Biggest changeDecember 31, 2024 Percentage of Revenue December 31, 2023 Percentage of Revenue Revenue $ 343,925 100% $ 401,971 100% Operating expenses: Cost of revenue (excluding depreciation and amortization) 191,561 56% 248,745 62% Salaries and benefits 113,512 33% 106,505 26% Selling, general, and administrative 47,346 14% 54,307 14% Depreciation and amortization 80,107 23% 78,403 20% Total operating expenses 432,526 126% 487,960 121% Operating loss (88,601) (26)% (85,989) (21)% Other expense (income): Interest expense, net 31,562 9% 48,745 12% Gain on extinguishment of debt (20,109) (6)% — —% Loss on extinguishment of related-party debt — —% 2,004 —% Change in fair value of warrant liabilities (2,386) (1)% (5,109) (1)% Total other expense, net 9,067 3% 45,640 11% Loss before income tax (97,668) (28)% (131,629) (33)% Income tax benefit (370) —% (20,371) (5)% Net loss from continuing operations (97,298) (28)% (111,258) (28)% Net loss from discontinued operations, net of tax — —% (174,327) (43)% Net loss (97,298) (28)% (285,585) (71)% Less: Net loss from continuing operations attributable to non-controlling interest (22,625) (7)% (25,531) (6)% Less: Net loss from discontinued operations attributable to non-controlling interest — —% (32,833) (8)% Net loss attributable to System1, Inc. $ (74,673) (22)% $ (227,221) (57)% * Percentages may not sum due to rounding Revenue and Cost Metrics The key non-financial performance metrics we use to evaluate our business, track the effectiveness of our operations and measure our performance are total advertising spend, number of Owned & Operated Advertising sessions ("O&O sessions"), number of Partner Network sessions ("Network sessions"), Owned & Operated Advertising revenue-per-session ("O&O RPS"), Owned & Operated Advertising cost-per-session ("O&O CPS") and Partner Network revenue-per-session ("Network RPS") to track our operations.
Biggest changeDecember 31, 2025 Percentage of Revenue December 31, 2024 Percentage of Revenue Revenue $ 266,129 100% $ 343,925 100% Operating expenses: Cost of revenue 165,734 62% 242,602 71% Salaries and benefits 92,747 35% 113,512 33% Selling, general, and administrative 69,688 26% 76,412 22% Total operating expenses 328,169 123% 432,526 126% Operating loss (62,040) -23% (88,601) -26% Other expense (income): Interest expense, net 27,556 10% 31,562 9% Gain on extinguishment of tax receivable agreement liability (5,253) -2% — —% Gain on extinguishment of debt — —% (20,109) -6% Change in fair value of warrant liabilities (275) —% (2,386) -1% Total other expense, net 22,028 8% 9,067 3% Loss before income tax (84,068) -32% (97,668) -28% Income tax benefit (2,875) -1% (370) —% Net loss (81,193) -31% (97,298) -28% Less: Net loss attributable to non-controlling interest (15,848) -6% (22,625) -7% Net loss attributable to System1, Inc. $ (65,345) -25% $ (74,673) -22% Percentages may not sum due to rounding Revenue Metrics The key non-financial performance metrics we use to evaluate our business, track the effectiveness of our operations and measure our performance are return on traffic acquisition cost ("RTAC"), the number of Products sessions and Products revenue-per-session ("Products RPS").
In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, carryback potential if permitted under the tax law, and results of operations.
In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, carryback potential 62 if permitted under the tax law, and results of operations.
Under this method, we determine DTAs and DTLs on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax 64 rates in effect for the year in which the differences are expected to reverse.
Under this method, we determine DTAs and DTLs on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse.
Revenue is also earned from revenue-sharing arrangements with our Network Partners related to the use of our RAMP platform and additional services provided to them in order to direct advertising by our Advertising Partners to their digital online inventory.
Revenue is also earned from revenue-sharing arrangements with our Network Partners related to the use of our platform and additional services provided to them in order to direct advertising by our Advertising Partners to their digital online inventory.
