13D Filing: Coliseum Capital and Blue Bird Corp (BLBD)

CUSIP No. 095306106 (Common Stock)

Item 6. Contracts, Arrangement, Understandings or Relationships with Respect to Securities of the
Issuer.

CCM is an investment adviser whose clients, including CCP, CCP2 and the Separate Account, have the right to receive or the power to direct the
receipt of dividends from, or the proceeds from the sale of, the Common Shares, the Series A Shares and the Warrants. CC is the general partner of CCP and CCP2. Gray and Shackelton are the managers of CC and CCM. CCM may have the right to receive
performance-related fees from the Separate Account and CC may have the right to receive performance-related fees from CCP and CCP2.

Item 6 of the
Schedule 13D is hereby amended and supplemented. The information set forth in Item 4 of this Amendment is hereby incorporated by reference in this Item 6.

Item 7. Materials to be filed as Exhibits.

1.
Exhibit 99.1 Securities Purchase Agreement, dated September 23, 2017, by and between Coliseum Capital Partners, L.P., Coliseum Capital Partners II, L.P., Blackwell Partners, LLC Series A, and Coliseum School Bus Holdings, LLC and
Blue Bird Corporation.

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