-----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,
 J+E2YXM82Nv4h9HaIRRKkn467x9sYRELVbpAYu+2VbRWfdMmXqR1Sp4irHPtBPXV
 qhmYw5Hnj/3S0Ob8IA041Q==

<SEC-DOCUMENT>0001264930-03-000010.txt : 20030926
<SEC-HEADER>0001264930-03-000010.hdr.sgml : 20030926
<ACCEPTANCE-DATETIME>20030926165826
ACCESSION NUMBER:		0001264930-03-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030923
FILED AS OF DATE:		20030926

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			1975 TRUST FBO ALTSCHUL ARTHUR G LAND TRUST
		CENTRAL INDEX KEY:			0001264840

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-00041
		FILM NUMBER:		03913041

	BUSINESS ADDRESS:	
		STREET 1:		122 EAST 42ND STREET
		STREET 2:		SUITE 2500
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10168-2500
		BUSINESS PHONE:		2126618710

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:		450 LEXINGTON AVENUE
		STREET 2:		SUITE 3300
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2129168400

	MAIL ADDRESS:	
		STREET 1:		450 LEXINGTON AVENUE
		STREET 2:		SUITE 3300
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-09-23</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001264840</rptOwnerCik>
            <rptOwnerName>1975 TRUST FBO ALTSCHUL ARTHUR G LAND TRUST</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Trustee is a Director of GAM</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>General American Investors 7.2% Tax Adv. Cum. Preferred</value>
            </securityTitle>
            <transactionDate>
                <value>2003-09-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>40000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee is a Director of GAM</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>



    <ownerSignature>
        <signatureName>/S/Arthur G. Altschul Jr., Trustee</signatureName>
        <signatureDate>2003-09-26</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----