Biggest changeCost of Revenue Cost of revenue consisted of the following for the periods presented (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2022 2021 % Change 2021 2020 % Change Bandwidth fees $ 205,268 $ 209,288 (1.9) % $ 209,288 $ 200,167 4.6 % Co-location fees 197,375 177,950 10.9 177,950 156,275 13.9 Network build-out and supporting services 195,669 157,234 24.4 157,234 134,952 16.5 Payroll and related costs 298,269 276,544 7.9 276,544 262,972 5.2 Acquisition-related costs 4,982 — 100.0 — — — Stock-based compensation, including amortization of prior capitalized amounts 57,146 57,390 (0.4) 57,390 52,863 8.6 Depreciation of network equipment 259,359 226,384 14.6 226,384 167,017 35.5 Amortization of internal-use software 165,751 164,166 1.0 164,166 158,426 3.6 Total cost of revenue $ 1,383,819 $ 1,268,956 9.1 % $ 1,268,956 $ 1,132,672 12.0 % As a percentage of revenue 38.3 % 36.7 % 36.7 % 35.4 % 29 Table of Contents The increases in cost of revenue for 2022 as compared to 2021, and 2021 as compared to 2020, was primarily due to increased network build-out and supporting services, particularly related to increased supporting services for third-party cloud applications, and increased investment in our network in prior years to support traffic growth, which resulted in higher depreciation costs of our network equipment and growth in expenses related to our co-location facilities including energy to power our network.
Biggest changeCost of Revenue Cost of revenue consisted of the following for the periods presented (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2023 2022 % Change 2022 2021 % Change Bandwidth fees $ 228,038 $ 205,268 11.1 % $ 205,268 $ 209,288 (1.9) % Co-location fees 256,062 197,375 29.7 197,375 177,950 10.9 Network build-out and supporting services 215,557 195,669 10.2 195,669 157,234 24.4 Payroll and related costs 325,851 298,269 9.2 298,269 276,544 7.9 Acquisition-related costs 3,190 4,982 (36.0) 4,982 — 100.0 Stock-based compensation, including amortization of prior capitalized amounts 73,786 57,146 29.1 57,146 57,390 (0.4) Depreciation of network equipment 231,500 259,359 (10.7) 259,359 226,384 14.6 Amortization of internal-use software 177,079 165,751 6.8 165,751 164,166 1.0 Total cost of revenue $ 1,511,063 $ 1,383,819 9.2 % $ 1,383,819 $ 1,268,956 9.1 % As a percentage of revenue 39.6 % 38.3 % 38.3 % 36.7 % The increase in cost of revenue for 2023 as compared to 2022 was primarily due to: • co-location fees as a result of investment in Akamai Connected Cloud, particularly as we build out our compute infrastructure to support future growth and scalability; • bandwidth fees to support the increase in traffic served on our network and for traffic served from higher cost regions; 29 Table of Contents • network build-out and supporting services due to our infrastructure investment in Akamai Connected Cloud and costs associated with the transition services agreements to support the migration of customer contracts acquired from Lumen and StackPath; and • payroll and related costs, including stock-based compensation, as a result of headcount growth to support our network, the increased expected achievement of our performance-based compensation plans and higher average equity awards to employees driven by the talent market; additionally, stock-based compensation increased due to the shift in one of our compensation programs from cash-based to stock-based.
In addition, we experience quarterly variations in revenue attributable to, among other things, the nature and timing of software and gaming releases by our customers; whether there are large live sporting or other events or situations that impact the amount of media traffic on our network; the timing of large customer contract renewals; and the frequency and timing of purchases of custom solutions or licensed software.
In addition, we experience quarterly variations in revenue attributable to, among other things, the timing of large customer contract renewals; the frequency and timing of purchases of custom solutions or licensed software; the nature and timing of software and gaming releases by our customers; and whether there are large live sporting or other events or situations that impact the amount of media traffic on our network.
During the periods presented, our average stock price was in excess of $95.10, which is the initial conversion price of our convertible senior notes due in 2025. See further discussion below. (2) May not foot due to rounding. Non-GAAP net income per diluted share is calculated as non-GAAP net income divided by diluted weighted average common shares outstanding.
During the periods presented, our average stock price was in excess of $95.10, which is the initial conversion price of our convertible senior notes due in 2025. See further discussion below. (2) May not foot due to rounding. Non-GAAP net income per diluted share is calculated as non-GAAP net income divided by weighted average diluted common shares outstanding.
We may also resell the licenses or services of third parties. If we are acting as an agent in an arrangement with a customer to provide third party services, the transaction price reflects only the net amount to which we will be entitled, after accounting for payments made to the third party responsible for satisfying the performance obligation.
We may also resell licenses or services of third parties. If we are acting as an agent in an arrangement with a customer to provide third party services, the transaction price reflects only the net amount to which we will be entitled, after accounting for payments made to the third party responsible for satisfying the performance obligation.
We currently have net deferred tax assets, comprised of net operating loss, or NOL, carryforwards, tax credit carryforwards and deductible temporary differences. Our management periodically weighs the positive and negative evidence to determine if it is more-likely-than-not that some or all of the deferred tax assets will be realized.
We currently have net deferred tax assets, comprised of net operating loss ("NOL"), carryforwards, tax credit carryforwards and deductible temporary differences. Our management periodically weighs the positive and negative evidence to determine if it is more-likely-than-not that some or all of the deferred tax assets will be realized.
Capitalized Internal-Use Software Costs We capitalize salaries and related costs, including stock-based compensation, of employees and consultants who devote time to the development of internal-use software development projects, as well as interest expense related to our senior convertible notes. Capitalization begins during the application development stage, once the preliminary project stage has been completed.
Capitalized Internal-Use Software Costs We capitalize salaries and related costs, including stock-based compensation, of employees and consultants who devote time to the development of internal-use software development projects, as well as interest expense related to our convertible senior notes. Capitalization begins during the application development stage, once the preliminary project stage has been completed.
Expenses Our level of profitability is also impacted by our expenses, including direct costs to support our revenue such as bandwidth and co-location costs, which includes energy to power our network. We have observed the following trends related to our profitability in recent years: • Network bandwidth costs represent a significant portion of our cost of revenue.
Expenses Our level of profitability is impacted by our expenses, including direct costs to support our revenue such as bandwidth and co-location costs, which includes energy to power our network. We have observed the following trends related to our profitability in recent years: • Network bandwidth costs represent a significant portion of our cost of revenue.
Consequently, our financial results have been impacted, and management expects they will continue to be impacted, by fluctuations in foreign currency exchange rates. For example, when the local currencies of our foreign subsidiaries weaken, generally our consolidated results stated in U.S. dollars are negatively impacted.
Consequently, our financial results have been impacted, and management expects they will continue to be impacted, by fluctuations in foreign currency exchange rates. For example, when the local currencies of our international subsidiaries weaken, generally our consolidated results stated in U.S. dollars are negatively impacted.
