Capital Markets Overview

Diverse & Resilient Business Model Construction Q3 2021 TTM Revenue Q3 2021 TTM EBITDA $3,907 M + $241 M +@ Concessions Q3 2021 TTM Revenue $104 M Q3 2021 TTM EBITDA + $63 M +@ Roads and Highways 13%* Heavy Civil 14%* +4 Urban Transportation Systems 18%* M ACCON PINN HOP Utilities 17%* SKYPORT BERMUDA AIRPORT 100%^ MOSAIC FINCH WEST LRT 33%^ TRANSIT GROUP CROSSLIN TRANSIT SOLUTIONS EGLINTON LRT 25%^ Industrial 23%* BRIDGING NORTHAMERICA GORDIE HOWE INTERNATIONAL BRIDGE GRANDLINQ CONTRACTORS Nuclear Power 15%* Before corporate costs and eliminations * % of Q3 2021 TTM Revenue ^% of Aecon equity ownership in the concessionaire This is a non-GAAP financial measure. Refer to Section 4 "Non-GAAP And Supplementary Financial Measures" in the Company's Q3 2021 MD&A. 20%^ WATERLOO 10%^ LRT 4

View entire presentation