10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended: March 31, 2021

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: 1-13429

Simpson Manufacturing Co., Inc.

(Exact name of registrant as specified in its charter) 

Delaware	94-3196943
(State or other jurisdiction of incorporation	(I.R.S. Employer
or organization)	Identification No.)

5956 W. Las Positas Blvd., Pleasanton, CA 94588

(Address of principal executive offices, including zip code) 

(925) 560-9000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of Each Class	Trading Symbol	Name of Each Exchange on Which Registered
Common Stock, par value $0.01 per share	SSD	New York Stock Exchange

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 ý  No o

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 ý  No o

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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. 

Large accelerated filer	ý	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. o 

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

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

The number of shares of the registrant’s common stock outstanding as of May 3, 2021:43,430,766  

Simpson Manufacturing Co., Inc. and Subsidiaries

TABLE OF CONTENTS

Part I - Financial Information

Item 1 - Financial Statements
		Page No.
	Condensed Consolidated Balance Sheets (unaudited) as of March 31, 2021, 2020 and December 31, 2020	4
	Condensed Consolidated Statements of Earnings and Comprehensive Income (unaudited) for the Three Months Ended March 31, 2021 and 2020	5
	Condensed Consolidated Statements of Stockholders' Equity (unaudited) for the Three Months ended March 31, 2021 and 2020	6
	Condensed Consolidated Statements of Cash Flows (unaudited) for the Three Months Ended March 31, 2021 and 2020	7
	Notes to Condensed Consolidated Financial Statements	8
Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations		21
Item 3 - Quantitative and Qualitative Disclosures about Market Risk		29
Item 4 - Controls and Procedures		30
Part II - Other Information
Item 1 - Legal Proceedings		30
Item 1A - Risk Factors		31
Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds		31
Item 3 - Defaults Upon Senior Securities		32
Item 4 - Mine Safety Disclosures		32
Item 5 - Other Information		32
Item 6 - Exhibits		33

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements.

Simpson Manufacturing Co., Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

(In thousands, unaudited)

	March 31,				December 31,
	2021		2020		2020
ASSETS
Current assets
Cash and cash equivalents	$	257,428	$	301,741	$	274,639
Trade accounts receivable, net	227,201		168,736		165,128
Inventories	296,640		255,720		283,742
Other current assets	37,732		25,786		29,630
Total current assets	819,001		751,983		753,139
Property, plant and equipment, net	255,684		246,941		255,184
Operating lease right-of-use assets	44,236		33,725		45,792
Goodwill	133,477		131,599		135,844
Intangible assets, net	25,059		23,454		26,800
Other noncurrent assets	17,270		10,546		15,810
Total assets	$	1,294,727	$	1,198,248	$	1,232,569
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Trade accounts payable	$	66,236	$	44,505	$	48,271
Accrued liabilities and other current liabilities	158,578		118,346		145,790
Total current liabilities	224,814		162,851		194,061
Operating lease liabilities	35,810		26,084		37,199
Long term debt, net of current portion	—		150,000		—
Deferred income tax and other long-term liabilities	19,594		17,719		20,366
Total liabilities	280,218		356,654		251,626
Commitments and contingencies (see Note 13)
Stockholders’ equity
Common stock, at par value	435		444		433
Additional paid-in capital	285,896		272,872		284,007
Retained earnings	760,862		672,485		720,441
Treasury stock	(13,510)		(72,058)		(13,510)
Accumulated other comprehensive loss	(19,174)		(32,149)		(10,428)
Total stockholders’ equity	1,014,509		841,594		980,943
Total liabilities and stockholders’ equity	$	1,294,727	$	1,198,248	$	1,232,569

The accompanying notes are an integral part of these condensed consolidated financial statements

4

Simpson Manufacturing Co., Inc. and Subsidiaries

Condensed Consolidated Statements of Earnings and Comprehensive Income

(In thousands except per-share amounts, unaudited)

	Three Months Ended
	March 31,
	2021		2020
Net sales	$	347,642	$	283,668
Cost of sales	185,360		154,002
Gross profit	162,282		129,666
Operating expenses:
Research and development and other engineering	14,591		13,382
Selling	30,823		28,527
General and administrative	48,565		38,471
Total operating expenses	93,979		80,380
Net gain on disposal of assets	(80)		(64)
Income from operations	68,383		49,350
Interest expense, net and other	(1,778)		(2,533)
Income before taxes	66,605		46,817
Provision for income taxes	16,218		9,991
Net income	$	50,387	$	36,826
Other comprehensive income
Translation adjustment	(9,264)		(7,593)
Unamortized pension adjustments	492		273
Unrealized gains on derivative instruments	26		—
Comprehensive net income	$	41,641	$	29,506
Net income per common share:
Basic	$	1.16	$	0.84
Diluted	$	1.16	$	0.83
Number of shares outstanding
Basic	43,379		44,099
Diluted	43,612		44,286
Cash dividends declared per common share	$	0.23	$	0.23

The accompanying notes are an integral part of these condensed consolidated financial statements

5

Simpson Manufacturing Co., Inc. and Subsidiaries

Condensed Consolidated Statements of Stockholders’ Equity

(In thousands except per-share data)

Three Months Ended March 31, 2021 and 2020 (unaudited)

	Common Stock			Additional Paid-in		Retained		Accumulated Other Comprehensive		Treasury
	Shares	Par Value		Capital		Earnings		Income (Loss)		Stock		Total
Balance at December 31, 2020	43,326	$	433	$	284,007	$	720,441	$	(10,428)	$	(13,510)	$	980,943
Net income	—	—		—		50,387		—		—		50,387
Translation adjustment, net of tax	—	—		—		—		(9,264)		—		(9,264)
Pension adjustment and other, net of tax	—	—		—		—		492		—		492
Unrealized gains on derivative instruments								26				26
Stock-based compensation	—	—		6,462		—		—		—		6,462
Shares issued from release of Restricted Stock Units	97	1		(5,264)		—		—		—		(5,263)
Cash dividends declared on common stock, $0.23 per share	—	—		—		(9,966)		—		—		(9,966)
Common stock issued at $93.45 per share for stock bonus	7	1		691		—		—		—		692
Balance at March 31, 2021	43,430	$	435	$	285,896	$	760,862	$	(19,174)	$	(13,510)	$	1,014,509
Balance at December 31, 2019	44,209	$	442	$	280,216	$	645,507	$	(24,829)	$	(9,379)	$	891,957
Net income	—	—		—		36,826		—		—		36,826
Translation adjustment and other, net of tax	—	—		—		—		(7,593)		—		(7,593)
Pension adjustment, net of tax	—	—		—		—		273		—		273
Stock-based compensation	—	—		33		—		—		—		33
Shares issued from release of Restricted Stock Units	153	2		(7,699)		—		—		—		(7,697)
Repurchase of common stock	(902)	—		—		—		—		(62,679)		(62,679)
Cash dividends declared on common stock, $0.23 per share	—	—		—		(9,848)		—		—		(9,848)
Common stock issued at $80.38 per share for stock bonus	4	—		322		—		—		—		322
Balance, at March 31, 2020	43,464	$	444	$	272,872	$	672,485	$	(32,149)	$	(72,058)	$	841,594

The accompanying notes are an integral part of these condensed consolidated financial statements

6

Simpson Manufacturing Co., Inc. and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(In thousands, unaudited)

	Three Months Ended
	March 31,
	2021		2020
Cash flows from operating activities
Net income	$	50,387	$	36,826
Adjustments to reconcile net income to net cash provided by operating activities:
Loss/(gain) on sale of assets and other	333		(58)
Depreciation and amortization	11,225		9,734
Noncash lease expense	2,393		1,997
Deferred income taxes	314		1,430
Noncash compensation related to stock plans	6,542		277
Provision of doubtful accounts	(215)		721
Changes in operating assets and liabilities:
Trade accounts receivable	(62,660)		(32,161)
Inventories	(14,750)		(5,962)
Trade accounts payable	17,301		11,018
Other current assets	(14,109)		(6,821)
Accrued liabilities and other current liabilities	22,126		(4,927)
Other noncurrent assets and liabilities	(1,054)		651
Net cash provided by operating activities	17,833		12,725
Cash flows from investing activities
Capital expenditures	(10,505)		(6,795)
Invest in equity investments	(5,329)		—
Proceeds from sale of property and equipment	105		561
Net cash used in investing activities	(15,729)		(6,234)
Cash flows from financing activities
Repurchase of common stock	—		(62,679)
Proceeds from lines of credit	—		154,529
Repayments of lines of credit and capital leases	(192)		(5,415)
Dividends paid	(9,967)		(10,169)
Cash paid on behalf of employees for shares withheld	(5,263)		(7,699)
Net cash used by in financing activities	(15,422)		68,567
Effect of exchange rate changes on cash and cash equivalents	(3,893)		(3,527)
Net (decrease) increase in cash and cash equivalents	(17,211)		71,531
Cash and cash equivalents at beginning of period	274,639		230,210
Cash and cash equivalents at end of period	$	257,428	$	301,741
Noncash activity during the period
Noncash capital expenditures	$	1,526	$	289
Dividends declared but not paid	9,967		10,204
Issuance of Company’s common stock for compensation	692		322

The accompanying notes are an integral part of these condensed consolidated financial statements

7

Notes to Condensed Consolidated Financial Statements

(Unaudited)

1.    Basis of Presentation

Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of Simpson Manufacturing Co., Inc. and its subsidiaries (collectively, the “Company”). Investments in 50% or less owned entities are accounted for using either cost or the equity method. All significant intercompany transactions have been eliminated.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("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. Management believes that these consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation under GAAP. We assessed certain accounting matters that require the use of estimates and assumptions in context with the known and projected future impacts of COVID-19. The Company's actual results could differ materially from those estimates.

Interim Reporting Period

The accompanying unaudited quarterly condensed consolidated financial statements have been prepared pursuant to the rules and regulations for reporting on Form 10-Q. Accordingly, certain information and footnotes required by GAAP have been condensed or omitted. These interim statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (the “2020 Form 10-K”).

The unaudited quarterly condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, contain all adjustments (consisting of only normal recurring adjustments) necessary to state fairly the financial information set forth therein in accordance with GAAP. Certain prior period amounts in the condensed consolidated financial statements and the accompanying notes have been reclassified to conform to the current period’s presentation. The year-end condensed consolidated balance sheet data provided herein were derived from audited financial statements included in the 2020 Form 10-K, but do not include all disclosures required by GAAP. The Company’s quarterly results fluctuate. As a result, the Company believes the results of operations for this interim period presented are not indicative of the results to be expected for any future periods.

Revenue Recognition

Generally, the Company’s revenue contract with a customer exists when goods are shipped, and services (if any) are rendered; and its related invoice is generated. The duration of the contract does not extend beyond the promised goods or services already transferred. The transaction price of each distinct promised product or service specified in the invoice is based on its relative stated standalone selling price. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product to a customer at a point in time. The Company’s shipping terms provide the primary indicator of the transfer of control. The Company’s general shipping terms are F.O.B. shipping point, where title and risk and rewards of ownership transfer at the point when the products leave the Company’s warehouse. The Company recognizes revenue based on the consideration specified in the invoice with a customer, excluding any sales incentives, discounts, and amounts collected on behalf of third parties (i.e., governmental tax authorities). Based on historical experience with the customer, the customer's purchasing pattern and its significant experience selling products, the Company concluded that a significant reversal in the cumulative amount of revenue recognized will not occur when the uncertainty (if any) is resolved (that is, when the total amount of purchases is known). Refer to Note 2 for additional information.

8

Net Income Per Common Share

The Company calculates net income per common share based on the weighted-average number of shares of the Company's common stock outstanding during the period. Potentially dilutive securities are included in the diluted per-share calculations using the treasury stock method for all periods when the effect is dilutive.

Accounting for Leases

The Company has operating and finance leases for certain facilities, equipment, autos and data centers. As an accounting policy for short-term leases, the Company elected to not recognize the right-of-use asset and liability, if, at the commencement date, the lease (1) has a term of 12 months or less and (2) does not include renewal and purchase options that the Company is reasonably certain to exercise. Monthly payments on short-term leases are recognized on the straight-line basis over the full lease term.

Accounting for Stock-Based Compensation

The Company recognizes stock-based compensation expense related to the estimated fair value of restricted stock awards on a straight-line basis, net of estimated forfeitures, over the requisite service period of the awards, which is generally the vesting term of four years. Stock-based expense related to performance share grants are measured based on grant date fair value and expensed on a graded basis over the service period of the awards, which is generally a performance period of three years. The performance conditions are based on the Company's achievement of revenue growth and return on invested capital over the performance period, and are evaluated for the probability of vesting at each reporting period end with changes in expected results recognized as an adjustment to expense. The assumptions used to calculate the fair value of restricted stock grants are evaluated and revised, as necessary, to reflect market conditions and the Company’s experience.

Fair Value of Financial Instruments

Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified under a three-tier fair valuation hierarchy based on the observability of the inputs available in the market: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and Level 3 inputs are unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The carrying amounts of trade accounts receivable, accounts payable, accrued liabilities and other current liabilities approximate fair value due to the short-term nature of these instruments. The fair value of the Company’s contingent consideration related to acquisitions and equity investment are classified as Level 3 within the fair value hierarchy as it is based on unobserved inputs such as management estimates and entity-specific assumptions and is evaluated on an ongoing basis. The fair value of foreign currency forward contracts, calculated based on Level 1 inputs, was not material as of March 31, 2021.

Derivative Instruments - Foreign Currency Contracts

The Company uses derivative instruments as a risk management tool to mitigate the potential impact of certain market risks. Foreign currency exchange rate risk is the primary market risk the Company manages through the use of derivative instruments, which are accounted for as cash flow hedges under the accounting standards and carried at fair value as other current assets or other current liabilities in the consolidated balance sheets. Net deferred gains and losses related to changes in fair value are included in accumulated other comprehensive loss, a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. Changes in fair value of any derivatives that are determined to be ineffective are immediately reclassified from other comprehensive income into earnings. The cash flow impact of the Company's derivative instruments is primarily included in the consolidated statement of cash flows in net cash provided by operating activities. Refer to Note 8.

9

Cash and Cash Equivalents

The Company classifies investments that are highly liquid and have maturities of three months or less at the date of purchase as cash equivalents. As of March 31, 2021 and 2020, the value of these investments were $28.2 million and $0.1 million, respectively, consisting of U.S. Treasury securities and money market funds. The value of the investments is based on cost, which approximates fair value based on Level 1 inputs.

Current Estimated Credit Loss - Allowance for doubtful accounts

The Company maintains an allowance for doubtful accounts receivable for estimated future expected credit losses resulting from customers' failure to make payments on its accounts receivable. The Company determines the estimate of the allowance for doubtful accounts receivable by considering several factors, including (1) specific information on the financial condition and the current creditworthiness of customers, (2) credit rating, (3) payment history and historical experience, (4) aging of the accounts receivable, and (5) reasonable and supportable forecasts about collectability. The Company also reserves 100% of the amounts deemed uncollectible due to a customer's deteriorating financial condition or bankruptcy.

Every quarter, the Company evaluates the customer group using the accounts receivable aging report and its best judgment when considering changes in customers' credit ratings, level of delinquency, customers' historical payments and loss experience, current market and economic conditions, and expectations of future market and economic conditions.

The changes in the allowance for doubtful accounts receivable for the year ended March 31, 2021 are outlined in the table below:

	Balance at		Amounts		Balance at
(in thousands)	December 31, 2020		Charged to Expense	Write-Offs1	March 31, 2021
Allowance for Doubtful Accounts	$	2,110	(215)	119	$	1,776

1Amount is net of recoveries and the effect of foreign currency fluctuations for the year ended March 31, 2021.

Income Taxes

The Company uses an estimated annual tax rate to measure the tax benefit or tax expense recognized in each interim period.

Accounting Standards Not Yet Adopted

In March 2020, the FASB issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848). ASU 2020-04 provides optional guidance to ease the potential burden in accounting for reference rate reform on financial reporting in response to the risk of cessation of the London Interbank Offered Rate (“LIBOR”) on December 31, 2021. The ASU allows the option to account for and present a modification that meets the scope of the standard as an event that does not require contract remeasurement at the modification date or reassessment of a previous accounting determination required under the relevant topic or subtopic. Generally, the ASU allows hedge accounting to continue if the hedge was highly effective or met other standards prior to reference rate reform. Entities are permitted to apply the amendments to all contracts, cash flow and net investment hedge relationships that exist as of March 12, 2020. The relief provided in this ASU is only available for a limited time, generally through December 31, 2022. The Company's Credit Facility maturing on July 23, 2022 bears interest using LIBOR plus an applicable margin. We do not expect a material impact to our consolidated operating results, financial position or cash flows from the transition from LIBOR to alternative reference interest rates, but we will continue to monitor the impact of this transition until it is completed.

All issued and effective accounting standards during the first quarter of 2021 were determined to be not relevant or material to the Company.

10

2.    Revenue from Contracts with Customers

Disaggregated revenue

The Company disaggregates net sales into the following major product groups as described in the footnote for segment information included in these interim financial statements under Note 14.