We plan to continue to control costs, including reducing our real estate expenses due to excess capacity created by our FlexBase program, in an effort to manage our operating margins.
However, we plan to continue to control costs, including reducing our real estate expenses due to excess capacity created by our FlexBase program, in an effort to manage our operating margins.
The restructuring charge for this action includes severance and related expenses for certain headcount reductions and software charges for software not yet placed into service that will not be implemented due to this action. In addition to the 2020 action, additional charges were incurred in 2021, related to management’s plans to launch its new FlexBase program in May 2022.
The restructuring charge for this action includes severance and related expenses for certain headcount reductions and software charges for software not yet placed into service that will not be implemented due to this action. In addition to the 2020 action, additional charges were incurred in 2021, related to management’s launch of its new FlexBase program in May 2022.
During 2023, we expect our cost of revenue to increase as compared to 2022, in particular co-location costs, due to investments in our network to support the continued growth of our compute solutions. We plan to continue to focus our efforts on managing our operating margins, including our bandwidth and network build-out costs.
During 2024, we expect our cost of revenue to increase as compared to 2023, in particular our co-location costs, due to investments in our network to support the continued growth of our compute solutions. We plan to continue to focus our efforts on managing our operating margins, including our bandwidth and network build-out costs.
See Note 13 to our consolidated financial statements included elsewhere in this annual report on Form 10-K for further discussion of these indemnification agreements. The fair value of guarantees issued or modified during 2022 and 2021 was determined to be immaterial.
See Note 13 to our consolidated financial statements included elsewhere in this annual report on Form 10-K for further discussion of these indemnification agreements. The fair value of guarantees issued or modified during 2023 and 2022 was determined to be immaterial.
Management believes that these non-GAAP financial measures reflect our ongoing business in a manner that allows for meaningful comparisons and analysis of trends in the business, as they facilitate comparing financial results across accounting periods and to those of peer companies.
Management believes that these non-GAAP financial measures reflect our ongoing business in a manner that allows for meaningful comparisons and analysis of trends in the business, as they facilitate comparison of financial results across accounting periods and to those of our peer companies.
Impairment and Useful Lives of Long-Lived Assets We review our long-lived assets, such as property and equipment, operating lease right-of-use assets and acquired intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable.
Impairment of Long-Lived Assets We review our long-lived assets, such as property and equipment, operating lease right-of-use assets and acquired intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable.
We have assigned the entire balance of goodwill to our one reporting unit. The fair value of the reporting unit was based on our market capitalization as of each of December 31, 2022 and 2021, and it was substantially in excess of the carrying value of the reporting unit at each date.
We have assigned the entire balance of goodwill to our one reporting unit. The fair value of the reporting unit was based on our market capitalization as of each of December 31, 2023 and 2022, and it was substantially in excess of the carrying value of the reporting unit at each date.
Significant Accounting Policies and Estimates See Note 2 to the consolidated financial statements included elsewhere in this annual report on Form 10-K for information regarding recent and newly adopted accounting pronouncements. 42 Table of Contents Application of Critical Accounting Policies and Estimates Overview Our MD&A is based upon our consolidated financial statements, which have been prepared in accordance with GAAP.
Significant Accounting Policies and Estimates See Note 2 to the consolidated financial statements included elsewhere in this annual report on Form 10-K for information regarding recent and newly adopted accounting pronouncements. Application of Critical Accounting Policies and Estimates Overview Our MD&A is based upon our consolidated financial statements, which have been prepared in accordance with GAAP.
Changes in cash, cash equivalents and marketable securities are dependent upon changes in, among other things, working capital items such as accounts receivable, deferred revenue, accounts payable and various accrued expenses, as well as changes in our capital and financial structure due to common stock repurchases, debt repayments and issuances, acquisitions, purchases and sales of marketable securities, cash paid for acquisitions and similar events.
Changes in cash, cash equivalents and marketable securities are dependent upon changes in, among other things, working capital items such as accounts receivable, deferred revenue, accounts payable, various accrued expenses and operating lease obligations, as well as changes in our capital and financial structure due to common stock repurchases, debt repayments and issuances, acquisitions, purchases and sales of marketable securities, cash paid for acquisitions and similar events.
Our estimates are based upon assumptions and judgments about matters that are highly uncertain at the time an accounting estimate is made and applied and require us to assess a range of potential outcomes. Review of Critical Accounting Policies and Estimates Revenue Recognition Our contracts with customers sometimes include promises to transfer multiple services to a customer.
Our estimates are based upon assumptions and judgments about matters that are highly uncertain at the time an accounting estimate is made and applied and require us to assess a range of potential outcomes. 42 Table of Contents Review of Critical Accounting Policies and Estimates Revenue Recognition Our contracts with customers sometimes include promises to transfer multiple services to a customer.
Our estimate of the value of our tax reserves contains assumptions based on past experiences and judgments about the interpretation of statutes, rules and regulations by taxing jurisdictions. It is possible that the costs of the ultimate tax liability or benefit from these matters may be more or less than the amount that we estimated.
Our estimate of the value of our tax reserves contains assumptions based on past experiences and judgments about 44 Table of Contents the interpretation of statutes, rules and regulations by taxing jurisdictions. It is possible that the costs of the ultimate tax liability or benefit from these matters may be more or less than the amount that we estimated.
Management uses non-GAAP financial measures to understand and compare operating results across accounting periods, for financial and operational decision making, for planning and forecasting purposes, to measure executive compensation and to evaluate our financial performance.
Management uses non-GAAP financial measures, in addition to GAAP financial measures, to understand and compare operating results across accounting periods, for financial and operational decision making, for planning and forecasting purposes, to measure executive compensation and to evaluate our financial performance.
The decrease to interest and marketable securities income, net for 2022 as compared to 2021 was due to increased losses associated with the non-qualified deferred compensation plan and lower interest earned on invested cash balances and marketable securities as a result of lower marketable securities balances in 2022 due to the funding of our recent acquisitions.
The decrease to interest and marketable securities income, net for 2022 as compared to 2021 was due to increased losses associated with the non-qualified deferred compensation plan and lower interest earned on invested cash balances and marketable securities as a result of lower marketable securities balances in 2022 due to the funding of our acquisitions of Linode and Guardicore.
We continue to improve our internal-use software and remain disciplined in managing our hardware deployments, particularly for our delivery platform, which enables us to use servers more efficiently. With these efficiencies we have been able to minimize the impact of rising energy costs, particularly in Europe.
We continue to improve our internal-use software and remain disciplined in managing our hardware deployments, particularly for our delivery platform, which enables us to use servers more efficiently. With these efficiencies we have been able to moderate the impact of rising energy costs.
Management also believes that these non-GAAP financial measures enable investors to evaluate our operating results and future prospects in the same manner as management. These non-GAAP financial measures may exclude expenses and gains that may be unusual in nature, infrequent or not reflective of our ongoing operating results.
