Pinterest Results Presentation Deck

GAAP to non-GAAP costs and expenses reconciliation (in millions) Cost of revenue Research and development Sales and marketing General and administrative Total costs and expenses Cost of revenue Research and development Sales and marketing General and administrative Total costs and expenses GAAP $141.2 240.9 190.5 94.6 $667.2 GAAP $126.8 185.9 156.1 65.7 $534.5 Quarter ended December 31, 2021 Share-based compensation $1.9 115.0 13.4 9.0 $139.4 Quarter ended September 30, 2021 Share-based compensation Amortization $0.3 0.0 0.0 0.2 $0.5 $2.0 67.5 13.4 13.4 $96.3 Amortization $0.1 0.0 0.0 0.2 $0.3 Note: Totals may not sum due to rounding. © 2022 Pinterest. All rights reserved. 1: Other expense is comprised of non-cash charitable contributions. Other expense $0.0 0.0 0.0 24.81 24.8 Other expense $0.0 0.0 0.0 0.0 0.0 Non-GAAP $139.0 125.8 177.1 60.6 $502.5 Non-GAAP $124.7 118.5 142.7 52.1 $437.9 9

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