497
Allowance for doubtful accounts	649		570
Other	126		256
Deferred tax assets before allowance	27,279		18,642
Less: valuation allowance	(3,491)		(1,592)
Total deferred tax assets	23,788		17,050
Deferred tax liabilities:
Unrealized gains on fixed-maturity securities	10,497		3,090
Unrealized gains on equity securities	6,552		2,995
Deferred policy acquisition costs, net of ceding commissions	6,701		4,949
Property and equipment	2,433		10
Intangible assets	743		743
Transition adjustment for loss reserve discount	1,281		1,537
Other	229		352
Total deferred tax liabilities	28,436		13,676
Net deferred tax (liability) asset	$	(4,648)	$	3,374

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Reserves for unpaid losses and loss adjustment expenses (Tables)

12 Months Ended

Dec. 31, 2020

Claims Development

Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability

The reconciliation of the net incurred and paid claims development tables to the liability for unpaid claims and claim adjustment expenses in the consolidated statement of financial position is as follows:

(in thousands)	December 31, 2020
Net outstanding liabilities
Property	$	22,165
Casualty - claims made	98,774
Casualty - occurrence	383,309
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance	504,248
Reinsurance recoverable on unpaid claims
Property	10,800
Casualty - claims made	61,100
Casualty - occurrence	11,830
Total reinsurance recoverable on unpaid claims	83,730
Unallocated claims adjustment expenses	48,035
Gross liability for unpaid claims and claim adjustment expense	$	636,013

Unpaid Losses and Loss Adjustment Expenses

The following table presents a reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses:

	December 31,
	2020		2019		2018
	(in thousands)
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	$	460,058	$	369,152	$	315,717
Less: reinsurance recoverable on unpaid losses	69,792		55,389		48,224
Adoption of new accounting standard for credit losses	(282)		—		—
Net reserves for unpaid losses and loss adjustment expenses, beginning of year	390,548		313,763		267,493
Incurred losses and loss adjustment expenses:
Current year	277,140		178,986		135,078
Prior year	(13,338)		(9,423)		(7,037)
Total net losses and loss adjustment expenses incurred	263,802		169,563		128,041
Payments:
Current year	27,664		19,054		14,118
Prior year	74,403		74,006		67,653
Total payments	102,067		93,060		81,771
Net reserves for unpaid losses and loss adjustment expenses, end of year	552,283		390,266		313,763
Reinsurance recoverable on unpaid losses, net of allowance	83,730		69,792		55,389
Gross reserves for unpaid losses and loss adjustment expenses, end of year	$	636,013	$	460,058	$	369,152

Property [Member]

Claims Development

Short-duration Insurance Contracts, Claims Development

Property

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,										As of December 31, 2020
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
	($ in thousands)
2016	$	4,177	$	3,392	$	3,301	$	3,278	$	3,270	$	—	286
2017			12,473		11,705		11,676		11,631		19		1,041
2018					11,559		12,004		12,698		88		649
2019							14,914		13,909		430		636
2020									40,612		7,139		2,189
							Total		$	82,120

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
	($ in thousands)
2016	$	1,867	$	3,257	$	3,265	$	3,265	$	3,270
2017			9,938		11,233		11,602		11,608
2018					9,132		11,646		12,599
2019							9,852		12,581
2020									19,897
							Total		59,955
			All outstanding liabilities before 2016, net of reinsurance						—
			Liabilities for claims and claim adjustment expenses, net of reinsurance						$	22,165

Short-duration Insurance Contracts, Schedule of Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5
Property	66.9	%	23.3	%	3.6	%	—	%	0.2	%

Casualty - claims made [Member]

Claims Development

Short-duration Insurance Contracts, Claims Development

Casualty - Claims Made

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	4,246	$	3,844	$	3,646	$	3,609	$	3,560	$	3,374	$	3,261	$	3,225	$	3,206	$	3,177	$	73	76
2012			7,913		5,749		4,205		3,102		2,845		2,477		2,314		2,207		2,136		190		138
2013					15,238		11,639		9,113		7,917		7,002		6,463		6,128		6,087		465		228
2014							18,847		14,289		11,748		11,217		10,948		10,988		10,620		824		273
2015									18,883		16,777		14,896		13,583		13,942		13,548		1,378		258
2016											19,170		14,693		14,675		14,322		13,583		2,116		310
2017													18,116		17,097		16,120		15,794		3,703		369
2018															22,429		20,234		18,612		7,275		458
2019																	34,693		29,056		17,500		538
2020																			55,630		48,966		738
																	Total		$	168,243

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	139	$	1,037	$	1,392	$	2,116	$	3,044	$	3,042	$	3,042	$	3,065	$	3,104	$	3,104
2012			153		475		877		1,024		1,090		1,882		1,946		1,946		1,946
2013					499		1,915		4,436		5,070		5,320		5,439		5,482		5,612
2014							435		1,865		5,039		6,385		8,290		9,415		9,491
2015									217		4,496		7,563		9,238		11,372		11,522
2016											1,158		3,015		6,907		9,839		11,381
2017													340		4,897		8,252		10,484
2018															507		5,030		8,931
2019																	2,487		6,005
2020																			1,002
																	Total		69,478
	All outstanding liabilities before 2011, net of reinsurance																		9
	Liabilities for claims and claim adjustment expenses, net of reinsurance																		$	98,774

Casualty - occurrence [Member]

Claims Development

Short-duration Insurance Contracts, Claims Development

Casualty - Occurrence

	Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,																				As of December 31, 2020
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020		Total of IBNR Liabilities Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
2011	$	5,839	$	5,940	$	5,757	$	7,340	$	7,613	$	8,142	$	8,375	$	9,023	$	9,379	$	9,318	$	360	227
2012			16,977		17,436		18,803		20,401		20,579		22,001		22,401		23,223		23,197		1,288		586
2013					30,616		28,771		28,037		29,039		31,731		33,248		33,973		33,128		2,978		856
2014							47,805		40,668		38,049		36,678		39,313		41,859		42,434		5,843		1,196
2015									59,717		51,739		49,122		52,100		54,697		54,090		9,323		1,496
2016											61,440		55,680		53,549		55,534		57,401		13,928		1,434
2017													71,126		67,151		68,985		70,641		24,096		1,632
2018															86,157		78,331		78,386		44,307		1,606
2019																	112,266		109,994		81,322		1,644
2020																			154,619		146,945		1,076
																	Total		$	633,208

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	For the Years Ended December 31,
Accident Year	2011 Unaudited		2012 Unaudited		2013 Unaudited		2014 Unaudited		2015 Unaudited		2016 Unaudited		2017 Unaudited		2018 Unaudited		2019 Unaudited		2020
2011	$	207	$	1,596	$	2,519	$	3,788	$	4,575	$	6,363	$	6,868	$	8,510	$	8,693	$	8,745
2012			757		4,441		7,850		11,238		14,382		16,474		19,383		20,707		21,408
2013					1,099		4,469		7,957		14,890		21,348		26,715		28,248		29,610
2014							698		3,081		8,489		17,576		23,771		31,026		34,338
2015									941		3,161		12,685		28,385		37,690		41,724
2016											1,099		6,015		17,225		28,924		34,437
2017													1,581		9,352		22,407		37,736
2018															2,638		10,995		22,860
2019																	3,944		16,687
2020																			2,400
																	Total		249,945
					All outstanding liabilities before 2011, net of reinsurance														46
			Liabilities for claims and claim adjustment expenses, net of reinsurance																$	383,309

Casualty [Member]

Claims Development

Short-duration Insurance Contracts, Schedule of Historical Claims Duration

The following is supplementary information about average historical claims duration as of December 31, 2020:

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	(Unaudited)
Years	1		2		3		4		5		6		7		8		9		10
Casualty - claims made	4.9	%	21.2	%	24.3	%	14.4	%	13.6	%	10.1	%	1.1	%	1.0	%	0.6	%	—	%
Casualty - occurrence	2.5	%	10.3	%	14.8	%	20.2	%	13.8	%	13.8	%	7.6	%	9.1	%	2.5	%	0.6	%

