Blue Bird Corp 10-Q

Item 5. Other Information. (c) On March 4, 2026, Razvan Radulescu, the Company's Chief Financial Officer, entered into a new trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, providing for the sale of up to 9,400 shares of the Company's common stock. Pursuant to this plan, Mr. Radulescu may sell shares beginning December 10, 2026 and ending December 15, 2026. During the second quarter of fiscal 2026, none of the Company's other directors or officers adopted or terminated any "Rule 10b5-1 trading arrangement" or any "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408 of Regulation S-K. 36 Item 6. Exhibits. The following Exhibits are filed with this Report: Exhibit No. Description 2.1 Share Purchase Agreement dated as of February 15, 2026, by and among Blue Bird Corporation, by and through its wholly-owned subsidiary, Blue Bird Body Company, and (i) the AG 2014 Trust, the SG One 2014 Trust, and the DG One 2014 Trust and (ii) Groupe Autobus Girardin Ltée and Girardin Minibus JV 2 Inc. (the schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company undertakes to include supplemental copies of any of the omitted exhibit or schedules upon request by the SEC) (incorporated by reference to Exhibit 2. 1 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on February 17, 2026). 2.2 Form of Exchange and Support Agreement by and among Groupe Autobus Girardin Ltée, Blue Bird Corporation, MB CallCo Inc. and MB ExchangeCo Inc (incorporated by reference to Exhibit 2. 2 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on February 17, 2026). 2.3 Form of Board Election Agreement by and between Blue Bird Corporation and Groupe Autobus Girardin Ltée (incorporated by reference to Exhibit 2.3 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on February 17, 2026 ) . 3.1 The registrant’s Second Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on February 26, 2015). 3.2* Certificate of Amendment (dated March 11, 2026) to registrant’s Second Amended and Restated Certificate of Incorporation . 3.3 Certificate of Designation of Special Voting Preferred Stock (incorporated by reference to Exhibit 3.1 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on April 2, 2026). 3.4 The registrant's Bylaws, as amended, effective February 2, 2023 (incorporated by reference to Exhibit 3.2 to the registrant's Current Report on Form 8-K, filed by the registrant with the SEC on February 3, 2023). 10.1*† Blue Bird Corporation Amended and Restated 2015 Omnibus Equity Incentive Plan, effective November 21, 2025 . 10.2*† Employment Agreement effective January 1, 2026, between Jeff Sanfrey and Blue Bird Corporation. 31.1* Chief Executive Officer’s Certification Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934. 31.2* Chief Financial Officer’s Certification Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934. 32.1* Chief Executive Officer and Chief Financial Officer Joint Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.INS*^ XBRL Instance Document 101.SCH*^ XBRL Taxonomy Extension Schema Document 101.CAL*^ XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF*^ XBRL Taxonomy Extension Definition Linkbase Document 101.LAB*^ XBRL Taxonomy Extension Label Linkbase Document 101.PRE*^ XBRL Taxonomy Extension Presentation Linkbase Document 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) * Filed herewith. † Management contract or compensatory plan or arrangement. ^ In accordance with Regulation S-T, XBRL (Extensible Business Reporting Language) related information in Exhibit No. 101 to this Quarterly Report on Form 10-Q shall be deemed “furnished” and not “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any registration statement pursuant to the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. 37 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Blue Bird Corporation Dated: May 6, 2026 /s/ John Wyskiel John Wyskiel President and Chief Executive Officer Dated: May 6, 2026 /s/ Razvan Radulescu Razvan Radulescu Chief Financial Officer 38