We have determined that we are the principal since we direct the use of our owned and operating websites, and as such have risk of loss on the user-traffic that we are acquiring for monetization with our Advertising Partners.
We have determined that we are the principal since we direct the use of our owned and operating websites, and as such have a risk of loss on the user-traffic that we are acquiring for monetization with our Advertising Partners.
We are subject to U.S. federal income taxes, in addition to state and local income taxes with respect to its allocable share of any taxable income or loss of System1 Holdings, as well as any stand-alone income or loss generated by us. 55 Results of Operations The following table sets forth our consolidated results of operations and our consolidated results of operations as a percentage of revenue for the periods presented (in thousands).
We are subject to U.S. federal income taxes, in addition to state and local income taxes with respect to its allocable share of any taxable income or loss of System1 Holdings, as well as any stand-alone income or loss generated by us. 52 Results of Operations The following table sets forth our consolidated results of operations and our consolidated results of operations as a percentage of revenue for the periods presented (in thousands).
Our main focus is executing on our operational strategy, which includes continued focus on expanding the number of advertising partners that are utilizing or integrated with RAMP by continuing to attract and monetize users with commercial intent on our owned and operated web properties and on behalf of our Network Partners as well as optimizing bids and driving higher returns on advertising spend.
Our main focus is executing on our operational strategy, which includes continued focus on expanding the number of advertising partners that are utilizing or integrated with our platform by continuing to attract and monetize users with commercial intent on our owned and operated web properties and on behalf of our Network Partners as well as optimizing bids and driving higher returns on advertising spend.
The following discussion and analysis should also be read together with the section entitled "Organization and description of business" in Part II as of December 31, 2024. In addition to historical information, the following discussion and analysis contains forward-looking statements. Our actual results may differ significantly from those projected in such forward-looking statements.
The following discussion and analysis should also be read together with the section entitled "Organization and description of business" in Part II as of December 31, 2025. In addition to historical information, the following discussion and analysis contains forward-looking statements. Our actual results may differ significantly from those projected in such forward-looking statements.
As a partnership, S1 Holdco is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by S1 Holdco is passed through to and included in the taxable income or loss of its members, including us, on a pro rata basis.
As a partnership, S1 Holdco was not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by S1 Holdco was passed through to and included in the taxable income or loss of its members, including us, on a pro rata basis.
We are subject to U.S. federal income taxes, in addition to state and local income taxes with respect to its allocable share of any taxable income or loss of S1 Holdco, as well as any stand-alone income or loss generated by us .
We were subject to U.S. federal income taxes, in addition to state and local income taxes with respect to its allocable share of any taxable income or loss of S1 Holdco, as well as any stand-alone income or loss generated by us.
Key assumptions in these models include, but are not limited to, the selection of comparable transactions, revenue and "EBITDA" is defined as net income or loss before results from discontinued operations, interest, income tax expense or benefit, and depreciation and amortization multiples and EBITDA margins from those transactions.
Key assumptions in these models include, but are not limited to, the selection of comparable transactions, revenue and "EBITDA" is defined as net income or loss, interest, income tax expense or benefit, and depreciation and amortization multiples and EBITDA margins from those transactions.
For every interest period, the interest rate on the Term Loan is the adjusted Secured Overnight Financing Rate ("SOFR") plus 4.75%. The Term Loan is amortized in quarterly installments on each scheduled payment date.
The Term loan expires in July 2027. For every interest period, the interest rate on the Term Loan is the adjusted Secured Overnight Financing Rate ("SOFR") plus 4.75%. The Term Loan is amortized in quarterly installments on each scheduled payment date.
In the year ended December 31, 2024, cash used in operating activities of $5.3 million resulted primarily from a net loss of $97.3 million, offset by $95.0 million of non-cash items, comprised of $80.1 million depreciation and amortization expense, $15.8 million stock based compensation expense, $17.9 million shared based compensation liability expense and $20.1 million gain on extinguishment of debt.