Management also believes that these non-GAAP financial measures enable investors to evaluate our operating results and future prospects in the same manner as management. These non-GAAP 35 Table of Contents financial measures may exclude expenses and gains that may be unusual in nature, infrequent or not reflective of our ongoing operating results.
We will need to continue to effectively manage our bandwidth costs to maintain current levels of profitability. • Co-location costs are also a significant portion of our cost of revenue.
We will need to continue to effectively manage our bandwidth costs to maintain or improve current levels of profitability. • Co-location costs are also a significant portion of our cost of revenue.
We exclude acquisition-related costs from our non-GAAP financial measures to provide a useful comparison of our operating results to prior periods and to our peer companies because such amounts vary significantly based on the magnitude of our acquisition transactions and do not reflect our core operations. • Restructuring charge – We have incurred restructuring charges from programs that have significantly changed either the scope of the business undertaken by us or the manner in which that business is conducted.
Acquisition-related costs are impacted by the timing and size of the acquisitions, and we exclude acquisition-related costs from our non-GAAP financial measures to provide a useful comparison of operating results to prior periods and to peer companies because such amounts vary significantly based on the magnitude of our acquisition transactions and do not reflect our core operations. • Restructuring charge – We have incurred restructuring charges from programs that have significantly changed either the scope of the business undertaken by us or the manner in which that business is conducted.
We expect to continue to scale our network in the future, which will allow us to continue to effectively manage our co-location costs to maintain current levels of profitability. • Network build-out and supporting service costs represent another significant portion of our cost of revenue.
We expect to continue to scale our network in the future, which we believe will allow us to effectively manage our co-location costs to maintain or improve current levels of profitability. • Network build-out and supporting service costs represent another significant portion of our cost of revenue.
Acquired intangible assets, other than goodwill, are amortized over their estimated useful lives based upon the estimated economic value derived from the related intangible assets. 44 Table of Contents Income Taxes Our provision for income taxes is comprised of a current and a deferred portion.
Acquired intangible assets, other than goodwill, are amortized over their estimated useful lives based upon the estimated economic value derived from the related intangible assets. Income Taxes Our provision for income taxes is comprised of a current and a deferred portion.
These costs include maintenance and supporting services incurred as we continue to build-out our compute infrastructure and maintain our global network, and costs of third-party cloud providers used for some of our operations. We have seen these costs increase in recent years, as a result of our network expansion and increased use of third-party cloud services.
These costs include maintenance and supporting services incurred as we continue to build out our compute infrastructure and maintain our global network, and costs of third-party cloud providers used for some of our operations. We have seen these costs increase in recent years as a result of our network expansion, and particularly the build out of our compute infrastructure.
Refer to Note 19 to the consolidated financial statements included elsewhere in this annual report on Form 10-K for additional information regarding unrecognized tax benefits that, if recognized, would impact the effective income tax rate in the next 12 months.
See "Risk Factors" and refer to Note 19 to the consolidated financial statements included elsewhere in this annual report on Form 10-K for additional information regarding unrecognized tax benefits that, if recognized, would impact the effective income tax rate in the next 12 months.
Fair values determined by Level 3 inputs are based on unobservable data points for the asset or liability. Marketable securities are considered to be impaired when a decline in fair value below cost basis is determined to be other-than-temporary.
Fair values determined by Level 3 inputs are based on unobservable data points for the asset or liability. 43 Table of Contents Marketable securities are considered to be impaired when a decline in fair value below cost basis is determined to be other-than-temporary.
Under GAAP, shares delivered under hedge transactions are not considered offsetting shares in the fully-diluted share calculation until they are delivered. However, we would receive a benefit from the note hedge transactions and would not allow the dilution to occur, so management believes that adjusting for this benefit provides a meaningful view of net income per share.
Under GAAP, shares delivered under hedge transactions are not considered offsetting shares in the fully-diluted share calculation until they are delivered. However, we would receive a benefit from the note hedge transactions and would not allow the dilution to occur, so management believes that adjusting for this benefit provides a meaningful view of operating performance.
We periodically assess whether triggering events are present to review internal-use software for impairment. Changes in our estimates related to internal-use software would increase or decrease operating expenses or amortization recorded during the period. 45 Table of Contents
We periodically assess whether triggering events are present to review internal-use software for impairment. Changes in our estimates related to internal-use software would increase or decrease operating expenses or amortization recorded during the period.
We define Adjusted EBITDA as GAAP net income excluding the following items: interest and marketable securities income and losses; income taxes; depreciation and amortization of tangible and intangible assets; stock-based compensation; amortization of capitalized stock-based compensation; acquisition-related costs; restructuring charges; gains and losses on legal settlements; costs incurred related to endowment contributions to the Akamai Foundation; foreign exchange gains and losses; interest expense; amortization of capitalized interest expense; certain gains and losses on investments; income and losses from equity method investments; and other non-recurring or unusual items that may arise from time to time.
We define Adjusted EBITDA as GAAP net income excluding the following items: interest and marketable securities income and losses; income taxes; depreciation and amortization of tangible and intangible assets; stock-based compensation; amortization of capitalized stock-based compensation; acquisition-related costs; restructuring charges; foreign exchange gains and losses; interest expense; amortization of capitalized interest expense; certain gains and losses on investments; income and losses from equity method investments; and other non-recurring or unusual items that may arise from time to time.
We have been able to mitigate some of the negative impacts to our revenue growth rates by upselling incremental solutions to our existing customers.
We have been able to mitigate some of the negative impacts to our revenue growth rates by upselling incremental solutions to our existing delivery and security customers.
Different determinations related to combining services into performance obligations could result in differences in the timing and amount of revenue recognized in a period. Determination of the standalone selling price ("SSP") also requires the exercise of judgment by management.
Different determinations related to combining services into performance obligations could result in differences in the timing and amount of revenue recognized in a period. Determination of the standalone selling price ("SSP") for each distinct performance obligation in a contract also requires the exercise of judgment by management.
These increases were partially offset by a decrease in payroll and related costs due to a decline in performance-based compensation programs.
These increases were partially offset by a decrease in payroll and related costs due to a decline in performance-based compensation program achievement.
We have observed the following trends related to our revenue in recent years: • Increased sales of our security solutions, led by application security solutions and segmentation solutions from our Guardicore acquisition, and more recently, increased sales of our compute solutions primarily attributable to our acquisition of Linode in the first quarter of 2022, have made a significant contribution to revenue growth.
We have observed the following trends related to our revenue in recent years: • Increased sales of our security solutions, led by application security solutions and segmentation solutions from our acquisition of Guardicore Ltd., and increased sales of our compute solutions, primarily attributable to our acquisition of Linode in early 2022, have made a significant contribution to revenue growth.
Changes to the assumptions may have a significant impact on the fair value of stock-based awards, which could have a material impact on our financial statements. Judgment is also required in estimating the number of stock-based awards that are expected to be forfeited.
Changes to the assumptions may have an impact on the fair value of stock awards, which could have an impact on our financial statements. Judgment is also required in estimating the number of stock awards that are expected to be forfeited.
