-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BAyins8d7Ap7uNR7ij825kxXjekptF9PLT08+SFyLm9BdKo1JFiNmNFv6PLNGoLN
 j61Kx5g9Te9ZuqwUL3ZH8A==

<SEC-DOCUMENT>0001179110-07-007858.txt : 20070416
<SEC-HEADER>0001179110-07-007858.hdr.sgml : 20070416
<ACCEPTANCE-DATETIME>20070416121819
ACCESSION NUMBER:		0001179110-07-007858
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070410
FILED AS OF DATE:		20070416
DATE AS OF CHANGE:		20070416

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Foster Matthew
		CENTRAL INDEX KEY:			0001368034

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32919
		FILM NUMBER:		07767590

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		3034201141

	MAIL ADDRESS:	
		STREET 1:		C/O ASCENT SOLAR TECHNOLOGIES, INC.
		STREET 2:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ascent Solar Technologies, Inc.
		CENTRAL INDEX KEY:			0001350102
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				203672603
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127
		BUSINESS PHONE:		303 420 1141

	MAIL ADDRESS:	
		STREET 1:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127
</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>2007-04-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001350102</issuerCik>
        <issuerName>Ascent Solar Technologies, Inc.</issuerName>
        <issuerTradingSymbol>ASTI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001368034</rptOwnerCik>
            <rptOwnerName>Foster Matthew</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ASCENT SOLAR TECHNOLOGIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>8120 SHAFFER PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>LITTLETON</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80127</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-04-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.74</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>105000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Following the reported transaction, Mr. Foster's spouse holds 15 shares of common stock, 215 Class A warrants and 430 Class B warrants.</footnote>
        <footnote id="F2">In addition to 105,000 shares of common stock, Mr. Foster also holds options to purchase 20,000 shares of common stock that expire on November 18, 2015 and options to purchase 100,000 shares of common stock that expire on February 27, 2016.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>David C. Wang, as attorney-in-fact for Matthew B. Foster</signatureName>
        <signatureDate>2007-04-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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