Wood Construction Products Revenue. Wood construction products represented 87% and 86% of total net sales in the three months ended March 31, 2021 and 2020, respectively.

Concrete Construction Products Revenue. Concrete construction products represented 13% and 14% of total net sales in the three months ended March 31, 2021 and 2020, respectively.

Customer acceptance criteria. Generally, there are no customer acceptance criteria included in the Company's standard sales agreement with customers. When an arrangement with the customer does not meet the criteria to be accounted for as a revenue contract under the standard, the Company recognizes revenue in the amount of nonrefundable consideration received when the Company has transferred control of the goods or services and has stopped transferring (and has no obligation to transfer) additional goods or services. The Company offers certain customers discounts for paying invoices ahead of the due date, which are generally between 30 to 60 days after the issue date.

Other revenue. Service sales, representing after-market repair and maintenance, engineering activities and software license sales and services were less than 1.0% of net sales and recognized as the services are completed or by transferring control over a product to a customer at a point in time. Services may be sold separately or in bundled packages. The typical contract length for a service is generally less than one year. For bundled packages, the Company accounts for individual services separately when they are distinct within the context of the contract. A distinct service is separately identifiable from other items in the bundled package if a customer can benefit from the service on its own or with other resources that are readily available to the customer. The consideration (including any discounts) is allocated between separate services in a bundle based on their relative stand-alone selling prices. The stand-alone selling prices are determined based on the prices at which the Company separately sells the services.

Reconciliation of contract balances

Contract assets are the rights to consideration in exchange for goods or services that the Company has transferred to a customer when that right is conditional on something other than the passage of time. Contract liabilities are recorded for any services billed to customers and not yet recognizable if the contract period has commenced or for the amount collected from customers in advance of the contract period commencing. As of March 31, 2021, the Company had no contract assets or contract liabilities from contracts with customers.

11

3.    Net Income Per Share

The following table reconciles basic net income per share of the Company's common stock to diluted net income per share for the three months ended March 31, 2021 and 2020, respectively:

	Three Months Ended    March 31,
(in thousands, except per share amounts)	2021		2020
Net income available to common stockholders	$	50,387	$	36,826
Basic weighted-average shares outstanding	43,379		44,099
Dilutive effect of potential common stock equivalents — restricted stock units	233		187
Diluted weighted-average shares outstanding	43,612		44,286
Net income per common share:
Basic	$	1.16	$	0.84
Diluted	$	1.16	$	0.83

4.    Stockholders' Equity

Treasury Shares

As of March 31, 2021, the Company held 150,974 shares of its common stock as treasury shares.

5.    Stock-Based Compensation

The Company allocates stock-based compensation expense related to equity plans for employees and non-employee directors among the cost of sales, research and development and other engineering expense, selling expense, or general and administrative expense based on the job functions performed by the employees to whom the stock-based compensation is awarded. The Company recognized stock-based compensation expense related to its equity plans for employees of $6.5 million and $0.3 million for the three months ended March 31, 2021 and 2020, respectively. The $6.2 million increase in stock-based compensation expense was due to the reevaluation of the expected performance conditions and updated expected vesting during the first quarter of 2021 compared to the first quarter of 2020.

During the three months ended March 31, 2021, the Company granted 133,424 restricted stock units ("RSUs") to the Company's employees, including officers at an estimated weighted average fair value of $100.26 per share based on the closing price (adjusted for the present value of dividends) of the Company's common stock on the grant date. The RSUs granted to the Company's employees may be performance-based and/or time-based. Certain performance-based RSUs are granted to officers and key employees, where the number of performance-based awards to be issued is based on the achievement of certain Company performance criteria established in the RSU agreement over a cumulative three-year period. These awards cliff vest after three years. In addition, these same officers and key employees also receive time-based RSUs, which vest pursuant to a three-year graded vesting schedule. Time-based RSUs that are granted to the Company's employees excluding officers and certain key employees, vest ratably over the four year vesting-term of the award.

As of March 31, 2021, the Company's aggregate unamortized stock compensation expense was approximately $24.0 million, is expected to be recognized in expense over a weighted-average period of 2.6 years.

12

6.    Trade Accounts Receivable, Net

Trade accounts receivable at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Trade accounts receivable	$	232,646	$	174,853	$	170,001
Allowance for doubtful accounts	(1,776)		(2,761)		(2,110)
Allowance for sales discounts and returns	(3,669)		(3,356)		(2,763)
	$	227,201	$	168,736	$	165,128

7.    Inventories

Inventories at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Raw materials	$	94,340	$	89,903	$	95,777
In-process products	22,678		19,464		21,803
Finished products	179,622		146,353		166,162
	$	296,640	$	255,720	$	283,742

8. Derivative Instruments

The Company transacts business in various foreign countries and may therefore be exposed to foreign currency exchange rate risk. The Company has established risk management programs to protect against volatility in the value of non-functional future cash flows caused by changes in foreign currency exchange rates and tries to maintain a partial or fully hedged position for certain transaction exposures when management considers appropriate. The Company enters into short-term foreign currency derivatives contracts, namely forward contracts, to hedge only those currency exposures associated with cash flows denominated in non-functional currencies. Gains and losses on the Company's derivative contracts are designed to offset losses and gains on the transactions hedged, and accordingly, generally do not subject the Company to risk of significant accounting losses. The Company hedges committed exposures and does not engage in speculative transactions. The credit risk of these derivative contracts is minimized since the contracts are with a large financial institution and accordingly, fair value adjustments related to the credit risk of the counterparty financial institution are not material.

The Company sources certain materials for its concrete products from a wholly owned subsidiary in China, and as a result is exposed to variability in cash outflows associated with changes in the foreign exchange rate between the U.S. Dollar and the Chinese Yuan (CNY). As of March 31, 2021, the aggregate notional amount of the Company's outstanding foreign currency derivative contracts was to buy CNY62.2 million by selling $9.1 million throughout fiscal 2021. These forward contracts are accounted for as cash flow hedges under the accounting standards, and fair value is included in other current assets or other current liabilities, as applicable, in the consolidated balance sheet was $0.4 million.

Net deferred gains and losses on these contracts relating to changes in fair value are included in accumulated other comprehensive loss ("OCI"), a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. There were no amounts recognized for gains or losses on these contracts during the quarter ended March 31, 2021. Changes in fair value of any forward contracts that are determined to be ineffective are immediately reclassified from OCI into earnings. The amounts deferred in OCI are expected to be recognized as a component of cost of sales in the consolidated statement of operations from 2021 to 2022. There were no amounts recognized due to ineffectiveness during the quarter ended March 31, 2021.

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9.    Property, Plant and Equipment, Net

Property, plant and equipment, net, at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Land	$	28,280	$	27,964	$	28,553
Buildings and site improvements	201,283		193,971		203,421
Leasehold improvements	7,023		4,832		7,091
Machinery, equipment, and software	385,195		354,931		372,923
	621,781		581,698		611,988
Less accumulated depreciation and amortization	(382,907)		(351,776)		(377,460)
	238,874		229,922		234,528
Capital projects in progress	16,810		17,019		20,656
	$	255,684	$	246,941	$	255,184

10.    Goodwill and Intangible Assets, Net

Goodwill at the dates indicated was as follows: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
North America	$	96,340	$	95,988	$	96,311
Europe	35,684		34,445		38,059
Asia/Pacific	1,453		1,166		1,474
Total	$	133,477	$	131,599	$	135,844

Intangible assets, net, at the dates indicated were as follows: 

	At March 31, 2021
	Gross				Net
	Carrying		Accumulated		Carrying
(in thousands)	Amount		Amortization		Amount
North America	$	40,785	$	(23,724)	$	17,061
Europe	26,347		(18,349)		7,998
Total	$	67,132	$	(42,073)	$	25,059

	At March 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	33,755	$	(20,039)	$	13,716
Europe	25,410		(15,672)		9,738
Total	$	59,165	$	(35,711)	$	23,454

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	At December 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	40,786	$	(22,697)	$	18,089
Europe	26,341		(17,630)		8,711
Total	$	67,127	$	(40,327)	$	26,800

Intangible assets consist of definite-lived and indefinite-lived assets. Definite-lived intangible assets include customer relationships, patents, unpatented technology, and non-compete agreements. Amortization expense of definite-lived intangible assets was $1.7 million and $1.5 million for the three months ended March 31, 2021 and 2020, respectively. The weighted-average amortization period for all amortizable intangibles on a combined basis is 6.3 years.

The only indefinite-lived intangible asset, consisting of a trade name, totaled $0.6 million at March 31, 2021.

At March 31, 2021, the estimated future amortization of definite-lived intangible assets was as follows: 

(in thousands)
Remaining nine months of 2021	$	4,619
2022	4,223
2023	3,390
2024	2,343
2025	2,086
2026	1,483
Thereafter	6,300
	$	24,444

The changes in the carrying amount of goodwill and intangible assets for the three months ended March 31, 2021, were as follows: 

			Intangible
(in thousands)	Goodwill		Assets
Balance at December 31, 2020	$	135,844	$	26,800
Reclassifications	(106)		348
Amortization	—		(1,746)
Foreign exchange	(2,261)		(343)
Balance at March 31, 2021	$	133,477	$	25,059

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11.    Leases

Operating Lease and Finance Obligations

The Company has operating leases for certain facilities, equipment and autos. The existing operating leases expire at various dates through 2025, some of which include options to extend the leases for up to 5 years. The Company measured the lease liability at the present value of the lease payments to be made over the lease term. The lease payments are discounted using the Company's incremental borrowing rate. The Company measured the right-of-use assets ("ROU") assets at the amount at which the lease liability is recognized plus initial direct costs incurred or prepayment amounts. The ROU assets are amortized on a straight-line basis over the lease term.

Finance Lease Obligations

The Company has finance leases for data centers and certain office equipment, which was recorded in fixed assets as capital lease obligations. These finance lease obligations are included in current liabilities and other long-term liabilities in the accompanying consolidated balance sheets. The interest rates for these two capital leases are 2.89% and 3.50%, respectively, and the two leases will mature in May 2021 and July 2021, respectively.

The following table provides a summary of leases included on the condensed consolidated balance sheets March 31, 2021, 2020 and December 31, 2020, condensed consolidated statements of earnings, and condensed consolidated statements of cash flows as of the three months and three months ended March 31, 2021 and 2020:

	Condensed Consolidated Balance Sheets Line Item	March 31,				December 31,
(in thousands)		2021		2020		2020
Operating leases
Assets
Operating leases	Operating lease right-of-use assets	$	44,236	$	33,725	$	45,792
Liabilities
Operating - current	Accrued expenses and other current liabilities	$	8,941	$	7,603	$	9,143
Operating - noncurrent	Operating lease liabilities	35,810		26,084		37,199
Total operating lease liabilities		$	44,751	$	33,687	$	46,342
Finance leases
Assets
Property and equipment, gross	Property, plant and equipment, net	$	3,569	$	3,566	$	3,569
Accumulated amortization	Property, plant and equipment, net	(3,188)		(2,903)		(3,112)
Property and equipment, net	Property, plant and equipment, net	$	381	$	663	$	457
Liabilities
Other current liabilities	Accrued expenses and other current liabilities	$	193	$	1,125	$	384
Other long-term liabilities	Deferred income tax and other long-term liabilities	—		6		—
Total finance lease liabilities		$	193	$	1,131	$	384

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The components of lease expense were as follows:

	Condensed Consolidated Statements of Operations Line Item	Three Months Ended March 31,
(in thousands)		2021		2020
Operating lease cost	General administrative expenses and      cost of sales	$	2,859	$	2,492
Finance lease cost:
Amortization of right-of-use         assets	General administrative expenses	$	216	$	218
Interest on lease liabilities	Interest expense, net	2		11
Total finance lease		$	218	$	229

Other information

Supplemental cash flow information related to leases as follows:

	Three Months Ended March 31,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	2,805	$	2,418
Finance cash flows for finance leases	290		290
Operating right-of-use assets obtained in exchange for lease      obligations during the current period	786		2,068

The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2021:

(in thousands)	Finance Leases		Operating Leases
Remaining nine months of 2021	$	193	$	8,089
2022	—		9,102
2023	—		6,994
2024	—		5,449
2025	—		5,046
Thereafter	—		19,066
Total lease payments	193		53,746
Less: Present value discount	—		(8,995)
Total lease liabilities	$	193	$	44,751

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The following table summarizes the Company's lease terms and discount rates as of March 31, 2021 and 2020:

Weighted-average remaining lease terms (in years):	2021		2020
Operating leases	7.13		6.38
Finance leases	0.25		1.19
Weighted-average discount rate:
Operating leases	5.28	%	5.36	%
Finance leases	3.50	%	3.24	%

12.    Debt

As previously disclosed, the Company's primary credit facility is the $300.0 million revolving line of credit (the "Credit Facility") with Wells Fargo Bank. In addition to the Credit Facility, certain of the Company’s domestic subsidiaries are guarantors for a credit agreement between certain of its foreign subsidiaries and institutional lenders. Together, these credit facilities provide the Company with a total of $304.0 million in revolving credit lines and an irrevocable standby letter of credit in support of various insurance deductibles. There were no outstanding balances as of March 31, 2021 and December 31, 2020. There was $150.2 million outstanding balance as of March 31, 2020.

The Company was in compliance with its financial covenants under the loan agreement as of March 31, 2021.

13.    Commitments and Contingencies

Environmental

The Company’s policy with regard to environmental liabilities is to accrue for future environmental assessments and remediation costs when information becomes available that indicates that it is probable that the Company is liable for any related claims and assessments and the amount of the liability is reasonably estimable. The Company does not believe that any such matters will have a material adverse effect on the Company’s financial condition, cash flows or results of operations.

Litigation and Potential Claims

From time to time, the Company is involved in various legal proceedings and other matters arising in the normal course of business. Corrosion, hydrogen embrittlement, cracking, material hardness, wood pressure-treating chemicals, misinstallations, misuse, design and assembly flaws, manufacturing defects, labeling defects, product formula defects, inaccurate chemical mixes, adulteration, environmental conditions, or other factors can contribute to failure of fasteners, connectors, anchors, adhesives, specialty chemicals, such as fiber reinforced polymers, and tool products. In addition, inaccuracies may occur in product information, descriptions and instructions found in catalogs, packaging, data sheets, and the Company’s website.

The resolution of any claim or litigation is subject to inherent uncertainty and could have a material adverse effect on the Company’s financial condition, cash flows or results of operations.

Gentry Homes, Ltd. v. Simpson Strong-Tie Company Inc., et al., Case No. 17-cv-00566, was filed in a federal district court in Hawaii against Simpson Strong-Tie Company Inc. and the Company on November 20, 2017. The Gentry case is a product of a previous state court class action, Nishimura v. Gentry Homes, Ltd., et al., Civil No. 11-1-1522-07, which is now closed. The Nishimura case concerned alleged corrosion of the Company’s galvanized “hurricane straps” and mudsill anchor products used in a residential project in Ewa by Gentry, Honolulu, Hawaii. In the Nishimura case, the plaintiff homeowners and the developer, Gentry Homes, Ltd. (“Gentry”), arbitrated their dispute and agreed on a settlement in the amount of approximately $90 million. In the subsequent Gentry case, Gentry alleges breach of warranty and negligent misrepresentation by the Company related to its “hurricane strap” and mudsill anchor products. At this time, the Company and the plaintiffs have reached a settlement in principle and are currently negotiating a definitive written agreement memorializing the settlement. Should the parties be unable to reach an accord on terms of the written agreement, further negotiations may take place that could result in a different settlement, or the case may continue on to trial. Based on the facts currently known, and subject to future events and

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circumstances, the Company believes that all or part of the damages for the claims brought against it in the Gentry case may be covered by its insurance policies.

14.    Segment Information

The Company is organized into three reporting segments defined by the regions where the Company’s products are manufactured, marketed and distributed to the Company’s customers. The three regional segments are the North America segment (comprised primarily of the Company’s operations in the U.S. and Canada), the Europe segment and the Asia/Pacific segment (comprised of the Company’s operations in Asia, the South Pacific, and the Middle East). These segments are similar in several ways, including the types of materials used, the production processes, the distribution channels and the product applications.

The following tables illustrate certain measurements used by management to assess the performance of its reportable segments as of or for the following periods: 

	Three Months Ended March 31,
(in thousands)	2021		2020
Net Sales
North America	$	300,564	$	249,050
Europe	44,296		32,732
Asia/Pacific	2,782		1,886
Total	$	347,642	$	283,668
Sales to Other Segments*
North America	$	696	$	640
Europe	1,609		1,254
Asia/Pacific	8,527		4,813
Total	$	10,832	$	6,707
Income (Loss) from Operations
North America	$	69,410	$	53,561
Europe	2,291		(1,670)
Asia/Pacific	425		(604)
Administrative and all other	(3,743)		(1,937)
Total	$	68,383	$	49,350

*    Sales to other segments are eliminated in consolidation.