Net cash used for working capital was $19.0 million. 59 In the year ended December 31, 2024, cash used in operating activities of $5.3 million resulted primarily from a net loss of $97.3 million, offset by $95.0 million of non-cash items, comprised of $80.1 million depreciation and amortization expense, $15.8 million of stock-based compensation expense, $17.9 million shared-based compensation liability expense and $20.1 million gain on extinguishment of debt.
Cost of revenue (excluding depreciation and amortization) primarily consists of traffic acquisition costs, which are the costs to place advertisements to acquire customers to our websites and services, as well as domain name registration costs and licensing costs to provide mapping services to Mapquest.com. We do not pre-pay any traffic acquisition costs, and therefore, such costs are expensed as incurred.
Cost of revenue primarily consists of traffic acquisition costs, which are the costs to place advertisements to acquire customers to our websites and services, domain name registration costs, licensing costs to provide mapping services to Mapquest.com and amortization related to our platform. We do not pre-pay any traffic acquisition costs, and therefore, such costs are expensed as incurred.
As of December 31, 2024, we own and operate approximately 40 websites, including leading search engines like info.com and Startpage.com , and digital media publishing websites and internet utilities, such as HowStuffWorks , MapQuest , CouponFollow and ActiveBeat . Our primary operations are in the United States, and we also have operations in Canada and the Netherlands.
Today, we own and operate approximately 40 websites, including leading search engines like Startpage.com and info.com , and digital media publishing websites and internet utilities, such as CouponFollow , MapQuest , HowStuffWorks and ActiveBeat . Our primary operations are in the United States, and we also have operations in Canada and the Netherlands.
Contractual Obligations and Known Future Cash Requirements Service Agreements In June 2021, we entered into a multi-year agreement with a service provider whereby we are contractually obligated to spend $5.0 million annually between July 2023 and June 2026 . As of December 31, 2024, we remain contractually obligated to spend a remaining $6.2 million towards this commitment.
Contractual Obligations and Known Future Cash Requirements Service Agreements In June 2023, we entered into a multi-year agreement with a data cloud platform service provider whereby we are contractually obligated to spend $5.0 million annually between July 2023 and June 2026. As of December 31, 2025, we remain contractually obligated to spend a remaining $1.2 million towards this commitment.
The Term Loan comes with a leverage ratio covenant, which goes into effect only if the utilization on the 2022 Revolving Facility exceeds 35% of the total availability under the 2022 Revolving Facility at each quarter-end starting from the first full quarter after the effective date of the Merger, such that the first lien leverage ratio (as defined in the credit agreement) should not exceed 5.40.
The Term Loan comes with a leverage ratio covenant, which goes into effect only if the utilization on the Revolving Facility exceeds 35% of the total availability under the Revolving Facility at each quarter-end, such that the first lien leverage ratio (as defined in the credit agreement) should not exceed 5.40.
Income tax benefit During 2023 and through July 31, 2024, we were the sole managing member of S1 Holdco and, as a result, consolidate the financial results of S1 Holdco. S1 Holdco is treated as a partnership for U.S. federal and most applicable state and local income tax purposes.
The mark to market of our liability-classified Warrants. Income tax benefit During 2024 and through July 31, 2024, we were the sole managing member of S1 Holdco and, as a result, consolidate the financial results of S1 Holdco. S1 Holdco is treated as a partnership for U.S. federal and most applicable state and local income tax purposes.
We are subject to U.S. federal income taxes, in addition to state and local income taxes with respect to our allocable share of any taxable income or loss of System1 Holdings, as well as any stand-alone income or loss generated by us. Various of our subsidiaries are subject to income tax in the United States and in other countries.
We are subject to U.S. federal income taxes, in addition to state and local income taxes with respect to our allocable share of any taxable income or loss of System1 Holdings, as well as any stand-alone income or loss generated by us.