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Reinsurance (Tables)

12 Months Ended

Dec. 31, 2020

Reinsurance Disclosures [Abstract]

Effects of Reinsurance on Premiums Written and Earned

The following table summarizes the effect of reinsurance on premiums written and earned:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Written:
Direct	$	552,814	$	389,569	$	275,538
Assumed	—		125		—
Ceded	(74,595)		(47,633)		(39,924)
Net written	$	478,219	$	342,061	$	235,614
Earned:
Direct	$	479,181	$	330,464	$	250,397
Assumed	21		104		—
Ceded	(66,448)		(47,587)		(37,709)
Net earned	$	412,754	$	282,981	$	212,688

Reinsurance Recoverables

The following table presents reinsurance recoverables on paid and unpaid losses as of December 31, 2020 and 2019:

	December 31, 2020		December 31, 2019
	(in thousands)
Reinsurance recoverables on paid losses	$	9,485	$	2,782
Reinsurance recoverables on unpaid losses	83,730		69,792
Reinsurance recoverables	$	93,215	$	72,574

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Attributable to Parent [Abstract]

Assumptions Used in Estimating Fair Value of Options Granted

The value of the options granted was estimated at the date of grant using the Black-Scholes pricing model using the following assumptions:

Risk-free rate of return	1.26	%
Dividend yield	1.25	%
Expected share price volatility(1)	18.50	%
Expected life in years(2)	6.3 years

Share-based Compensation, Stock Options, Activity

A summary of option activity as of December 31, 2020, and changes during the year then ended is presented below:

	Number of Shares	Weighted-average exercise price		Weighted-average remaining years of contractual life	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2019	614,345	$	16.00
Granted	—	—
Forfeited	(234)	16.00
Exercised	(226,373)	16.00
Outstanding at December 31, 2020	387,738	$	16.00	5.6	$	71,394
Exercisable at December 31, 2020	387,738	$	16.00	5.6	$	71,394

Nonvested Restricted Stock Shares Activity

A summary of restricted stock activity under the equity compensation plans for the year ended is as follows:

	December 31, 2020
	Number of Shares	Weighted Average Grant Date Fair Value per Share
Nonvested outstanding at the beginning of the period	122,723	$	67.01
Granted	42,694	$	147.45
Vested	(41,010)	$	63.86
Forfeited	(16,015)	$	83.79
Nonvested outstanding at the end of the period	108,392	$	97.40

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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share

The following table represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements:

	Year ended December 31,
	2020		2019		2018
	(in thousands, except per share data)
Net income	$	88,419	$	63,316	$	33,787
Weighted average common shares outstanding - basic	22,319		21,528		21,090
Dilutive effect of shares issued under stock compensation arrangements:
Stock options	469		570		591
Restricted stock awards	64		38		4
Total dilutive effect of shares issued under stock compensation arrangements	533		608		595
Weighted average common shares outstanding - diluted	22,852		22,136		21,685
Earnings per common share:
Basic	$	3.96	$	2.94	$	1.60
Diluted	$	3.87	$	2.86	$	1.56

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Other comprehensive income (loss) (Tables)

12 Months Ended

Dec. 31, 2020

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other Comprehensive Income (Loss)

The following table summarizes the components of other comprehensive income (loss):

	Year Ending December 31,
	2020		2019		2018
	(in thousands)
Unrealized gains (losses) on fixed-maturity securities arising during the period, before income taxes:	$	37,387	$	19,190	$	(6,664)
Income tax (expense) benefit	(7,851)		(4,029)		1,399
Unrealized gains (losses) arising during the period, net of income taxes	29,536		15,161		(5,265)
Less reclassification adjustment:
Net realized investment gains on available-for-sale investments	2,119		489		258
Income tax benefit	(445)		(102)		(54)
Reclassification adjustment included in net income	1,674		387		204
Other comprehensive income (loss)	$	27,862	$	14,774	$	(5,469)

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Underwriting information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Gross Written Premiums by Underwriting Division

Gross written premiums by underwriting division are presented below:

	Year Ended December 31,
	2020		2019		2018
	(in thousands)
Commercial:
Construction	$	87,206	$	71,035	$	50,879
Small business	83,289		63,181		44,368
Excess casualty	76,715		51,225		37,398
Commercial property	51,789		29,115		9,166
Product liability	38,306		26,333		20,049
Allied health	37,562		23,962		16,815
Life sciences	31,027		17,821		14,505
General casualty	29,205		23,279		17,625
Professional liability	27,051		20,029		16,717
Management liability	24,061		14,820		8,161
Energy	16,985		15,371		15,586
Environmental	8,568		5,179		2,205
Health care	7,666		5,963		5,725
Inland marine	6,910		3,467		2,046
Public entity	3,007		580		1,193
Commercial insurance	1,757		1,674		1,096
Total commercial	531,104		373,034		263,534
Personal:
Personal insurance	21,710		16,660		12,004
Total	$	552,814	$	389,694	$	275,538

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Statutory financial information (Tables)

12 Months Ended

Dec. 31, 2020

Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]

Statutory Net Income and Statutory Capital and Surplus

Statutory net income and statutory capital and surplus for Kinsale Insurance as of December 31, 2020, 2019, and 2018 and for the years then ended are summarized as follows:

	Year ended December 31,
	2020		2019		2018
	(in thousands)
Statutory net income	$	54,338	$	40,917	$	34,206
Statutory capital and surplus	$	476,066	$	348,811	$	233,500

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Unaudited Seleted Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Table Text Block]

The following is a summary of the unaudited quarterly results of operations:

	2020 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	124,036	$	134,091	$	144,777	$	149,910
Total revenues	80,346		117,707		122,501		139,332
Net income	5,086		30,262		14,890		38,181
Comprehensive (loss) income	(4,137)		57,270		21,444		41,704
Earnings per share - basic	$	0.23	$	1.37	$	0.66	$	1.69
Earnings per share - diluted	$	0.22	$	1.33	$	0.65	$	1.65

	2019 Quarter
(in thousands, except per share data)	First		Second		Third		Fourth
Gross written premiums	$	84,626	$	94,947	$	97,984	$	112,137
Total revenues	72,185		72,572		78,327		92,804
Net income	18,720		13,767		12,976		17,853
Comprehensive income	25,500		20,322		16,218		16,050
Earnings per share - basic	$	0.88	$	0.65	$	0.60	$	0.81
Earnings per share - diluted	$	0.86	$	0.63	$	0.58	$	0.79

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Schedule II - Condensed Financial Information of Registrant (Tables)

12 Months Ended

Dec. 31, 2020

Condensed Financial Information Disclosure [Abstract]

Condensed Balance Sheet

	December 31,
	2020		2019
	(in thousands)
Assets
Cash and cash equivalents	$	8,395	$	14,726
Due from subsidiaries	7,792		16,836
Investment in subsidiaries	600,931		391,071
Deferred income tax asset, net	587		519
Income taxes recoverable	1,177		—
Other assets	290		208
Total assets	$	619,172	$	423,360
Liabilities and Stockholders' Equity
Liabilities:
Accounts payable and accrued expenses	$	302	$	260
Income taxes payable	—		434
Credit facility	42,570		16,744
Other liabilities	62		42
Total liabilities	42,934		17,480
Stockholders’ equity:
Common stock	228		222
Additional paid-in capital	291,315		229,229
Retained earnings	243,315		162,911
Accumulated other comprehensive income	41,380		13,518
Stockholders’ equity	576,238		405,880
Total liabilities and stockholders’ equity	$	619,172	$	423,360

