The Company continually evaluates potential acquisitions that either strategically fit within the Company’s existing portfolio or expand the Company’s portfolio into new product lines or adjacent markets. The Company has completed a number of acquisitions that have been accounted for as business combinations under ASC 805, Business Combinations, and have resulted in the recognition of goodwill in the Company’s financial statements. This goodwill includes the know-how of the assembled workforce, the ability of the workforce to further improve technology and product offerings, customer relationships and the expected cash flows resulting from

these efforts. Goodwill may also include expected synergies resulting from the complementary strategic fit these businesses bring to existing operations.

Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives and the expected future cash flows and related discount rates, can materially impact the Company’s results of operations. Significant inputs used for the model included the amount of cash flows, the expected period of the cash flows and the discount rates. Significant estimation was required by management in determining the fair value of the customer relationship intangible assets, deferred revenue and contingent consideration liabilities. The significant estimation is primarily due to the judgmental nature of the inputs to the valuation models used to measure the fair value of these intangible assets, deferred revenue and contingent consideration liabilities, as well as the sensitivity of the respective fair values to the underlying significant assumptions. The Company used the income approach to measure the fair value of these intangible assets, a discounted cash flow approach for deferred revenue and a Monte Carlo simulation model to measure the fair value of the contingent consideration liabilities. The significant assumptions used to estimate the fair value of the intangible assets, deferred revenue and contingent consideration liabilities included forecasted revenues from existing customers, existing customer attrition rates, estimated costs required to fulfill the deferred revenue obligation and forecasted revenues for the contingent consideration earnout period. When estimating the significant assumptions to be used in the valuation the Company includes a consideration of current industry information, market and economic trends, historical results of the acquired business, nature of the performance obligations associated with the deferred revenue and other relevant factors. These significant assumptions are forward-looking and could be affected by future economic and market conditions. The valuation of the contingent consideration was derived using estimates of the probability of achievement within specified time periods based on projections of future revenue metrics per the terms of the applicable agreements. These include estimates of the Company’s assessment of the probability of meeting such results, with the probability-weighted earn-out using a Monte Carlo Simulation Model then discounted to estimate fair value. Fair value is estimated using the probability weighted cash flow estimate closer to the measurement date. The various operating performance measures included in these contingent consideration agreements primarily relate to product revenue.

The business acquisitions discussed below are included in the Company’s results of operations from their respective dates of acquisition.

During the nine months ended September 30, 2021, the Company acquired Red Sky Technologies Inc. and xMatters Holdings, Inc. These acquisitions were not material and neither the investment in the assets nor the results of operations of these acquisitions were significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not required to be presented.

On April 6, 2021, the Company and xMatters Holdings, Inc. (“xMatters”) signed a definitive agreement pursuant to which the Company agreed to purchase all of the issued and outstanding shares of stock of xMatters. This acquisition closed on May 7, 2021. The Company purchased all of the issued and outstanding shares of stock of xMatters for a base consideration of $242.6 million. The Company paid $178.1 million in cash and issued 555,332 newly issued shares of the Company’s common stock at closing. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $116.12 per share. The Company acquired xMatters for its service reliability platforms to enhance the Company’s CEM suite of solutions as well as market penetration and customer reach.

As the Company finalizes its estimation of the fair value of the assets acquired and liabilities assumed, additional adjustments may be recorded during the measurement period (a period not to exceed 12 months). The initial accounting is incomplete as of September 30, 2021 for the acquired assets and liabilities as the Company is currently in the process of completing the assessment of the tax attributes of the business combination. The finalization of the acquisition accounting valuation assessment may result in a change in the valuation of the deferred tax assets and liabilities which could have a material impact on the Company’s results of operations and financial position.