					At
	At March 31,				December 31,
(in thousands)	2021		2020		2020
Total Assets
North America	$	1,125,887	$	1,153,775	$	1,059,967
Europe	198,363		163,476		198,647
Asia/Pacific	31,831		27,919		32,754
Administrative and all other	(61,354)		(146,922)		(58,799)
Total	$	1,294,727	$	1,198,248	$	1,232,569

Cash collected by the Company’s United States subsidiaries is routinely transferred into the Company’s cash management accounts and, therefore, has been included in the total assets of “Administrative and all other.” Cash and cash equivalent balances in the “Administrative and all other” segment were $183.2 million, $248.7 million, and $199.8 million, as of March 31, 2021 and 2020, and December 31, 2020, respectively. Total "Administrative and all other" assets are net of inter-segment due to and from accounts eliminated in consolidation.

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While the Company manages its business by geographic segment, the following table illustrates the distribution of the Company’s net sales by product group as additional information for the following periods:

	Three Months Ended March 31,
(in thousands)	2021		2020
Wood construction products	$	301,578	$	242,520
Concrete construction products	45,523		41,012
Other	541		136
Total	$	347,642	$	283,668

Wood construction products include connectors, truss plates, fastening systems, fasteners and pre-fabricated shearwalls, and are used for connecting and strengthening wood-based construction primarily in the residential construction market. Concrete construction products include adhesives, chemicals, mechanical anchors, carbide drill bits, powder actuated tools and fiber reinforcing materials, and are used for restoration, protection or strengthening concrete, masonry and steel construction in residential, industrial, commercial and infrastructure construction.

15.    Subsequent Events

On May 4, 2021, the Company’s Board of Directors declared a quarterly cash dividend of $0.25 per share, estimated to be $10.9 million in total. The dividend will be payable on July 22, 2021, to the Company's stockholders of record on July 1, 2021.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Each of the terms the “Company,” “we,” “our,” “us” and similar terms used herein refer collectively to Simpson Manufacturing Co., Inc., a Delaware corporation and its wholly-owned subsidiaries, including Simpson Strong-Tie Company Inc., unless otherwise stated. The Company regularly uses its website to post information regarding its business and governance. The Company encourages investors to use http://www.simpsonmfg.com as a source of information about the Company.

“Strong-Tie” and our other trademarks appearing in this report are our property. This report contains additional trade names and trademarks of other companies. We do not intend our use or display of other companies’ trade names or trademarks to imply an endorsement or sponsorship of us by such companies, or any relationship with any of these companies.

CAUTIONARY NOTE ABOUT FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Forward-looking statements generally can be identified by words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “target,” “continue,” “predict,” “project,” “change,” “result,” “future,” “will,” “could,” “can,” “may,” “likely,” “potentially,” or similar expressions that concern our strategy, plans, expectations or intentions. Forward-looking statements include, but are not limited to, statements about future financial and operating results, our plans, objectives, business outlook, priorities, expectations and intentions, expectations for sales growth, comparable sales, earnings and performance, stockholder value, capital expenditures, cash flows, the housing market, the home improvement industry, demand for services, share repurchases, our strategic initiatives, including the impact of these initiatives on our strategic and operational plans and financial results, and any statement of an assumption underlying any of the foregoing and other statements that are not historical facts. Although we believe that the expectations, opinions, projections and comments reflected in these forward-looking statements are reasonable, such statements involve risks and uncertainties and we can give no assurance that such statements will prove to be correct. Actual results may differ materially from those expressed or implied in such statements.

Forward-looking statements are subject to inherent uncertainties, risk and other factors that are difficult to predict and could cause our actual results to vary in material respects from what we have expressed or implied by these forward-looking statements. Important factors that could cause our actual results and financial condition to differ materially from those expressed in our forward looking statements include, among others, those discussed under the Item 1A. Risk Factors and Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations in the 2020 Form 10-K. Additional risks include: the cyclicality and impact of general economic conditions; changing conditions in global markets including the impact of sanctions and tariffs, quotas and other trade actions and import restrictions; the impact of pandemics, epidemics or other public health emergencies, such as the recent outbreak of coronavirus disease 2019 (COVID-19); volatile supply and demand conditions affecting prices and volumes in the markets for both our products and raw materials we purchase; the impact of foreign currency fluctuations; potential limitations on our ability to access capital resources and existing credit facilities; restrictions on our business and financial covenants under our bank credit agreement; and reliance on employees subject to collective bargaining agreements.

We caution that you should not place undue reliance on these forward-looking statements, which speak only as of the date of this report. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise. Readers are urged to carefully review and consider the various disclosures made by us in this report and in our other reports filed with the SEC that advise of the risks and factors that may affect our business.

Overview

We design, manufacture and sell building construction products that are of high quality and performance, easy to use and cost-effective for customers. We operate in three business segments determined by geographic region: North America, Europe and Asia/Pacific.

At our March 23, 2021 virtual analyst and investor day, we unveiled several key growth initiatives that we believe will help us continue our track record of above market growth through a combination of organic and inorganic opportunities. Our organic opportunities are focused on expansion into new markets within our core competencies of wood and concrete products. These growth initiatives will focus on the original equipment manufacturers, repair and remodel or do-it-yourself, mass timber, concrete and structural steel markets.

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In order to grow in these markets, we aspire to be among the leaders in engineered load-rated construction building products and systems and customer-facing technology while leveraging our engineering expertise, deep-rooted relationships with top builders, engineers, contractors, code officials and distributors, along with our ongoing commitment to testing, research and innovation. Importantly, we currently have existing products, testing results, distribution and manufacturing capabilities for all five of our growth initiatives. It is also important to note that these initiatives are all currently in different stages of development. Our successful growth in these areas will ultimately be a function of expanding our sales and/or marketing functions to promote our products to different end users and distribution channels, expanding our customer base, and potentially introducing new products in the future.

Also during the virtual analyst and investor day, we highlighted our Five-year Ambitions, which are as follows:

1.strengthen our values-based culture;

2.be the business partner of choice;

3.strive to be an innovative leader in our product categories;

4.continue above market growth relative to the U.S. housing starts;

5.remain within the top quartile of our proxy peers for operating income margins; and

6.remain in the top quartile of our proxy peers for return on invested capital.

As with our growth initiatives, further updates will be forthcoming related to material developments with our Five-year Ambitions.

A novel strain of coronavirus (“COVID-19”) surfaced in late 2019 and has spread around the world, including to the United States. In March 2020, the World Health Organization declared COVID-19 a worldwide pandemic and the President of the United States declared the COVID-19 outbreak a national emergency. As of April 30, 2021, the virus continues to spread and has had a significant impact on worldwide economic activity and on macroeconomic conditions. Vaccines are available in various countries and distribution of the vaccine also varies by country and in the U.S. by state. The duration and severity of its effects are still unknown.

Government authorities in the countries and states where we operate have issued various and differing shelter in place, stay at home, social distancing guidelines and other measures in response to the COVID-19 pandemic. In many of those locations our operations are classified as an essential business and we continue to operate our business in compliance with applicable state and local laws and are observing recommended CDC guidelines to minimize the risk of spreading the COVID-19 virus. We have undertaken numerous steps and instituted additional precautions to protect our employees, suppliers and customers, as their safety and well-being is one of our top priorities, and to comply with health and safety guidelines, including enhanced deep cleaning, staggered shifts, temperature checking, use of face masks, practicing social distancing and limiting non-employees at our locations, amongst other safety related policies and procedures. Many of our office workers in our manufacturing and distribution facilities, as well as the corporate headquarters, continue to work remotely, where possible

The Company’s management team continues to monitor and manage its ability to operate effectively and, to date, the Company has not experienced any significant disruptions within its supply chain. Our supply chain partners have been very supportive and continue to do their part to ensure that service levels to our customers remain strong and, to date, we have not experienced any supply-chain disruptions related to COVID-19 and have been able to meet our customers’ needs. We will continue to communicate with our supply chain partners to identify and mitigate risk and to manage inventory levels.

In response to the COVID-19 pandemic the Company proactively took measures to maintain and preserve its strong financial position and flexibility. Based on updated expectations, the Company resumed hiring to meet increased demand levels that it has experienced. The Crisis Management Team, which includes members of senior management, meets regularly to review and assess the status of the Company's operations and the health and safety of its employees. Notwithstanding the Company's continued efforts, as the COVID-19 pandemic continues, health concern risks remain, and we cannot predict whether we or any of our suppliers will experience disruptions, or how long such disruptions would last. It also remains unclear how various national, state, and local governments will react if the distribution of vaccines is slower than expected or new variants of the virus become more dominant.

A significant portion of the Company's total product sales is dependent on U.S. housing starts and its business, financial condition, and results of operations depends significantly on the level of housing and residential construction activity. We anticipated previously that housing starts would continue to grow at slow pace as in prior years. However, single-family housing starts increased significantly from prior-year's level of starts. The return of Lowe's and a strong home repair and

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remodel market also contributed to increased demand and a significant increase in sales during the first quarter of 2021 compared to the 2020. While we believe demand will remain strong in the short-term, and factoring in recently announced sales price increases, will result in higher net sales in future periods. However, our sales in the first quarter 2021 and a significant portion of 2020 were positively impacted by the return of Lowe's. The remaining quarters of this fiscal year and the comparable periods of 2020 will include the return of Lowes and, as a result, we don't think sales volumes for the remainder of 2021 will grow at the same year-over-year rate as the first quarter of 2021 compared to the first quarter of 2020. In the short-term, operating profits are expected to improve on increased selling prices and lower average material costs as higher costs of raw material purchases are absorbed into current product costs. However, increased steel costs, product sourcing logistic complications and potential increases in US income tax rates could result in lower operating and net income margins by the end of 2021.

Management continues to monitor the impact of the global situation on its financial condition, liquidity, operations, suppliers, industry, and workforce.

Factors Affecting Our Results of Operations

Unlike lumber or other products that have a more direct correlation to U.S. housing starts, our products are used to a greater extent in areas that are subject to natural forces, such as seismic or wind events. Our products are generally used in a sequential process that follows the construction process. Residential and commercial construction begins with the foundation, followed by the wall and the roof systems, and then the installation of our products, which flow into a project or a house according to these schedules.

Our sales also tend to be seasonal, with operating results varying from quarter to quarter. With some exceptions, our sales and income have historically been lower in the first and fourth quarters than in the second and third quarters of a fiscal year, as our customers tend to purchase construction materials in the late spring and summer months for the construction season. Weather conditions, such as extended cold or wet weather, which affect and sometimes delay installation of some of our products, could negatively affect our results of operations. Political, economic events such as tariffs and the possibility of additional tariffs on imported raw materials or finished goods or such as labor disputes can also have an effect on our gross and operating profits as well as the amount of inventory on-hand. Our operations can also be affected by a volatile steel market. Changes in raw material cost could negatively affect our gross profit margins depending on the timing of raw material purchases or how much sales prices can be increased to offset higher raw material costs.

Our operations expose us to risks associated with pandemics, epidemics or other public health emergencies, such as the COVID-19 pandemic which spread from China to many other countries including the U.S.

ERP Integration

In July 2016, our Board of Directors approved a plan to replace our current in-house enterprise resource planning (“ERP”) and externally sourced accounting platforms with a fully integrated ERP platform from SAP America, Inc. (“SAP”) in multiple phases by location at all facilities plus our headquarters, with a focus on configuring, instead of customizing, the standard SAP modules.

We went live with our first wave of the SAP implementation project in February of 2018, and completed implementation at our North America operations in 2021. We expect to complete the company-wide SAP implementation during 2022. Meeting the goal is highly dependent on the lifting of current travel restrictions, which are the result of the COVID-19 pandemic. While we believe the SAP implementation will be beneficial to the Company over time, annual operating expenses have and are expected to continue to increase through 2024 as a result of the SAP implementation, primarily due to increases in training costs and the depreciation of previously capitalized costs.

Business Segment Information

Historically our North America segment has generated more revenues from wood construction products compared to concrete construction products. During the first three months of 2021, the return of Lowe's, favorable weather, increased home improvement activity and increased housing starts resulted in higher sales volumes over the same time period of 2020. Our wood construction product net sales increased 22.4% for the quarter ended March 31, 2021 compared to March 31, 2020, primarily due to increased sales volumes in connection with the return of Lowe's and increased housing starts and repair and remodel activity, which resulted in increased sales to some of our other distribution channels. Our concrete construction product

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net sales increased 9.6% for the quarter ended March 31, 2021 compared to March 31, 2020, primarily due to higher sales volumes. Operating profits increased due to higher sales, lower cost of goods sold, mostly due to lower labor and factory costs, partly offset by higher operating expenses including primarily stock-based compensation expense. If current economic conditions continue and factoring in recently announced sales price increases, we believe North America operating margins could be higher in 2021 compared to 2020. However, increased steel costs and product sourcing complications could result in lower operating margins towards the end of 2021 or early 2022.

Our Europe segment also generates more revenues from wood construction products than concrete construction products. Europe net sales increased for the quarter ended March 31, 2021 compared to March 31, 2020, primarily due to higher sales volumes in local currency and were positively affected by approximately $3.6 million in foreign currency translation related to Europe's currencies strengthening against the United States dollar. Wood construction product sales increased 37.8% for the quarter ended March 31, 2021 compared to March 31, 2020. Concrete construction product sales are mostly project based, and net sales increased 20.6% for the quarter ended March 31, 2021 compared to March 31, 2020. Gross margins increased, mostly due to lower factory, warehouse and shipping costs, partly offset by higher material costs. Operating expenses increased, primarily due to higher cash profit sharing and stock-based compensation expense. If current economic conditions continue and factoring in recently announced sales price increases, we believe Europe operating margins could be higher in 2021 compared to 2020. However, increased steel costs and product sourcing complications could offset sales price increases, negatively affecting operating margins towards the end of 2021 or early 2022.

Our Asia/Pacific segment has generated revenues from both wood and concrete construction products. We believe that the Asia/Pacific segment is not significant to our overall performance.

Business Outlook

On February 8, 2021, the Company provided a full-year outlook. The Company is updating its full year outlook, primarily reflecting one quarter of actual results, as well as improved visibility on the progression of pandemic-related restrictions and the impact of those restrictions on the Company’s operations. Based on business trends and conditions as of today, April 26, the Company's outlook for the full fiscal year ending December 31, 2021 is as follows:

•Operating margin is estimated to be in the range of 19.5% to 22.0%.

•The effective tax rate is estimated to be in the range of 25.0% to 26.0%, including both federal and state income tax rates.

•Capital expenditures are estimated to be in the range of $50 million to $55 million.

Results of Operations for the Three Months Ended March 31, 2021, Compared with the Three Months Ended March 31, 2020

Unless otherwise stated, the below results, when providing comparisons (which are generally indicated by words such as “increased,” “decreased,” “unchanged” or “compared to”), compare the results of operations for the three months ended March 31, 2021, against the results of operations for the three months ended March 31, 2020. Unless otherwise stated, the results announced below, when referencing “both quarters,” refer to the three months ended March 31, 2020 and the three months ended March 31, 2021.

First Quarter 2021 Consolidated Financial Highlights

The following table illustrates the differences in our operating results for the three months ended March 31, 2021, from the three months ended March 31, 2020, and the increases or decreases for each category by segment:

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	Three Months Ended										Three Months Ended
			Increase (Decrease) in Operating Segment
	March 31,		North				Asia/		Admin &		March 31,
(in thousands)	2020		America		Europe		Pacific		All Other		2021
Net sales	$	283,668	$	51,514	$	11,564	$	896	$	—	$	347,642
Cost of sales	154,002		24,479		7,015		(181)		45		185,360
Gross profit	129,666		$	27,035	$	4,549	$	1,077	(45)		162,282
Research and development and other engineering expense	13,382		1,104		54		51		—		14,591
Selling expense	28,527		2,090		139		65		2		30,823
General and administrative expense	38,471		7,951		378		6		1,759		48,565
Total operating expenses	80,380		11,145		571		122		1,761		93,979
Net loss (gain) on disposal of assets	(64)		41		17		(74)		—		(80)
Income from operations	49,350		15,849		3,961		1,029		(1,806)		68,383
Interest income (expense), net and other	(2,533)		(383)		1,735		83		(680)		(1,778)
Income before income taxes	46,817		15,466		5,696		1,112		(2,486)		66,605
Provision for income taxes	9,991		5,640		891		203		(507)		16,218
Net income	$	36,826	$	9,826	$	4,805	$	909	$	(1,979)	$	50,387

Net sales increased 22.6% to $347.6 million from $283.7 million primarily due to increases in sales volumes. Wood construction product net sales, including sales of connectors, truss plates, fastening systems, fasteners and shearwalls, represented 86.7% and 85.5% of the Company's total net sales in the first quarters of 2021 and 2020, respectively. Concrete construction product net sales, including sales of adhesives, chemicals, mechanical anchors, powder actuated tools and reinforcing fiber materials, represented 13.1% and 14.5% of the Company's total net sales in the first quarters of 2021 and 2020, respectively.

