X0508 4 2024-02-28 0000906553 BOYD GAMING CORP BYD 0000940434 BOYD WILLIAM S 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 0 0 1 0 0 Common Stock 2024-02-28 4 A 0 28146 0 A 9494985 I By Trust Common Stock 2024-02-28 4 F 0 11072 63.96 D 9483913 I By Trust Common Stock 4004000 I By Trust Common Stock 186617 I By Spouse* Represents shares underlying Performance Share Units that vested on February 28, 2024. By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary. By The WSB SS Irrevocable Trust, of which the reporting person is the settlor and beneficiary. * 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 S. Boyd. 2024-03-01