The following table summarizes the preliminary estimated fair value of the assets acquired and the liabilities assumed, which were recorded as of the acquisition date, as well as the aggregate consideration for the acquisition of xMatters made by the Company (in thousands):

	xMatters
Assets acquired
Accounts receivable	$	6,716
Property and equipment		1,458
Trade names		8,200
Acquired technology		8,390
Customer relationships		78,940
Goodwill		170,437
Other assets		5,433
Total assets acquired		279,574
Liabilities assumed
Accounts payable		1,164
Accrued expenses		5,517
Deferred revenue		34,421
Deferred tax liabilities		3,436
Other liabilities		5,056
Net assets acquired	$	229,980
Consideration paid
Cash paid, net of cash acquired	$	165,498
Fair value of common stock issued		64,482
Total	$	229,980

The weighted average useful life of all identified acquired intangible assets is 8.13 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 9.0 years and 5.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.

The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of xMatters’ products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of xMatters support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the xMatters acquisition is not deductible for income tax purposes.

For the nine months ended September 30, 2021, the Company incurred transaction costs of $1.5 million in connection with the xMatters acquisition, of which $0.7 million was expensed during the nine months ended September 30, 2021 and included in general and administrative expenses.

On January 15, 2021, the Company entered into a Stock Purchase Agreement with Red Sky Technologies Inc. pursuant to which the Company purchased all of the issued and outstanding shares of stock of RedSky for a base consideration of $55.4 million, net of cash acquired. The Company paid $32.4 million in cash, net of cash acquired, and issued 162,820 newly issued shares of the Company’s common stock at closing. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $141.46 per share. In addition to the base purchase price, there was also a potential contingent payment of up to $30 million that was eligible to be earned by the sellers based on certain revenue targets through the contractual measurement period. At the date of the acquisition, the Company preliminarily assessed the probability of RedSky meeting the revenue metrics through the contractual measurement period and recorded a $9.1 million preliminary fair value of contingent consideration as part of the purchase price allocation. During the three months ended September 30, 2021, the Company recognized a decrease in the fair value of RedSky’s contingent consideration obligation in general and administrative expenses in the consolidated statements of operations in the amount of $8.2 million. During the three months ended September 30, 2021, the Company paid $0.4 million in cash and issued 4,058 shares of the Company’s common stock to settle RedSky’s contingent consideration liability. The Company acquired RedSky for its E911 incident response solutions platform to enhance the Company’s CEM suite of solutions as well as market penetration and customer reach.

2021 for the acquired assets and liabilities as the Company is currently in the process of completing the assessment of the tax attributes of the business combination. The finalization of the acquisition accounting valuation assessment may result in a change in the valuation of the deferred tax assets and liabilities which could have a material impact on the Company’s results of operations and financial position.

	RedSky
Assets acquired
Accounts receivable	$	2,926
Other assets		242
Property and equipment		18
Trade names		2,230
Acquired technology		3,590
Customer relationships		20,000
Goodwill		49,508
Total assets acquired		78,514
Liabilities assumed
Accounts payable		233
Accrued expenses		773
Deferred revenue		5,866
Deferred tax liabilities		7,048
Other liabilities		26
Net assets acquired	$	64,568
Consideration paid
Cash paid, net of cash acquired	$	32,401
Fair value of common stock issued		23,032
Contingent consideration		9,135
Total	$	64,568

The weighted average useful life of all identified acquired intangible assets is 7.73 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 9.0 years and 4.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.

The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of RedSky’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of RedSky support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the RedSky acquisition is not deductible for income tax purposes.

For the nine months ended September 30, 2021, the Company incurred transaction costs of less than $0.1 million in connection with the RedSky acquisition, which were expensed as incurred and included in general and administrative expenses.

During the year ended December 31, 2020, the Company acquired Connexient, Inc., CNL Software Limited, One2Many Group B.V., Techwan SA and SnapComms Limited. These acquisitions were not material individually or on a consolidated basis. Additionally, neither the investment in the assets nor the results of operations of these acquisitions were significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not required to be presented.