Condensed Income Statement

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Revenues:
Management fees from subsidiaries	$	5,709	$	4,502	$	3,215
Total revenues	5,709		4,502		3,215
Expenses:
Other operating expenses	6,624		5,215		4,055
Other expenses	1,332		—		—
Total expenses	7,956		5,215		4,055
Loss before income taxes	(2,247)		(713)		(840)
Income tax benefit	(8,779)		(2,714)		(1,158)
Income before equity in net income of subsidiaries	6,532		2,001		318
Equity in net income of subsidiaries	81,887		61,315		33,469
Net income	88,419		63,316		33,787
Other comprehensive income (loss):
Equity in other comprehensive earnings (losses) of subsidiaries	27,862		14,774		(5,469)
Total comprehensive income	$	116,281	$	78,090	$	28,318

Condensed Cash Flow Statement

	Years Ended December 31,
	2020		2019		2018
	(in thousands)
Operating activities
Net income	$	88,419	$	63,316	$	33,787
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred tax benefit	(68)		(150)		(170)
Stock compensation expense	3,575		2,742		1,597
Equity in undistributed earnings of subsidiaries	(81,887)		(61,315)		(33,469)
Changes in operating assets and liabilities	7,520		(14,247)		(633)
Dividends received from subsidiary	—		5,000		11,500
Net cash provided by (used in) operating activities	17,559		(4,654)		12,612
Investing activities
Contributions to subsidiary	(100,034)		(68,391)		—
Net cash used in investing activities	(100,034)		(68,391)		—
Financing activities
Common stock issued, net of transaction costs	56,698		65,879		—
Common stock issued, stock options exercised	3,622		2,750		1,808
Payroll taxes withheld and remitted on share-based payments	(1,803)		(617)		—
Dividends paid	(8,073)		(6,929)		(5,906)
Proceeds from credit facility	25,700		17,300		—
Debt issuance costs	—		(628)		—
Net cash provided by (used in) financing activities	76,144		77,755		(4,098)
Net change in cash and cash equivalents	(6,331)		4,710		8,514
Cash and cash equivalents at beginning of year	14,726		10,016		1,502
Cash and cash equivalents at end of year	$	8,395	$	14,726	$	10,016

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Description of business - (Details)	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states in which company is authorized to write business	50

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Summary of significant accounting policies (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 3,100	$ 2,700
Short-term Investments	$ 0	$ 0

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Intangible assets and other information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Excess and surplus lines insurance authorization [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 0	$ 0	$ 0

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Summary of significant accounting policies Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 49,448	$ 26,507
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(3,262)	(3,873)
Property, Plant and Equipment, Net	46,186	22,634
Transaction price of sale of land and parking deck	6,500
Proceeds receivable from sale of land and parking deck	1,500
Proceeds received from sale of land and parking deck	5,000
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,770	2,353
Software Development [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 4,815	2,356
Technology Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Technology Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 0	984
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 0	19,789
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,068	0
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 31,675	0
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Parking [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 5,072	0
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 317	0
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,731	$ 1,025
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years

XML

Investments, Available-for-sale Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,031,817	$ 714,817
Gross Unrealized Gains	50,686	17,029
Gross Unrealized Losses	703	2,314
Estimated Fair Value	1,081,800	729,532
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		110
Gross Unrealized Gains		2
Gross Unrealized Losses		0
Estimated Fair Value		112
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	216,181	166,312
Gross Unrealized Gains	14,792	7,542
Gross Unrealized Losses	67	961
Estimated Fair Value	230,906	172,893
Corporate and other securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	294,854	180,287
Gross Unrealized Gains	21,840	4,736
Gross Unrealized Losses	86	255
Estimated Fair Value	316,608	184,768
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	236,813	141,123
Gross Unrealized Gains	4,230	1,272
Gross Unrealized Losses	382	471
Estimated Fair Value	240,661	141,924
Commercial mortgage-backed aecurities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	66,110	54,627
Gross Unrealized Gains	4,886	1,658
Gross Unrealized Losses	27	239
Estimated Fair Value	70,969	56,046
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	217,859	172,358
Gross Unrealized Gains	4,938	1,819
Gross Unrealized Losses	141	388
Estimated Fair Value	$ 222,656	$ 173,789

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Investments, Available-for-sale Securities in a Loss Position (Details) $ in Thousands	Dec. 31, 2020 USD ($) Rate	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	$ 119,831	$ 126,115
Less than 12 months, Gross Unrealized Losses	458	1,663
12 Months or Longer, Estimated Fair Value	24,091	73,201
12 Months or Longer, Gross Unrealized Losses	245	651
Total Estimated Fair Value	143,922	199,316
Total Gross Unrealized Losses	$ (703)	(2,314)
Number of available-for-sale securities in unrealized loss positions	60
Number of available-for-sale securities in unrealized loss positions, greater than one year	12
Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Percentage of securities rated A- or better | Rate	81.60%
Credit losses	$ 0
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	6,412	28,997
Less than 12 months, Gross Unrealized Losses	67	961
12 Months or Longer, Estimated Fair Value	0	254
12 Months or Longer, Gross Unrealized Losses	0	0
Total Estimated Fair Value	6,412	29,251
Total Gross Unrealized Losses	(67)	(961)
Corporate and other securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	3,829	22,409
Less than 12 months, Gross Unrealized Losses	86	251
12 Months or Longer, Estimated Fair Value	0	1,509
12 Months or Longer, Gross Unrealized Losses	0	4
Total Estimated Fair Value	3,829	23,918
Total Gross Unrealized Losses	(86)	(255)
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	57,750	21,371
Less than 12 months, Gross Unrealized Losses	149	79
12 Months or Longer, Estimated Fair Value	23,825	44,115
12 Months or Longer, Gross Unrealized Losses	233	392
Total Estimated Fair Value	81,575	65,486
Total Gross Unrealized Losses	(382)	(471)
Commercial mortgage-backed aecurities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	4,971	16,352
Less than 12 months, Gross Unrealized Losses	27	224
12 Months or Longer, Estimated Fair Value	0	2,508
12 Months or Longer, Gross Unrealized Losses	0	15
Total Estimated Fair Value	4,971	18,860
Total Gross Unrealized Losses	(27)	(239)
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	46,869	36,986
Less than 12 months, Gross Unrealized Losses	129	148
12 Months or Longer, Estimated Fair Value	266	24,815
12 Months or Longer, Gross Unrealized Losses	12	240
Total Estimated Fair Value	47,135	61,801
Total Gross Unrealized Losses	$ (141)	$ (388)

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Investments, Contractual Maturities of Available-for-sale Fixed Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost [Abstract]
Due in one year or less, Amortized Cost	$ 15,545
Due after one year through five years, Amortized Cost	107,150
Due after five years through ten years, Amortized Cost	156,958
Due after ten years, Amortized Cost	231,382
Total fixed maturities, Amortized Cost	1,031,817	$ 714,817
Estimated Fair Value [Abstract]
Due in one year or less, Estimated Fair Value	15,782
Due after one year through five years, Estimated Fair Value	115,390
Due after five years through ten years, Estimated Fair Value	169,711
Due after ten years, Estimated Fair Value	246,631
Estimated Fair Value	1,081,800	729,532
Asset-backed securities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	236,813
Total fixed maturities, Amortized Cost	236,813	141,123
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	240,661
Estimated Fair Value	240,661	141,924
Residential mortgage-backed securities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	217,859
Total fixed maturities, Amortized Cost	217,859	172,358
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	222,656
Estimated Fair Value	222,656	173,789
Commercial mortgage-backed aecurities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	66,110
Total fixed maturities, Amortized Cost	66,110	54,627
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	70,969
Estimated Fair Value	$ 70,969	$ 56,046

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Investments, Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest [Abstract]
Taxable bonds	$ 20,493	$ 14,853	$ 9,474
Municipal bonds (tax exempt)	3,618	3,692	4,298
Cash equivalents and short-term investments	262	842	1,017
Dividends on equity securities	3,512	2,136	2,014
Gross investment income	27,885	21,523	16,803
Investment expenses	(1,775)	(1,390)	(1,115)
Net investment income	$ 26,110	$ 20,133	$ 15,688