Cash Flows The following table summarizes our cash flows for the periods presented (in thousands): December 31, 2024 December 31, 2023 Net cash used in operating activities $ (5,255) $ (24,742) Net cash (used in) provided by investing activities $ (6,255) $ 203,179 Net cash used in financing activities $ (63,961) $ (74,072) Operating Activities Our cash flows from operating activities are primarily impacted by growth in our operations, timing of collections from our partners and related payments to our suppliers for advertising inventory and data.
Cash Flows The following table summarizes our cash flows for the periods presented (in thousands): December 31, 2025 December 31, 2024 Net cash used in operating activities $ (4,147) $ (5,255) Net cash used in investing activities $ (6,723) $ (6,255) Net cash provided by (used in) financing activities $ 31,305 $ (63,961) Operating Activities Our cash flows from operating activities are primarily impacted by growth in our operations, timing of payments to our suppliers for advertising inventory and data and related collections from our partners.
Income Taxes We are the sole managing member of System1 Holdings and, as a result, consolidate the financial results of System1 Holdings. System1 Holdings is treated as a partnership for U.S. federal and most applicable state and local income tax purposes. As a partnership, System1 Holdings is not subject to U.S. federal and certain state and local income taxes.
As of August 1, 2024, we are the sole managing member of System1 Holdings and, as a result, consolidate the financial results of System1 Holdings. System1 Holdings is treated as a partnership for U.S. federal and most applicable state and local income tax purposes.
Gain on extinguishment of debt Gain on extinguishment of debt increased $20.1 million compared to the prior comparative period due to the repurchase of our principal debt balances via a Dutch auction and direct buy backs.
Gain on extinguishment of debt Gain on extinguishment of debt decreased $20.1 million compared to 2024 due to the repurchase of our principal debt balances via a Dutch auction and direct buy backs in 2024.
Following the corporate reorganization, (a) System1 Holdings now owns 100% of S1 Holdco, the previous intermediate holding company with the non-controlling interests, and 100% of S1 Media, LLC (“S1 Media”), another new subsidiary formed in connection with the corporate reorganization, (b) S1 Media holds the assets and business operations associated with our owned and operated products businesses, which include NextGen Shopping, Inc.
Following the corporate reorganization, (a) System1 Holdings now owns 100% of S1 Holdco, LLC ("S1 Holdco"), the previous intermediate holding company with the non-controlling interests, and 100% of S1 Media, LLC (“S1 Media”), another new subsidiary formed in connection with the corporate reorganization, (b) S1 Media holds the assets and business operations associated with our Products businesses, which include CouponFollow, Startpage and MapQuest, and our acquisition marketing platform and (c) S1 Holdco holds our assets related to our Marketing businesses.
We typically pay suppliers in advance of collections from our clients and our collection and payment cycles can vary from period to period. In addition, seasonality may impact cash flows from operating activities on a sequential quarterly basis during the year.
Payment and collection cycles can vary from period to period. In addition, seasonality may impact cash flows from operating activities on a sequential quarterly basis during the year.
Any taxable income or loss generated by System1 Holdings is passed through to and included in the taxable income or loss of our members, including us, on a pro rata basis.
Any taxable income or loss generated by S1 Holdco was passed through to and included in the taxable income or loss of its members, including us, on a pro rata basis.
Critical Accounting Policies and Estimates The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with the accounting principles generally accepted in the United States of America.
See Item 8, "Financial Statements and Supplementary Data —Note 8, Commitments and Contingencies" for additional information. 60 Critical Accounting Policies and Estimates The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with the accounting principles generally accepted in the United States of America.
We have been able to and expect to be able to continue to make the required payments of principal and interest on the Credit Agreement (as and when due) on a timely basis.
We were in compliance with the financial covenants under the Term Loan as of December 31, 2025. We have been able to and expect to be able to continue to make the required payments of principal and interest on the Credit Agreement (as and when due) on a timely basis.
