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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 e3aWGUmFehfupNXNiw/n8g==

<SEC-DOCUMENT>0001098482-07-000030.txt : 20071120
<SEC-HEADER>0001098482-07-000030.hdr.sgml : 20071120
<ACCEPTANCE-DATETIME>20071120144417
ACCESSION NUMBER:		0001098482-07-000030
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071011
FILED AS OF DATE:		20071120
DATE AS OF CHANGE:		20071120

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WORLD ENERGY SOLUTIONS, INC.
		CENTRAL INDEX KEY:			0001058307
		STANDARD INDUSTRIAL CLASSIFICATION:	POWER, DISTRIBUTION & SPECIALTY TRANSFORMERS [3612]
		IRS NUMBER:				650783722
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3900A 31ST STREET NORTH
		CITY:			ST PETERSBURG
		STATE:			FL
		ZIP:			33714
		BUSINESS PHONE:		7275255552

	MAIL ADDRESS:	
		STREET 1:		3900A 31ST STREET NORTH
		CITY:			ST PETERSBURG
		STATE:			FL
		ZIP:			33714

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADVANCED 3-D ULTRASOUND SERVICES INC
		DATE OF NAME CHANGE:	20050809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	YSEEK INC
		DATE OF NAME CHANGE:	20010413

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SWIFTY CARWASH & QUIK LUBE INC
		DATE OF NAME CHANGE:	19981117

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			UTEK CORP
		CENTRAL INDEX KEY:			0001098482
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25097
		FILM NUMBER:		071259456

	BUSINESS ADDRESS:	
		STREET 1:		2109 PALM AVENUE
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33605
		BUSINESS PHONE:		8137544330

	MAIL ADDRESS:	
		STREET 1:		2109 PALM AVENUE
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33605
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-10-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001058307</issuerCik>
        <issuerName>WORLD ENERGY SOLUTIONS, INC.</issuerName>
        <issuerTradingSymbol>WEGY.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001098482</rptOwnerCik>
            <rptOwnerName>UTEK CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2109 PALM AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TAMPA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33605</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Preferred Series A Convertible</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>40.5</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8437500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.504</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16119672</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the terms of the Series A convertible preferred stock, the 100,000 shares of preferred stock converted into shares of common stock on October 11, 2007, with the number of shares of common stock being determined by dividing $4,250,500.00 by the closing 10 day average of the common stock on such date ($0.504).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>UTEK Corporation by Carole R. Wright, CFO</signatureName>
        <signatureDate>2007-11-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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