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Investments Realized Investment Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fixed-maturity securities - realized gains (losses) [Abstract]
Realized gains	$ 4,022	$ 567	$ 263
Realized losses	(383)	(79)	(17)
Net realized gains from fixed-maturity securities	3,639	488	246
Equity securities - realized gains (losses) [Abstract]
Realized gains	0	556	57
Realized losses	(119)	(688)	(22)
Net realized gains (losses) from equity securities	(119)	(132)	35
Short-term securities - realized gain	13	3	0
Net realized investment gains	$ 3,533	$ 359	$ 281

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Investments, Unrealized Gain (Losses) on Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Change in unrealized gains (losses), fixed-maturity securities	$ 35.3	$ 18.7	$ (6.9)

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Investments Investment Deposits and Payables (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Invested assets on deposit with state regulatory authorities	$ 6.9	$ 6.9

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Fair value measurements (Details) - Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,211,462	$ 807,826
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	98,050	54,575
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,113,412	753,251
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Fixed Maturities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	1,081,800	729,532
Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	112
Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	1,081,800	729,420
Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale		112
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale		112
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale		0
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale		0
Obligations of states, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	230,906	172,893
Obligations of states, municipalities and political subdivisions [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Obligations of states, municipalities and political subdivisions [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	230,906	172,893
Obligations of states, municipalities and political subdivisions [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Corporate and other securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	316,608	184,768
Corporate and other securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Corporate and other securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	316,608	184,768
Corporate and other securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	240,661	141,924
Asset-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Asset-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	240,661	141,924
Asset-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Commercial mortgage-backed aecurities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	70,969	56,046
Commercial mortgage-backed aecurities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Commercial mortgage-backed aecurities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	70,969	56,046
Commercial mortgage-backed aecurities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	222,656	173,789
Residential mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Residential mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	222,656	173,789
Residential mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value - available for sale	0	0
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	129,662	78,294
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	98,050	54,463
Equity Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	31,612	23,831
Equity Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Exchange Traded Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	98,050	54,463
Exchange Traded Fund [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	98,050	54,463
Exchange Traded Fund [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Exchange Traded Fund [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Nonredeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	31,612	23,831
Nonredeemable Preferred Stock [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Nonredeemable Preferred Stock [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	31,612	23,831
Nonredeemable Preferred Stock [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0

XML

Fair value measurements 2 (Details) - Fair Value, Nonrecurring [Member] - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 0	$ 0
Liabilities measured at fair value on a nonrecurring basis	$ 0	$ 0

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Deferred policy acquisition costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement analysis of deferred policy acquisition costs [Roll Forward]
Balance, beginning of period	$ 23,564	$ 14,801	$ 11,775
Policy acquisition costs deferred:
Direct commissions deferred	80,682	56,841	40,546
Ceding commissions deferred	(18,879)	(12,373)	(11,239)
Other underwriting and policy acquisition costs deferred	4,478	3,727	3,141
Policy acquisition costs deferred	66,281	48,195	32,448
Amortization of net policy acquisition costs	(57,933)	(39,432)	(29,422)
Balance, end of period	$ 31,912	$ 23,564	$ 14,801

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Underwriting, acquisition and insurance expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Underwriting, Acquisition and Insurance Expenses [Abstract]
Direct commissions	$ 69,922	$ 48,382	$ 36,885
Ceding commissions	(16,145)	(12,347)	(10,448)
Other expenses	40,519	34,182	26,988
Total	94,296	70,217	53,425
Salaries, employee benefits and bonus expense	$ 35,900	$ 27,800	$ 19,700

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Income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of income tax expense
Current federal income tax expense	$ 11,378	$ 12,860	$ 9,923
Deferred federal income tax benefit	616	(125)	(3,230)
Income tax expense	11,994	12,735	6,693
Federal income taxes paid	13,000	11,600	$ 9,900
Income taxes receivable	$ 1,200
Income tax payable		$ 400
Statutory income tax rate, percent	21.00%	21.00%	21.00%
Effective income tax rate reconciliation, amount [Abstract]
Income tax expense at federal income tax	$ 21,087	$ 15,971	$ 8,501
Stock options exercised	(7,634)	(2,411)	918
Tax-exempt investment income	(565)	(577)	(672)
Restricted stock award vesting	(658)	(153)	0
Other	(236)	(95)	(218)
Income tax expense	11,994	12,735	$ 6,693
Unrecognized tax positions	$ 0	$ 0

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Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets [Abstract]
Unpaid losses and loss adjustment expenses	$ 11,736	$ 8,199
Unearned premiums	9,942	7,193
Organizational costs	128	162
Stock compensation	865	765
State operating loss carryforwards	3,833	1,497
Allowance for doubtful accounts	649	570
Other	126	256
Deferred tax assets before allowance	27,279	18,642
Less: valuation allowance	(3,491)	(1,592)
Total deferred tax assets	23,788	17,050
Deferred tax liabilities [Abstract]
Unrealized gains on fixed-maturity securities	10,497	3,090
Unrealized gains on equity securities	6,552	2,995
Deferred policy acquisition costs, net of ceding commissions	6,701	4,949
Property and equipment	2,433	10
Intangible assets	743	743
Transition adjustment for loss discounting	1,281	1,537
Other	229	352
Total deferred tax liabilities	28,436	13,676
Net deferred tax liabilities	(4,648)
Net deferred tax assets		3,374
State Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 80,900	$ 31,600

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Reserves for unpaid losses and loss adjustment expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses [Roll Forward]
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	$ 636,013	$ 460,058	$ 369,152	$ 315,717
Reinsurance recoverables on unpaid losses, beginning of period	69,792	55,389	48,224
Adoption of new accounting standard for credit losses, allowance for reinsurance recoverables	282	0	0
Net reserves for unpaid losses and loss adjustment expenses, beginning of period	390,266	313,763	267,493
Incurred losses and loss adjustment expenses [Abstract]
Current year	277,140	178,986	135,078
Prior year losses and loss adjustment expense	(13,338)	(9,423)	(7,037)
Total net losses and loss adjustment expenses incurred	263,802	169,563	128,041
Payments [Abstract]
Current year	27,664	19,054	14,118
Prior years	74,403	74,006	67,653
Total payments	102,067	93,060	81,771
Net reserves for unpaid losses and loss adjustment expenses, end of period	552,283	390,266	313,763
Reinsurance recoverable for unpaid Claims losses, net, ending balance	83,730
Reinsurance recoverables on unpaid losses, end of period		69,792	55,389
Gross reserves for unpaid losses and loss adjustment expenses, end of year	636,013	460,058	$ 369,152
Cumulative Effect, Period of Adoption, Adjusted Balance
Reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses [Roll Forward]
Net reserves for unpaid losses and loss adjustment expenses, beginning of period	$ 390,548
Payments [Abstract]
Net reserves for unpaid losses and loss adjustment expenses, end of period		$ 390,548

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Reserves for unpaid losses and loss adjustment expenses Liability for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	$ (13,338)	$ (9,423)	$ (7,037)
Current year catastrophe losses	277,140	178,986	135,078
Catastrophe [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Current year catastrophe losses	23,200
Accident Year 2019 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	(10,500)
Accident Year 2018 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	$ (1,800)	(13,000)
Accident Year 2017 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense		(1,600)	(6,800)
Accident Year 2016 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense			(3,800)
Accident Years 2011 to 2015 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense		$ 5,200	$ 3,600

