Investor Presentaiton

• • Q4 2021 HIGHLIGHTS Record backlog of $290 million including confirmed orders 1 Q4 2021 backlog marks 14th consecutive quarter with a backlog exceeding $200 million Completed acquisition of ParkUSA on October 5, 2021 SPP Backlog¹ ($ Millions) Net Sales by Segment² ($ Millions) $290 $276$270 $258 $273 $58.1 $224 $246$231$221 $210 $234 $11.3 $71.6 $31.0 Q2'19 Q4'19 Q2'20 Q4'20 Q2'21 Q4'21 Q4 2020 Q4 2021 ■SPP Precast Gross Profit by Segment ($ Millions) $10.9 $8.7 $1.5 Q4 2020 $4.9 Q4 2021 SPP Precast Note: Precast refers to Precast Infrastructure and Engineered Systems & SPP refers to Engineered Steel Pressure Pipe. 1. Backlog includes confirmed orders (projects for which the Company has been notified that it is the successful bidder, but a binding agreement has not been executed. 2. Precast net sales for Q4 2021 include an $18.0 million contribution from the acquired ParkUSA operations. 16

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