X0508 4 2024-02-28 0000906553 BOYD GAMING CORP BYD 0001421390 Hirsberg Josh 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 0 1 0 0 CFO & Treasurer 0 Common Stock 2024-02-28 4 A 0 28146 0 A 443330 D Common Stock 2024-02-28 4 F 0 11072 63.96 D 432258 D Common Stock 2024-02-28 4 A 0 17477 0 A 449735 D Common Stock 20500 I By Spouse* Represents shares underlying Performance Share Units that vested on February 28, 2024. The Reporting Person was awarded 17,477 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 will vest in full on February 28, 2027. 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 * The reporting person expressly disclaims beneficial ownership of any securities of the Issuer except for those securities that are owned directly by the Reporting Person or to the extent of the Reporting Person's pecuniary interest in a trust or other entity which owns such securities. /s/ Uri Clinton, attorney-in-fact for Josh Hirsberg 2024-03-01