Blue Bird Corp

(a) Index

(1) Financial Statements.

The following financial statements are located in Item 8 of this Annual Report on Form 10-K:

Consolidated Balance Sheets at September 27, 2025 and September 28, 2024

Consolidated Statements of Operations for the fiscal years ended September 27, 2025, September 28, 2024 and September 30, 2023

Consolidated Statements of Comprehensive Income for the fiscal years ended September 27, 2025, September 28, 2024 and September 30, 2023

Consolidated Statements of Stockholders' Equity for the fiscal years ended September 27, 2025, September 28, 2024 and September 30, 2023

Consolidated Statements of Cash Flows for the fiscal years ended September 27, 2025, September 28, 2024 and September 30, 2023

Notes to Consolidated Financial Statements

(2) Financial Statement Schedules.

Financial Statement Schedule II - Valuation and Qualifying Accounts

All other schedules are not required under the related instructions or are not applicable.

(3) Exhibits. See paragraph (b) below.

(b) Exhibits

Exhibit No. Description

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 on February 26, 2015).

3.2 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 on February 3, 2023).

4.1 Specimen stock certificate for the registrant’s common stock (incorporated by reference to Exhibit 4.1 to the registrant’s Current Report on Form 8-K filed by the registrant on March 2, 2015).

4.2 Credit Agreement, dated as of November 17, 2023, by and among the Company, School Bus Holdings, Inc. and certain of its subsidiaries, including Blue Bird Body Company as the borrower, Bank of Montreal, as Administrative Agent and certain other financial institutions party thereto (incorporated by reference to Exhibit 10.1 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on November 20, 2023).

4.3 Form of Warrant to Purchase Common Stock of Blue Bird Corporation, dated November 14, 2024, issued by Blue Bird Corporation with an Expiration Date of December 7, 2028 (incorporated by reference to Exhibit 4.2 to the registrant’s Registration Statement on Form S-3ASR filed by the registrant on December 23, 2024, File No. 333-284017).

4.4 Form of Warrant to Purchase Common Stock of Blue Bird Corporation, dated as of November 14, 2024, issued by Blue Bird Corporation with an Expiration Date of August 8, 2029 (incorporated by reference to Exhibit 4.3 to the registrant’s Registration Statement on Form S-3ASR filed by the registrant on December 23, 2024, File No. 333-284017).

4.5*Description of the registrant's securities.

10.1† Blue Bird Corporation Amended and Restated 2015 Omnibus Equity Incentive Plan (the “Incentive Plan”) (incorporated by reference to Appendix A to the registrant’s definitive Proxy Statement, as filed on January 27, 2020).

10.2† Revised form of grant agreement for non-qualified stock options granted under the registrant's Incentive Plan (incorporated by reference to Exhibit 10.8 to the registrant's Annual Report on Form 10-K filed by the registrant on December 12, 2019).

10.3† Revised form of grant agreement for restricted stock units granted under the registrant's Incentive Plan (incorporated by reference to Exhibit 10.9 to the registrant’s Annual Report on Form 10-K filed by the registrant on December 12, 2019).

10.4† Form of Restricted Stock Unit Grant Agreement for directors under the registrant’s Incentive Plan (incorporated by reference to Exhibit 10.1 to the registrant’s Quarterly Report on Form 10-Q/A filed by the registrant on August 18, 2015).

10.5†Revised form of grant agreement for non-qualified stock options granted to employees under the registrant’s Incentive Plan (incorporated by reference to Exhibit 10.2 to the registrant’s Quarterly Report on Form 10-Q filed by the registrant on February 13, 2020).

10.6† Revised form of grant agreement for restricted stock units granted to employees under the registrant’s Incentive Plan (incorporated by reference to Exhibit 10.3 to the registrant’s Quarterly Report on Form 10-Q filed by the registrant on February 13, 2020).

