Investor Presentaiton

STN TSX-NYSE Global Q4 AND YEAR END 2023 00 8 Gross and net revenue ($ millions) $1,419 $1,284 $1,136 $1,040 $1.0 Billion $334 $349 $261 $273 BACKLOG Q4 2022 Q4 2023 2022 2023 Gross Revenue Net Revenue 6.5% organic growth & 1.1% acquisition growth Double-digit organic growth in: • • Water - long-term framework agreements in UK, New Zealand and Australia, and public sector investment Energy & Resources - major energy storage project in UK and mining activities. to support the energy transition New City West Bus Layover Turner, ACT, Australia

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