BOYD GAMING CORP 10-Q

Item 5. Other Information None of the Company’s directors or officers adopted, modified or terminated a Rule 10b5 - 1 trading arrangement or a non-Rule 10b5 - 1 trading arrangement during the Company’s fiscal quarter ended June 30, 2025 , as such terms are defined under Item 408 (a) of Regulation S-K. 38 Table of Contents Item 6. Exhibits Exhibit Number Document of Exhibit Method of Filing 2.1 Equity Purchase Agreement, entered into on July 10, 2025, by and among FanDuel Group Parent, LLC, a Delaware limited liability company, TSE Holdings Ltd., and Boyd Interactive Gaming Holdings, L.L.C., a Nevada limited liability company. Incorporated by reference to Exhibit 2.1 of the Registrant's Current Report on Form 8-K, filed with the SEC on July 15, 2025. 22 List of Guarantor Subsidiaries of Boyd Gaming Corporation. Incorporated by reference to Exhibit 22 of the Registrant's Quarterly Report on Form 10-Q, filed with the SEC on May 2, 2025. 31.1 Certification of the Chief Executive Officer of the Registrant pursuant to Exchange Act rule 13a-14(a). Filed electronically herewith 31.2 Certification of the Chief Financial Officer of the Registrant pursuant to Exchange Act rule 13a-14(a). Filed electronically herewith 32.1 Certification of the Chief Executive Officer of the Registrant pursuant to Exchange Act Rule 13a-14(b) and 18 U.S.C. § 1350. Furnished electronically herewith 32.2 Certification of the Chief Financial Officer of the Registrant pursuant to Exchange Act Rule 13a-14(b) and 18 U.S.C. § 1350. Furnished electronically herewith 101 The following materials from the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2025, formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) Condensed Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024, (ii) Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2025 and 2024, (iii) Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2025 and 2024, (iv) Condensed Consolidated Statements of Changes in Stockholders' Equity for each of the quarters within the six months ended June 30, 2025 and 2024, (v) Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2025 and 2024, and (vi) Notes to Condensed Consolidated Financial Statements. Filed electronically herewith 104 Inline XBRL for cover page of the Company's Quarterly Report on Form 10-Q, included in the Exhibit 101 Inline XBRL Document Set. Filed electronically herewith 39 Table of Contents SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities and Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized , o n July 30, 2025 . BOYD GAMING CORPORATION By: /s/ Lori M. Nelson Lori M. Nelson Senior Vice President Financial Operations and Reporting and Chief Accounting Officer 40