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Reserves for unpaid losses and loss adjustment expenses Reserve Development (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)
Claims Development
Prior year losses and loss adjustment expense	$ (13,338,000)	$ (9,423,000)	$ (7,037,000)
Liability for claims and claim adjustment expense, net	504,248,000
Current year	277,140,000	178,986,000	135,078,000
Catastrophe [Member]
Claims Development
Current year	23,200,000
Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	59,955,000
All outstanding liabilities not separately presented, net of reinsurance	0
Liability for claims and claim adjustment expense, net	22,165,000
Incurred claims and claim adjustment expense, net	82,120,000
Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	69,478,000
All outstanding liabilities not separately presented, net of reinsurance	9,000
Liability for claims and claim adjustment expense, net	98,774,000
Incurred claims and claim adjustment expense, net	168,243,000
Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	249,945,000
All outstanding liabilities not separately presented, net of reinsurance	46,000
Liability for claims and claim adjustment expense, net	383,309,000
Incurred claims and claim adjustment expense, net	633,208,000
Accident Year 2011 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	3,104,000	3,104,000	3,065,000	$ 3,042,000	$ 3,042,000	$ 3,044,000	$ 2,116,000	$ 1,392,000	$ 1,037,000	$ 139,000
Incurred claims and claim adjustment expense, net	3,177,000	3,206,000	3,225,000	3,261,000	3,374,000	3,560,000	3,609,000	3,646,000	3,844,000	4,246,000
Total of IBNR liabilities plus expected development on reported claims	$ 73,000
Cumulative number of reported claims	76
Accident Year 2011 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 8,745,000	8,693,000	8,510,000	6,868,000	6,363,000	4,575,000	3,788,000	2,519,000	1,596,000	207,000
Incurred claims and claim adjustment expense, net	9,318,000	9,379,000	9,023,000	8,375,000	8,142,000	7,613,000	7,340,000	5,757,000	5,940,000	$ 5,839,000
Total of IBNR liabilities plus expected development on reported claims	$ 360,000
Cumulative number of reported claims	227
Accident Year 2012 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 1,946,000	1,946,000	1,946,000	1,882,000	1,090,000	1,024,000	877,000	475,000	153,000
Incurred claims and claim adjustment expense, net	2,136,000	2,207,000	2,314,000	2,477,000	2,845,000	3,102,000	4,205,000	5,749,000	7,913,000
Total of IBNR liabilities plus expected development on reported claims	$ 190,000
Cumulative number of reported claims	138
Accident Year 2012 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 21,408,000	20,707,000	19,383,000	16,474,000	14,382,000	11,238,000	7,850,000	4,441,000	757,000
Incurred claims and claim adjustment expense, net	23,197,000	23,223,000	22,401,000	22,001,000	20,579,000	20,401,000	18,803,000	17,436,000	$ 16,977,000
Total of IBNR liabilities plus expected development on reported claims	$ 1,288,000
Cumulative number of reported claims	586
Accident Year 2013 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 5,612,000	5,482,000	5,439,000	5,320,000	5,070,000	4,436,000	1,915,000	499,000
Incurred claims and claim adjustment expense, net	6,087,000	6,128,000	6,463,000	7,002,000	7,917,000	9,113,000	11,639,000	15,238,000
Total of IBNR liabilities plus expected development on reported claims	$ 465,000
Cumulative number of reported claims	228
Accident Year 2013 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 29,610,000	28,248,000	26,715,000	21,348,000	14,890,000	7,957,000	4,469,000	1,099,000
Incurred claims and claim adjustment expense, net	33,128,000	33,973,000	33,248,000	31,731,000	29,039,000	28,037,000	28,771,000	$ 30,616,000
Total of IBNR liabilities plus expected development on reported claims	$ 2,978,000
Cumulative number of reported claims	856
Accident Year 2014 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 9,491,000	9,415,000	8,290,000	6,385,000	5,039,000	1,865,000	435,000
Incurred claims and claim adjustment expense, net	10,620,000	10,988,000	10,948,000	11,217,000	11,748,000	14,289,000	18,847,000
Total of IBNR liabilities plus expected development on reported claims	$ 824,000
Cumulative number of reported claims	273
Accident Year 2014 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 34,338,000	31,026,000	23,771,000	17,576,000	8,489,000	3,081,000	698,000
Incurred claims and claim adjustment expense, net	42,434,000	41,859,000	39,313,000	36,678,000	38,049,000	40,668,000	$ 47,805,000
Total of IBNR liabilities plus expected development on reported claims	$ 5,843,000
Cumulative number of reported claims	1,196
Accident Year 2015 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 11,522,000	11,372,000	9,238,000	7,563,000	4,496,000	217,000
Incurred claims and claim adjustment expense, net	13,548,000	13,942,000	13,583,000	14,896,000	16,777,000	18,883,000
Total of IBNR liabilities plus expected development on reported claims	$ 1,378,000
Cumulative number of reported claims	258
Accident Year 2015 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 41,724,000	37,690,000	28,385,000	12,685,000	3,161,000	941,000
Incurred claims and claim adjustment expense, net	54,090,000	54,697,000	52,100,000	49,122,000	51,739,000	$ 59,717,000
Total of IBNR liabilities plus expected development on reported claims	$ 9,323,000
Cumulative number of reported claims	1,496
Accident Year 2016 [Member]
Claims Development
Prior year losses and loss adjustment expense			(3,800,000)
Accident Year 2016 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 3,270,000	3,265,000	3,265,000	3,257,000	1,867,000
Incurred claims and claim adjustment expense, net	3,270,000	3,278,000	3,301,000	3,392,000	4,177,000
Total of IBNR liabilities plus expected development on reported claims	$ 0
Cumulative number of reported claims	286
Accident Year 2016 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 11,381,000	9,839,000	6,907,000	3,015,000	1,158,000
Incurred claims and claim adjustment expense, net	13,583,000	14,322,000	14,675,000	14,693,000	19,170,000
Total of IBNR liabilities plus expected development on reported claims	$ 2,116,000
Cumulative number of reported claims	310
Accident Year 2016 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 34,437,000	28,924,000	17,225,000	6,015,000	1,099,000
Incurred claims and claim adjustment expense, net	57,401,000	55,534,000	53,549,000	55,680,000	$ 61,440,000
Total of IBNR liabilities plus expected development on reported claims	$ 13,928,000
Cumulative number of reported claims	1,434
Accident Year 2017 [Member]
Claims Development
Prior year losses and loss adjustment expense		(1,600,000)	(6,800,000)
Accident Year 2017 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 11,608,000	11,602,000	11,233,000	9,938,000
Incurred claims and claim adjustment expense, net	11,631,000	11,676,000	11,705,000	12,473,000
Total of IBNR liabilities plus expected development on reported claims	$ 19,000
Cumulative number of reported claims	1,041
Accident Year 2017 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 10,484,000	8,252,000	4,897,000	340,000
Incurred claims and claim adjustment expense, net	15,794,000	16,120,000	17,097,000	18,116,000
Total of IBNR liabilities plus expected development on reported claims	$ 3,703,000
Cumulative number of reported claims	369
Accident Year 2017 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 37,736,000	22,407,000	9,352,000	1,581,000
Incurred claims and claim adjustment expense, net	70,641,000	68,985,000	67,151,000	$ 71,126,000
Total of IBNR liabilities plus expected development on reported claims	$ 24,096,000
Cumulative number of reported claims	1,632
Accident Years 2011 to 2015 [Member]
Claims Development
Prior year losses and loss adjustment expense		5,200,000	3,600,000
Accident Year 2018 [Member]
Claims Development
Prior year losses and loss adjustment expense	$ (1,800,000)	(13,000,000.0)
Accident Year 2018 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	12,599,000	11,646,000	9,132,000
Incurred claims and claim adjustment expense, net	12,698,000	12,004,000	11,559,000
Total of IBNR liabilities plus expected development on reported claims	$ 88,000
Cumulative number of reported claims	649
Accident Year 2018 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 8,931,000	5,030,000	507,000
Incurred claims and claim adjustment expense, net	18,612,000	20,234,000	22,429,000
Total of IBNR liabilities plus expected development on reported claims	$ 7,275,000
Cumulative number of reported claims	458
Accident Year 2018 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 22,860,000	10,995,000	2,638,000
Incurred claims and claim adjustment expense, net	78,386,000	78,331,000	$ 86,157,000
Total of IBNR liabilities plus expected development on reported claims	$ 44,307,000
Cumulative number of reported claims	1,606
Accident Year 2019 [Member]
Claims Development
Prior year losses and loss adjustment expense	$ (10,500,000)
Accident Year 2019 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	12,581,000	9,852,000
Incurred claims and claim adjustment expense, net	13,909,000	14,914,000
Total of IBNR liabilities plus expected development on reported claims	$ 430,000
Cumulative number of reported claims	636
Accident Year 2019 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 6,005,000	2,487,000
Incurred claims and claim adjustment expense, net	29,056,000	34,693,000
Total of IBNR liabilities plus expected development on reported claims	$ 17,500,000
Cumulative number of reported claims	538
Accident Year 2019 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 16,687,000	3,944,000
Incurred claims and claim adjustment expense, net	109,994,000	$ 112,266,000
Total of IBNR liabilities plus expected development on reported claims	$ 81,322,000
Cumulative number of reported claims	1,644
Accident Year 2020 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 19,897,000
Incurred claims and claim adjustment expense, net	40,612,000
Total of IBNR liabilities plus expected development on reported claims	$ 7,139,000
Cumulative number of reported claims	2,189
Accident Year 2020 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 1,002,000
Incurred claims and claim adjustment expense, net	55,630,000
Total of IBNR liabilities plus expected development on reported claims	$ 48,966,000
Cumulative number of reported claims	738
Accident Year 2020 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 2,400,000
Incurred claims and claim adjustment expense, net	154,619,000
Total of IBNR liabilities plus expected development on reported claims	$ 146,945,000
Cumulative number of reported claims	1,076