On February 7, 2020, the Company entered into a Stock Purchase Agreement with Connexient, Inc. (“Connexient”) pursuant to which the Company purchased all of the issued and outstanding shares of stock of Connexient for a base consideration of $20.2 million. The Company paid $11.5 million in cash at closing and paid the remaining purchase price with 96,611 newly issued shares of the Company’s common stock. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $93.32 per share. In addition to the base purchase price, there was also a potential contingent payment of up to $6.0 million that was eligible to be earned by the sellers based on fiscal year 2020 revenue metrics. At December 31, 2020, it was determined that Connexient would not meet the fiscal year 2020 revenue metric threshold. The Company acquired Connexient for its strategic technology assets to enhance the Company’s CEM suite of solutions to broaden support for Internet of Things (“IoT”) applications as well as market penetration and customer reach.

On February 25, 2020, the Company entered into a Stock Purchase Agreement with CNL Software Limited (“CNL Software”) for a base consideration of approximately $35.7 million. The Company paid approximately $19.8 million in cash at closing and paid the remaining purchase price with 153,217 newly issued shares of the Company’s common stock. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $104.10 per share. The Company acquired CNL Software for its strategic technology assets to enhance the Company’s CEM suite of solutions to broaden support for IoT applications as well as market penetration and customer reach.

On March 19, 2020, the Company entered into a Stock Purchase Agreement with One2Many Group B.V. pursuant to which the Company purchased all of the issued and outstanding shares of stock of one2many for a base consideration of $13.1 million. The Company paid $5.5 million in cash at closing, acquired purchase liabilities of $2.0 million and paid the remaining purchase price with 52,113 newly issued shares of the Company’s common stock. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $104.95 per share. In addition to the base purchase price, there was also a potential contingent payment of up to approximately $15.0 million that was eligible to be earned by the sellers based on revenue metrics during the period of March 1, 2020 through February 28, 2021. The potential contingent payment included an amount payable to the Company if a certain revenue threshold is not met during the period of March 1, 2020 through February 28, 2021. At the date of the acquisition, the Company preliminarily assessed the probabilities of one2many meeting the revenue metrics during the period of March 1, 2020 through February 28, 2021 and recorded a $2.2 million initial fair value of contingent consideration as part of the purchase price allocation. During the three and nine months ended September 30, 2021, the Company recognized in general and administrative expenses in the condensed consolidated statement of operations an increase in the fair value of one2many’s contingent consideration obligation in the amount of $1.1 million and $0.4 million, respectively. During the three months ended September 30, 2021, the Company paid €4.1 million in cash and issued 41,668 shares of the Company’s common stock to settle one2many’s contingent consideration liability. The Company acquired one2many for its cell broadcast technology to enhance the Company’s public warning applications as well as market penetration and customer reach.

On May 27, 2020, the Company entered into a Stock Purchase Agreement with Techwan SA pursuant to which the Company purchased all of the issued and outstanding shares of stock of Techwan for a base consideration of $15.5 million. The Company paid $9.4 million in cash at closing, acquired purchase liabilities of $0.1 million and paid the remaining purchase price with 38,425 newly issued shares of the Company’s common stock. In addition, in accordance with the Stock Purchase Agreement, 6,779 shares of the Company’s common stock were reserved and are expected to be issued to the sellers in November 2021 subject to the provisions in the Stock Purchase Agreement. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $132.05 per share. In addition to the base purchase price, there was also a potential contingent payment of up to approximately $7.0 million that was eligible to be earned by the sellers based on revenue metrics during the period of April 1, 2020 through March 31, 2021. At the date of the acquisition, the Company preliminarily assessed the probabilities of Techwan meeting the revenue metrics during the period of April 1, 2020 through March 31, 2021 and recorded a $2.0 million initial fair value of contingent consideration as part of the purchase price allocation. During the three months ended March 31, 2021, the Company determined that Techwan did not meet the revenue metrics during the period of April 1, 2020 through March 31, 2021. The Company acquired Techwan for its strategic technology assets to enhance the Company’s CEM suite of solutions as well as market penetration and customer reach.