Gross profit increased 25.2% to $162.3 million from $129.7 million. Gross margins increased to 46.7% from 45.7%, primarily due to lower factory and labor, partly offset by higher material costs each as a percentage of net sales. Gross margins, including some inter-segment expenses, which were eliminated in consolidation, and excluding other expenses that are allocated according to product group, increased to 46.6% from 45.3% for wood construction products and decreased to 42.5% from 44.2% for concrete construction products, respectively.

Research and development and engineering expense increased 9.0% to $14.6 million from $13.4 million, primarily due to increases of $0.6 million in personnel costs, $0.3 million in professional fees and $0.2 million in patent expense, partly offset by $0.2 million reduction in travel-associated costs.

Selling expense increased 8.0% to $30.8 million from $28.5 million, primarily due to increases of $1.5 million in stock-based compensation, $0.9 million in personnel costs, and $0.8 million in professional fees, partly offset by decreases of $0.8 million in travel–associated expenses.

General and administrative expense increased 26.2% to $48.6 million from $38.5 million, primarily due to increases of $5.0 million in stock-based compensation expense, $2.4 million in professional fees, $2.1 million in personnel costs, and $0.9 million in amortization and depreciation expense, partly offset by a decrease of $0.7 million in travel–associated expenses. Included in general and administrative expense are SAP implementation and support costs of $3.3 million, which increased $0.7 million from the prior quarter.

Our effective income tax rate increased to 24.3% from 21.3%, primarily due to lower windfall tax benefits on the vesting of restricted stock units during the first quarter of 2021 compared to 2020.

Consolidated net income was $50.4 million compared to $36.8 million. Diluted net income per common share was $1.16 compared to $0.83.

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Net sales

The following table represents net sales by segment for the three-month periods ended March 31, 2021 and 2020, respectively:

	North						Asia/
(in thousands)	America			Europe			Pacific			Total
Three months ended
March 31, 2020	$	249,050		$	32,732		$	1,886		$	283,668
March 31, 2021	300,564			44,296			2,782			347,642
Increase	$	51,514		$	11,564		$	896		$	63,974
Percentage increase	20.7		%	35.3		%	47.5		%	22.6		%

The following table represents segment net sales as percentages of total net sales for the three-month periods ended March 31, 2021 and 2020, respectively:

	North America		Europe		Asia/ Pacific		Total
Percentage of total 2020 net sales	88	%	12	%	—	%	100	%
Percentage of total 2021 net sales	87	%	13	%	—	%	100	%

Gross profit

The following table represents gross profit by segment for the three-month periods ended March 31, 2021 and 2020, respectively:

	North		Asia/	Admin &
(in thousands)	America	Europe	Pacific	All Other	Total
Three months ended
March 31, 2020	$118,795	$10,701	$167	$3	$129,666
March 31, 2021	145,830	15,250	1,244	(42)	162,282
Increase	$27,035	$4,549	$1,077	$(45)	$32,616
Percentage Increase	22.8%	42.5%	*	*	25.2%

* The statistic is not meaningful or material.

The following table represents gross profit as a percentage of sales by segment for the three months ended March 31, 2021 and 2020, respectively:

	North America		Europe		Asia/ Pacific		Admin & All Other	Total
2020 gross profit percentage	47.7	%	32.7	%	8.9	%	*	45.7	%
2021 gross profit percentage	48.5	%	34.4	%	44.7	%	*	46.7	%

* The statistic is not meaningful or material.

North America

•Net sales increased 20.7%, primarily due to higher sales volumes from the return of Lowe's and increased repair and remodel activity, as well as from other distribution channels, which also benefited from increases in new housing starts and repair and remodel activity. Canada's net sales also increased primarily due to higher sales volumes and were positively impacted by approximately $0.8 million in foreign currency translation.

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•Gross profit as a percentage of net sales increased to 48.5% from 47.7%, primarily due to lower labor, factory, warehouse and freight costs, each as a percentage of net sales, partly offset by higher material costs as a percentage of net sales.

•Research, development and engineering expenses increased 9.0%, primarily due to increases of $0.5 million in personnel costs and $0.3 million in professional fees, and $0.2 million in patent costs.

•Selling expense increased 9.1%, primarily due to increases of $1.8 million in personnel costs, $1.5 million in stock-based compensation, and $0.7 million in professional fees, offset by decreases of $2.0 million in travel–associated expenses.

•General and administrative expense increased 26.6%, primarily due to increases of $3.5 million in stock-based compensation expense, $2.8 million for professional\legal fees, $1.4 million in personnel costs, $0.9 million in depreciation and amortization, partly offset by a decrease of $0.5 million in travel-related expenses.

•Income from operations increased by $15.8 million, primarily due to increased gross profit, partly offset by higher operating expenses.

Europe

•Net sales increased 35.3%, primarily due to higher sales volumes and were positively affected by approximately $3.6 million in foreign currency translation related to Europe's currencies strengthening against the United States dollar.

•Gross profit as a percentage of net sales decreased to 34.4% from 32.7%, primarily due to lower factory, warehouse and shipping costs, partly offset by higher material costs, each as a percentage of net sales.

•Income from operations increased by $4.0 million, primarily due to higher gross profits.

Asia/Pacific

•For information about the Company's Asia/Pacific segment, please refer to the tables above setting forth changes in our operating results for the three months ended March 31, 2021 and 2020, respectively.

Admin & All Other

•General and administrative expense increased $1.8 million, primarily due to increases of $0.7 million in cash profit sharing expense, $0.6 million in stock-based compensation expense, $0.6 million in professional/legal fees, and $0.4 million in increase personnel costs.

Effect of New Accounting Standards

See "Note 1 Basis of Presentation — Not Yet Adopted Accounting Standards” to the accompanying unaudited interim condensed consolidated financial statements.

Liquidity and Sources of Capital

The Company is a borrower, and certain domestic subsidiaries are guarantors, under a revolving credit agreement with Wells Fargo Bank, N.A. as administrative agent, and certain other lenders, which provides the Company with a $300.0 million revolving line of credit (the “Credit Facility”) that expires July 23, 2022, and an irrevocable standby letter of credit in support of various insurance deductibles.

Our principal uses of liquidity include the costs and expenses associated with our operations, including financing working capital requirements and continuing our capital allocation strategy, which includes supporting capital expenditures, repurchasing the Company's common stock, paying cash dividends, and financing other investment opportunities over the next twelve months.

As of March 31, 2021, our cash and cash equivalents consisted of deposits and money market funds held with established national financial institutions. Cash and cash equivalents of $74.2 million are held in the local currencies of our foreign

27

operations and could be subject to additional taxation if repatriated to the United States. The Company is maintaining a permanent reinvestment assertion on its foreign earnings relative to remaining cash held outside the United States.

The following table presents selected financial information as of March 31, 2021, December 31, 2020 and March 31, 2020, respectively:

	At March 31,		At December 31,		At March 31,
(in thousands)	2021		2020		2020
Cash and cash equivalents	$	257,428	$	274,639	$	301,741
Property, plant and equipment, net	255,684		255,184		246,941
Goodwill, intangible assets and other	165,918		165,110		157,527
Working capital less cash and cash equivalents	336,759		284,439		287,391

The following table provides cash flow indicators for the three-month periods ended March 31, 2021 and 2020, respectively:

	Three Months Ended March 31,
(in thousands)	2021		2020
Net cash provided by (used in):
Operating activities	$	17,833	$	12,725
Investing activities	(15,729)		(6,234)
Financing activities	(15,422)		68,567

Cash flows from operating activities result primarily from our earnings, and are also affected by changes in operating assets and liabilities which consist primarily of working capital balances. As a significant portion of our revenues are derived from manufacturing building construction materials. Our operating cash flows are subject to seasonality and are cyclically associated with the volume and timing of construction project starts. For example, trade accounts receivable is generally at its lowest at the end of the fourth quarter and increases during the first, second and third quarters.

During the three months ended March 31, 2021, operating activities provided $17.8 million in cash and cash equivalents, as a result of $50.4 million from net income and $20.6 million from non-cash adjustments to net income, which included depreciation and amortization expense and stock-based compensation expense. Cash provided from net income was partly offset by a decrease of $53.1 million in the net change in operating assets and liabilities, including increases of $62.7 million in trade accounts receivable, $14.8 million in inventory and $14.1 million in other current assets, partly offset by increases of $22.1 million in other current liabilities and $17.3 million in trade accounts payable.

Cash used in investing activities of $15.7 million during the three months ended March 31, 2021 was mainly for capital expenditures and a $5.3 million investment in a venture capital fund. Our capital spending in 2019, 2020 and the three months ended March 31, 2021 was $37.5 million, $37.9 million and $10.5 million, respectively, which was primarily used for machinery and equipment purchases and software in development. Based on current information and subject to future events and circumstances, we expect new capital spending for fiscal year 2021 will be in the $50 million to $55 million range which includes carryover projects from 2020 that were paused due to COVID-19 concerns. Capital spending will be primarily for safety needs, equipment replacement and productivity improvements. At this time only a small amount of capital spending is related to our growth initiatives.

Cash used in financing activities of $15.4 million during the three months ended March 31, 2021 consisted primarily of $10.0 million used to pay dividends to our stockholders and $5.3 million used to pay income taxes on behalf of the employees for shares withheld with respect to their vested restricted stock units.

On May 4, 2021, the Board raised the quarterly cash dividend to $0.25 per share, estimated to be $10.9 million in total. The Company last raised the quarterly dividend $0.01 per share to $0.23 per share on April 26, 2019. The dividend will be payable on July 22, 2021, to the Company's stockholders of record on July 1, 2021.

As illustrated in the table below, since 2015, the Company has repurchased over seven-and-a-half million shares of the Company's common stock, which represents approximately 15.7% of our shares of common stock outstanding at the beginning

28

of 2015. Including dividends, we have returned cash of $647.8 million, which represents 69.9% of our total cash flow from operations during the same period.

(in thousands)	Number of Shares Repurchased	Cash Paid for Share Repurchases		Cash paid for Dividends		Total
January 1 - March 31, 2021	—	$	—	$	9,967	$	9,967
January 1 - December 31, 2020	1,053	$	76,189	$	40,400	$	116,589
January 1 - December 31, 2019	972	60,816		40,258		101,074
January 1 - December 31, 2018	1,955	110,540		39,891		150,431
January 1 - December 31, 2017	1,138	70,000		36,981		106,981
January 1 - December 31, 2016	1,244	53,502		32,711		86,213
January 1 - December 31, 2015	1,339	47,144		29,352		76,496
Total	7,701	$	418,191	$	229,560	$	647,751

As of March 31, 2021, $100.0 million was available for future repurchases of common stock under our share repurchase authorization (which expires at the end of 2021).

Off-Balance Sheet Arrangements

We did not have any off-balance sheet arrangements as of March 31, 2021.

Inflation and Raw Materials

We believe that the effect of inflation has not been material in recent years, as general inflation rates have remained relatively low. However, the cost of steel, lumber and petroleum products have increased in the last few quarters as had housing prices on strong demand, especially for new housing compared to a limited supply. This could have an effect on the general inflation rates in future quarters. Our main raw material is steel. As such, increased steel prices may adversely affect our gross profit margin if we cannot recover the higher costs through price increases in a timely manner.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

We have operations both within the United States and internationally, and are exposed to market risks in the ordinary course of our business.

Foreign Exchange Risk

We have foreign exchange rate risk in our international operations, and through purchases from foreign vendors. Changes in the values of currencies of foreign countries affect our financial position, income statement and cash flows when translated into U.S. dollars. We estimate that if the exchange rate were to change by 10% in any one country where we have our operations, the change in net income would not be material to our operations taken as a whole.

We may manage our exposure to transactional exposures by entering into foreign currency forward contracts for forecasted transactions and projected cash flows for foreign currencies in future periods. In 2020 and 2021, we entered into financial contracts to hedge the risk of fluctuations associated with the Chinese Yuan.

Foreign currency translation adjustments on our underlying assets and liabilities resulted in an accumulated other comprehensive loss of $9.3 million for the three months ended March 31, 2021, due to the effects of the weakening United States dollar in relation to almost all other currencies.

Interest Rate Risk

Our primary exposure to interest rate risk results from outstanding borrowings under the Credit Facility, which bears interest at variable rates. The variable interest rates on the Credit Facility fluctuate and exposes us to short-term changes in market interest rates as our interest obligation on this instrument is based on prevailing market interest rates. Interest rates fluctuate as a result

29

of many factors, including governmental monetary and tax policies, domestic and international economic and political considerations and other factors that are beyond our control.

Item 4. Controls and Procedures.

Disclosure Controls and Procedures. As of March 31, 2021, the Company carried out an evaluation, under the supervision and with the participation of the Company’s management, including the chief executive officer (“CEO”) and the chief financial officer (“CFO”), of the effectiveness of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act. Based on this evaluation, the Company’s CEO and CFO have concluded that the Company’s disclosure controls and procedures were effective at the reasonable assurance level. Disclosure controls and procedures are controls and other procedures designed reasonably to assure that information required to be disclosed in the Company’s reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures are also designed reasonably to assure that this information is accumulated and communicated to the Company’s management, including the CEO and the CFO, as appropriate to allow timely decisions regarding required disclosure.

The Company’s management, including the CEO and the CFO, does not, however, expect that the Company’s disclosure controls and procedures or the Company’s internal control over financial reporting will prevent all fraud and material errors. Internal control over financial reporting, no matter how well conceived and operated, can provide only reasonable, not absolute assurance that the objectives of the control system are met. In addition, the design of a control system must reflect the facts that there are resource constraints and that the benefits of controls must be considered relative to their costs. The inherent limitations in internal control over financial reporting include the realities that judgments can be faulty and that breakdowns can occur because of simple error or mistake. Controls also can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of controls. The design of any system of internal control is also based in part on assumptions about the likelihood of future events, and there can be only reasonable, not absolute assurance that any design will succeed in achieving its stated goals under all potential events and conditions. Over time, controls may become inadequate because of changes in circumstances, or the degree of compliance with the policies and procedures may deteriorate.

Changes in Internal Control over Financial Reporting. In 2016, we began the process of implementing a fully integrated ERP platform from SAP America, Inc. (“SAP”), as part of a multi-year plan to integrate and upgrade our systems and processes. The first phase of this implementation became operational, at most of our North America sales, production, warehousing and administrative locations between February 2018 and October 2020. We believe the necessary steps have been taken to monitor and maintain appropriate internal control over financial reporting during this period of change and will continue to evaluate the operating effectiveness of related key controls during subsequent periods.

As the phased implementation of this system continues, we are experiencing certain changes to our processes and procedures which, in turn, result in changes to our internal control over financial reporting. While we expect SAP to strengthen our internal financial controls by automating certain manual processes and standardizing business processes and reporting across our organization, management will continue to evaluate and monitor our internal controls as each of the affected areas evolves. For a discussion of risks related to the implementation of new systems, see Item 1A - "Risk Factors - Other Risks - We rely on complex software systems and hosted applications to operate our business, and our business may be disrupted if we are unable to successfully/efficiently update these systems or convert to new systems." in the 2020 Form 10-K.

There were no changes in our internal control over financial reporting identified in management's evaluation pursuant to Rules 13a-15(d) or 15d-15(d) of the Exchange Act during the three months ended March 31, 2021 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings.

From time to time, the Company is involved in various legal proceedings and other matters arising in the normal course of business. Corrosion, hydrogen embrittlement, cracking, material hardness, wood pressure-treating chemicals, misinstallations, misuse, design and assembly flaws, manufacturing defects, labeling defects, product formula defects, inaccurate chemical mixes, adulteration, environmental conditions, or other factors can contribute to failure of fasteners, connectors, anchors,

30

adhesives, specialty chemicals, such as fiber reinforced polymers, and tool products. In addition, inaccuracies may occur in product information, descriptions and instructions found in catalogs, packaging, data sheets, and the Company’s website.

The Company currently is not a party to any legal proceedings, which the Company expects individually or in the aggregate to have a material adverse effect on the Company’s financial condition, cash flows or results of operations. Nonetheless, the resolution of any claim or litigation is subject to inherent uncertainty and we could in the future, incur judgments, enter into settlements of claims or revise our expectations regarding the outcome of the various legal proceedings and other matters we are currently involved in, which could materially impact our financial condition, cash flows or results of operations. See “Note 13 — Commitments and Contingencies” to the accompanying unaudited interim condensed consolidated financial statements for certain potential third-party claims.

Item 1A. Risk Factors

There have been no material changes to our risk factors reported or new risk factors identified since the filing of our Annual Report on Form 10-K for the year ended December 31, 2020.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

The table below presents the monthly repurchases of shares of our common stock in the first quarter of 2021.

	(a)	(b)		(c)	(d)
Period	Total Number of Shares Purchased [1][2]	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs [2]	Approximate Dollar Value of Shares that May Yet Be Purchased under the Plans or Programs [2]
January 1 - January 31, 2021	—	$	—	—	—
February 1 - February 28, 2021	55,157	$	95.53	—	—
March 1 - March 31, 2021	298	$	90.82	—	—
Total	55,455

[1] Total number of shares purchased includes shares withheld for settlement of payroll taxes from stock-based compensation awards vested for retirement eligible employees who retired during the first quarter of 2021.

