-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 K4wCux0C9zgT3JhaSPqs+A==

<SEC-DOCUMENT>0000914260-06-000189.txt : 20061218
<SEC-HEADER>0000914260-06-000189.hdr.sgml : 20061218
<ACCEPTANCE-DATETIME>20061218100110
ACCESSION NUMBER:		0000914260-06-000189
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061213
FILED AS OF DATE:		20061218
DATE AS OF CHANGE:		20061218

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BERKSHIRE HATHAWAY INC
		CENTRAL INDEX KEY:			0001067983
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				470813844
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1440 KIEWIT PLZ
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68131
		BUSINESS PHONE:		4023461400

	MAIL ADDRESS:	
		STREET 1:		1440 KIEWIT PLAZA
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NBH INC
		DATE OF NAME CHANGE:	19980810

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CHACE MALCOLM G
		CENTRAL INDEX KEY:			0001133224
		STATE OF INCORPORATION:			RI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14905
		FILM NUMBER:		061282249

	BUSINESS ADDRESS:	
		STREET 1:		ONE TURKS HEAD PLACE
		CITY:			PROVIDENCE
		STATE:			RI
		ZIP:			02903
		BUSINESS PHONE:		4014565000

	MAIL ADDRESS:	
		STREET 1:		ONE PROVIDENCE WASHINGTON PLZ
		STREET 2:		4TH FL
		CITY:			PROVIDENCE
		STATE:			RI
		ZIP:			02903
</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>2006-12-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001067983</issuerCik>
        <issuerName>BERKSHIRE HATHAWAY INC</issuerName>
        <issuerTradingSymbol>BRK.A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001133224</rptOwnerCik>
            <rptOwnerName>CHACE MALCOLM G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE PROVIDENCE WASHINGTON PLZ</rptOwnerStreet1>
            <rptOwnerStreet2>4TH FL</rptOwnerStreet2>
            <rptOwnerCity>PROVIDENCE</rptOwnerCity>
            <rptOwnerState>RI</rptOwnerState>
            <rptOwnerZipCode>02903</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-12-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>109650</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1053</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person beneficially owns 1,053 shares of the issuer's Class A Common Stock of which (i) 190 shares are held directly by the reporting person, (ii) 123 shares are held by a trust of which the reporting person is beneficiary, (iii) 97 shares are held by a trust of which the reporting person's spouse is trustee and the reporting person is beneficiary, (iv) 54 shares are held by the reporting person's spouse, (v) 280 shares are held by a trust of which a member of the reporting person's immediate family is trustee and the reporting person is beneficiary, (vi) 100 shares are held by a trust of which the reporting person is co-trustee and beneficiary and (vii) 209 shares are held by a limited partnership of which the reporting person is a limited partner.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Margaret D. Farrell (Attorney-in-fact for Malcolm G. Chace)</signatureName>
        <signatureDate>2006-12-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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