10.7 Credit Agreement, dated as of November 17, 2023, by and among the Company, School Bus Holdings, Inc. and certain of its subsidiaries, including Blue Bird Body Company as the borrower, Bank of Montreal, as Administrative Agent and certain other financial institutions party thereto (incorporated by reference to Exhibit 10.1 to the registrant’s Current Report on Form 8-K, filed by the registrant with the SEC on November 20, 2023).

10.8†Change in Control Plan, effective as of January 25, 2024 (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 8, 2024).

10.9†Omnibus Amendment to Outstanding Stock Option and Restricted Stock Unit Awards Under the Amended and Restated Blue Bird Corporation 2015 Omnibus Equity Incentive Plan, effective as of January 25, 2024 (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 8, 2024).

10.10†Employment Agreement effective May 15, 2023, between Phil Horlock and Blue Bird Corporation (incorporated by reference to Exhibit 10.3 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 8, 2024).

10.11†Employment Agreement effective October 1, 2023, between Razvan Radulescu and Blue Bird Corporation (incorporated by reference to Exhibit 10.5 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 8, 2024).

10.12†Employment Agreement effective October 1, 2023, between Ted Scartz and Blue Bird Corporation (incorporated by reference to Exhibit 10.6 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 8, 2024).

10.13 Amended and Restated Limited Liability Company Agreement of Clean Bus Solutions, LLC, dated as of August 8, 2024, by and among Blue Bird Body Company, Clean Bus Solutions, LLC, and GC Mobility Investments I, LLC (portions of the exhibit have been omitted) (incorporated by reference to Exhibit 10.29 to the registrant's Annual Report on Form 10-K filed by the registrant on November 25, 2024).

10.14 Form of Warrant to Purchase Common Stock of Blue Bird Corporation, dated November 14, 2024, issued by Blue Bird Corporation with an Expiration Date of December 7, 2028 (incorporated by reference to Exhibit 4.2 to the registrant’s Registration Statement on Form S-3ASR filed by the registrant on December 23, 2024, File No. 333-284017).

10.15 Form of Warrant to Purchase Common Stock of Blue Bird Corporation, dated as of November 14, 2024, issued by Blue Bird Corporation with an Expiration Date of August 8, 2029 (incorporated by reference to Exhibit 4.3 to the registrant’s Registration Statement on Form S-3ASR filed by the registrant on December 23, 2024, File No. 333-284017).

10.16†Employment Agreement effective February 17, 2025, between John Wyskiel and Blue Bird Corporation (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 7, 2025).

10.17†Summary of Retirement Package for Philip Horlock, effective February 28, 2025 (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q filed by the registrant on May 7, 2025).

10.18* Revised form of indemnity agreement between the registrant and each of its directors and executive officers.

19.1 Registrant's Insider Trading Policy and Guidelines for Rule 10b5-1 Plans (incorporated by reference to Exhibit 19.1 to the registrant's Annual Report on Form 10-K filed by the registrant on December 11, 2023).

21.1* Subsidiaries of the registrant.

23.1* Consent of BDO USA, P.C.

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’s Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2* Chief Financial Officer’s Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

97.1 Registrant's Policy Relating to Recovery of Erroneously Awarded Compensation (incorporated by reference to Exhibit 97.1 to the registrant's Annual Report on Form 10-K filed by the registrant on December 11, 2023).

101* The following materials from the Company's Annual Report on Form 10-K for the fiscal year ended September 27, 2025 formatted in XBRL (eXtensible Business Reporting Language) and furnished electronically herewith: (i) Consolidated Balance Sheets; (ii) Consolidated Statements of Operations; (iii) Consolidated Statements of Comprehensive Income (Loss); (iv) Consolidated Statements of Stockholders' (Deficit) Equity; (iv) Consolidated Statements of Cash Flows; and (v) Notes to the Consolidated Financial Statements.

104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

*Filed herewith.

†Management contract or compensatory plan or arrangement.

(c) Not applicable.