Pinterest Results Presentation Deck

Cost of Revenue 18% 127 Q420 S&M 15% 109 Non-GAAP costs and expenses (in millions) Q420 27% 132 Q121 24% 118 Q121 20% 126 Q221 25% 150 Q221 % of revenue 20% 125 Q321 23% 143 16% % of revenue Q321 139 Q421 21% 177 Q421 R&D 14% 102 Q420 G&A 11% 76 Q420 24% 115 Q121 9% 42 Q121 18% 111 Q221 9% 55 Q221 — 19% 118 % of revenue Q321 8% 52 15% Q321 126 Q421 % of revenue 7% 61 Q421 Note: Costs and expenses are non-GAAP financial measures, which exclude share-based compensation (SBC), amortization of acquired intangible assets, and non-cash charitable contributions. For a reconciliation of these non-GAAP financial measures to the most directly comparable GAAP financial measures, please see the tables included in the Appendix at the end of this release. 2022 Pinterest. All rights reserved. +9% COR Y/Y +24% R&D Y/Y +63% S&M Y/Y (21)% G&A Y/Y 6

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