144 0001671928 XXXXXXXX LIVE 0000874238 STERLING INFRASTRUCTURE, INC. 001-31993 1800 Hughes Landing Blvd The Woodlands , TX 77380 281-214-0783 JOSEPH ANTHONY CUTILLO Officer COMMON Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

50000 22308000.00 30644110 03/25/2026 NASDAQ Common 12/31/2023 Restricted Stock Units Issuer N 50000 12/31/2023 N/A N 10b5-1 Sales for JOSEPH ANTHONY CUTILLO

1800 Hughes Landing Blvd The Woodlands , TX 77380

COMMON 03/10/2026 47592 19808280.60 10b5-1 Sales for JOSEPH ANTHONY CUTILLO

1800 Hughes Landing Blvd The Woodlands , TX 77380

COMMON 03/09/2026 52408 21404365.30 The securities to be sold were acquired upon the vesting of restricted stock units during the period of 12/31/2023 through 02/27/2024 03/25/2026 12/08/2025 /s/ Joseph Anthony Cutillo