Q4 and Full-Year 2020 Financial Performance

9 Q4 2020 STN TSX-NYSE Canada $1,500 $1,000 Gross and net revenue ($ millions) Backlog $1,283 $1,239 $1,110 $1,074 $1.1 $500 $336 $319 $273 $267 $0 Q4 2019 Q4 2020 2019 2020 Gross Revenue Net Revenue Billion Q4 Project Wins ● 2 3 hospitals for $53 million in net revenue Including St Paul's Hospital in Vancouver, British Columbia Geotechnical Surveillance - Energy & Resources For $33 million in net revenue • 360 Transit Alliance A joint venture overseeing an estimated $28.5 billion in capital investment in Toronto's transit infrastructure Brentwood Town Centre - Phase One Burnaby, British Columbia, Canada

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