[2] Pursuant to the Board’s $100.0 million repurchase authorization that was publicly announced on December16, 2020, which authorization is scheduled to expire on December 31, 2021.

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Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosure.

Not applicable.

Item 5. Other Information.

None.

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Item 6. Exhibits.

	EXHIBIT INDEX
3.1	Certificate of Incorporation of Simpson Manufacturing Co., Inc., as amended, are incorporated by reference to Exhibit 3.1 of its Quarterly Report on Form 10-Q filed on May 9, 2018
3.2	Amended and Restated Bylaws of Simpson Manufacturing Co., Inc., as amended, are incorporated by reference to Exhibit 3.2 of its Current Report on Form 8-K dated March 28, 2017.
31.1	Chief Executive Officer's Rule 13a-14(a)/15d-14(a) Certifications is filed herewith.
31.2	Chief Financial Officer's Rule 13a-14(a)/15d-14(a) Certifications is filed herewith.
32	Section 1350 Certifications are furnished herewith.
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	Inline XBRL Taxonomy Schema Linkbase Document
101.CAL	Inline XBRL Taxonomy Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Labels Linkbase Document
101.PRE	Inline XBRL Taxonomy Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

33

SIGNATURES

Pursuant to the requirements 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.

		Simpson Manufacturing Co., Inc.
		(Registrant)
DATE:	May 6, 2021	By /s/Brian J. Magstadt
		Brian J. Magstadt
		Chief Financial Officer
		(principal accounting and financial officer)

34

EX-31.1

Exhibit 31.1

Simpson Manufacturing Co., Inc. and Subsidiaries

Rule 13a-14(a)/15d-14(a) Certifications

I, Karen Colonias, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Simpson Manufacturing Co., 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.

DATE:	May 6, 2021	By /s/Karen Colonias
		Karen Colonias
		Chief Executive Officer

38

EX-31.2

Exhibit 31.2

Simpson Manufacturing Co., Inc. and Subsidiaries

Rule 13a-14(a)/15d-14(a) Certifications

I, Brian J. Magstadt, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Simpson Manufacturing Co., 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.

DATE:	May 6, 2021	By /s/Brian J. Magstadt
		Brian J. Magstadt
		Chief Financial Officer

39

EX-32

Exhibit 32

Simpson Manufacturing Co., Inc. and Subsidiaries

Section 1350 Certifications

The undersigned, Karen Colonias and Brian J. Magstadt, being the duly elected and acting Chief Executive Officer and Chief Financial Officer, respectively, of Simpson Manufacturing Co., Inc., a Delaware corporation (the “Company”), hereby certify that the quarterly report of the Company on Form 10-Q for the quarterly period ended March 31, 2021, fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934, as amended, and that information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company.

DATE:	May 6, 2021	By /s/Karen Colonias
		Karen Colonias
		Chief Executive Officer
		By /s/Brian J. Magstadt
		Brian J. Magstadt
		Chief Financial Officer

A signed original of this written statement required by Section 1350 of Chapter 63 of Title 18 of the United States Code has been provided to Simpson Manufacturing Co., Inc. and will be retained by Simpson Manufacturing Co., Inc. and furnished to the Securities and Exchange Commission or its staff on request.

The foregoing certification is being furnished to the Securities and Exchange Commission pursuant to § 18 U.S.C. Section 1350. It is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-13429
Entity Registrant Name	SIMPSON MANUFACTURING CO INC /CA/
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3196943
Entity Address, Address	5956 W. Las Positas Blvd.
Entity Address, City or Town	Pleasanton
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94588
City Area Code	925
Local Phone Number	560-9000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SSD
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		43,430,766
Amendment Flag	false
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Entity Central Index Key	0000920371
Current Fiscal Year End Date	--12-31

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Current assets
Cash and cash equivalents	$ 257,428	$ 274,639	$ 301,741
Trade accounts receivable, net	227,201	165,128	168,736
Inventories	296,640	283,742	255,720
Other current assets	37,732	29,630	25,786
Total current assets	819,001	753,139	751,983
Property, plant and equipment, net	255,684	255,184	246,941
Operating lease right-of-use assets	44,236	45,792	33,725
Goodwill	133,477	135,844	131,599
Intangible assets, net	25,059	26,800	23,454
Other noncurrent assets	17,270	15,810	10,546
Total Assets	1,294,727	1,232,569	1,198,248
Current liabilities
Trade accounts payable	66,236	48,271	44,505
Accrued liabilities and other current liabilities	158,578	145,790	118,346
Total current liabilities	224,814	194,061	162,851
Operating lease liabilities	35,810	37,199	26,084
Long term debt, net of current portion	0	0	150,000
Deferred income tax and other long-term liabilities	19,594	20,366	17,719
Total liabilities	280,218	251,626	356,654
Commitments and contingencies (see Note 13)
Stockholders’ equity
Common stock, at par value	435	433	444
Additional paid-in capital	285,896	284,007	272,872
Retained earnings	760,862	720,441	672,485
Treasury stock	(13,510)	(13,510)	(72,058)
Accumulated other comprehensive loss	(19,174)	(10,428)	(32,149)
Total stockholders’ equity	1,014,509	980,943	841,594
Total liabilities and stockholders’ equity	$ 1,294,727	$ 1,232,569	$ 1,198,248

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Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 347,642	$ 283,668
Cost of sales	185,360	154,002
Gross profit	162,282	129,666
Operating expenses:
Research and development and other engineering	14,591	13,382
Selling	30,823	28,527
General and administrative	48,565	38,471
Total operating expenses	93,979	80,380
Net gain on disposal of assets	(80)	(64)
Income from operations	68,383	49,350
Interest expense, net and other	(1,778)	(2,533)
Income before taxes	66,605	46,817
Provision for income taxes	16,218	9,991
Net income	50,387	36,826
Translation adjustment	(9,264)	(7,593)
Unamortized pension adjustments	492	273
Unrealized gains on derivative instruments	26	0
Comprehensive net income	$ 41,641	$ 29,506
Earnings per common share:
Basic	$ 1.16	$ 0.84
Diluted	$ 1.16	$ 0.83
Number of shares outstanding
Basic	43,379	44,099
Diluted	43,612	44,286
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23

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Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2019	$ 891,957	$ 442	$ 280,216	$ 645,507	$ (24,829)	$ (9,379)
Balance (in shares) at Dec. 31, 2019		44,209
Increase (Decrease) in Stockholders' Equity
Net income	36,826			36,826
Translation adjustment	(7,593)				(7,593)
Pension adjustment, net of tax	273				273
Unrealized gains on derivative instruments	0
Stock-based compensation	33		33
Shares issued from release of Restricted Stock Units	(7,697)	$ 2	(7,699)
Shares issued from release of Restricted Stock Units (in shares)		153
Repurchase of common stock	(62,679)					(62,679)
Repurchase of common stock (in shares)		(902)
Cash dividends declared on common stock	(9,848)			(9,848)
Common stock issued	322		322
Common stock issued (in shares)		4
Balance at Mar. 31, 2020	841,594	$ 444	272,872	672,485	(32,149)	(72,058)
Balance (in shares) at Mar. 31, 2020		43,464
Balance at Dec. 31, 2020	980,943	$ 433	284,007	720,441	(10,428)	(13,510)
Balance (in shares) at Dec. 31, 2020		43,326
Increase (Decrease) in Stockholders' Equity
Net income	50,387			50,387
Translation adjustment	(9,264)				(9,264)
Pension adjustment, net of tax	492				492
Unrealized gains on derivative instruments	26				26
Stock-based compensation	6,462		6,462
Shares issued from release of Restricted Stock Units	(5,263)	$ 1	(5,264)
Shares issued from release of Restricted Stock Units (in shares)		97
Cash dividends declared on common stock	(9,966)			(9,966)
Common stock issued	692	$ 1	691
Common stock issued (in shares)		7
Balance at Mar. 31, 2021	$ 1,014,509	$ 435	$ 285,896	$ 760,862	$ (19,174)	$ (13,510)
Balance (in shares) at Mar. 31, 2021		43,430

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Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23
Common stock issued per share for stock bonus (in USD per share)	$ 93.45	$ 80.38

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Cash Flows [Abstract]
Net income	$ 50,387	$ 36,826
Adjustments to reconcile net income to net cash provided by operating activities:
Loss/(gain) on sale of assets and other	333	(58)
Depreciation and amortization	11,225	9,734
Noncash lease expense	2,393	1,997
Deferred income taxes	314	1,430
Noncash compensation related to stock plans	6,542	277
Provision of doubtful accounts	(215)	721
Changes in operating assets and liabilities:
Trade accounts receivable	(62,660)	(32,161)
Inventories	(14,750)	(5,962)
Trade accounts payable	17,301	11,018
Other current assets	(14,109)	(6,821)
Accrued liabilities and other current liabilities	22,126	(4,927)
Other noncurrent assets and liabilities	(1,054)	651
Net cash provided by operating activities	17,833	12,725
Cash flows from investing activities
Capital expenditures	(10,505)	(6,795)
Invest in equity investments	(5,329)	0
Proceeds from sale of property and equipment	105	561
Net cash used in investing activities	(15,729)	(6,234)
Cash flows from financing activities
Repurchase of common stock	0	(62,679)
Proceeds from lines of credit	0	154,529
Repayments of lines of credit and capital leases	(192)	(5,415)
Dividends paid	(9,967)	(10,169)
Cash paid on behalf of employees for shares withheld	(5,263)	(7,699)
Net cash used by in financing activities	(15,422)	68,567
Effect of exchange rate changes on cash and cash equivalents	(3,893)	(3,527)
Net (decrease) increase in cash and cash equivalents	(17,211)	71,531
Cash and cash equivalents at beginning of period	274,639	230,210
Cash and cash equivalents at end of period	257,428	301,741
Noncash activity during the period
Noncash capital expenditures	1,526	289
Dividends declared but not paid	9,967	10,204
Issuance of Company’s common stock for compensation	$ 692	$ 322

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Basis of Presentation

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of Simpson Manufacturing Co., Inc. and its subsidiaries (collectively, the “Company”). Investments in 50% or less owned entities are accounted for using either cost or the equity method. All significant intercompany transactions have been eliminated.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("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. Management believes that these consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation under GAAP. We assessed certain accounting matters that require the use of estimates and assumptions in context with the known and projected future impacts of COVID-19. The Company's actual results could differ materially from those estimates.

Interim Reporting Period

The accompanying unaudited quarterly condensed consolidated financial statements have been prepared pursuant to the rules and regulations for reporting on Form 10-Q. Accordingly, certain information and footnotes required by GAAP have been condensed or omitted. These interim statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (the “2020 Form 10-K”).

The unaudited quarterly condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, contain all adjustments (consisting of only normal recurring adjustments) necessary to state fairly the financial information set forth therein in accordance with GAAP. Certain prior period amounts in the condensed consolidated financial statements and the accompanying notes have been reclassified to conform to the current period’s presentation. The year-end condensed consolidated balance sheet data provided herein were derived from audited financial statements included in the 2020 Form 10-K, but do not include all disclosures required by GAAP. The Company’s quarterly results fluctuate. As a result, the Company believes the results of operations for this interim period presented are not indicative of the results to be expected for any future periods.

Revenue Recognition

Generally, the Company’s revenue contract with a customer exists when goods are shipped, and services (if any) are rendered; and its related invoice is generated. The duration of the contract does not extend beyond the promised goods or services already transferred. The transaction price of each distinct promised product or service specified in the invoice is based on its relative stated standalone selling price. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product to a customer at a point in time. The Company’s shipping terms provide the primary indicator of the transfer of control. The Company’s general shipping terms are F.O.B. shipping point, where title and risk and rewards of ownership transfer at the point when the products leave the Company’s warehouse. The Company recognizes revenue based on the consideration specified in the invoice with a customer, excluding any sales incentives, discounts, and amounts collected on behalf of third parties (i.e., governmental tax authorities). Based on historical experience with the customer, the customer's purchasing pattern and its significant experience selling products, the Company concluded that a significant reversal in the cumulative amount of revenue recognized will not occur when the uncertainty (if any) is resolved (that is, when the total amount of purchases is known). Refer to Note 2 for additional information.

Net Income Per Common Share

The Company calculates net income per common share based on the weighted-average number of shares of the Company's common stock outstanding during the period. Potentially dilutive securities are included in the diluted per-share calculations using the treasury stock method for all periods when the effect is dilutive.

Accounting for Leases

The Company has operating and finance leases for certain facilities, equipment, autos and data centers. As an accounting policy for short-term leases, the Company elected to not recognize the right-of-use asset and liability, if, at the commencement date, the lease (1) has a term of 12 months or less and (2) does not include renewal and purchase options that the Company is reasonably certain to exercise. Monthly payments on short-term leases are recognized on the straight-line basis over the full lease term.

Accounting for Stock-Based Compensation

The Company recognizes stock-based compensation expense related to the estimated fair value of restricted stock awards on a straight-line basis, net of estimated forfeitures, over the requisite service period of the awards, which is generally the vesting term of four years. Stock-based expense related to performance share grants are measured based on grant date fair value and expensed on a graded basis over the service period of the awards, which is generally a performance period of three years. The performance conditions are based on the Company's achievement of revenue growth and return on invested capital over the performance period, and are evaluated for the probability of vesting at each reporting period end with changes in expected results recognized as an adjustment to expense. The assumptions used to calculate the fair value of restricted stock grants are evaluated and revised, as necessary, to reflect market conditions and the Company’s experience.

Fair Value of Financial Instruments

Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified under a three-tier fair valuation hierarchy based on the observability of the inputs available in the market: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and Level 3 inputs are unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The carrying amounts of trade accounts receivable, accounts payable, accrued liabilities and other current liabilities approximate fair value due to the short-term nature of these instruments. The fair value of the Company’s contingent consideration related to acquisitions and equity investment are classified as Level 3 within the fair value hierarchy as it is based on unobserved inputs such as management estimates and entity-specific assumptions and is evaluated on an ongoing basis. The fair value of foreign currency forward contracts, calculated based on Level 1 inputs, was not material as of March 31, 2021.

Derivative Instruments - Foreign Currency Contracts

The Company uses derivative instruments as a risk management tool to mitigate the potential impact of certain market risks. Foreign currency exchange rate risk is the primary market risk the Company manages through the use of derivative instruments, which are accounted for as cash flow hedges under the accounting standards and carried at fair value as other current assets or other current liabilities in the consolidated balance sheets. Net deferred gains and losses related to changes in fair value are included in accumulated other comprehensive loss, a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. Changes in fair value of any derivatives that are determined to be ineffective are immediately reclassified from other comprehensive income into earnings. The cash flow impact of the Company's derivative instruments is primarily included in the consolidated statement of cash flows in net cash provided by operating activities. Refer to Note 8.

Cash and Cash Equivalents

The Company classifies investments that are highly liquid and have maturities of three months or less at the date of purchase as cash equivalents. As of March 31, 2021 and 2020, the value of these investments were $28.2 million and $0.1 million, respectively, consisting of U.S. Treasury securities and money market funds. The value of the investments is based on cost, which approximates fair value based on Level 1 inputs.

Current Estimated Credit Loss - Allowance for doubtful accounts

The Company maintains an allowance for doubtful accounts receivable for estimated future expected credit losses resulting from customers' failure to make payments on its accounts receivable. The Company determines the estimate of the allowance for doubtful accounts receivable by considering several factors, including (1) specific information on the financial condition and the current creditworthiness of customers, (2) credit rating, (3) payment history and historical experience, (4) aging of the accounts receivable, and (5) reasonable and supportable forecasts about collectability. The Company also reserves 100% of the amounts deemed uncollectible due to a customer's deteriorating financial condition or bankruptcy.

Every quarter, the Company evaluates the customer group using the accounts receivable aging report and its best judgment when considering changes in customers' credit ratings, level of delinquency, customers' historical payments and loss experience, current market and economic conditions, and expectations of future market and economic conditions.

The changes in the allowance for doubtful accounts receivable for the year ended March 31, 2021 are outlined in the table below:

	Balance at		Amounts		Balance at
(in thousands)	December 31, 2020		Charged to Expense	Write-Offs1	March 31, 2021
Allowance for Doubtful Accounts	$	2,110	(215)	119	$	1,776

1Amount is net of recoveries and the effect of foreign currency fluctuations for the year ended March 31, 2021.

Income Taxes

The Company uses an estimated annual tax rate to measure the tax benefit or tax expense recognized in each interim period.

Accounting Standards Not Yet Adopted

In March 2020, the FASB issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848). ASU 2020-04 provides optional guidance to ease the potential burden in accounting for reference rate reform on financial reporting in response to the risk of cessation of the London Interbank Offered Rate (“LIBOR”) on December 31, 2021. The ASU allows the option to account for and present a modification that meets the scope of the standard as an event that does not require contract remeasurement at the modification date or reassessment of a previous accounting determination required under the relevant topic or subtopic. Generally, the ASU allows hedge accounting to continue if the hedge was highly effective or met other standards prior to reference rate reform. Entities are permitted to apply the amendments to all contracts, cash flow and net investment hedge relationships that exist as of March 12, 2020. The relief provided in this ASU is only available for a limited time, generally through December 31, 2022. The Company's Credit Facility maturing on July 23, 2022 bears interest using LIBOR plus an applicable margin. We do not expect a material impact to our consolidated operating results, financial position or cash flows from the transition from LIBOR to alternative reference interest rates, but we will continue to monitor the impact of this transition until it is completed.

