Exhibit 99.1

Joint Filer Information

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: ASP BB Investco LP c/o American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022 10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: American Securities Partners VII, L.P. c/o American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022 10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: American Securities Partners VII(B), L.P. c/o American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022 10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: American Securities Partners VII(C), L.P. c/o American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022 10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: American Securities Associates VII, LLC c/o American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022 10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC

Name of Joint Filer: Address:     Relationship of Joint Filer to Issuer: Issuer Name and Ticker or Trading Symbol: Date of Earliest Transaction Required to be Reported   (Month/Day/Year): Designated Filer: American Securities LLC 590 Madison Avenue, 38th Floor New York, NY 10022   10% Owner Blue Bird Corporation [BLBD]   December 19, 2023 ASP BB Holdings LLC