GAAP to Non-GAAP Costs and Expenses Reconciliation

GAAP to non-GAAP costs and expenses reconciliation (in millions) Quarter ended September 30, 2022 GAAP Share-based compensation Amortization Other expense Non-GAAP Cost of revenue $182.6 $2.2 $2.0 $0.0 $178.4 Research and development 254.7 89.7 0.0 0.0 165.0 Sales and marketing 229.9 23.3 3.4 0.0 203.2 General and administrative 86.8 21.0 0.2 0.0 65.6 Total costs and expenses $753.9 $136.2 $5.5 $0.0 $612.2 P Note: Totals may not sum due to rounding. © 2023 Pinterest. All rights reserved. 14

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