The following table summarizes the estimated fair value of the assets acquired and the liabilities assumed, which were recorded as of the acquisition date, as well as the aggregate consideration for the acquisition of Techwan made by the Company (in thousands):

	Techwan
Assets acquired
Accounts receivable	$	921
Other current assets		235
Acquired technology		1,160
Trade names		580
Customer relationships		5,100
Goodwill		12,678
Other assets		254
Total assets acquired		20,928
Liabilities assumed
Accrued expenses		673
Deferred revenue		1,190
Deferred tax liabilities		838
Other current liabilities		927
Net assets acquired	$	17,300
Consideration paid
Cash consideration, net of cash acquired	$	9,301
Fair value of common stock issued		5,074
Acquisition-related deferred common stock consideration		895
Contingent consideration		2,030
Total	$	17,300

The weighted average useful life of all identified acquired intangible assets is 7.47 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 9.0 years and 3.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.

The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Techwan’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of Techwan support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the Techwan acquisition is not deductible for income tax purposes.

During the year ended December 31, 2020, the Company incurred transaction costs of $0.2 million in connection with the Techwan acquisition, which were expensed as incurred and included in general and administrative expenses.

On August 4, 2020, the Company entered into a Stock Purchase Agreement with SnapComms Limited pursuant to which the Company purchased all of the issued and outstanding shares of stock of SnapComms for a base consideration of $34.4 million. The Company paid $13.6 million in cash and issued 121,858 newly issued shares of the Company’s common stock at closing. On the date of this acquisition, the average price of the Company’s common stock on the Nasdaq Global Market was $145.13 per share. In August 2021, the Company paid deferred consideration of approximately New Zealand $2.5 million in cash and issued 12,390 shares of the Company’s common stock. In addition to the base purchase price, there was also a potential contingent payment of up to approximately $5.0 million that was eligible to be earned by the sellers based on revenue metrics during the period of April 1, 2020 through March 31, 2021. At the date of the acquisition, the Company preliminarily assessed the probability of SnapComms meeting the revenue metrics during the period of April 1, 2020 through March 31, 2021 and recorded a $2.0 million initial fair value of contingent consideration as part of the purchase price allocation. During the six months ended June 30, 2021, the Company recognized in general and administrative expenses in the consolidated statements of operations an increase in the fair value of SnapComms’ contingent consideration obligation in the amount of $0.7 million, respectively. During the three months ended June 30, 2021, the Company issued 6,188 shares of the Company’s common stock to settle SnapComms’ contingent consideration liability. The Company acquired SnapComms for its internal communications software to enhance the Company’s CEM suite of solutions as well as market penetration and customer reach.

	SnapComms
Assets acquired
Accounts receivable	$	1,808
Other current assets		283
Property and equipment		118
Acquired technology		2,300
Trade names		960
Customer relationships		13,300
Goodwill		22,629
Other assets		943
Total assets acquired		42,341
Liabilities assumed
Accrued expenses		503
Deferred revenue		3,165
Deferred tax liabilities		4,960
Other liabilities		742
Net assets acquired	$	32,971
Consideration paid
Cash consideration, net of cash acquired	$	10,090
Fair value of common stock issued		17,685
Acquisition-related deferred consideration		3,149
Contingent consideration		2,047
Total	$	32,971

The weighted average useful life of all identified acquired intangible assets is 7.82 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 9.0 years and 3.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.

The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of SnapComms’ products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of SnapComms support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the SnapComms acquisition is not deductible for income tax purposes.

During the year ended December 31, 2020, the Company incurred transaction costs of $0.1 million in connection with the SnapComms acquisition, which were expensed as incurred and included in general and administrative expenses.