Sterling Results Presentation Deck

Appendix - Non-GAAP to GAAP Reconciliation Adjusted EBITDA and Adjusted EBITDA Margin Reconciliation Net (loss) income Income tax (benefit) provision Interest expense, net Depreciation & amortization Stock-based compensation Transaction costs (1) Restructuring (2) (3) Technology Transformation Settlements impacting comparability Gain (loss) on interest rate swaps Other (6) Adjusted EBITDA Net (loss) income Adjusted EBITDA Revenues Net (loss) income margin Adjusted EBITDA margin 28 (5) (4) March 31, 2020 June 30, 2020 $ (15,900) $ (3,556) 9,056 22,935 545 538 526 3,009 97 8,755 1,584 27,590 $ March 31, 2020 $ For the three months ended September 30, 2020 December 31, 2020 March 31, 2021 (24,947) $ (10,385) $ (1,060) $ 5,727 (1,453) (12,280) 8,237 7,817 7,837 22,643 22,863 22,758 570 1,708 539 1,406 1,060 1,768 2,581 2,872 2,662 (15,900) $ 27,590 119,376 (13.3%) 23.1% 641 546 5,484 2,458 43 899 (611) 13,940 $ June 30, 2020 120 (49) (439) 30,404 $ September 30, 2020 (24,947) $ 13,940 88,571 (28.2%) 15.7% (10,385) $ 30,404 117,602 (8.8%) 25.9% (153) 383 27,901 $ For the three months ended December 31, 2020 March 31, 2021 (1,060) $ 27,901 128,503 June 30, 2021 628 $ 526 7,570 20,549 898 1,089 3,035 2,059 (0.8%) 21.7% (46) 496 36,803 $ 0.5% 26.4% 3,398 $ 4,026 7,603 20,299 756 6,169 574 3,942 June 30, 2021 628 $ 36,803 139,370 September 30, 2021 December 31, 2021 (25,256) $ 2,704 (12,633) (2,381) 7,668 8,016 133 134 47,034 $ 47,034 159,328 2.1% 29.5% 3,398 $ 20,346 25,582 31,513 634 3,137 112 196 51,300 $ September 30, 2021 December 31, 2021 2,704 44,049 173,629 1.6% 25.4% (25,256) $ 51,300 169,557 20,871 5,344 4,292 655 (14.9%) 30.3% 3,950 468 (168) 298 44,049 Sterling

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