Investor Presentaiton

Q4 AND YEAR END 2023 STN TSX NYSE Liquidity and capital resources Operating cash flow ($ millions) Capital returned to shareholders ($ millions) $210 $545 $304 $264 $65 $10 $78 $85 Q4 2022 Q4 2023 2022 2023 $20 Q4 2022 $22 Q4 2023 2022 2023 Dividends Share Buybacks Dividends Share Buybacks Days sales outstanding(1) 81 Target 80 days 77 2022 2023 Net debt to adjusted EBITDA(1) 1.6 Target range 1.0 - 2.0x 1.0 2022 2023 12 (1) Net debt to adjusted EBITDA and days sales outstanding are non-IFRS measures (discussed in the Definitions section of Stantec's 2023 Annual Report).

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