X0609 4 2026-04-23 0 0000874238 STERLING INFRASTRUCTURE, INC. STRL 0001671928 CUTILLO JOSEPH A false 1800 HUGHES LANDING BLVD. THE WOODLANDS TX 77380 0 1 0 0 Chief Executive Officer 1 Common Stock 2026-04-23 4 S 0 50000 497.5727 D 290593 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 8, 2025. Transaction executed in multiple trades at prices ranging from $495.00 to $501.68 per share, inclusive. The price reported in column 4 above reflects the average sale price per share. The Reporting Person hereby undertakes to provide the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Of these shares, 20,754 shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances. Mark D. Wolf (Under a Power of Attorney) 2026-04-24