-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 EEEUjMTd7PwyEL27lyutM8Ap6xa02tyki10p5eQy38BA+n37FMj37valcsH0YwgD
 MCY0naAwX2IN0cSX9CsILA==

<SEC-DOCUMENT>0001264928-10-000002.txt : 20100204
<SEC-HEADER>0001264928-10-000002.hdr.sgml : 20100204
<ACCEPTANCE-DATETIME>20100204155009
ACCESSION NUMBER:		0001264928-10-000002
CONFORMED SUBMISSION TYPE:	5/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091231
FILED AS OF DATE:		20100204
DATE AS OF CHANGE:		20100204

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GENERAL AMERICAN INVESTORS CO INC
		CENTRAL INDEX KEY:			0000040417
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				135098450
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 PARK AVENUE
		STREET 2:		35TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2129168400

	MAIL ADDRESS:	
		STREET 1:		100 PARK AVENUE
		STREET 2:		35TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRUST FBO ALTSCHUL ARTHUR G JR UW ALTSCHUL FRANK
		CENTRAL INDEX KEY:			0001264928

	FILING VALUES:
		FORM TYPE:		5/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-00041
		FILM NUMBER:		10574082

	BUSINESS ADDRESS:	
		STREET 1:		C/O OVERBROOK MANAGEMENT CORP
		STREET 2:		122 EAST 42ND STREET SUITE 2500
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10168
		BUSINESS PHONE:		(212) 661-8710

	MAIL ADDRESS:	
		STREET 1:		C/O OVERBROOK MANAGEMENT CORP
		STREET 2:		122 EAST 42ND STREET SUITE 2500
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10168
</SEC-HEADER>
<DOCUMENT>
<TYPE>5/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5/A</documentType>

    <periodOfReport>2009-12-31</periodOfReport>

    <dateOfOriginalSubmission>2010-01-29</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000040417</issuerCik>
        <issuerName>GENERAL AMERICAN INVESTORS CO INC</issuerName>
        <issuerTradingSymbol>GAM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001264928</rptOwnerCik>
            <rptOwnerName>TRUST FBO ALTSCHUL ARTHUR G JR UW ALTSCHUL FRANK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OVERBROOK MANAGEMENT CORP</rptOwnerStreet1>
            <rptOwnerStreet2>122 EAST 42ND STREET SUITE 2500</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10168</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>TTEE/Beneficiary/GAM Director</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-12-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>78</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.86</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5214</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>5.95% Preferred Stock</value>
            </securityTitle>
            <transactionCoding>
                <transactionFormType></transactionFormType>
            </transactionCoding>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares received as payment of dividends</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Arthur G. Altschul, Jr. as Trustee</signatureName>
        <signatureDate>2010-02-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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