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Reserves for unpaid losses and loss adjustment expenses Historical Claims Duration (Details)	Dec. 31, 2020 Rate
Property [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	66.90%
Historical Claims Duration, Year Two	23.30%
Historical Claims Duration, Year Three	3.60%
Historical Claims Duration, Year Four	0.00%
Historical Claims Duration, Year Five	0.20%
Casualty - claims made [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	4.90%
Historical Claims Duration, Year Two	21.20%
Historical Claims Duration, Year Three	24.30%
Historical Claims Duration, Year Four	14.40%
Historical Claims Duration, Year Five	13.60%
Historical Claims Duration, Year Six	10.10%
Historical Claims Duration, Year Seven	1.10%
Historical Claims Duration, Year Eight	1.00%
Historical Claims Duration, Year Nine	0.60%
Historical Claims Duration, Year Ten	0.00%
Casualty - occurrence [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	2.50%
Historical Claims Duration, Year Two	10.30%
Historical Claims Duration, Year Three	14.80%
Historical Claims Duration, Year Four	20.20%
Historical Claims Duration, Year Five	13.80%
Historical Claims Duration, Year Six	13.80%
Historical Claims Duration, Year Seven	7.60%
Historical Claims Duration, Year Eight	9.10%
Historical Claims Duration, Year Nine	2.50%
Historical Claims Duration, Year Ten	0.60%

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Reserves for unpaid losses and loss adjustment expenses Reconciliation of Claims Development to Liability (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	$ 504,248
Reinsurance recoverable for unpaid losses	83,730
Unallocated claim adjustment expenses	48,035
Property [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	22,165
Reinsurance recoverable for unpaid losses	10,800
Casualty - claims made [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	98,774
Reinsurance recoverable for unpaid losses	61,100
Casualty - occurrence [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	383,309
Reinsurance recoverable for unpaid losses	$ 11,830

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Reinsurance, Effects of Reinsurance on Premiums Written and Earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Written [Abstract]
Direct	$ 552,814	$ 389,569	$ 275,538
Assumed	0	125	0
Ceded	(74,595)	(47,633)	(39,924)
Net written premiums	478,219	342,061	235,614
Earned [Abstract]
Direct	479,181	330,464	250,397
Assumed	21	104	0
Ceded	(66,448)	(47,587)	(37,709)
Net earned premiums	412,754	282,981	212,688
Ceded incurred losses and loss adjustment expenses	$ 42,000	$ 27,200	$ 25,500

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Reinsurance Reinsurance Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reinsurance Disclosure [Abstract]
Reinsurance recoverables on paid losses, gross	$ 9,485	$ 2,782
Reinsurance recoverable for unpaid losses	83,730
Reinsurance recoverables on unpaid losses, gross		69,792	$ 55,389	$ 48,224
Reinsurance recoverables	93,215	72,574
Concentration Risk [Line Items]
Reinsurance recoverables	93,215	72,574
Ceded unearned premiums	24,265	16,118
Reinsurance Recoverable, Allowance for Credit Loss		$ 300
Credit Risk Reinsurer One [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	26,300
Concentration Risk [Line Items]
Reinsurance recoverables	26,300
Ceded unearned premiums	6,100
Credit Risk Reinsurer Two [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	19,700
Concentration Risk [Line Items]
Reinsurance recoverables	19,700
Ceded unearned premiums	4,000
Credit Risk Reinsurer Three [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	11,900
Concentration Risk [Line Items]
Reinsurance recoverables	11,900
Ceded unearned premiums	2,700
Credit Risk Reinsurer Four [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	8,600
Concentration Risk [Line Items]
Reinsurance recoverables	8,600
Ceded unearned premiums	2,400
Credit Risk Reinsurer Five [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	6,500
Concentration Risk [Line Items]
Reinsurance recoverables	6,500
Ceded unearned premiums	$ 2,300
Prepaid reinsurance premiums ceded to five reinsurers as a percentage of total ceded unearned premium balance [Member] | Major Reinsurers [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	71.80%
Reinsurance recoverables on paid and unpaid losses from the Company’s five largest reinsurers as percent of total reinsurance recoverables [Member] | Major Reinsurers [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	78.40%

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Stockholders' Equity Capital Stock (Details) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares issued	0	0
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01

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Stockholders' Equity, Public Offering (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Aug. 07, 2020	Aug. 12, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Stock issued, shares	310,500	741,750	311,000	742,000
Share price (in dollars per share)	$ 190.00	$ 93.00
Net proceeds from public offering, net of discounts, commissions and other offering costs	$ 56,700	$ 65,900	$ 56,698	$ 65,879	$ 0

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Stockholders' Equity, Equity-based Compensation, Options (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jul. 27, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 3,600	$ 2,700	$ 1,600
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Intrinsic value of options exercised		$ 37,000	$ 11,900
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of option granted	10 years
Award vesting period	4 years
Granted (in dollars per share)	$ 2.71
Assumptions used in estimating fair value of options granted [Abstract]
Risk-free rate of return		1.26%
Dividend yield		1.25%
Expected share price volatility		18.50%
Expected life		6 years 3 months 18 days
Options outstanding, number of awards [Roll Forward]
Options, beginning of the year (in shares)		614,345
Granted, shares		0
Forfeited (in shares)		(234)
Exercised (in shares)		(226,373)
Options, end of year (in shares)		387,738	614,345
Exercisable, shares		387,738
Options outstanding, weighted average exercise price [Abstract]
Options beginning of the year (in dollars per share)		$ 16.00
Granted	$ 16.00	0
Forfeited		16.00
Exercised		16.00
Options end of the year (in dollars per share)		16.00	$ 16.00
Exercisable		$ 16.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term		5 years 7 months 6 days
Exercisable, weighted average remaining contractual term		5 years 7 months 6 days
Outstanding, aggregate intrinsic value		$ 71,394
Exercisable, aggregate intrinsic value		$ 71,394
2016 Omnibus Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance	2,073,832
2016 Omnibus Incentive Plan [Member] | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	1,036,916

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Stockholders' Equity - Equity-based Compensation, Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes	12,000	7,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes	11,966
Vested in period, fair value	$ 5.8	$ 2.1
Nonvested Restricted Stock, Number of Shares [Roll Forward]
Nonvested outstanding at the beginning of the period, shares		122,723
Granted, shares	42,694
Vested, shares	(41,010)
Forfeited, shares	(16,015)
Nonvested outstanding at the end of the period, shares	108,392
Nonvested Restricted Stock, Weighted Average Grant Date Fair Value [Abstract]
Nonvested outstanding at the beginning of the period	$ 67.01
Granted	147.45	$ 80.59	$ 52.99
Vested	63.86
Forfeited	83.79
Nonvested outstanding at the end of the period	$ 97.40	$ 67.01
Unrecognized stock-based compensation expense	$ 8.3
Compensation cost not yet recognized, period	2 years 9 months 18 days
Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	1 year
Maximum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	4 years

