# EDGAR Filing Document

**Accession Number:** 0001589526
**File Stem:** 0001140361-26-002271
**Filing Date:** 2026-1
**Character Count:** 2164
**Document Hash:** 32eba1d8f3894f813c06964791d98a6a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-002271.hdr.sgml**: 20260126

**ACCESSION NUMBER**: 0001140361-26-002271

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260126

**DATE AS OF CHANGE**: 20260126

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Blue Bird Corp
- **CENTRAL INDEX KEY:** 0001589526
- **STANDARD INDUSTRIAL CLASSIFICATION:** TRUCK & BUS BODIES [3713]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 463891989
- **FISCAL YEAR END:** 0927

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36267
- **FILM NUMBER:** 26558363

**BUSINESS ADDRESS:**
- **STREET 1:** 3920 ARKWRIGHT ROAD
- **STREET 2:** SUITE 200
- **CITY:** MACON
- **STATE:** GA
- **ZIP:** 31210
- **BUSINESS PHONE:** 478-822-2801

**MAIL ADDRESS:**
- **STREET 1:** 3920 ARKWRIGHT ROAD
- **STREET 2:** SUITE 200
- **CITY:** MACON
- **STATE:** GA
- **ZIP:** 31210

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Hennessy Capital Acquisition Corp.
- **DATE OF NAME CHANGE:** 20131017

### UNITED STATES <br>

### SECURITIES AND EXCHANGE COMMISSION <br>

#### Washington, D.C. 20549

### SCHEDULE 14A

#### Schedule 14A Information

#### Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 <br>

#### (Amendment No.)
Filed by the Registrant ☑

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐<br> Preliminary Proxy Statement

☐<br> Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐<br> Definitive Proxy Statement

☑<br> Definitive Additional Materials

☐<br> Soliciting Material Pursuant to §240.14a-12

### Blue Bird Corporation <br>

#### (Name of registrant as specified in its charter)

#### (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check all boxes that apply):

☑<br> No fee required.

☐<br> Fee paid previously with preliminary materials.

☐<br> Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a(6)(i)(1) and 0-11.

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