Dropbox Investor Presentation Deck

Non-GAAP reconciliation Gross profit Gross margin Research and development Research and development margin Sales and marketing Sales and marketing margin General and administrative General and administrative margin Impairment related to real estate assets Impairment related to real estate assets margin Income (loss) from operations Operating margin Note: % may not foot due to rounding $ GAAP 1,499.3 78.3 % 727.5 38.0 % 422.8 22.1% 227.8 11.9% 398.2 20.8% (277.0) (14.5%) $ Stock based compensation 17.1 0.9 % (174.1) (9.1%) (33.7) (1.8%) (36.6) (1.9%) 261.5 13.7 % Twelve Months Ended - 2020 Acquisition- related and other expenses $ (16.8) (0.9%) (0.1) 16.9 0.9 % Amortization of acquired intangible assets 3.9 0.2% $ (5.6) (0.3%) I 9.5 0.5% $ Impairment related to real estate assets (398.2) (20.8%) 398.2 20.8% $ Non-GAAP 1,520.3 79.4 % 536.6 28.0% 383.5 20.0 % 191.1 10.0 % - % 409.1 21.4% 36

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