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Stockholders' Equity - Subsequent Event (Details) - $ / shares			12 Months Ended
	Feb. 11, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Member] | Dividend Declared [Member]
Subsequent Event [Line Items]
Dividend declared date	Feb. 11, 2021
Dividends payable, per share	$ 0.11
Dividend payable date	Mar. 12, 2021
Dividend record date	Feb. 26, 2021
Restricted Stock [Member]
Subsequent Event [Line Items]
Grant date fair value			$ 147.45	$ 80.59	$ 52.99
Restricted Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Granted		3,200
Grant date fair value		$ 200.13
Award vesting period		1 year

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Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of numerator and denominator of the basic and diluted earnings per share computations [Abstract]
Net income									$ 88,419	$ 63,316	$ 33,787
Basic earnings per share [Abstract]
Earnings per share - basic	$ 1.69	$ 0.66	$ 1.37	$ 0.23	$ 0.81	$ 0.60	$ 0.65	$ 0.88	$ 3.96	$ 2.94	$ 1.60
Diluted earnings per share [Abstract]
Earnings per share - diluted	$ 1.65	$ 0.65	$ 1.33	$ 0.22	$ 0.79	$ 0.58	$ 0.63	$ 0.86	$ 3.87	$ 2.86	$ 1.56
Basic weighted average shares outstanding [Abstract]
Weighted average shares outstanding - basic									22,319,000	21,528,000	21,090,000
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)									533,000	608,000	595,000
Diluted weighted average shares outstanding [Abstract]
Weighted average shares outstanding - diluted (in shares)									22,852,000	22,136,000	21,685,000
Antidilutive securities (in shares)									35,000	54,000	86,000
Stock options [Member]
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)									469,000	570,000	591,000
Restricted Stock [Member]
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)									64,000	38,000	4,000

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Credit Agreement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Current borrowing capacity	$ 50,000
Accordion feature	$ 30,000
Maturity date	May 28, 2024
Interest rate description	Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan.
Credit facility draw down	$ 25,700
Credit facility	42,570	$ 16,744	$ 0
Debt issuance costs	$ 400
Weighted average interest rate	1.98%
Interest expense	$ 1,000
Interest capitalized	800
Interest paid	$ 800	$ 100

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Employee benefit plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Expenses related to employee benefit plan	$ 1.7	$ 1.3	$ 1.0

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Other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains (losses) arising during the period, before income taxes	$ 37,387	$ 19,190	$ (6,664)
Income taxes	(7,851)	(4,029)	1,399
Unrealized gains (losses) arising during the period, net of income tax	29,536	15,161	(5,265)
Less reclassification adjustment [Abstract]
Net realized investment gains	2,119	489	258
Income taxes	(445)	(102)	(54)
Reclassification adjustment included in net income	1,674	387	204
Other comprehensive income (loss)	$ 27,862	$ 14,774	$ (5,469)

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Underwriting information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) Rate	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue from External Customer [Line Items]
Gross written premiums	$ 149,910	$ 144,777	$ 134,091	$ 124,036	$ 112,137	$ 97,984	$ 94,947	$ 84,626	$ 552,814	$ 389,694	$ 275,538
Number of operating segments									1
Construction [Member]
Revenue from External Customer [Line Items]
Gross written premiums									$ 87,206	71,035	50,879
Small Business [Member]
Revenue from External Customer [Line Items]
Gross written premiums									83,289	63,181	44,368
Excess Casualty [Member]
Revenue from External Customer [Line Items]
Gross written premiums									76,715	51,225	37,398
Commercial Property [Member]
Revenue from External Customer [Line Items]
Gross written premiums									51,789	29,115	9,166
Products Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums									38,306	26,333	20,049
Allied Health [Member]
Revenue from External Customer [Line Items]
Gross written premiums									37,562	23,962	16,815
Life Sciences [Member]
Revenue from External Customer [Line Items]
Gross written premiums									31,027	17,821	14,505
General Casualty [Member]
Revenue from External Customer [Line Items]
Gross written premiums									29,205	23,279	17,625
Professional Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums									27,051	20,029	16,717
Management Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums									24,061	14,820	8,161
Energy [Member]
Revenue from External Customer [Line Items]
Gross written premiums									16,985	15,371	15,586
Environmental [Member]
Revenue from External Customer [Line Items]
Gross written premiums									8,568	5,179	2,205
Health Care [Member]
Revenue from External Customer [Line Items]
Gross written premiums									7,666	5,963	5,725
Inland Marine [Member]
Revenue from External Customer [Line Items]
Gross written premiums									6,910	3,467	2,046
Public Entity [Member]
Revenue from External Customer [Line Items]
Gross written premiums									3,007	580	1,193
Commercial Insurance [Member]
Revenue from External Customer [Line Items]
Gross written premiums									1,757	1,674	1,096
Commercial [Member]
Revenue from External Customer [Line Items]
Gross written premiums									531,104	373,034	263,534
Personal Insurance [Member]
Revenue from External Customer [Line Items]
Gross written premiums									$ 21,710	$ 16,660	$ 12,004
Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Number of insurance brokers									3
Major Insurance Brokers, Group One [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums									$ 72,100
Concentration risk, percentage | Rate									13.00%
Major Insurance Brokers, Group Two [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums									$ 63,800
Concentration risk, percentage | Rate									11.50%
Major Insurance Brokers, Group Three [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums									$ 56,500
Concentration risk, percentage | Rate									10.20%

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Statutory financial information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]
Statutory net income	$ 54,338	$ 40,917	$ 34,206
Statutory capital and surplus	$ 476,066	$ 348,811	$ 233,500
Percentage of policyholder surplus as of end of prior year used in determining maximum dividend distribution	10.00%
Maximum dividend distribution that can be paid without prior approval	$ 51,800

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Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Gross written premiums	$ 149,910	$ 144,777	$ 134,091	$ 124,036	$ 112,137	$ 97,984	$ 94,947	$ 84,626	$ 552,814	$ 389,694	$ 275,538
Revenues	139,332	122,501	117,707	80,346	92,804	78,327	72,572	72,185	459,886	315,888	222,114
Net income	38,181	14,890	30,262	5,086	17,853	12,976	13,767	18,720	88,419	63,316	33,787
Comprehensive income	$ 41,704	$ 21,444	$ 57,270	$ (4,137)	$ 16,050	$ 16,218	$ 20,322	$ 25,500	$ 116,281	$ 78,090	$ 28,318
Basic earnings per share [Abstract]
Basic	$ 1.69	$ 0.66	$ 1.37	$ 0.23	$ 0.81	$ 0.60	$ 0.65	$ 0.88	$ 3.96	$ 2.94	$ 1.60
Diluted earnings per share [Abstract]
Diluted	$ 1.65	$ 0.65	$ 1.33	$ 0.22	$ 0.79	$ 0.58	$ 0.63	$ 0.86	$ 3.87	$ 2.86	$ 1.56

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Schedule I-Summary of Investments-Other than Related Parties (Details) $ in Thousands	Dec. 31, 2020 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ 1,130,575
Fair Value	1,211,462
Amount	1,211,462
Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	1,031,817
Fair Value	1,081,800
Amount	1,081,800
US States and Political Subdivisions Debt Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	216,181
Fair Value	230,906
Amount	230,906
Debt Security, Corporate, US [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	294,854
Fair Value	316,608
Amount	316,608
Asset-backed Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	236,813
Fair Value	240,661
Amount	240,661
Commercial mortgage-backed aecurities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	66,110
Fair Value	70,969
Amount	70,969
Residential Mortgage Backed Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	217,859
Fair Value	222,656
Amount	222,656
Equity Securities, Investment Summary [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	98,758
Fair Value	129,662
Amount	129,662
Exchange Traded Funds [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	68,032
Fair Value	98,050
Amount	98,050
Nonredeemable Preferred Stock [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	30,726
Fair Value	31,612
Amount	$ 31,612