Amortization of Acquired Intangible Assets For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2022 2021 % Change 2021 2020 % Change Amortization of acquired intangible assets $ 64,983 $ 48,019 35.3 % $ 48,019 $ 42,049 14.2 % As a percentage of revenue 1.8 % 1.4 % 1.4 % 1.3 % The increase in amortization of acquired intangible assets for 2022 as compared to 2021, as well as 2021 as compared to 2020, was the result of amortization of acquired intangible assets related to our recent acquisitions.
Amortization of Acquired Intangible Assets For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2023 2022 % Change 2022 2021 % Change Amortization of acquired intangible assets $ 66,751 $ 64,983 2.7 % $ 64,983 $ 48,019 35.3 % As a percentage of revenue 1.8 % 1.8 % 1.8 % 1.4 % The increase in amortization of acquired intangible assets for 2023 as compared to 2022, as well as 2022 as compared to 2021, was the result of amortization of acquired intangible assets related to our recent acquisitions.
Our goals for the share repurchase programs are to offset the dilution created by our employee equity compensation programs over time and provide the flexibility to return capital to shareholders as business and market conditions warrant, while still preserving our ability to pursue other strategic opportunities.
Our goal for the share repurchase program is to offset the dilution created by our employee equity compensation programs over time and provide the flexibility to return capital to stockholders as business and market conditions warrant, while still preserving our ability to pursue other strategic opportunities.
Changes to the estimates we make from time to time may have a significant impact on our stock-based compensation expense and could materially impact our results of operations.
Changes to the estimates we make from time to time may have an impact on our stock-based compensation expense and our results of operations.
As we build out our new compute locations to provide us with the ability to scale our platform, we expect to enter into longer term leases that include certain financial commitments in order to achieve more favorable unit economics. The costs of the financial commitments are straight-lined over the life of the lease.
As we continue to build out our new compute locations to provide us with the ability to scale our platform, we expect to enter into longer term leases that include certain financial commitments in order to achieve more favorable unit economics.
The increase in 2022 as compared to 2021 was negatively impacted by the significant strengthening of the U.S. dollar and a decline in revenue from our delivery solutions.
The increase in 2022 as compared to 2021 was negatively impacted by the significant strengthening of the U.S. dollar and a decline in revenue from our delivery solutions due to a reduction in traffic growth and pricing impact of renewals.
General and administrative expenses for 2022, 2021 and 2020 are broken out by category as follows (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2022 2021 % Change 2021 2020 % Change Global functions $ 212,674 $ 212,456 0.1 % $ 212,456 $ 193,719 9.7 % As a percentage of revenue 5.9 % 6.1 % 6.1 % 6.1 % Infrastructure 345,391 326,480 5.8 326,480 325,434 0.3 As a percentage of revenue 9.6 % 9.4 % 9.4 % 10.2 % Other 26,141 14,088 85.6 14,088 28,735 (51.0) Total general and administrative expenses $ 584,206 $ 553,024 5.6 % $ 553,024 $ 547,888 0.9 % As a percentage of revenue 16.2 % 16.0 % 16.0 % 17.1 % Global functions expense includes payroll, stock-based compensation and other employee-related costs for administrative functions, including finance, purchasing, order entry, human resources, legal, information technology and executive personnel, as well as third-party professional service fees.
General and administrative expenses for 2023, 2022 and 2021 are broken out by category as follows (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2023 2022 % Change 2022 2021 % Change Global functions $ 246,753 $ 212,674 16.0 % $ 212,674 $ 212,456 0.1 % As a percentage of revenue 6.5 % 5.9 % 5.9 % 6.1 % Infrastructure 344,399 345,391 (0.3) 345,391 326,480 5.8 As a percentage of revenue 9.0 % 9.6 % 9.6 % 9.4 % Other 9,699 26,141 (62.9) 26,141 14,088 85.6 Total general and administrative expenses $ 600,851 $ 584,206 2.8 % $ 584,206 $ 553,024 5.6 % As a percentage of revenue 15.8 % 16.2 % 16.2 % 16.0 % Global functions expense includes payroll, stock-based compensation and other employee-related costs for administrative functions, including finance, purchasing, order entry, human resources, legal, information technology and executive personnel, as well as third-party professional service fees.
Prior to January 1, 2022, we excluded this non-cash interest expense from our non-GAAP results because it was not representative of ongoing operating performance. After January 1, 2022, this interest expense is no longer included in or excluded from GAAP or non-GAAP results.
Prior to January 1, 2022, we excluded this non-cash interest expense from our non-GAAP results because it was not representative of ongoing operating performance.
Liquidity and Capital Resources To date, we have financed our operations primarily through public and private sales of debt and equity securities and cash generated by operations. As of December 31, 2022, our cash, cash equivalents and marketable securities, which primarily consisted of time deposits, corporate bonds and U.S. government agency obligations, totaled $1.4 billion.
Liquidity and Capital Resources To date, we have financed our operations primarily through public and private sales of debt and equity securities and cash generated by operations. As of December 31, 2023, our cash, cash equivalents and marketable securities, which primarily consisted of corporate bonds, U.S. government agency obligations and money market funds, totaled $2.3 billion.
Unless our weighted average stock price is greater than $95.10, the initial conversion price of the convertible senior notes due 2025, or $116.18, the initial conversion price of the convertible senior notes due 2027, there will be no difference between our GAAP and non-GAAP diluted weighted average common shares outstanding.
With respect to the convertible senior notes due in each of 2029, 2027 and 2025, unless our weighted average stock price is greater than $126.31, $116.18 and $95.10, respectively, the initial conversion prices, there will be no difference between GAAP and non-GAAP diluted weighted average common shares outstanding.
We believe that our strong balance sheet and 39 Table of Contents cash position are important competitive differentiators that provide the financial stability and flexibility to enable us to continue to make investments at opportune times. We expect to continue to evaluate strategic investments to strengthen our business.
We believe that our strong balance sheet and cash position are important competitive differentiators that provide the financial stability and flexibility to enable us to continue to make investments at opportune times.
GAAP diluted weighted average common shares outstanding are adjusted in non-GAAP per share calculations for the shares that would be delivered to us pursuant to the note hedge transactions entered into in connection with the issuance of our convertible senior notes.
Diluted weighted average common shares outstanding are adjusted in non-GAAP per share calculations for the shares that would be delivered to us pursuant to the note hedge transactions entered into in connection with the issuance of $1,265 million of convertible senior notes due 2029 and the issuances of $1,150 million of convertible senior notes due 2027 and 2025, respectively.
Because we publicly report in U.S. dollars, and due to the strengthening U.S. dollar, our reported revenue results have been negatively impacted during 2022. 25 Table of Contents • We have experienced variations in certain types of revenue from quarter to quarter.
Because we 25 Table of Contents publicly report in U.S. dollars, our reported revenue results are negatively impacted when the dollar strengthens and benefit when the dollar weakens. • We have experienced variations in certain types of revenue from quarter-to-quarter.
