<SEC-DOCUMENT>0001179110-15-006860.txt : 20150430
<SEC-HEADER>0001179110-15-006860.hdr.sgml : 20150430
<ACCEPTANCE-DATETIME>20150430160302
ACCESSION NUMBER:		0001179110-15-006860
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150224
FILED AS OF DATE:		20150430
DATE AS OF CHANGE:		20150430

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CASELLA WASTE SYSTEMS INC
		CENTRAL INDEX KEY:			0000911177
		STANDARD INDUSTRIAL CLASSIFICATION:	REFUSE SYSTEMS [4953]
		IRS NUMBER:				030338873
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0430

	BUSINESS ADDRESS:	
		STREET 1:		25 GREENS HILL ROAD
		CITY:			RUTLAND
		STATE:			VT
		ZIP:			05701
		BUSINESS PHONE:		8027750325

	MAIL ADDRESS:	
		STREET 1:		25 GREENS HILL ROAD
		CITY:			RUTLAND
		STATE:			VT
		ZIP:			05701

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CASELLA JOHN W
		CENTRAL INDEX KEY:			0001055352

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23211
		FILM NUMBER:		15818394

	MAIL ADDRESS:	
		STREET 1:		CASELLA WASTE SYSTEMS INC
		STREET 2:		25 GREENS HILL LN
		CITY:			RUTLAND
		STATE:			VT
		ZIP:			05701
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4/A -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2015-02-24</periodOfReport>

    <dateOfOriginalSubmission>2015-02-26</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000911177</issuerCik>
        <issuerName>CASELLA WASTE SYSTEMS INC</issuerName>
        <issuerTradingSymbol>CWST</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001055352</rptOwnerCik>
            <rptOwnerName>CASELLA JOHN W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CASELLA WASTE SYSTEMS</rptOwnerStreet1>
            <rptOwnerStreet2>25 GREENS HILL LANE</rptOwnerStreet2>
            <rptOwnerCity>RUTLAND</rptOwnerCity>
            <rptOwnerState>VT</rptOwnerState>
            <rptOwnerZipCode>05701</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>87600</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>498389</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents the Restricted Stock Unit (RSU) award granted on February 24, 2015, and previously reported on February 26, 2015.  Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock.  RSU's vest in three equal installments beginning on February 24, 2016.</footnote>
        <footnote id="F2">This amendment is being filed solely to correct the number of shares of Class A Common Stock directly beneficially owned. The number of shares of Class A Common Stock directly beneficially owned shown in Table I, column 5 of the Form 4 filed on February 26, 2015 (the &quot;Original Form 4&quot;) inadvertently omitted 95,052 shares of Class A Common Stock. The number of shares of Class A Common Stock directly beneficially owned as shown in Table I, column 5 of this amendment represents the correct number of shares of Class A common stock directly beneficially owned by Mr. Casella following the transaction previously reported in the Original Form 4.</footnote>
        <footnote id="F3">91,940 shares omitted in the Table I, column 5 direct beneficial ownership total of the Original Form 4 were also incorrectly omitted from the direct beneficial ownership total reported, if applicable, in the Form 4s filed by Mr. Casella from December 17, 2009 through July 7, 2014 and the Form 5 filed by Mr. Casella on June 13, 2014 (the &quot;Form 5&quot;). An additional 3,112 shares omitted in the Table I, column 5 direct beneficial ownership total of the Original Form 4 were also incorrectly omitted from the direct beneficial ownership total reported, if applicable, in the Form 4s filed by Mr. Casella from December 17, 2013 through July 7, 2014 and the Form 5.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John W. Casella</signatureName>
        <signatureDate>2015-04-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