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Schedule II - Condensed Financial Information of Registrant, Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 77,093	$ 100,408	$ 75,089	$ 81,747
Deferred income tax asset, net	0	3,374
Income taxes receivable	1,200
Other assets	50,133	23,922
Total assets	1,546,896	1,090,550
Liabilities:
Accounts payable and accrued expenses	13,651	12,366
Income taxes payable		400
Credit facility	42,570	16,744	0
Other liabilities	118	977
Total liabilities	970,658	684,670
Stockholders' Equity [Abstract]
Common stock	228	222
Additional paid-in capital	291,315	229,229
Retained earnings	243,315	162,911
Accumulated other comprehensive income	41,380	13,518
Stockholders' equity	576,238	405,880	263,986	238,189
Total liabilities and stockholders' equity	1,546,896	1,090,550
Parent Company [Member]
Assets
Cash and cash equivalents	8,395	14,726	$ 10,016	$ 1,502
Due from subsidiaries	7,792	16,836
Investment in subsidiaries	600,931	391,071
Deferred income tax asset, net	587	519
Income taxes receivable	1,177	0
Other assets	290	208
Total assets	619,172	423,360
Liabilities:
Accounts payable and accrued expenses	302	260
Income taxes payable	0	434
Credit facility	42,570	16,744
Other liabilities	62	42
Total liabilities	42,934	17,480
Stockholders' Equity [Abstract]
Common stock	228	222
Additional paid-in capital	291,315	229,229
Retained earnings	243,315	162,911
Accumulated other comprehensive income	41,380	13,518
Stockholders' equity	576,238	405,880
Total liabilities and stockholders' equity	$ 619,172	$ 423,360

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Schedule II - Condensed Financial Information of Registrant, Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues	$ 139,332	$ 122,501	$ 117,707	$ 80,346	$ 92,804	$ 78,327	$ 72,572	$ 72,185	$ 459,886	$ 315,888	$ 222,114
Expenses [Abstract]
Other expenses									1,375	57	168
Total expenses									359,473	239,837	181,634
Income tax benefit									11,994	12,735	6,693
Net income	38,181	14,890	30,262	5,086	17,853	12,976	13,767	18,720	88,419	63,316	33,787
Other Comprehensive Income (Loss) [Abstract]
Comprehensive income	$ 41,704	$ 21,444	$ 57,270	$ (4,137)	$ 16,050	$ 16,218	$ 20,322	$ 25,500	116,281	78,090	28,318
Parent Company [Member]
Revenues:
Revenues									5,709	4,502	3,215
Expenses [Abstract]
Other operating expenses									6,624	5,215	4,055
Other expenses									1,332	0	0
Total expenses									7,956	5,215	4,055
Loss before equity in net income of subsidiaries									(2,247)	(713)	(840)
Income tax benefit									(8,779)	(2,714)	(1,158)
Income before equity in net income of subsidiaries									6,532	2,001	318
Equity in net income of subsidiaries									81,887	61,315	33,469
Net income									88,419	63,316	33,787
Other Comprehensive Income (Loss) [Abstract]
Equity in other comprehensive earnings (losses) of subsidiaries									27,862	14,774	(5,469)
Comprehensive income									$ 116,281	$ 78,090	$ 28,318

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Schedule II - Condensed Financial Information of Registrant, Statements of Cash Flows (Details) - USD ($) $ in Thousands			3 Months Ended								12 Months Ended
	Aug. 07, 2020	Aug. 12, 2019	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income			$ 38,181	$ 14,890	$ 30,262	$ 5,086	$ 17,853	$ 12,976	$ 13,767	$ 18,720	$ 88,419	$ 63,316	$ 33,787
Adjustments to reconcile net income to net cash used in operating activities:
Deferred tax (benefit) expense											616	(125)	(3,230)
Stock compensation expense											3,575	2,742	1,597
Dividends received from subsidiary											0	5,000	11,500
Net cash provided by operating activities											279,974	178,357	103,980
Net Cash Provided by (Used in) Investing Activities [Abstract]
Net cash provided by (used in) investing activities											(379,433)	(230,793)	(106,540)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	$ 56,700	$ 65,900									56,698	65,879	0
Common stock issued, stock options exercised											3,622	2,750	1,808
Payroll taxes withheld and remitted on share-based payments											(1,803)	(617)	0
Dividends paid											(8,073)	(6,929)	(5,906)
Proceeds from credit facility											25,700	17,300	0
Debt issuance costs											0	(628)	0
Net cash provided by (used in) financing activities											76,144	77,755	(4,098)
Net change in cash and cash equivalents											(23,315)	25,319	(6,658)
Cash and cash equivalents at beginning of period						100,408				75,089	100,408	75,089	81,747
Cash and cash equivalents at end of period			77,093				100,408				77,093	100,408	75,089
Parent Company [Member]
Operating activities:
Net income											88,419	63,316	33,787
Adjustments to reconcile net income to net cash used in operating activities:
Deferred tax (benefit) expense											(68)	(150)	(170)
Stock compensation expense											3,575	2,742	1,597
Equity in undistributed earnings of subsidiaries											(81,887)	(61,315)	(33,469)
Changes in operating assets and liabilities											7,520	(14,247)	(633)
Dividends received from subsidiary											0	5,000	11,500
Net cash provided by operating activities											17,559	(4,654)	12,612
Net Cash Provided by (Used in) Investing Activities [Abstract]
Contribution to subsidiary											(100,034)	68,391	0
Net cash provided by (used in) investing activities											(100,034)	(68,391)	0
Financing activities:
Proceeds from issuance of common stock, net of issuance costs											56,698	65,879	0
Common stock issued, stock options exercised											3,622	2,750	1,808
Payroll taxes withheld and remitted on share-based payments											(1,803)	(617)	0
Dividends paid											(8,073)	(6,929)	(5,906)
Proceeds from credit facility											25,700	17,300	0
Debt issuance costs											0	(628)	0
Net cash provided by (used in) financing activities											76,144	77,755	(4,098)
Net change in cash and cash equivalents											(6,331)	4,710	8,514
Cash and cash equivalents at beginning of period						$ 14,726				$ 10,016	14,726	10,016	1,502
Cash and cash equivalents at end of period			$ 8,395				$ 14,726				$ 8,395	$ 14,726	$ 10,016

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Schedule II - Condensed Financial Information of Registrant, Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Current borrowing capacity	$ 50,000
Accordion feature	$ 30,000
Maturity date	May 28, 2024
Interest rate description	Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan.
Credit facility	$ 42,570	$ 16,744	$ 0
Debt issuance costs	$ 400
Weighted average interest rate	1.98%
Interest expense	$ 1,000
Interest capitalized	800
Interest paid	800	100
Cash dividends paid to parent company by consolidated subsidiaries	$ 0	$ 5,000	$ 11,500

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Schedule V - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss		$ 300
Accounting Standards Update 2016-13 [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Adoption of ASU 2016-13	$ 400
Allowance for Premiums Receivable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	2,705	2,615	$ 2,112
Balance at beginning of period, net of adoption of new accounting standard for credit losses				$ 2,345
Additions amounts charged to expense	1,240	835	663
Deductions amounts written off or disposals	(498)	(745)	(160)
Balance at end of period	3,087	2,705	2,615
Valuation Allowance for Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,592	780	690
Additions amounts charged to expense	1,899	812	90
Deductions amounts written off or disposals	0	0	0
Balance at end of period	3,491	1,592	$ 780
Allowance for Reinsurance Recoverable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	282
Additions amounts charged to expense	0
Deductions amounts written off or disposals	0
Balance at end of period	$ 282	$ 282