Changes in foreign currency exchange rates negatively impacted our revenue by $122.1 million in 2022 as compared to 2021, and positively impacted our revenue by $28.8 million in 2021 as compared to 2020.
Changes in foreign currency exchange rates negatively impacted our revenue by $13.9 million in 2023 as compared to 2022, and negatively impacted our revenue by $122.1 million in 2022 as compared to 2021.
The additional compensation cost was initiated by and determined by the seller, and is in addition to normal levels of compensation, including retention programs, offered by Akamai. Acquisition-related costs are impacted by the timing and size of the acquisitions.
The additional compensation cost was initiated by and determined by the seller and is in addition to normal levels of compensation, including retention programs, offered by Akamai.
Fair value and useful life determinations may be based on, among other factors, estimates of future expected cash flows, royalty cost savings and appropriate discount rates used in calculating present values.
Fair value and useful life determinations may be based on, among other factors, estimates of future expected cash flows, royalty cost savings and appropriate discount rates used in calculating present values. The value of our acquired intangible assets could be different if we had used different assumption.
In October 2021, we acquired Guardicore for $610.7 million in cash. Guardicore's micro-segmentation solution is designed to limit user access to only those applications that are authorized to communicate with each other, thereby limiting the spread of malware and protecting the flow of enterprise data across the network.
In October 2021, we acquired Guardicore whose micro-segmentation solution is designed to limit user access to only those applications that are authorized to communicate with each other, thereby limiting the spread of malware and protecting the flow of enterprise data across the network. Guardicore had approximately 270 employees when we completed the acquisition.
Adjusted EBITDA margin represents Adjusted EBITDA stated as a percentage of revenue. 38 Table of Contents The following table reconciles GAAP net income to Adjusted EBITDA and Adjusted EBITDA margin for the years ended December 31, 2022, 2021 and 2020 (in thousands): 2022 2021 2020 Net income $ 523,672 $ 651,642 $ 557,054 Amortization of acquired intangible assets 64,983 48,019 42,049 Stock-based compensation 217,185 202,759 197,411 Amortization of capitalized stock-based compensation and capitalized interest expense 31,768 35,894 33,202 Restructuring charge 13,529 10,737 37,286 Acquisition-related costs 29,049 13,317 5,579 Legal settlements — — 275 Interest and marketable securities income, net (3,258) (15,620) (29,122) Endowment of Akamai Foundation — — 20,000 Interest expense 11,096 72,332 69,120 Provision for income taxes 126,696 62,571 45,922 Depreciation and amortization 496,909 467,048 403,160 Loss (gain) on investments 8,260 (3,680) (7,228) Loss from equity method investment 7,635 14,008 13,106 Other expense, net 2,173 1,895 9,682 Adjusted EBITDA $ 1,529,697 $ 1,560,922 $ 1,397,496 Net income margin 14 % 19 % 17 % Adjusted EBITDA margin 42 % 45 % 44 % Impact of Foreign Currency Exchange Rates Revenue and earnings from our international operations have historically been an important contributor to our financial results.
Adjusted EBITDA margin represents Adjusted EBITDA stated as a percentage of revenue. 38 Table of Contents The following table reconciles GAAP net income to Adjusted EBITDA and Adjusted EBITDA margin for the years ended December 31, 2023, 2022 and 2021 (in thousands): 2023 2022 2021 Net income $ 547,629 $ 523,672 $ 651,642 Amortization of acquired intangible assets 66,751 64,983 48,019 Stock-based compensation 328,467 217,185 202,759 Amortization of capitalized stock-based compensation and capitalized interest expense 32,981 31,768 35,894 Restructuring charge 56,643 13,529 10,737 Acquisition-related costs 13,345 29,049 13,317 Interest and marketable securities income, net (45,194) (3,258) (15,620) Interest expense 17,709 11,096 72,332 Provision for income taxes 106,373 126,696 62,571 Depreciation and amortization 472,035 496,909 467,048 (Gain) loss on investments (311) 8,260 (3,680) (Gain) loss from equity method investment (1,475) 7,635 14,008 Other expense, net 12,607 2,173 1,895 Adjusted EBITDA $ 1,607,560 $ 1,529,697 $ 1,560,922 Net income margin 14.4 % 14.5 % 18.8 % Adjusted EBITDA margin 42.2 % 42.3 % 45.1 % Impact of Foreign Currency Exchange Rates Revenue and earnings from our international operations have historically been an important contributor to our financial results.
In addition, the allowance for current expected credit losses considers outstanding balances on a customer-specific, account-by-account basis. We assess collectability based upon a review of customer receivables from prior sales with collection issues where we no longer believe that the customer has the ability to pay for services previously provided. We also perform ongoing credit evaluations of our customers.
We assess collectability based upon a review of customer receivables from prior sales with collection issues where we no longer believe that the customer has the ability to pay for services previously provided. We also perform ongoing credit evaluations of our customers.
For the year ended December 31, 2022, our effective income tax rate was lower than the federal statutory tax rate due to foreign income taxed at lower rates and the benefit of U.S. federal, state and foreign research and development credits.
These amounts were partially offset by a decrease in profitability. For the year ended December 31, 2023, our effective income tax rate was lower than the federal statutory tax rate due to foreign income taxed at lower rates and the benefit of U.S. federal, state and foreign research and development credits.
Our effective income tax rate may fluctuate between fiscal years and from quarter to quarter due to items arising from discrete events, such as tax benefits from the settlement of employee equity awards, tax law changes and settlements of tax audits and assessments.
These amounts were partially offset by non-deductible stock-based compensation and state income taxes. Our effective income tax rate may fluctuate between fiscal years and from quarter to quarter due to items arising from discrete events, such as tax benefits from the settlement of employee equity awards, tax law changes and settlements of tax audits and assessments.
Linode is an infrastructure-as-a-service platform provider that allows for developer-friendly cloud computing capabilities. The acquisition is intended to enhance our computing services by enabling us to create a unique cloud platform to build, run and secure applications from the cloud to the edge. Linode had approximately 250 employees when we completed the acquisition.
The acquisition was intended to enhance our computing services by enabling us to create a unique cloud platform to build, run and secure applications from the cloud to the edge. Linode had approximately 250 employees when we completed the acquisition.
Other (expense) income, net for the year ended December 31, 2022 includes an $8.9 million impairment from an equity investment, partially offset by a favorable impact of changes in foreign currency exchange rates.
Other (expense) income, net for 2022 includes impairments of $8.9 million from equity investments, partially offset by a favorable impact of changes in foreign currency exchange rates. Other (expense) income, net for 2021 includes a $3.7 million gain from the sale of an equity investment.
We believe excluding these amounts from non-GAAP financial measures is useful to investors as these infrequent expenses are not representative of our core business operations. • Income and losses from equity method investment – We record income or losses on our share of earnings and losses from our equity method investment.
