-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 KXPqS89Mgqzbf4ZXitspvRNNu6LouunWBni2w4eidv+/49tb601W86WC+M1B73Zp
 EUB8V15jUfJtuJXvqOpzsQ==

<SEC-DOCUMENT>0001104659-10-049009.txt : 20100917
<SEC-HEADER>0001104659-10-049009.hdr.sgml : 20100917
<ACCEPTANCE-DATETIME>20100917161128
ACCESSION NUMBER:		0001104659-10-049009
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100915
FILED AS OF DATE:		20100917
DATE AS OF CHANGE:		20100917

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GT Solar International, Inc.
		CENTRAL INDEX KEY:			0001394954
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				030606749
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		243 DANIEL WEBSTER HIGHWAY
		CITY:			MERRIMACK
		STATE:			NH
		ZIP:			03054
		BUSINESS PHONE:		(603)883-5200

	MAIL ADDRESS:	
		STREET 1:		243 DANIEL WEBSTER HIGHWAY
		CITY:			MERRIMACK
		STATE:			NH
		ZIP:			03054

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			OAKTREE CAPITAL MANAGEMENT LP
		CENTRAL INDEX KEY:			0000949509
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34133
		FILM NUMBER:		101078382

	BUSINESS ADDRESS:	
		STREET 1:		333 S GRAND AVENUE 28TH FL
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071
		BUSINESS PHONE:		2138306300

	MAIL ADDRESS:	
		STREET 1:		333 S GRAND AVE 28TH FL
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071

	FORMER NAME:	
		FORMER CONFORMED NAME:	OAKTREE CAPITAL MANAGEMENT LLC
		DATE OF NAME CHANGE:	20010605
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-09-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001394954</issuerCik>
        <issuerName>GT Solar International, Inc.</issuerName>
        <issuerTradingSymbol>SOLR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000949509</rptOwnerCik>
            <rptOwnerName>OAKTREE CAPITAL MANAGEMENT LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OAKTREE CAPITAL MANAGEMENT, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-09-15</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-09-15</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>11000000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.39</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65788149</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By GT Solar Holdings, LLC</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-09-15</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-09-15</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>14000000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.9084</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>51788149</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By GT Solar Holdings, LLC</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F5"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10772</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10772</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F6"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On September 15, 2010, GT Solar Holdings, LLC completed a sale of 11,000,000 shares of the Company's common stock at a public offering price of $7.39 per share.  On September 15, 2010, GT Solar Holdings, LLC completed a concurrent sale of 14,000,000 shares of the Company's common stock to UBS Securities LLC at a price of $6.90841 per share.</footnote>
        <footnote id="F2">These shares are owned directly by GT Solar Holdings, LLC.  OCM/GFI Power Opportunities Fund II, L.P., or the &quot;Main Fund,&quot; and OCM/GFI Power Opportunities Fund II (Cayman), L.P. (&quot;Cayman Fund&quot; and together with the Main Fund, &quot;OCM/GFI Funds&quot;) are together the managing member of GT Solar Holdings, LLC.  Oaktree Capital Management, L.P. (&quot;OCM&quot;) is one of the two investment managers of each of the OCM/GFI Funds.  Voting and investment power with respect to securities owned by the OCM/GFI Funds is exercised by a four-person committee, including two representatives of OCM (any two of Messrs. Stephen A. Kaplan, Michael P. Harmon, Bruce A. Karsh and Howard S. Marks).</footnote>
        <footnote id="F3">Oaktree Holdings, Inc. is the general partner of OCM.  Oaktree Capital Group, LLC is the sole shareholder of Oaktree Holdings, Inc. Oaktree Capital Group Holdings, L.P. controls Oaktree Capital Group, LLC. Oaktree Capital Group Holdings GP, LLC is the general partner of Oaktree Capital Group Holdings, L.P. Oaktree Capital Group Holdings GP, LLC is managed by Howard S. Marks, Bruce A. Karsh, Sheldon M. Stone, Larry W. Keele, Stephen A. Kaplan, John B. Frank, David Kirchheimer and Kevin L. Clayton.</footnote>
        <footnote id="F4">By virtue of the ownership structure described above, each of the OCM/GFI Funds, Oaktree Capital Group Holdings GP, LLC, Oaktree Capital Group Holdings, L.P., Oaktree Capital Group, LLC, Oaktree Holdings, Inc., OCM, Howard S. Marks, Bruce A. Karsh, Sheldon M. Stone, Larry W. Keele, Stephen A. Kaplan, John B. Frank, David Kirchheimer, Kevin L. Clayton and Michael P. Harmon may be deemed to have beneficial ownership of the shares owned by GT Solar Holdings, LLC. Each of the foregoing persons expressly disclaims beneficial ownership of the shares held by GT Solar Holdings, LLC, except to the extent of their respective pecuniary interests therein.</footnote>
        <footnote id="F5">Represents 10,772 restricted stock units. Each restricted stock unit represents the right to receive one share of common stock upon vesting. Vesting of the restricted stock units is subject to the continued service of R. Chad Van Sweden as a director of GT Solar International, Inc. The restricted stock units vest on February 9, 2011. Shares of common stock will be delivered to the reporting person on vesting.</footnote>
        <footnote id="F6">These securities are directly owned by OCM.  By virtue of the ownership structure described above, each of Oaktree Capital Group Holdings GP, LLC, Oaktree Capital Group Holdings, L.P., Oaktree Capital Group, LLC, Oaktree Holdings, Inc., Howard S. Marks, Bruce A. Karsh, Sheldon M. Stone, Larry W. Keele, Stephen A. Kaplan, John B. Frank, David Kirchheimer, Kevin L. Clayton and Michael P. Harmon may be deemed to have beneficial ownership of the shares owned by OCM. Each of the foregoing persons expressly disclaims beneficial ownership of the shares held by OCM, except to the extent of their respective pecuniary interests therein.</footnote>
    </footnotes>

    <remarks>This Form 4 is being filed in two parts due to the large number of reporting persons.  This filing is filed by Oaktree Capital Management, L.P. (&quot;OCM&quot;).  An accompanying filing is filed, on the date hereof, by Oaktree Capital Group Holdings GP, LLC, Oaktree Capital Group Holdings, L.P., Oaktree Capital Group, LLC, Oaktree Holdings, LLC, OCM Holdings I, LLC, Oaktree Capital I, L.P., Oaktree Fund GP I, L.P., OCM Power Opportunities Fund II GP (Cayman) Ltd., OCM Power Opportunities Fund II GP, L.P. and Oaktree Holdings, Inc.  Both filings relate to the same transactions described above. OCM may be deemed a director by deputization as a result of J. Bradford Forth, a managing director of OCM, and Chad Van Sweden, a vice president of OCM, serving on the board of directors of GT Solar International, Inc.</remarks>

    <ownerSignature>
        <signatureName>OAKTREE CAPITAL MANAGEMENT, L.P. By: /s/ Todd Molz Name: Todd Molz Title:  Managing Director, General Counsel By: /s/ Martin Boskovich Name: Martin Boskovich Title:  Vice President, Legal</signatureName>
        <signatureDate>2010-09-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----