ironSource Results Presentation Deck

Disclaimer Key Performance Metrics and Non-GAAP Financial Measures ironSource monitors the key business metrics set forth in this presentation to help evaluate the business and growth trends, establish budgets, measure the effectiveness of sales and marketing efforts, and assess operational efficiencies. The calculation of the key metrics discussed in this presentation may differ from other similarly titled metrics used by other companies, securities analysts or investors. Also included in this presentation are certain non-GAAP financial measures, including Adjusted EBITDA and Adjusted EBITDA Margin, which are designed to complement the financial information presented in accordance with GAAP, because ironSource management believes such measures are useful to investors. See the Appendix to this presentation for a reconciliation of the non-GAAP financial measures to the nearest GAAP measure, which should be carefully evaluated. Customers Contributing More than $100,000 of Revenue ironSource's larger customer relationships drive scale, improved unit economics and operating leverage in its business model, which improves ironSource's solutions and thereby increases the value proposition to all of ironSource's customers. To measure ironSource's ability to scale with its customers and attract large enterprises to its platform, ironSource counts the number of customers that contributed more than $100,000 in revenue in the trailing 12 months. ironSource's gross customer retention rate is calculated by comparing two twelve-month periods to see how many customers in the previous period remain active customers in the current period. ironSource's customer count is subject to adjustments for acquisitions, consolidations, spin-offs and other market activity. Dollar-Based Net Expansion Rate ironSource believes the growth in the use of its platform by existing customers is an important measure of the health of its business and future growth prospects. ironSource monitors its performance in this area using an indicator management refers to as dollar-based net expansion rate. ironSource calculates dollar-based net expansion rate for a period by dividing current period revenue from a set of customers by prior period revenue of the same set of customers. Prior period revenue is the trailing 12-month revenue measured as of such prior period end. Current period revenue is the trailing 12-month revenue from the same customers as of the current period end. Management's calculation of dollar-based net expansion rate includes the effect of any customer renewals, expansion, contraction and churn, but excludes revenue from new customers. IS ironSource

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