We believe excluding these amounts from our non-GAAP financial measures is useful to investors as the types of events giving rise to these gains and losses are not representative of our core business operations and ongoing operating performance. • Gains and losses from equity method investment – We record income or losses on our share of earnings and losses from our equity method investment, and any gains from returns of investments or impairments.
We believe that applying the non-GAAP adjustments and their related income tax effect allows us to highlight income attributable to our core operations. 36 Table of Contents The following table reconciles GAAP income from operations to non-GAAP income from operations and non-GAAP operating margin for the years ended December 31, 2022, 2021 and 2020 (in thousands): 2022 2021 2020 Income from operations $ 676,274 $ 783,148 $ 658,534 Amortization of acquired intangible assets 64,983 48,019 42,049 Stock-based compensation 217,185 202,759 197,411 Amortization of capitalized stock-based compensation and capitalized interest expense 31,768 35,894 33,202 Restructuring charge 13,529 10,737 37,286 Acquisition-related costs 29,049 13,317 5,579 Legal settlements — — 275 Endowment of Akamai Foundation — — 20,000 Non-GAAP income from operations $ 1,032,788 $ 1,093,874 $ 994,336 GAAP operating margin 19 % 23 % 21 % Non-GAAP operating margin 29 % 32 % 31 % The following table reconciles GAAP net income to non-GAAP net income for the years ended December 31, 2022, 2021 and 2020 (in thousands): 2022 2021 2020 Net income $ 523,672 $ 651,642 $ 557,054 Amortization of acquired intangible assets 64,983 48,019 42,049 Stock-based compensation 217,185 202,759 197,411 Amortization of capitalized stock-based compensation and capitalized interest expense 31,768 35,894 33,202 Restructuring charge 13,529 10,737 37,286 Acquisition-related costs 29,049 13,317 5,579 Legal settlements — — 275 Endowment of Akamai Foundation — — 20,000 Amortization of debt discount and issuance costs 4,395 66,025 62,823 Loss (gain) on investments 8,260 (3,680) (7,228) Loss from equity method investment 7,635 14,008 13,106 Income tax effect of above non-GAAP adjustments and certain discrete tax items (42,768) (96,164) (103,280) Non-GAAP net income $ 857,708 $ 942,557 $ 858,277 37 Table of Contents The following table reconciles GAAP net income per diluted share to non-GAAP net income per diluted share for the years ended December 31, 2022, 2021 and 2020 (in thousands, except per share data): 2022 2021 2020 GAAP net income per diluted share $ 3.26 $ 3.93 $ 3.37 Adjustments to net income: Amortization of acquired intangible assets 0.40 0.29 0.25 Stock-based compensation 1.35 1.22 1.19 Amortization of capitalized stock-based compensation and capitalized interest expense 0.20 0.22 0.20 Restructuring charge 0.08 0.06 0.23 Acquisition-related costs 0.18 0.08 0.03 Legal settlements — — — Endowment of Akamai Foundation — — 0.12 Amortization of debt discount and issuance costs 0.03 0.40 0.38 Loss (gain) on investments 0.05 (0.02) (0.04) Loss from equity method investment 0.05 0.08 0.08 Income tax effect of above non-GAAP adjustments and certain discrete tax items (0.27) (0.58) (0.63) Adjustment for shares (1) 0.02 0.06 0.04 Non-GAAP net income per diluted share (2) $ 5.37 $ 5.74 $ 5.22 Shares used in GAAP per diluted share calculations 160,467 165,804 165,213 Impact of benefit from note hedge transactions (1) (720) (1,600) (873) Shares used in non-GAAP per diluted share calculations (1) 159,747 164,204 164,340 (1) Shares used in non-GAAP per diluted share calculations have been adjusted for the periods presented for the benefit of our note hedge transactions.
The following table reconciles GAAP income from operations to non-GAAP income from operations and non-GAAP operating margin for the years ended December 31, 2023, 2022 and 2021 (in thousands): 2023 2022 2021 Income from operations $ 637,338 $ 676,274 $ 783,148 Amortization of acquired intangible assets 66,751 64,983 48,019 Stock-based compensation 328,467 217,185 202,759 Amortization of capitalized stock-based compensation and capitalized interest expense 32,981 31,768 35,894 Restructuring charge 56,643 13,529 10,737 Acquisition-related costs 13,345 29,049 13,317 Non-GAAP income from operations $ 1,135,525 $ 1,032,788 $ 1,093,874 GAAP operating margin 16.7 % 18.7 % 22.6 % Non-GAAP operating margin 29.8 % 28.6 % 31.6 % The following table reconciles GAAP net income to non-GAAP net income for the years ended December 31, 2023, 2022 and 2021 (in thousands): 2023 2022 2021 Net income $ 547,629 $ 523,672 $ 651,642 Amortization of acquired intangible assets 66,751 64,983 48,019 Stock-based compensation 328,467 217,185 202,759 Amortization of capitalized stock-based compensation and capitalized interest expense 32,981 31,768 35,894 Restructuring charge 56,643 13,529 10,737 Acquisition-related costs 13,345 29,049 13,317 Amortization of debt discount and issuance costs 5,341 4,395 66,025 (Gain) loss on investments (311) 8,260 (3,680) (Gain) loss from equity method investment (1,475) 7,635 14,008 Income tax effect of above non-GAAP adjustments and certain discrete tax items (89,364) (42,768) (96,164) Non-GAAP net income $ 960,007 $ 857,708 $ 942,557 37 Table of Contents The following table reconciles GAAP net income per diluted share to non-GAAP net income per diluted share for the years ended December 31, 2023, 2022 and 2021 (in thousands, except per share data): 2023 2022 2021 GAAP net income per diluted share $ 3.52 $ 3.26 $ 3.93 Adjustments to net income: Amortization of acquired intangible assets 0.43 0.40 0.29 Stock-based compensation 2.11 1.35 1.22 Amortization of capitalized stock-based compensation and capitalized interest expense 0.21 0.20 0.22 Restructuring charge 0.36 0.08 0.06 Acquisition-related costs 0.09 0.18 0.08 Amortization of debt discount and issuance costs 0.03 0.03 0.40 (Gain) loss on investments — 0.05 (0.02) (Gain) loss from equity method investment (0.01) 0.05 0.08 Income tax effect of above non-GAAP adjustments and certain discrete tax items (0.58) (0.27) (0.58) Adjustment for shares (1) 0.02 0.02 0.06 Non-GAAP net income per diluted share (2) $ 6.20 $ 5.37 $ 5.74 Shares used in GAAP per diluted share calculations 155,397 160,467 165,804 Impact of benefit from note hedge transactions (1) (574) (720) (1,600) Shares used in non-GAAP per diluted share calculations (1) 154,823 159,747 164,204 (1) Shares used in non-GAAP per diluted share calculations have been adjusted for the periods presented for the benefit of our note hedge transactions.
The income tax effect of non-GAAP adjustments is the difference between GAAP and non-GAAP income tax expense. Non-GAAP income tax expense is computed on non-GAAP pre-tax income (GAAP pre-tax income adjusted for non-GAAP adjustments) and excludes certain discrete tax items (such as recording or releasing of valuation allowances), if any.