However, actual results from the resolution of such estimates and assumptions may vary from those used in the preparation of the consolidated financial statements. 63 Goodwill We perform annual impairment testing on goodwill in the fourth quarter of each fiscal year or when events occur or circumstances change that would, more likely than not, reduce the fair value of a reporting unit below its carrying amount.
Goodwill We perform annual impairment testing on goodwill in the fourth quarter of each fiscal year or when events occur or circumstances change that would, more likely than not, reduce the fair value of a reporting unit below its carrying amount.
Financing Activities Our financing activities consisted primarily of borrowings and repayments of our indebtedness under our credit facilities and redemptions of our Class A common stock. 62 In the year ended December 31, 2024 , cash used in financing activities of $64.0 million resulted primarily from repayment of principal and interest on the Term Loan.
In the year ended December 31, 2024, cash used in financing activities of $64.0 million resulted primarily from repayment of principal and interest on our Term Loan.
Gain on extinguishment of debt . The recognition of the gain from the repurchase of a portion of our Term Loan at a discount. See Item 8, "Financial Statements and Supplementary Data —Note 9, Debt, Net" for additional information. Loss on extinguishment of related-party debt .
The recognition of the reversal of amounts recognized under the tax receivable agreement. Gain on extinguishment of debt . The recognition of the gain from the repurchase of a portion of our Term Loan at a discount. See Item 8, "Financial Statements and Supplementary Data —Note 9, Debt, Net" for additional information. Change in fair value of warrant liabilities .
We have elected to treat stock-based payment awards with time-based service condition(s) only as a single award, with the related compensation expense recognized on a straight-line basis.
Stock-Based Compensation Compensation cost related to stock-based payments is measured based on the fair value of the units issued and recognized in salaries and benefits expenses on our consolidated statement of operations. We have elected to treat stock-based payment awards with time-based service condition(s) only as a single award, with the related compensation expense recognized on a straight-line basis.
See our concentration with customers discussion at Item 8 "Financi al Statements and supplementary data — Note 14, Segment Reporting" for additional information. 59 Credit Facilities Term Loan In connection with the Merger, we entered into a new loan ("Term Loan") and revolving facility ("2022 Revolving Facility" and, together with the Term Loan "Credit Agreement") with Bank of America, N.A. as administrative agent, on January 27, 2022, providing for a 5.5 year Term Loan with an initial principal balance of $400.0 million.
Credit Facilities Term Loan We entered into a term loan ("Term Loan") and revolving facility ("Revolving Facility" and, together with the Term Loan "Credit Agreement") with Bank of America, N.A. as administrative agent, on January 27, 2022, providing for a 5.5 year Term Loan with an initial principal balance of $400.0 million and with net proceeds of $376.0 million.
During 2024, we completed the repurchase of $64.9 million in principal amount of our Term Loan for an aggregate purchase price of $41.6 million (at discount of 64.1% of its par value). Following the repurchases on January 17, 2024 and April 30, 2024, the outstanding principal amount of the Term Loan was $301.3 million and $295.0 million, respectively.
During 2024, we completed the repurchase of $64.9 million in principal amount of our Term Loan for an aggregate purchase price of $41.6 million (at discount of 64.1% of its par value). We used available cash on hand to fund the repurchase. 58 As of December 31, 2025, there was principal of $260.1 million outstanding.
The fair values of our reporting units are computed through weighting a discounted cash flow model and a reference transaction model which include inputs developed using both internal and market-based data.
If, however, the fair value of the reporting unit is less than the carrying amount, an impairment loss is recognized in an amount equal to the excess, not to exceed the carrying amount of goodwill The fair values of our reporting units are determined by weighting a discounted cash flow model and a reference transaction model which include inputs developed using both internal and market-based data.
As of December 31, 2024, there was no balance outstanding on the 2022 Revolving Facility and principal of $280.1 million was outstanding on the Term Loan. Through December 31, 2025, $5.0 million of the Term Loan is payable quarterly. From March 31, 2026, $7.5 million of the Term Loan is payable quarterly. The Term Loan matures in 2027.