All issued and effective accounting standards during the first quarter of 2021 were determined to be not relevant or material to the Company.

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Revenue from Contract with Customer Revenue from Contract with Customer

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer

Revenue from Contracts with Customers

Disaggregated revenue

The Company disaggregates net sales into the following major product groups as described in the footnote for segment information included in these interim financial statements under Note 14.

Wood Construction Products Revenue. Wood construction products represented 87% and 86% of total net sales in the three months ended March 31, 2021 and 2020, respectively.

Concrete Construction Products Revenue. Concrete construction products represented 13% and 14% of total net sales in the three months ended March 31, 2021 and 2020, respectively.

Customer acceptance criteria. Generally, there are no customer acceptance criteria included in the Company's standard sales agreement with customers. When an arrangement with the customer does not meet the criteria to be accounted for as a revenue contract under the standard, the Company recognizes revenue in the amount of nonrefundable consideration received when the Company has transferred control of the goods or services and has stopped transferring (and has no obligation to transfer) additional goods or services. The Company offers certain customers discounts for paying invoices ahead of the due date, which are generally between 30 to 60 days after the issue date.

Other revenue. Service sales, representing after-market repair and maintenance, engineering activities and software license sales and services were less than 1.0% of net sales and recognized as the services are completed or by transferring control over a product to a customer at a point in time. Services may be sold separately or in bundled packages. The typical contract length for a service is generally less than one year. For bundled packages, the Company accounts for individual services separately when they are distinct within the context of the contract. A distinct service is separately identifiable from other items in the bundled package if a customer can benefit from the service on its own or with other resources that are readily available to the customer. The consideration (including any discounts) is allocated between separate services in a bundle based on their relative stand-alone selling prices. The stand-alone selling prices are determined based on the prices at which the Company separately sells the services.

Reconciliation of contract balances

Contract assets are the rights to consideration in exchange for goods or services that the Company has transferred to a customer when that right is conditional on something other than the passage of time. Contract liabilities are recorded for any services billed to customers and not yet recognizable if the contract period has commenced or for the amount collected from customers in advance of the contract period commencing. As of March 31, 2021, the Company had no contract assets or contract liabilities from contracts with customers.

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Net income Per Share (Notes)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Net Income Per Share

3.    Net Income Per Share

The following table reconciles basic net income per share of the Company's common stock to diluted net income per share for the three months ended March 31, 2021 and 2020, respectively:

	Three Months Ended    March 31,
(in thousands, except per share amounts)	2021		2020
Net income available to common stockholders	$	50,387	$	36,826
Basic weighted-average shares outstanding	43,379		44,099
Dilutive effect of potential common stock equivalents — restricted stock units	233		187
Diluted weighted-average shares outstanding	43,612		44,286
Net income per common share:
Basic	$	1.16	$	0.84
Diluted	$	1.16	$	0.83

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Stockholders' Equity Stockholders' Equity

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Stockholders' Equity

Stockholders' Equity

Treasury Shares

As of March 31, 2021, the Company held 150,974 shares of its common stock as treasury shares.

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Stock-Based Compensation Stock-Based Compensation

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The Company allocates stock-based compensation expense related to equity plans for employees and non-employee directors among the cost of sales, research and development and other engineering expense, selling expense, or general and administrative expense based on the job functions performed by the employees to whom the stock-based compensation is awarded. The Company recognized stock-based compensation expense related to its equity plans for employees of $6.5 million and $0.3 million for the three months ended March 31, 2021 and 2020, respectively. The $6.2 million increase in stock-based compensation expense was due to the reevaluation of the expected performance conditions and updated expected vesting during the first quarter of 2021 compared to the first quarter of 2020.

During the three months ended March 31, 2021, the Company granted 133,424 restricted stock units ("RSUs") to the Company's employees, including officers at an estimated weighted average fair value of $100.26 per share based on the closing price (adjusted for the present value of dividends) of the Company's common stock on the grant date. The RSUs granted to the Company's employees may be performance-based and/or time-based. Certain performance-based RSUs are granted to officers and key employees, where the number of performance-based awards to be issued is based on the achievement of certain Company performance criteria established in the RSU agreement over a cumulative three-year period. These awards cliff vest after three years. In addition, these same officers and key employees also receive time-based RSUs, which vest pursuant to a three-year graded vesting schedule. Time-based RSUs that are granted to the Company's employees excluding officers and certain key employees, vest ratably over the four year vesting-term of the award.

As of March 31, 2021, the Company's aggregate unamortized stock compensation expense was approximately $24.0 million, is expected to be recognized in expense over a weighted-average period of 2.6 years.

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Trade Accounts Receivable, Net

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Trade Accounts Receivable, Net

Trade Accounts Receivable, Net

Trade accounts receivable at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Trade accounts receivable	$	232,646	$	174,853	$	170,001
Allowance for doubtful accounts	(1,776)		(2,761)		(2,110)
Allowance for sales discounts and returns	(3,669)		(3,356)		(2,763)
	$	227,201	$	168,736	$	165,128

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Inventories

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Raw materials	$	94,340	$	89,903	$	95,777
In-process products	22,678		19,464		21,803
Finished products	179,622		146,353		166,162
	$	296,640	$	255,720	$	283,742

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Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

Property, plant and equipment, net, at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Land	$	28,280	$	27,964	$	28,553
Buildings and site improvements	201,283		193,971		203,421
Leasehold improvements	7,023		4,832		7,091
Machinery, equipment, and software	385,195		354,931		372,923
	621,781		581,698		611,988
Less accumulated depreciation and amortization	(382,907)		(351,776)		(377,460)
	238,874		229,922		234,528
Capital projects in progress	16,810		17,019		20,656
	$	255,684	$	246,941	$	255,184

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Goodwill and Intangible Assets, Net

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

Goodwill and Intangible Assets, Net

Goodwill at the dates indicated was as follows: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
North America	$	96,340	$	95,988	$	96,311
Europe	35,684		34,445		38,059
Asia/Pacific	1,453		1,166		1,474
Total	$	133,477	$	131,599	$	135,844

Intangible assets, net, at the dates indicated were as follows: 

	At March 31, 2021
	Gross				Net
	Carrying		Accumulated		Carrying
(in thousands)	Amount		Amortization		Amount
North America	$	40,785	$	(23,724)	$	17,061
Europe	26,347		(18,349)		7,998
Total	$	67,132	$	(42,073)	$	25,059

	At March 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	33,755	$	(20,039)	$	13,716
Europe	25,410		(15,672)		9,738
Total	$	59,165	$	(35,711)	$	23,454

	At December 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	40,786	$	(22,697)	$	18,089
Europe	26,341		(17,630)		8,711
Total	$	67,127	$	(40,327)	$	26,800

Intangible assets consist of definite-lived and indefinite-lived assets. Definite-lived intangible assets include customer relationships, patents, unpatented technology, and non-compete agreements. Amortization expense of definite-lived intangible assets was $1.7 million and $1.5 million for the three months ended March 31, 2021 and 2020, respectively. The weighted-average amortization period for all amortizable intangibles on a combined basis is 6.3 years.

The only indefinite-lived intangible asset, consisting of a trade name, totaled $0.6 million at March 31, 2021.

At March 31, 2021, the estimated future amortization of definite-lived intangible assets was as follows: 

(in thousands)
Remaining nine months of 2021	$	4,619
2022	4,223
2023	3,390
2024	2,343
2025	2,086
2026	1,483
Thereafter	6,300
	$	24,444

The changes in the carrying amount of goodwill and intangible assets for the three months ended March 31, 2021, were as follows: 

			Intangible
(in thousands)	Goodwill		Assets
Balance at December 31, 2020	$	135,844	$	26,800
Reclassifications	(106)		348
Amortization	—		(1,746)
Foreign exchange	(2,261)		(343)
Balance at March 31, 2021	$	133,477	$	25,059

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Leases Leases

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Leases

11.    Leases

Operating Lease and Finance Obligations

The Company has operating leases for certain facilities, equipment and autos. The existing operating leases expire at various dates through 2025, some of which include options to extend the leases for up to 5 years. The Company measured the lease liability at the present value of the lease payments to be made over the lease term. The lease payments are discounted using the Company's incremental borrowing rate. The Company measured the right-of-use assets ("ROU") assets at the amount at which the lease liability is recognized plus initial direct costs incurred or prepayment amounts. The ROU assets are amortized on a straight-line basis over the lease term.

Finance Lease Obligations

The Company has finance leases for data centers and certain office equipment, which was recorded in fixed assets as capital lease obligations. These finance lease obligations are included in current liabilities and other long-term liabilities in the accompanying consolidated balance sheets. The interest rates for these two capital leases are 2.89% and 3.50%, respectively, and the two leases will mature in May 2021 and July 2021, respectively.

The following table provides a summary of leases included on the condensed consolidated balance sheets March 31, 2021, 2020 and December 31, 2020, condensed consolidated statements of earnings, and condensed consolidated statements of cash flows as of the three months and three months ended March 31, 2021 and 2020:

	Condensed Consolidated Balance Sheets Line Item	March 31,				December 31,
(in thousands)		2021		2020		2020
Operating leases
Assets
Operating leases	Operating lease right-of-use assets	$	44,236	$	33,725	$	45,792
Liabilities
Operating - current	Accrued expenses and other current liabilities	$	8,941	$	7,603	$	9,143
Operating - noncurrent	Operating lease liabilities	35,810		26,084		37,199
Total operating lease liabilities		$	44,751	$	33,687	$	46,342
Finance leases
Assets
Property and equipment, gross	Property, plant and equipment, net	$	3,569	$	3,566	$	3,569
Accumulated amortization	Property, plant and equipment, net	(3,188)		(2,903)		(3,112)
Property and equipment, net	Property, plant and equipment, net	$	381	$	663	$	457
Liabilities
Other current liabilities	Accrued expenses and other current liabilities	$	193	$	1,125	$	384
Other long-term liabilities	Deferred income tax and other long-term liabilities	—		6		—
Total finance lease liabilities		$	193	$	1,131	$	384

The components of lease expense were as follows:

	Condensed Consolidated Statements of Operations Line Item	Three Months Ended March 31,
(in thousands)		2021		2020
Operating lease cost	General administrative expenses and      cost of sales	$	2,859	$	2,492
Finance lease cost:
Amortization of right-of-use         assets	General administrative expenses	$	216	$	218
Interest on lease liabilities	Interest expense, net	2		11
Total finance lease		$	218	$	229

Other information

Supplemental cash flow information related to leases as follows:

	Three Months Ended March 31,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	2,805	$	2,418
Finance cash flows for finance leases	290		290
Operating right-of-use assets obtained in exchange for lease      obligations during the current period	786		2,068

The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2021:

(in thousands)	Finance Leases		Operating Leases
Remaining nine months of 2021	$	193	$	8,089
2022	—		9,102
2023	—		6,994
2024	—		5,449
2025	—		5,046
Thereafter	—		19,066
Total lease payments	193		53,746
Less: Present value discount	—		(8,995)
Total lease liabilities	$	193	$	44,751

The following table summarizes the Company's lease terms and discount rates as of March 31, 2021 and 2020:

Weighted-average remaining lease terms (in years):	2021		2020
Operating leases	7.13		6.38
Finance leases	0.25		1.19
Weighted-average discount rate:
Operating leases	5.28	%	5.36	%
Finance leases	3.50	%	3.24	%

Leases

Leases

Operating Lease and Finance Obligations

The Company has operating leases for certain facilities, equipment and autos. The existing operating leases expire at various dates through 2025, some of which include options to extend the leases for up to 5 years. The Company measured the lease liability at the present value of the lease payments to be made over the lease term. The lease payments are discounted using the Company's incremental borrowing rate. The Company measured the right-of-use assets ("ROU") assets at the amount at which the lease liability is recognized plus initial direct costs incurred or prepayment amounts. The ROU assets are amortized on a straight-line basis over the lease term.

Finance Lease Obligations

The Company has finance leases for data centers and certain office equipment, which was recorded in fixed assets as capital lease obligations. These finance lease obligations are included in current liabilities and other long-term liabilities in the accompanying consolidated balance sheets. The interest rates for these two capital leases are 2.89% and 3.50%, respectively, and the two leases will mature in May 2021 and July 2021, respectively.

The following table provides a summary of leases included on the condensed consolidated balance sheets March 31, 2021, 2020 and December 31, 2020, condensed consolidated statements of earnings, and condensed consolidated statements of cash flows as of the three months and three months ended March 31, 2021 and 2020:

	Condensed Consolidated Balance Sheets Line Item	March 31,				December 31,
(in thousands)		2021		2020		2020
Operating leases
Assets
Operating leases	Operating lease right-of-use assets	$	44,236	$	33,725	$	45,792
Liabilities
Operating - current	Accrued expenses and other current liabilities	$	8,941	$	7,603	$	9,143
Operating - noncurrent	Operating lease liabilities	35,810		26,084		37,199
Total operating lease liabilities		$	44,751	$	33,687	$	46,342
Finance leases
Assets
Property and equipment, gross	Property, plant and equipment, net	$	3,569	$	3,566	$	3,569
Accumulated amortization	Property, plant and equipment, net	(3,188)		(2,903)		(3,112)
Property and equipment, net	Property, plant and equipment, net	$	381	$	663	$	457
Liabilities
Other current liabilities	Accrued expenses and other current liabilities	$	193	$	1,125	$	384
Other long-term liabilities	Deferred income tax and other long-term liabilities	—		6		—
Total finance lease liabilities		$	193	$	1,131	$	384

The components of lease expense were as follows:

	Condensed Consolidated Statements of Operations Line Item	Three Months Ended March 31,
(in thousands)		2021		2020
Operating lease cost	General administrative expenses and      cost of sales	$	2,859	$	2,492
Finance lease cost:
Amortization of right-of-use         assets	General administrative expenses	$	216	$	218
Interest on lease liabilities	Interest expense, net	2		11
Total finance lease		$	218	$	229

Other information

Supplemental cash flow information related to leases as follows:

	Three Months Ended March 31,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	2,805	$	2,418
Finance cash flows for finance leases	290		290
Operating right-of-use assets obtained in exchange for lease      obligations during the current period	786		2,068

The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2021:

(in thousands)	Finance Leases		Operating Leases
Remaining nine months of 2021	$	193	$	8,089
2022	—		9,102
2023	—		6,994
2024	—		5,449
2025	—		5,046
Thereafter	—		19,066
Total lease payments	193		53,746
Less: Present value discount	—		(8,995)
Total lease liabilities	$	193	$	44,751

The following table summarizes the Company's lease terms and discount rates as of March 31, 2021 and 2020:

Weighted-average remaining lease terms (in years):	2021		2020
Operating leases	7.13		6.38
Finance leases	0.25		1.19
Weighted-average discount rate:
Operating leases	5.28	%	5.36	%
Finance leases	3.50	%	3.24	%

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Debt Debt

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt

As previously disclosed, the Company's primary credit facility is the $300.0 million revolving line of credit (the "Credit Facility") with Wells Fargo Bank. In addition to the Credit Facility, certain of the Company’s domestic subsidiaries are guarantors for a credit agreement between certain of its foreign subsidiaries and institutional lenders. Together, these credit facilities provide the Company with a total of $304.0 million in revolving credit lines and an irrevocable standby letter of credit in support of various insurance deductibles. There were no outstanding balances as of March 31, 2021 and December 31, 2020. There was $150.2 million outstanding balance as of March 31, 2020.

The Company was in compliance with its financial covenants under the loan agreement as of March 31, 2021.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Environmental

The Company’s policy with regard to environmental liabilities is to accrue for future environmental assessments and remediation costs when information becomes available that indicates that it is probable that the Company is liable for any related claims and assessments and the amount of the liability is reasonably estimable. The Company does not believe that any such matters will have a material adverse effect on the Company’s financial condition, cash flows or results of operations.

Litigation and Potential Claims

From time to time, the Company is involved in various legal proceedings and other matters arising in the normal course of business. Corrosion, hydrogen embrittlement, cracking, material hardness, wood pressure-treating chemicals, misinstallations, misuse, design and assembly flaws, manufacturing defects, labeling defects, product formula defects, inaccurate chemical mixes, adulteration, environmental conditions, or other factors can contribute to failure of fasteners, connectors, anchors, adhesives, specialty chemicals, such as fiber reinforced polymers, and tool products. In addition, inaccuracies may occur in product information, descriptions and instructions found in catalogs, packaging, data sheets, and the Company’s website.

The resolution of any claim or litigation is subject to inherent uncertainty and could have a material adverse effect on the Company’s financial condition, cash flows or results of operations.

