X0508 4 2026-02-19 0000906553 BOYD GAMING CORP BYD 0001186757 SMITH KEITH 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 1 1 0 0 President and CEO 0 Common Stock 2026-02-19 4 A 0 42730 0.00 A 1039419 D Common Stock 2026-02-22 4 A 0 63188 0.00 A 1102607 D Common Stock 2026-02-22 4 F 0 41234 86.20 D 1061373 D Common Stock 325 I By Spouse The Reporting Person was awarded 42,730 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting. The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan Represents shares underlying Performance Share Units that vested on February 22, 2026 /s/ Uri Clinton, attorney-in-fact for Keith Smith 2026-02-23