Through December 31, 2025, $5.0 million of the Term Loan is payable quarterly. From March 31, 2026, $7.5 million of the Term Loan is payable quarterly. Revolving Facility The Revolving Facility provides borrowing availability of up to $50.0 million and expires in January 2027.
Investing Activities In the year ended December 31, 2024 , cash used in investing activities of $6.3 million resulted primarily from capitalization of software development costs. In the year ended December 31, 2023, cash provided by investing activities of $203.2 million resulted primarily from proceeds from the sale of our Protected business segment on November 30, 2023.
Net cash used for working capital was $2.9 million. Investing Activities In the year ended December 31, 2025, cash used in investing activities of $6.7 million resulted primarily from capitalization of software development costs. In the year ended December 31, 2024, cash used in investing activities of $6.3 million resulted primarily from capitalization of software development costs.
The decrease was primarily due to a $6.8 million decrease in advisory and consulting fees and a decline in bad debt expense of $2.3 million. This decrease was partially offset by a $2.5 million increase due to a class action complaint settlement.
The decrease was primarily driven by a $4.7 million reduction in professional and consulting fees, and a $3.8 million reduction in legal settlement expenses compared to the comparative period which recognized a $2.5 million class action complaint settlement. This was offset by an increase of $1.3 million in software and subscription expense.
For this revenue stream, we are the principal in the transaction and report revenue on a gross basis for the amounts received from Advertising Partners.
Components of Our Results of Operations Revenue We earn revenue by directly acquiring traffic to our owned and operated websites and utilizing our platform and additional services to monetize end-users for our Advertising Partners. For this revenue stream, we are the principal in the transaction and report revenue on a gross basis for the amounts received from Advertising Partners.
Depreciation and amortization expenses are primarily attributable to our capital investment(s) and consist of property and equipment depreciation and amortization of intangible assets with finite lives. 54 Other Expenses Other expenses consist of the following: Interest expense, net . Interest expense consists of interest on our debt and the amortization of deferred financing costs and debt discount.
Selling, general, and administrative expenses consist of depreciation, general intangibles amortization, fees for software services, professional services, occupancy costs and travel and entertainment. Depreciation and general intangibles amortization expense are primarily attributable to our capital investment(s) and consist of property and equipment depreciation and amortization of intangible assets with finite lives .
In the year ended December 31, 2023, cash used in financing activities of $74.1 million resulted primarily from repayment of the 2022 Revolving Facility of $50.0 million and repayment of our Term Loan of $20.0 million.
In the year ended December 31, 2025, cash provided by financing activities of $31.3 million resulted primarily from $50.0 million drawn on our revolver facility and proceeds of $2.3 million from the sale of unregistered securities , offset by $20.0 million repayment of principal and interest on our Term Loan and $0.6 million of share repurchases.
We believe total advertising spend is a relevant measure to gauge the effectiveness of our Company to deploy capital to acquire monetizable traffic to our Owned & Operated websites, which is a key driver of our Owned & Operated reportable segment. 56 We define O&O sessions as the total number of monetizable user visits to our Owned & Operated Advertising websites.
Agency fees are the amount of costs for agencies acquiring traffic to Owned and Operated websites. We believe RTAC is a relevant measure to evaluate our effectiveness and efficiency in deploying capital to acquire monetizable traffic to our Marketing segment. 53 Products We define Products sessions as the total number of monetizable user visits to our Products websites.
Operating seamlessly across major advertising networks and advertising category verticals to acquire end-users, RAMP allows us to monetize these acquired end users through our relationships with third party advertisers and advertising networks ("Advertising Partners").
Our platform operates across our network of flagship owned and operated websites ("Products"), allowing us to monetize user traffic that we source from various acquisition marketing channels. Our marketing platform allows us to operate seamlessly across major advertising networks and advertising category verticals to acquire and monetize end-users through our relationships with third party advertisers and advertising networks ("Advertising Partners").
We believe both O&O RPS and Network RPS are key measures to evaluate our effectiveness in converting monetizable traffic into revenue. We define O&O CPS as advertising spend divided by O&O sessions.
