Sterling Results Presentation Deck

34 Appendix -Non-GAAP to GAAP Reconciliation Organic constant currency revenue growth The following table reconciles reported revenue growth, the most directly comparable GAAP measure, to organic constant currency revenue growth for the three months and year ended December 31, 2021. Reported revenue grow th Impact from M&A activity (1) Impact from foreign currency exchange (2) Organic constant currency revenue grow th Three Months Ended December 31, 2021 35.1 % 2.3 % 0.5 % 32.3 % Year Ended December 31, 2021 41.4 % 0.7 % 1.7 % 39.0 % (1) Impact to revenue growth in the current period from acquisitions and dispositions that have occurred over the past 12 months (2) Impact to revenue growth in the current period from fluctuations in foreign currency exchange rates Sterling

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