The income tax effect of non-GAAP adjustments is the difference between GAAP and non-GAAP income tax expense. Non-GAAP income tax expense is computed on non-GAAP pre-tax income (GAAP pre-tax income adjusted for non-GAAP adjustments) and excludes certain discrete tax items (such as the impact of intercompany sales of intellectual property related to our acquisitions), if any.
Loss from Equity Method Investment For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2022 2021 % Change 2021 2020 % Change Loss from equity method investment $ 7,635 $ 14,008 (45.5) % $ 14,008 $ 13,106 6.9 % As a percentage of revenue 0.2 % 0.4 % 0.4 % 0.4 % Loss from equity method investment includes our share of losses from our investment with MUFG in the joint venture GO-NET, in addition to impairment charges realized.
(Gain) Loss from Equity Method Investment For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2023 2022 % Change 2022 2021 % Change (Gain) loss from equity method investment $ (1,475) $ 7,635 (119.3) % $ 7,635 $ 14,008 (45.5) % As a percentage of revenue — % 0.2 % 0.2 % 0.4 % The amounts reflected in (gain) loss from equity method investment relate to our investment with MUFG in a joint venture, GO-NET.
We are taking steps to try to maintain alignment between customer traffic volumes and unit pricing. • Revenue from our international operations has generally been growing at a faster pace in recent years than from our U.S. operations, particularly from cross-selling of incremental solutions.
We are taking steps upon contract renewals to optimize how we charge certain high-volume traffic delivery customers, including charging a premium for higher-cost destinations and continuing to maintain alignment between customer traffic volumes and unit pricing. • Revenue from our international operations has generally been growing at a faster pace in recent years than from our U.S. operations, particularly from new customer acquisition and cross-selling of incremental solutions.
As of December 31, 2022, we had cash and cash equivalents of $249.5 million held in accounts outside the U.S. The U.S. Tax Cuts and Jobs Act establishes a territorial tax system in the U.S., which provides companies with the potential ability to repatriate earnings with minimal U.S. federal income tax impact.
Tax Cuts and Jobs Act establishes a territorial tax system in the U.S., which provides companies with the potential ability to repatriate earnings with minimal U.S. federal income tax impact. As a result, our liquidity is not expected to be materially impacted by the amount of cash and cash equivalents held in accounts outside the U.S.
For the year ended December 31, 2020, our effective income tax rate was lower than the federal statutory tax rate due to foreign income taxed at lower rates, the impact of the excess tax benefit related to stock-based compensation and the benefit of U.S. federal, state and foreign research and development credits.
These amounts were partially offset by non-deductible stock-based compensation and the tax on global intangible low-taxed income. 34 Table of Contents For the year ended December 31, 2022, our effective income tax rate was lower than the federal statutory tax rate due to foreign income taxed at lower rates and the benefit of U.S. federal, state and foreign research and development credits.
Non-Operating Income (Expense) For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2022 2021 % Change 2021 2020 % Change Interest and marketable securities income, net $ 3,258 $ 15,620 (79.1) % $ 15,620 $ 29,122 (46.4) % As a percentage of revenue 0.1 % 0.5 % 0.5 % 0.9 % Interest expense $ (11,096) $ (72,332) (84.7) % $ (72,332) $ (69,120) 4.6 % As a percentage of revenue (0.3) % (2.1) % (2.1) % (2.2) % Other (expense) income, net $ (10,433) $ 1,785 (684.5) % $ 1,785 $ (2,454) (172.7) % As a percentage of revenue (0.3) % 0.1 % 0.1 % (0.1) % Interest and marketable securities income, net primarily consists of interest earned on invested cash and marketable securities balances and income and losses on mutual funds that are associated with our employee non-qualified deferred compensation plan.
These restructuring charges were partially offset by the release of a lease obligation for a facility previously exited as part of management actions initiated in late 2019. 33 Table of Contents Non-Operating Income (Expense) For the Years Ended December 31, For the Years Ended December 31, (in thousands) 2023 2022 % Change 2022 2021 % Change Interest and marketable securities income, net $ 45,194 $ 3,258 1,287.2 % $ 3,258 $ 15,620 (79.1) % As a percentage of revenue 1.2 % 0.1 % 0.1 % 0.5 % Interest expense $ (17,709) $ (11,096) 59.6 % $ (11,096) $ (72,332) (84.7) % As a percentage of revenue (0.5) % (0.3) % (0.3) % (2.1) % Other (expense) income, net $ (12,296) $ (10,433) 17.9 % $ (10,433) $ 1,785 (684.5) % As a percentage of revenue (0.3) % (0.3) % (0.3) % 0.1 % Interest and marketable securities income, net primarily consists of interest earned on invested cash and marketable securities balances and income and losses on mutual funds that are associated with our employee non-qualified deferred compensation plan.
However, we remain disciplined in allocating our resources to support our faster growing security and compute solutions, including maintaining operational efficiencies to mitigate the rising cost of talent. We are prioritizing our hiring to our high growth areas.
It is important to the success of operations that we offer competitive compensation packages. However, we remain disciplined in allocating our resources to support our faster growing security and compute solutions, including maintaining operational efficiencies to mitigate the rising cost of talent.
During 2022, security and compute revenue represented over half of our total revenue.
During 2023, security represented the largest share of revenue with security and compute revenue representing over half of our total revenue.
In addition, these charges do not necessarily provide meaningful insight into the fundamentals of current or past operations of our business. 35 Table of Contents • Amortization of debt discount and issuance costs and amortization of capitalized interest expense – In August 2019, we issued $1,150 million of convertible senior notes due 2027 with a coupon interest rate of 0.375%.
In addition, these charges do not necessarily provide meaningful insight into the fundamentals of current or past operations of our business. • Amortization of debt discount and issuance costs and amortization of capitalized interest expense – We have convertible senior notes outstanding that mature in 2029, 2027 and 2025.
We will need to effectively manage our network build-out and supporting costs to maintain current levels of profitability. • Our employees are core to the operations of our business, and payroll and related costs, including stock-based compensation, is one of our largest expenses. It is important to the success of operations that we offer competitive compensation packages.
We will need to continue to effectively manage our network build-out and supporting service costs and continue to migrate third-party cloud services to Akamai Connected Cloud to maintain or improve current levels of profitability. • Our employees are core to the operations of our business, and payroll and related costs, including stock-based compensation, is our largest expense.
For the years ended December 31, 2022, 2021 and 2020, we capitalized $30.0 million, $32.2 million and $35.7 million, respectively, of stock-based compensation. These capitalized internal-use software development costs are amortized to cost of revenue over their estimated useful lives, ranging from two to seven years based on the software developed and its expected useful life.
These capitalized internal-use software development costs are amortized to cost of revenue over their estimated useful lives, ranging from two to ten years based on the software developed and its expected useful life.