Monetizable visits exclude those visits identified as spam, bot, or other invalid traffic. We define Products RPS as Products revenue divided by Products sessions. We believe Product sessions and RPS are relevant measures to evaluate our effectiveness and efficiency in converting monetizable traffic into revenue, which are key drivers of our Products reportable segment.
See Item 8, "Financial Statements and Supplementary Data — N ote 8, Commitments and Contingencies" for additional information regarding the class action complaint settlement. Depreciation and amortization Depreciation and amortization expense increased $1.7 million, or 2% compared to the prior comparative period primarily due to increased amortization for our continued investment in internally developed software.
See Item 8, "Financial Statements and Supplementary Data — Note 8, Commitments and Contingencies" for additional information regarding the class action complaint settlement. Other expense (income): Interest expense, net Interest expense, net decreased $4.0 million, or -13% , compared to 2024 primarily due to lower average interest rates in 2025 as compared to 2024.
For the year ended December 31, 2024, compared to prior year, our O&O CPS decreased $0.04 to $0.02 from $0.06. Our chief operating decision maker measures and evaluates reportable segments based on segment operating revenue and adjusted gross profit. We define and calculate adjusted gross profit as revenue less advertising expense incurred to acquire users.
Our chief operating decision maker measures and evaluates reportable segments based on segment operating revenue and segment adjusted gross profit. We define and calculate segment adjusted gross profit as revenue less traffic acquisition costs incurred to acquire users. The remaining cost of revenue consists of non-advertising expenses such as set-up costs, royalties, fees and amortization related to our platform.
We define total advertising spend as the amount of advertising that is spent by us to acquire traffic to our owned and operated websites.
Marketing We define RTAC as platform revenue divided by traffic acquisition cost. Platform revenue is Revenue plus Network Partner revenue share. Traffic Acquisition Cost ("TAC") is defined as the sum of total advertising spend, agency fees and Network Partner revenue share. Advertising spend is the amount of advertising that is spent to acquire traffic.
In December 2023, we repaid the full $50 million that was outstanding. During 2024 we did not have any borrowings from the 2022 Revolving Facility and at December 31, 2024, there was no outstanding balance.
The interest rate on the Revolving Facility is the adjusted SOFR plus 2.5% with an adjusted SOFR floor of 0%. During 2024 we did not have any borrowings from the Revolving Facility. During the fourth quarter of 2025 we borrowed $50.0 million from the Revolving Facility and the balance outstanding at December 31, 2025 was $50.0 million.
Should we fail to distribute the financial statements to our lender within 120 days, we have an additional 30 days to cure such default. The 2022 Revolving Facility matures in January 2027, and accordingly, it is classified within long-term debt, net on the consolidated balance sheet.
Should we fail to distribute the financial statements to our lender within 120 days, we have an additional 30 days to cure such default. We were in compliance with the financial covenants under the Term Loan as of December 31, 2025.
We have two reportable segments: • Owned and Operated Advertising ("O&O"); and • Partner Network Operating Expenses We classify our operating expenses into the following categories: Cost of revenue (excluding depreciation and amortization) .
We have two reportable segments: • Marketing; and • Products Operating Expenses To conform to the current period’s presentation, depreciation and amortization expense was reclassified to cost of revenue and selling, general, and administrative in the prior period consolidated statements of operations. We classify our operating expenses into the following categories: Cost of revenue .
RAMP also allows third party advertising platforms and publishers ("Network Partners") to send user traffic to, and monetize end user traffic on, our owned and operated websites or through our monetization agreements. Through RAMP, we process daily advertising campaign optimizations and ingest over 12 billion rows of data daily across approximately 40 advertising vertical categories as of December 31, 2024.
The platform also allows third party advertising platforms and publishers ("Network Partners") to send user traffic to, and monetize user traffic on, our Products or through our monetization agreements.
