<SEC-DOCUMENT>0001589526-15-000028.txt : 20150602
<SEC-HEADER>0001589526-15-000028.hdr.sgml : 20150602
<ACCEPTANCE-DATETIME>20150602135017
ACCESSION NUMBER:		0001589526-15-000028
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150530
FILED AS OF DATE:		20150602
DATE AS OF CHANGE:		20150602

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Blue Bird Corp
		CENTRAL INDEX KEY:			0001589526
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCK & BUS BODIES [3713]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		402 BLUE BIRD BOULEVARD
		CITY:			FORT VALLEY
		STATE:			GA
		ZIP:			31030
		BUSINESS PHONE:		478-822-2130

	MAIL ADDRESS:	
		STREET 1:		402 BLUE BIRD BOULEVARD
		CITY:			FORT VALLEY
		STATE:			GA
		ZIP:			31030

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HENNESSY DANIEL J
		CENTRAL INDEX KEY:			0001519536

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36267
		FILM NUMBER:		15906294

	MAIL ADDRESS:	
		STREET 1:		10 SOUTH WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_143326740748313.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-05-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001589526</issuerCik>
        <issuerName>Blue Bird Corp</issuerName>
        <issuerTradingSymbol>BLBD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001519536</rptOwnerCik>
            <rptOwnerName>HENNESSY DANIEL J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BLUE BIRD CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>402 BLUE BIRD BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>FORT VALLEY</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>31030</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.0001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2015-05-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4878</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4878</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The award represents a grant of restricted stock units (&quot;RSUs&quot;). Each RSU represents a contingent right to receive one share of the common stock, par value $0.0001 (the &quot;Common Stock&quot;), of Blue Bird Corporation (the &quot;Company&quot;).</footnote>
        <footnote id="F2">The RSUs will vest on March 30, 2016; provided, however, that such RSUs will vest in full upon the occurrence of a &quot;change in control&quot; of the Company or if the reporting person's service terminates due to death, disability or due to completion of the reporting person's term of office as a director. Shares of Common Stock will be issued in settlement of the RSUs upon the earlier of the recipient's termination of service as a director or a change in control.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Daniel J. Hennessy</signatureName>
        <signatureDate>2015-05-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
