X0306 4 2023-02-22 0000906553 BOYD GAMING CORP BYD 0001186738 BOYD WILLIAM R 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 1 1 0 0 Vice President Common Stock 2023-02-22 4 A 0 3291 0 A 1706041 I By Trust Common Stock 12990 D Common Stock 41398 I By Trust* The Reporting Person was awarded 3,291 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 22, 2026. 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. By the William R. Boyd Gaming Properties Trust, of which the reporting person is the trustee, settlor and beneficiary. By the Sean W. Johnson Education Trust, dated July 1, 1997, of which the reporting person is the trustee. * 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 William R. Boyd. 2023-02-24