Leaders in Sustainability

16 Q1 2022 STN TSX-NYSE Solid Q1 2022 earnings Net Revenue $1,050 M ▲ 19.5% Adj EBITDA (1) | Margin $152M 14.5% EPS Adj Diluted (1) | Diluted $0.61 $0.40 | | | ▲ 17.9% ▲ 22.0% (Adjusted) KEY DRIVERS Re-shoring of strategic domestic production to strengthen local supply chain resilience Increased earnings on the strength of: ● 6.4% organic net revenue growth (1) 13.9% acquisition net revenue growth (1) • 54.0% project margin (1) Adjusted diluted EPS, Adjusted EBITDA, organic growth, and acquisition growth are non-IFRS and other financial measures (discussed in the Definitions section of Stantec's Q1 2022 Quarter Report) Climate change and sustainability Global food security Energy transition

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