S1 Holdco and its subsidiaries remain obligors and guarantors under our Term Loan and 2022 Revolving Facility, and System1 Holdings and S1 Media are not parties thereto. 53 Components of Our Results of Operations Revenue We earn revenue by directly acquiring traffic to our owned and operated websites and utilizing our RAMP platform and additional services to monetize end-users for our Advertising Partners.
System1 Holdings holds our remaining assets and business operations. S1 Holdco and its subsidiaries remain obligors and guarantors under our Term Loan and Revolving Facility, and System1 Holdings and S1 Media are not parties thereto.
This was partially offset by a $7.8 million decrease in stock-based compensation due to Replacement Awards fully vesting and a $3.5 million decrease in payroll-related expenses due to a reduction in workforce between the comparative periods. Selling, general, and administrative Selling, general, and administrative expense decreased $7.0 million, or 13% compared to the prior comparative period.
This was offset by an increase of $2.7 million in stock-based compensation related to the vesting of Tranche I stock appreciation rights, a $2.7 million increase in retention bonus expense, and a $1.5 million increase in severance expense. Selling, general, and administrative Selling, general, and administrative expense decreased $6.7 million, or -9% compared to 2024.
We focus on monetizing user traffic acquired by our Network Partners. Since launching, it has expanded to support additional advertising formats across multiple advertising platforms, and has acquired several leading websites, enabling it to control the entire flow of the user acquisition experience, while monetizing user traffic through our network of owned and operated websites.
We monetize user traffic we acquire directly from various marketing channels, across multiple advertising platforms, and have acquired several leading websites, enabling us to control user acquisition and experience, and monetize user traffic on our behalf via our network of products.
As of December 31, 2024 , we had unrestricted cash and cash equivalents of $63.6 million and $50.0 million available to borrow on our 2022 Revolving Facility. For the year ended December 31, 2024 , we had cash outflows of $75.5 million.
For the year ended December 31, 2025, we had cash inflows of $20.6 million, 57 attributable to the draw down of our revolver facility. Without the draw down of our revolver facility, we would have had cash outflows for the year ended December 31, 2025.
Net cash used for working capital was $2.9 million In the year ended December 31, 2023, cash provided by operating activities of $24.7 million resulted primarily from a net loss of $285.6 million, payment of long term earnout liabilities of $20.0 million, a decrease in accrued expenses and other current liabilities of $19.4 million and a noncash tax benefit of $22.3 million.
In the year ended December 31, 2025, cash used in operating activities of $4.1 million resulted primarily from a net loss of $81.2 million, offset by $96.0 million of non-cash items, comprised of $82.9 million depreciation and amortization expense, $11.3 million stock based compensation expense and $3.4 million shared based compensation liability.
Changes in estimates are recorded in periods when they become known.
Changes in estimates are recorded in periods when they become known. However, actual results from the resolution of such estimates and assumptions may vary from those used in the preparation of the consolidated financial statements.
For the year ended December 31, 2024, compared to prior year, sessions increased 4,487 million to 7,777 million from 3,290 million, and Network RPS decreased by approximately $0.01 to $0.01 from $0.02. The declines in Network RPS are primarily due to a mix shift to lower RPS traffic.
Products Products revenue increased $12.7 million, or 16%, for the year ended December 31, 2025 as compared to 2024, primarily due to an increase in product sessions. For the year ended December 31, 2025, compared to 2024, Products sessions increased by approximately 278.9 million to 2.2 billion from 1.9 billion while Products RPS remained flat at $0.04.
Salaries and benefits . Salaries and benefits expenses include salaries, bonuses, stock-based compensation, and employee benefits costs. Selling, general, and administrative . Selling, general, and administrative expenses consist of fees for software services, professional services, occupancy costs and travel and entertainment. These costs are expensed as incurred. Depreciation and amortization .
Amortization related to our platform is recognized over the estimated useful life of the intangible asset. 51 Salaries and benefits . Salaries and benefits expenses include salaries, bonuses, stock-based compensation, and employee benefits costs. Selling, general, and administrative .