Gentry Homes, Ltd. v. Simpson Strong-Tie Company Inc., et al., Case No. 17-cv-00566, was filed in a federal district court in Hawaii against Simpson Strong-Tie Company Inc. and the Company on November 20, 2017. The Gentry case is a product of a previous state court class action, Nishimura v. Gentry Homes, Ltd., et al., Civil No. 11-1-1522-07, which is now closed. The Nishimura case concerned alleged corrosion of the Company’s galvanized “hurricane straps” and mudsill anchor products used in a residential project in Ewa by Gentry, Honolulu, Hawaii. In the Nishimura case, the plaintiff homeowners and the developer, Gentry Homes, Ltd. (“Gentry”), arbitrated their dispute and agreed on a settlement in the amount of approximately $90 million. In the subsequent Gentry case, Gentry alleges breach of warranty and negligent misrepresentation by the Company related to its “hurricane strap” and mudsill anchor products. At this time, the Company and the plaintiffs have reached a settlement in principle and are currently negotiating a definitive written agreement memorializing the settlement. Should the parties be unable to reach an accord on terms of the written agreement, further negotiations may take place that could result in a different settlement, or the case may continue on to trial. Based on the facts currently known, and subject to future events and

circumstances, the Company believes that all or part of the damages for the claims brought against it in the Gentry case may be covered by its insurance policies.

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Segment Information

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company is organized into three reporting segments defined by the regions where the Company’s products are manufactured, marketed and distributed to the Company’s customers. The three regional segments are the North America segment (comprised primarily of the Company’s operations in the U.S. and Canada), the Europe segment and the Asia/Pacific segment (comprised of the Company’s operations in Asia, the South Pacific, and the Middle East). These segments are similar in several ways, including the types of materials used, the production processes, the distribution channels and the product applications.

The following tables illustrate certain measurements used by management to assess the performance of its reportable segments as of or for the following periods: 

	Three Months Ended March 31,
(in thousands)	2021		2020
Net Sales
North America	$	300,564	$	249,050
Europe	44,296		32,732
Asia/Pacific	2,782		1,886
Total	$	347,642	$	283,668
Sales to Other Segments*
North America	$	696	$	640
Europe	1,609		1,254
Asia/Pacific	8,527		4,813
Total	$	10,832	$	6,707
Income (Loss) from Operations
North America	$	69,410	$	53,561
Europe	2,291		(1,670)
Asia/Pacific	425		(604)
Administrative and all other	(3,743)		(1,937)
Total	$	68,383	$	49,350

*    Sales to other segments are eliminated in consolidation.

					At
	At March 31,				December 31,
(in thousands)	2021		2020		2020
Total Assets
North America	$	1,125,887	$	1,153,775	$	1,059,967
Europe	198,363		163,476		198,647
Asia/Pacific	31,831		27,919		32,754
Administrative and all other	(61,354)		(146,922)		(58,799)
Total	$	1,294,727	$	1,198,248	$	1,232,569

Cash collected by the Company’s United States subsidiaries is routinely transferred into the Company’s cash management accounts and, therefore, has been included in the total assets of “Administrative and all other.” Cash and cash equivalent balances in the “Administrative and all other” segment were $183.2 million, $248.7 million, and $199.8 million, as of March 31, 2021 and 2020, and December 31, 2020, respectively. Total "Administrative and all other" assets are net of inter-segment due to and from accounts eliminated in consolidation.

While the Company manages its business by geographic segment, the following table illustrates the distribution of the Company’s net sales by product group as additional information for the following periods:

	Three Months Ended March 31,
(in thousands)	2021		2020
Wood construction products	$	301,578	$	242,520
Concrete construction products	45,523		41,012
Other	541		136
Total	$	347,642	$	283,668

Wood construction products include connectors, truss plates, fastening systems, fasteners and pre-fabricated shearwalls, and are used for connecting and strengthening wood-based construction primarily in the residential construction market. Concrete construction products include adhesives, chemicals, mechanical anchors, carbide drill bits, powder actuated tools and fiber reinforcing materials, and are used for restoration, protection or strengthening concrete, masonry and steel construction in residential, industrial, commercial and infrastructure construction.

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Subsequent Events Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On May 4, 2021, the Company’s Board of Directors declared a quarterly cash dividend of $0.25 per share, estimated to be $10.9 million in total. The dividend will be payable on July 22, 2021, to the Company's stockholders of record on July 1, 2021.

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities Disclosure

Derivative Instruments

The Company transacts business in various foreign countries and may therefore be exposed to foreign currency exchange rate risk. The Company has established risk management programs to protect against volatility in the value of non-functional future cash flows caused by changes in foreign currency exchange rates and tries to maintain a partial or fully hedged position for certain transaction exposures when management considers appropriate. The Company enters into short-term foreign currency derivatives contracts, namely forward contracts, to hedge only those currency exposures associated with cash flows denominated in non-functional currencies. Gains and losses on the Company's derivative contracts are designed to offset losses and gains on the transactions hedged, and accordingly, generally do not subject the Company to risk of significant accounting losses. The Company hedges committed exposures and does not engage in speculative transactions. The credit risk of these derivative contracts is minimized since the contracts are with a large financial institution and accordingly, fair value adjustments related to the credit risk of the counterparty financial institution are not material.

The Company sources certain materials for its concrete products from a wholly owned subsidiary in China, and as a result is exposed to variability in cash outflows associated with changes in the foreign exchange rate between the U.S. Dollar and the Chinese Yuan (CNY). As of March 31, 2021, the aggregate notional amount of the Company's outstanding foreign currency derivative contracts was to buy CNY62.2 million by selling $9.1 million throughout fiscal 2021. These forward contracts are accounted for as cash flow hedges under the accounting standards, and fair value is included in other current assets or other current liabilities, as applicable, in the consolidated balance sheet was $0.4 million.

Net deferred gains and losses on these contracts relating to changes in fair value are included in accumulated other comprehensive loss ("OCI"), a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. There were no amounts recognized for gains or losses on these contracts during the quarter ended March 31, 2021. Changes in fair value of any forward contracts that are determined to be ineffective are immediately reclassified from OCI into earnings. The amounts deferred in OCI are expected to be recognized as a component of cost of sales in the consolidated statement of operations from 2021 to 2022. There were no amounts recognized due to ineffectiveness during the quarter ended March 31, 2021.

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation

Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of Simpson Manufacturing Co., Inc. and its subsidiaries (collectively, the “Company”). Investments in 50% or less owned entities are accounted for using either cost or the equity method. All significant intercompany transactions have been eliminated.

Use of Estimates, Policy

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("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. Management believes that these consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation under GAAP. We assessed certain accounting matters that require the use of estimates and assumptions in context with the known and projected future impacts of COVID-19. The Company's actual results could differ materially from those estimates.

Interim Period Reporting

Interim Reporting Period

The accompanying unaudited quarterly condensed consolidated financial statements have been prepared pursuant to the rules and regulations for reporting on Form 10-Q. Accordingly, certain information and footnotes required by GAAP have been condensed or omitted. These interim statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (the “2020 Form 10-K”).

The unaudited quarterly condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, contain all adjustments (consisting of only normal recurring adjustments) necessary to state fairly the financial information set forth therein in accordance with GAAP. Certain prior period amounts in the condensed consolidated financial statements and the accompanying notes have been reclassified to conform to the current period’s presentation. The year-end condensed consolidated balance sheet data provided herein were derived from audited financial statements included in the 2020 Form 10-K, but do not include all disclosures required by GAAP. The Company’s quarterly results fluctuate. As a result, the Company believes the results of operations for this interim period presented are not indicative of the results to be expected for any future periods.

Revenue Recognition

Revenue Recognition

Generally, the Company’s revenue contract with a customer exists when goods are shipped, and services (if any) are rendered; and its related invoice is generated. The duration of the contract does not extend beyond the promised goods or services already transferred. The transaction price of each distinct promised product or service specified in the invoice is based on its relative stated standalone selling price. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product to a customer at a point in time. The Company’s shipping terms provide the primary indicator of the transfer of control. The Company’s general shipping terms are F.O.B. shipping point, where title and risk and rewards of ownership transfer at the point when the products leave the Company’s warehouse. The Company recognizes revenue based on the consideration specified in the invoice with a customer, excluding any sales incentives, discounts, and amounts collected on behalf of third parties (i.e., governmental tax authorities). Based on historical experience with the customer, the customer's purchasing pattern and its significant experience selling products, the Company concluded that a significant reversal in the cumulative amount of revenue recognized will not occur when the uncertainty (if any) is resolved (that is, when the total amount of purchases is known). Refer to Note 2 for additional information.

Net Income Per Common Share

Net Income Per Common Share

The Company calculates net income per common share based on the weighted-average number of shares of the Company's common stock outstanding during the period. Potentially dilutive securities are included in the diluted per-share calculations using the treasury stock method for all periods when the effect is dilutive.

Accounting for Leases

Accounting for Leases

The Company has operating and finance leases for certain facilities, equipment, autos and data centers. As an accounting policy for short-term leases, the Company elected to not recognize the right-of-use asset and liability, if, at the commencement date, the lease (1) has a term of 12 months or less and (2) does not include renewal and purchase options that the Company is reasonably certain to exercise. Monthly payments on short-term leases are recognized on the straight-line basis over the full lease term.

Accounting for Stock-Based Compensation

Accounting for Stock-Based Compensation

The Company recognizes stock-based compensation expense related to the estimated fair value of restricted stock awards on a straight-line basis, net of estimated forfeitures, over the requisite service period of the awards, which is generally the vesting term of four years. Stock-based expense related to performance share grants are measured based on grant date fair value and expensed on a graded basis over the service period of the awards, which is generally a performance period of three years. The performance conditions are based on the Company's achievement of revenue growth and return on invested capital over the performance period, and are evaluated for the probability of vesting at each reporting period end with changes in expected results recognized as an adjustment to expense. The assumptions used to calculate the fair value of restricted stock grants are evaluated and revised, as necessary, to reflect market conditions and the Company’s experience.

Equity Investments

Fair Value of Financial Instruments

Fair Value of Financial Instruments

Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified under a three-tier fair valuation hierarchy based on the observability of the inputs available in the market: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and Level 3 inputs are unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The carrying amounts of trade accounts receivable, accounts payable, accrued liabilities and other current liabilities approximate fair value due to the short-term nature of these instruments. The fair value of the Company’s contingent consideration related to acquisitions and equity investment are classified as Level 3 within the fair value hierarchy as it is based on unobserved inputs such as management estimates and entity-specific assumptions and is evaluated on an ongoing basis. The fair value of foreign currency forward contracts, calculated based on Level 1 inputs, was not material as of March 31, 2021.

Derivative Instruments - Foreign Currency Contracts

Derivative Instruments - Foreign Currency Contracts

The Company uses derivative instruments as a risk management tool to mitigate the potential impact of certain market risks. Foreign currency exchange rate risk is the primary market risk the Company manages through the use of derivative instruments, which are accounted for as cash flow hedges under the accounting standards and carried at fair value as other current assets or other current liabilities in the consolidated balance sheets. Net deferred gains and losses related to changes in fair value are included in accumulated other comprehensive loss, a component of shareholders' equity in the consolidated balance sheets, and are reclassified into the line item in the consolidated statement of income in which the hedged items are recorded in the same period the hedged item affects earnings. Changes in fair value of any derivatives that are determined to be ineffective are immediately reclassified from other comprehensive income into earnings. The cash flow impact of the Company's derivative instruments is primarily included in the consolidated statement of cash flows in net cash provided by operating activities. Refer to Note 8.

Cash and Cash Equivalents

Cash and Cash EquivalentsThe Company classifies investments that are highly liquid and have maturities of three months or less at the date of purchase as cash equivalents. As of March 31, 2021 and 2020, the value of these investments were $28.2 million and $0.1 million, respectively, consisting of U.S. Treasury securities and money market funds. The value of the investments is based on cost, which approximates fair value based on Level 1 inputs

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy

Current Estimated Credit Loss - Allowance for doubtful accounts

The Company maintains an allowance for doubtful accounts receivable for estimated future expected credit losses resulting from customers' failure to make payments on its accounts receivable. The Company determines the estimate of the allowance for doubtful accounts receivable by considering several factors, including (1) specific information on the financial condition and the current creditworthiness of customers, (2) credit rating, (3) payment history and historical experience, (4) aging of the accounts receivable, and (5) reasonable and supportable forecasts about collectability. The Company also reserves 100% of the amounts deemed uncollectible due to a customer's deteriorating financial condition or bankruptcy.

Every quarter, the Company evaluates the customer group using the accounts receivable aging report and its best judgment when considering changes in customers' credit ratings, level of delinquency, customers' historical payments and loss experience, current market and economic conditions, and expectations of future market and economic conditions.

The changes in the allowance for doubtful accounts receivable for the year ended March 31, 2021 are outlined in the table below:

	Balance at		Amounts		Balance at
(in thousands)	December 31, 2020		Charged to Expense	Write-Offs1	March 31, 2021
Allowance for Doubtful Accounts	$	2,110	(215)	119	$	1,776

1Amount is net of recoveries and the effect of foreign currency fluctuations for the year ended March 31, 2021.

Income Taxes

Income Taxes

The Company uses an estimated annual tax rate to measure the tax benefit or tax expense recognized in each interim period.

Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted

Accounting Standards Not Yet Adopted

In March 2020, the FASB issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848). ASU 2020-04 provides optional guidance to ease the potential burden in accounting for reference rate reform on financial reporting in response to the risk of cessation of the London Interbank Offered Rate (“LIBOR”) on December 31, 2021. The ASU allows the option to account for and present a modification that meets the scope of the standard as an event that does not require contract remeasurement at the modification date or reassessment of a previous accounting determination required under the relevant topic or subtopic. Generally, the ASU allows hedge accounting to continue if the hedge was highly effective or met other standards prior to reference rate reform. Entities are permitted to apply the amendments to all contracts, cash flow and net investment hedge relationships that exist as of March 12, 2020. The relief provided in this ASU is only available for a limited time, generally through December 31, 2022. The Company's Credit Facility maturing on July 23, 2022 bears interest using LIBOR plus an applicable margin. We do not expect a material impact to our consolidated operating results, financial position or cash flows from the transition from LIBOR to alternative reference interest rates, but we will continue to monitor the impact of this transition until it is completed.

All issued and effective accounting standards during the first quarter of 2021 were determined to be not relevant or material to the Company.

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Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts Receivable, Allowance for Credit Loss

The changes in the allowance for doubtful accounts receivable for the year ended March 31, 2021 are outlined in the table below:

	Balance at		Amounts		Balance at
(in thousands)	December 31, 2020		Charged to Expense	Write-Offs1	March 31, 2021
Allowance for Doubtful Accounts	$	2,110	(215)	119	$	1,776

1Amount is net of recoveries and the effect of foreign currency fluctuations for the year ended March 31, 2021.

