X0508 4 2026-02-26 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 2026-02-26 4 M 0 23924 17.75 A 459670 D Common Stock 2026-02-26 4 S 0 23924 85.86 D 435746 D Common Stock 20500 I By Spouse* Employee Stock Option (right to buy) 17.75 2026-02-26 4 M 0 23924 0 D 2026-03-12 Common Stock 23924 0 D Options granted under Boyd Gaming Corporation's 2012 Stock Incentive Plan. Vesting plan calls for options to become exercisable at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date of November 8, 2016. This transaction was executed in multiple trades at prices ranging from $85.17 to $86.19 The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. * 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 2026-03-02