Based on acquired intangible assets as of December 31, 2022, future amortization is expected to be $63.5 million, $59.2 million, $61.2 million, $56.3 million and $43.7 million for the years ending December 31, 2023, 2024, 2025, 2026 and 2027, respectively.
Based on acquired intangible assets as of December 31, 2023, future amortization is expected to be $84.8 million, $80.5 million, $76.1 million, $62.0 million and $49.6 million for the years ending December 31, 2024, 2025, 2026, 2027 and 2028, respectively.
We expect research and development costs to increase in 2023, in particular payroll and related costs and stock-based compensation, to support the continued growth of our compute and security solutions. 30 Table of Contents Sales and Marketing Expenses Sales and marketing expenses consisted of the following for the periods presented (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2022 2021 % Change 2021 2020 % Change Payroll and related costs $ 374,110 $ 366,501 2.1 % $ 366,501 $ 393,800 (6.9) % Stock-based compensation 47,789 46,342 3.1 46,342 65,257 (29.0) Marketing programs and related costs 55,033 40,553 35.7 40,553 39,272 3.3 Acquisition-related costs 2,166 — 100.0 — — — Other expenses 23,311 8,571 172.0 8,571 12,076 (29.0) Total sales and marketing $ 502,409 $ 461,967 8.8 % $ 461,967 $ 510,405 (9.5) % As a percentage of revenue 13.9 % 13.3 % 13.3 % 16.0 % The increase in sales and marketing expenses for 2022 as compared to 2021 was primarily due to increased marketing programs and related costs due to advertising and customer events held in 2022.
Sales and Marketing Expenses Sales and marketing expenses consisted of the following for the periods presented (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2023 2022 % Change 2022 2021 % Change Payroll and related costs $ 376,305 $ 374,110 0.6 % $ 374,110 $ 366,501 2.1 % Stock-based compensation 66,453 47,789 39.1 47,789 46,342 3.1 Marketing programs and related costs 59,151 55,033 7.5 55,033 40,553 35.7 Acquisition-related costs 1,387 2,166 (36.0) 2,166 — 100.0 Other expenses 29,930 23,311 28.4 23,311 8,571 172.0 Total sales and marketing $ 533,226 $ 502,409 6.1 % $ 502,409 $ 461,967 8.8 % As a percentage of revenue 14.0 % 13.9 % 13.9 % 13.3 % The increase in sales and marketing expenses for 2023 as compared to 2022 was due to higher payroll and related costs, including stock-based compensation, as a result of annual merit increases, headcount growth and the increased expected achievement of our performance-based compensation plans and other expenses due to increased travel expenses associated with customer meetings and sales events.
Increases and decreases in the allowance for current expected credit losses are included as a component of general and administrative expense in the consolidated statements of income. 43 Table of Contents Estimates are used in determining our allowance for current expected credit losses using historical loss rates for the previous twelve months as well as expectations about the future where we have been able to develop forecasts to supports our estimates.
Estimates are used in determining our allowance for current expected credit losses using historical loss rates for the previous twelve months as well as expectations about the future where we have been able to develop forecasts to supports our estimates. In addition, the allowance for current expected credit losses considers outstanding balances on a customer-specific, account-by-account basis.
As a result, our revenue is impacted by the amount of traffic we serve on our network or the usage of cloud computing services, the rate of adoption of gaming, social media and video platform offerings, the timing and variability of customer-specific one-time events and geopolitical, economic and other developments that impact our customers' businesses.
Our revenue is also impacted by customer renewals, the rate of adoption and timing of customer offerings, variability of one-time events, usage of cloud computing services and the amount of traffic we serve on our network.
Revenue derived in the U.S. and internationally during the periods presented is as follows (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2022 2021 % Change % Change at Constant Currency 2021 2020 % Change % Change at Constant Currency U.S. $ 1,902,051 $ 1,837,508 3.5 % 3.5 % $ 1,837,508 $ 1,777,435 3.4 % 3.4 % International 1,714,603 1,623,715 5.6 13.2 1,623,715 1,420,714 14.3 12.3 Total revenue $ 3,616,654 $ 3,461,223 4.5 % 8.0 % $ 3,461,223 $ 3,198,149 8.2 % 7.3 % For each of the years ended December 31, 2022 and 2021, approximately 47% of our revenue was derived from our operations located outside of the U.S., compared to 44% for the year ended December 31, 2020.
Revenue derived in the U.S. and internationally during the periods presented is as follows (in thousands): For the Years Ended December 31, For the Years Ended December 31, 2023 2022 % Change % Change at Constant Currency 2022 2021 % Change % Change at Constant Currency U.S. $ 1,968,779 $ 1,902,051 3.5 % 3.5 % $ 1,902,051 $ 1,837,508 3.5 % 3.5 % As a percentage of revenue 51.6 % 52.6 % 52.6 % 53.1 % International 1,843,141 1,714,603 7.5 8.3 1,714,603 1,623,715 5.6 % 13.2 As a percentage of revenue 48.4 % 47.4 % 47.4 % 46.9 % Total revenue $ 3,811,920 $ 3,616,654 5.4 % 5.8 % $ 3,616,654 $ 3,461,223 4.5 % 8.0 % For each of the years ended December 31, 2023, 2022 and 2021, no single country outside of the U.S. accounted for 10% or more of revenue.
The increase in security solutions revenue for 2022 as compared to 2021, was due to growth in a number of key products in our security solutions portfolio, including our application security portfolio, driven by application and application performance interfaces protection, as well as our Zero Trust Enterprise portfolio, which is led by our Guardicore segmentation solution.
The increase in security solutions revenue for 2023 as compared to 2022, and 2022 as compared to 2021, was due to growth in a number of key products in our security solutions portfolio, including our segmentation and web application firewall solutions, denial of service and bot management solutions.
Cash Provided by Operating Activities For the Years Ended December 31, (in thousands) 2022 2021 2020 Net income $ 523,672 $ 651,642 $ 557,054 Non-cash reconciling items included in net income 756,321 793,445 727,829 Changes in operating assets and liabilities (5,317) (40,524) (69,883) Net cash flows provided by operating activities $ 1,274,676 $ 1,404,563 $ 1,215,000 The decrease in cash provided by operating activities for 2022 as compared to 2021 was primarily due to income taxes paid on an intercompany sale of intellectual property, lower profitability and timing of vendor payments.
Cash Provided by Operating Activities For the Years Ended December 31, (in thousands) 2023 2022 2021 Net income $ 547,629 $ 523,672 $ 651,642 Non-cash reconciling items included in net income 931,507 756,321 793,445 Changes in operating assets and liabilities (130,697) (5,317) (40,524) Net cash flows provided by operating activities $ 1,348,439 $ 1,274,676 $ 1,404,563 The increase in cash provided by operating activities for 2023 as compared to 2022 was due to increased profitability in 2023, as well as cash paid for income taxes related to an intercompany sale of intellectual property and additional compensation costs paid to employees acquired from the Linode acquisition based on an agreement with the acquiree, both of which occurred in 2022 and did not re-occur in 2023.