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Net income Per Share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

e following table reconciles basic net income per share of the Company's common stock to diluted net income per share for the three months ended March 31, 2021 and 2020, respectively:

	Three Months Ended    March 31,
(in thousands, except per share amounts)	2021		2020
Net income available to common stockholders	$	50,387	$	36,826
Basic weighted-average shares outstanding	43,379		44,099
Dilutive effect of potential common stock equivalents — restricted stock units	233		187
Diluted weighted-average shares outstanding	43,612		44,286
Net income per common share:
Basic	$	1.16	$	0.84
Diluted	$	1.16	$	0.83

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Trade Accounts Receivable, Net (Tables)

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Schedule of trade accounts receivable, net

Trade accounts receivable at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Trade accounts receivable	$	232,646	$	174,853	$	170,001
Allowance for doubtful accounts	(1,776)		(2,761)		(2,110)
Allowance for sales discounts and returns	(3,669)		(3,356)		(2,763)
	$	227,201	$	168,736	$	165,128

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Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of carrying values of inventories

Inventories at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Raw materials	$	94,340	$	89,903	$	95,777
In-process products	22,678		19,464		21,803
Finished products	179,622		146,353		166,162
	$	296,640	$	255,720	$	283,742

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Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment, net, at the dates indicated consisted of the following: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
Land	$	28,280	$	27,964	$	28,553
Buildings and site improvements	201,283		193,971		203,421
Leasehold improvements	7,023		4,832		7,091
Machinery, equipment, and software	385,195		354,931		372,923
	621,781		581,698		611,988
Less accumulated depreciation and amortization	(382,907)		(351,776)		(377,460)
	238,874		229,922		234,528
Capital projects in progress	16,810		17,019		20,656
	$	255,684	$	246,941	$	255,184

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Goodwill and Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill, by segment

Goodwill at the dates indicated was as follows: 

	At March 31,				At December 31,
(in thousands)	2021		2020		2020
North America	$	96,340	$	95,988	$	96,311
Europe	35,684		34,445		38,059
Asia/Pacific	1,453		1,166		1,474
Total	$	133,477	$	131,599	$	135,844

Schedule of net intangible assets, by segment

Intangible assets, net, at the dates indicated were as follows: 

	At March 31, 2021
	Gross				Net
	Carrying		Accumulated		Carrying
(in thousands)	Amount		Amortization		Amount
North America	$	40,785	$	(23,724)	$	17,061
Europe	26,347		(18,349)		7,998
Total	$	67,132	$	(42,073)	$	25,059

	At March 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	33,755	$	(20,039)	$	13,716
Europe	25,410		(15,672)		9,738
Total	$	59,165	$	(35,711)	$	23,454

	At December 31, 2020
	Gross				Net
(in thousands)	Carrying Amount		Accumulated Amortization		Carrying Amount
North America	$	40,786	$	(22,697)	$	18,089
Europe	26,341		(17,630)		8,711
Total	$	67,127	$	(40,327)	$	26,800

Schedule of estimated future amortization of intangible assets

At March 31, 2021, the estimated future amortization of definite-lived intangible assets was as follows: 

(in thousands)
Remaining nine months of 2021	$	4,619
2022	4,223
2023	3,390
2024	2,343
2025	2,086
2026	1,483
Thereafter	6,300
	$	24,444

Changes in the carrying amount of goodwill and intangible assets

The changes in the carrying amount of goodwill and intangible assets for the three months ended March 31, 2021, were as follows: 

			Intangible
(in thousands)	Goodwill		Assets
Balance at December 31, 2020	$	135,844	$	26,800
Reclassifications	(106)		348
Amortization	—		(1,746)
Foreign exchange	(2,261)		(343)
Balance at March 31, 2021	$	133,477	$	25,059

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Leases (Tables)

3 Months Ended

Mar. 31, 2021

Lease, Cost [Abstract]

Balance Sheet Information

The following table provides a summary of leases included on the condensed consolidated balance sheets March 31, 2021, 2020 and December 31, 2020, condensed consolidated statements of earnings, and condensed consolidated statements of cash flows as of the three months and three months ended March 31, 2021 and 2020:

	Condensed Consolidated Balance Sheets Line Item	March 31,				December 31,
(in thousands)		2021		2020		2020
Operating leases
Assets
Operating leases	Operating lease right-of-use assets	$	44,236	$	33,725	$	45,792
Liabilities
Operating - current	Accrued expenses and other current liabilities	$	8,941	$	7,603	$	9,143
Operating - noncurrent	Operating lease liabilities	35,810		26,084		37,199
Total operating lease liabilities		$	44,751	$	33,687	$	46,342
Finance leases
Assets
Property and equipment, gross	Property, plant and equipment, net	$	3,569	$	3,566	$	3,569
Accumulated amortization	Property, plant and equipment, net	(3,188)		(2,903)		(3,112)
Property and equipment, net	Property, plant and equipment, net	$	381	$	663	$	457
Liabilities
Other current liabilities	Accrued expenses and other current liabilities	$	193	$	1,125	$	384
Other long-term liabilities	Deferred income tax and other long-term liabilities	—		6		—
Total finance lease liabilities		$	193	$	1,131	$	384

Lease, Cost

The components of lease expense were as follows:

	Condensed Consolidated Statements of Operations Line Item	Three Months Ended March 31,
(in thousands)		2021		2020
Operating lease cost	General administrative expenses and      cost of sales	$	2,859	$	2,492
Finance lease cost:
Amortization of right-of-use         assets	General administrative expenses	$	216	$	218
Interest on lease liabilities	Interest expense, net	2		11
Total finance lease		$	218	$	229

Other information

Supplemental cash flow information related to leases as follows:

	Three Months Ended March 31,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	2,805	$	2,418
Finance cash flows for finance leases	290		290
Operating right-of-use assets obtained in exchange for lease      obligations during the current period	786		2,068

The following table summarizes the Company's lease terms and discount rates as of March 31, 2021 and 2020:

Weighted-average remaining lease terms (in years):	2021		2020
Operating leases	7.13		6.38
Finance leases	0.25		1.19
Weighted-average discount rate:
Operating leases	5.28	%	5.36	%
Finance leases	3.50	%	3.24	%

Operating Lease, Liability, Maturity

The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2021:

(in thousands)	Finance Leases		Operating Leases
Remaining nine months of 2021	$	193	$	8,089
2022	—		9,102
2023	—		6,994
2024	—		5,449
2025	—		5,046
Thereafter	—		19,066
Total lease payments	193		53,746
Less: Present value discount	—		(8,995)
Total lease liabilities	$	193	$	44,751

Finance Lease, Liability, Maturity

The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2021:

(in thousands)	Finance Leases		Operating Leases
Remaining nine months of 2021	$	193	$	8,089
2022	—		9,102
2023	—		6,994
2024	—		5,449
2025	—		5,046
Thereafter	—		19,066
Total lease payments	193		53,746
Less: Present value discount	—		(8,995)
Total lease liabilities	$	193	$	44,751

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Schedule of performance of reportable segments

The following tables illustrate certain measurements used by management to assess the performance of its reportable segments as of or for the following periods: 

	Three Months Ended March 31,
(in thousands)	2021		2020
Net Sales
North America	$	300,564	$	249,050
Europe	44,296		32,732
Asia/Pacific	2,782		1,886
Total	$	347,642	$	283,668
Sales to Other Segments*
North America	$	696	$	640
Europe	1,609		1,254
Asia/Pacific	8,527		4,813
Total	$	10,832	$	6,707
Income (Loss) from Operations
North America	$	69,410	$	53,561
Europe	2,291		(1,670)
Asia/Pacific	425		(604)
Administrative and all other	(3,743)		(1,937)
Total	$	68,383	$	49,350

*    Sales to other segments are eliminated in consolidation.

					At
	At March 31,				December 31,
(in thousands)	2021		2020		2020
Total Assets
North America	$	1,125,887	$	1,153,775	$	1,059,967
Europe	198,363		163,476		198,647
Asia/Pacific	31,831		27,919		32,754
Administrative and all other	(61,354)		(146,922)		(58,799)
Total	$	1,294,727	$	1,198,248	$	1,232,569

Schedule of net sales distributed by product group

While the Company manages its business by geographic segment, the following table illustrates the distribution of the Company’s net sales by product group as additional information for the following periods:

	Three Months Ended March 31,
(in thousands)	2021		2020
Wood construction products	$	301,578	$	242,520
Concrete construction products	45,523		41,012
Other	541		136
Total	$	347,642	$	283,668

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Basis of Presentation - Accounting for Stock-based Compensation (Details)	3 Months Ended
	Mar. 31, 2021
Maximum
Stock-Based Compensation
Vesting period	3 years

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Basis of Presentation - Dividend Declaration (Details) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Dividend Declaration [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23

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Basis of Presentation - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Cash and Cash Equivalents [Abstract]
Fair value of cash and cash equivalents	$ 28,200	$ 100

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Basis of Presentation - Accounts Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts Receivable, Allowance for Credit Loss	$ 1,776	$ 2,110
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(215)
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 119

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Basis of Presentation - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating lease right-of-use assets	$ 44,236	$ 45,792	$ 33,725
Total operating lease liabilities	$ 44,751	$ 46,342	$ 33,687

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Revenue from Contract with Customer (Details) - ASC 606	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Wood construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales	87.00%	86.00%
Concrete construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales	13.00%	14.00%
Other
Disaggregation of Revenue [Line Items]
Percentage of net sales	1.00%

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Net income Per Share - Reconciliation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reconciliation of basic earnings per share ("EPS") to diluted EPS
Net income available to common stockholders	$ 50,387	$ 36,826
Basic weighted-average shares outstanding	43,379	44,099
Dilutive effect of potential common stock equivalents — restricted stock units	233	187
Diluted weighted-average shares outstanding	43,612	44,286
Earnings per common share:
Basic	$ 1.16	$ 0.84
Diluted	$ 1.16	$ 0.83

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Stockholders' Equity - Shares Repurchases (Details)	Mar. 31, 2021 shares
Equity [Abstract]
Treasury stock (in shares)	150,974

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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Stock-Based Compensation
Increase in deferred compensation expense	$ 6.2
Unrecognized compensation costs related to unvested share-based compensation arrangements	$ 24.0
Weighted-average period for recognition of unrecognized stock-based compensation expense	2 years 7 months 6 days
Restricted Stock Units
Stock-Based Compensation
Awarded (in shares)	133,424
Weighted average granted date fair value (in dollars per share)	$ 100.26
Vesting period	3 years
Employees
Stock-Based Compensation
Stock-based compensation expense	$ 6.5	$ 0.3
Employees | Restricted Stock Units
Stock-Based Compensation
Vesting period	4 years

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Trade Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Receivables [Abstract]
Trade accounts receivable	$ 232,646	$ 170,001	$ 174,853
Allowance for doubtful accounts	(1,776)	(2,110)	(2,761)
Allowance for sales discounts and returns	(3,669)	(2,763)	(3,356)
Trade accounts receivable, net	$ 227,201	$ 165,128	$ 168,736

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Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 94,340	$ 95,777	$ 89,903
In-process products	22,678	21,803	19,464
Finished products	179,622	166,162	146,353
Total inventories	$ 296,640	$ 283,742	$ 255,720

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Property, Plant and Equipment
Property, plant and equipment, gross	$ 621,781	$ 611,988	$ 581,698
Less accumulated depreciation and amortization	(382,907)	(377,460)	(351,776)
Property, plant and equipment excluding capital projects in progress, net	238,874	234,528	229,922
Capital projects in progress	16,810	20,656	17,019
Property, plant and equipment, net	255,684	255,184	246,941
Land
Property, Plant and Equipment
Property, plant and equipment, gross	28,280	28,553	27,964
Buildings and site improvements
Property, Plant and Equipment
Property, plant and equipment, gross	201,283	203,421	193,971
Leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	7,023	7,091	4,832
Machinery, equipment, and software
Property, Plant and Equipment
Property, plant and equipment, gross	$ 385,195	$ 372,923	$ 354,931

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Goodwill and Intangible Assets, Net, Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Carrying amount of goodwill by reportable segment
Goodwill	$ 133,477	$ 135,844	$ 131,599
North America
Carrying amount of goodwill by reportable segment
Goodwill	96,340	96,311	95,988
Europe
Carrying amount of goodwill by reportable segment
Goodwill	35,684	38,059	34,445
Asia/Pacific
Carrying amount of goodwill by reportable segment
Goodwill	$ 1,453	$ 1,474	$ 1,166

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Goodwill and Intangible Assets, Net, Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 1,746	$ 1,500
Acquired finite-lived intangible assets, weighted average useful life	6 years 3 months 18 days
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	$ 67,132	59,165	$ 67,127
Accumulated amortization	(42,073)	(35,711)	(40,327)
Net carrying amount	25,059	23,454	26,800
North America
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	40,785	33,755	40,786
Accumulated amortization	(23,724)	(20,039)	(22,697)
Net carrying amount	17,061	13,716	18,089
Europe
Changes in gross carrying amount of finite-lived intangible assets
Gross carrying amount	26,347	25,410	26,341
Accumulated amortization	(18,349)	(15,672)	(17,630)
Net carrying amount	$ 7,998	$ 9,738	$ 8,711

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Goodwill and Intangible Assets, Net, Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Indefinite-lived Intangible Assets [Line Items]
Amortization of intangibles	$ 1,746	$ 1,500
Trade Names
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 600

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Goodwill and Intangible Assets, Net, Estimated Future Amortization (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining nine months of 2021	$ 4,619
2022	4,223
2023	3,390
2024	2,343
2025	2,086
2026	1,483
Thereafter	6,300
Total	$ 24,444
Acquired finite-lived intangible assets, weighted average useful life	6 years 3 months 18 days

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Goodwill and Intangible Assets, Net, Carrying Amount of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Goodwill
Balance at the beginning of the period	$ 135,844
Reclassifications	(106)
Foreign exchange	(2,261)
Balance at the end of the period	133,477	$ 131,599
Intangible Assets
Balance at the beginning of the period	26,800
Reclassifications	348
Amortization	(1,746)	(1,500)
Foreign exchange	(343)
Balance at the end of the period	$ 25,059	$ 23,454

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Leases - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Lessee, Lease, Description [Line Items]
Total finance lease liabilities	$ 193	$ 384	$ 1,131
Option to extend term	5 years
Minimum | Cisco Systems Capital Corporation [Member]
Lessee, Lease, Description [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.89%
Maximum | Cisco Systems Capital Corporation [Member]
Lessee, Lease, Description [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.50%

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Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 44,236	$ 45,792	$ 33,725
Operating - current	8,941	9,143	7,603
Operating - noncurrent	35,810	37,199	26,084
Total operating lease liabilities	44,751	46,342	33,687
Property and equipment, gross	3,569	3,569	3,566
Accumulated amortization	(3,188)	(3,112)	(2,903)
Property and equipment, net	381	457	663
Other current liabilities	193	384	1,125
Other long-term liabilities	0	0	6
Total finance lease liabilities	$ 193	$ 384	$ 1,131

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Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 2,859	$ 2,492
Amortization of right-of-use assets	216	218
Interest on lease liabilities	2	11
Total finance lease	$ 218	$ 229

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Leases - Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lease, Cost [Abstract]
Operating cash flows for operating leases	$ 2,805	$ 2,418
Finance cash flows for finance leases	290	290
Operating right-of-use assets obtained in exchange for lease obligations during the current period	$ 786	$ 2,068

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Leases - Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remaining nine months of 2021	$ 193
2022	0
2023	0
2024	0
2025	0
Thereafter	0
Finance Lease, Liability, Payment, Due	193
Finance Lease, Liability, Undiscounted Excess Amount	0
Total finance lease liabilities	193	$ 384	$ 1,131
Operating Leases
Remaining nine months of 2021	8,089
2022	9,102
2020	6,994
2021	5,449
2025	5,046
Thereafter	19,066
Total lease payments	53,746
Less: Present value discount	(8,995)
Total operating lease liabilities	$ 44,751	$ 46,342	$ 33,687

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Leases - Lease Terms and Discount Rates (Details)	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	7 years 1 month 17 days	6 years 4 months 17 days
Finance Lease, Weighted Average Remaining Lease Term	3 months	1 year 2 months 8 days
Operating Lease, Weighted Average Discount Rate, Percent	5.28%	5.36%
Finance Lease, Weighted Average Discount Rate, Percent	3.50%	3.24%

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Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt
Remaining borrowing capacity	$ 300.0
Long-term Line of Credit	0.0	$ 0.0	$ 150.2
Line of Credit
Debt
Credit facility, total available credit	$ 304.0

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Commitments and Contingencies (Details) $ in Millions	Nov. 20, 2017 USD ($)
Nishimura v. Gentry Homes, Ltd
Loss Contingencies [Line Items]
Settlement amount	$ 90

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Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Information
Number of reportable segments | segment	3
Net sales	$ 347,642	$ 283,668
Income (Loss) from Operations	68,383	49,350
Total Assets	1,294,727	1,198,248	$ 1,232,569
Cash and cash equivalent	257,428	301,741	274,639
Intersegment elimination
Segment Information
Net sales	10,832	6,707
Administrative and all other
Segment Information
Income (Loss) from Operations	(3,743)	(1,937)
Total Assets	(61,354)	(146,922)	(58,799)
Cash and cash equivalent	183,200	248,700	199,800
North America
Segment Information
Net sales	300,564	249,050
Income (Loss) from Operations	69,410	53,561
Total Assets	1,125,887	1,153,775	1,059,967
North America | Intersegment elimination
Segment Information
Net sales	696	640
Europe
Segment Information
Net sales	44,296	32,732
Income (Loss) from Operations	2,291	(1,670)
Total Assets	198,363	163,476	198,647
Europe | Intersegment elimination
Segment Information
Net sales	1,609	1,254
Asia/Pacific
Segment Information
Net sales	2,782	1,886
Income (Loss) from Operations	425	(604)
Total Assets	31,831	27,919	$ 32,754
Asia/Pacific | Intersegment elimination
Segment Information
Net sales	$ 8,527	$ 4,813

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Segment Information (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net sales and long-lived assets by geographical area
Net sales	$ 347,642	$ 283,668
Wood construction products
Net sales and long-lived assets by geographical area
Net sales	301,578	242,520
Concrete construction products
Net sales and long-lived assets by geographical area
Net sales	45,523	41,012
Other
Net sales and long-lived assets by geographical area
Net sales	541	136
North America
Net sales and long-lived assets by geographical area
Net sales	$ 300,564	$ 249,050

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Segment Information (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Concentration Risk [Line Items]
Cash and cash equivalents	$ 257,428	$ 274,639	$ 301,741
Administrative and all other
Concentration Risk [Line Items]
Cash and cash equivalents	$ 183,200	$ 199,800	$ 248,700

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	May 04, 2021	Mar. 31, 2021	Mar. 31, 2020
Subsequent Event [Line Items]
Cash dividends declared per common share (in dollars per share)		$ 0.23	$ 0.23
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.25
Dividends	$ 10,900

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Derivative Instruments and Hedging Activities (Details) - 3 months ended Mar. 31, 2021 ¥ in Millions, $ in Millions	USD ($)	CNY (¥)	USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount | ¥		¥ 62.2
Proceeds from Sale of Derivative Instruments	$ 9.1
Other Current Assets | Foreign Exchange Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net			$ 0.4