-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 L0DtFhhKhzljMWDvKscxy+qygOwtUKDjAsDqDDjtQawMtwwuNwQ/Hc2Glwuea6TG
 HbuaqUQ0AUzCDK/wrRMusA==

<SEC-DOCUMENT>0001179110-07-019128.txt : 20071002
<SEC-HEADER>0001179110-07-019128.hdr.sgml : 20071002
<ACCEPTANCE-DATETIME>20071002143329
ACCESSION NUMBER:		0001179110-07-019128
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070810
FILED AS OF DATE:		20071002
DATE AS OF CHANGE:		20071002

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			METABOLIX, INC.
		CENTRAL INDEX KEY:			0001121702
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS PLASTIC PRODUCTS [3080]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	BUSINESS ADDRESS:	
		STREET 1:		21 ERIE ST.
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-492-0505

	MAIL ADDRESS:	
		STREET 1:		21 ERIE ST.
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	METABOLIX INC
		DATE OF NAME CHANGE:	20000810

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Auchincloss Thomas G
		CENTRAL INDEX KEY:			0001377820

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33133
		FILM NUMBER:		071149164

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(617)492-0505

	MAIL ADDRESS:	
		STREET 1:		C/O METABOLIX, INC.
		STREET 2:		21 ERIE STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-08-10</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001121702</issuerCik>
        <issuerName>METABOLIX, INC.</issuerName>
        <issuerTradingSymbol>MBLX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001377820</rptOwnerCik>
            <rptOwnerName>Auchincloss Thomas G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O METABOLIX, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>21 ERIE STREET</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02139</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Former Officer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Sarah P. Cecil, attorney-in-fact</signatureName>
        <signatureDate>2007-10-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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