<SEC-DOCUMENT>0001127602-18-015809.txt : 20180501
<SEC-HEADER>0001127602-18-015809.hdr.sgml : 20180501
<ACCEPTANCE-DATETIME>20180501183711
ACCESSION NUMBER:		0001127602-18-015809
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180427
FILED AS OF DATE:		20180501
DATE AS OF CHANGE:		20180501

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hassan Fred
		CENTRAL INDEX KEY:			0001110744

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37702
		FILM NUMBER:		18796966

	MAIL ADDRESS:	
		STREET 1:		C/O WARBURG PINCUS LLC
		STREET 2:		450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	HASSAN FRED
		DATE OF NAME CHANGE:	20000330

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMGEN INC
		CENTRAL INDEX KEY:			0000318154
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				953540776
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE AMGEN CENTER DRIVE
		CITY:			THOUSAND OAKS
		STATE:			CA
		ZIP:			91320
		BUSINESS PHONE:		(805)447-1000

	MAIL ADDRESS:	
		STREET 1:		ONE AMGEN CENTER DRIVE
		CITY:			THOUSAND OAKS
		STATE:			CA
		ZIP:			91320

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMGEN
		DATE OF NAME CHANGE:	19870305
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-04-27</periodOfReport>

    <issuer>
        <issuerCik>0000318154</issuerCik>
        <issuerName>AMGEN INC</issuerName>
        <issuerTradingSymbol>AMGN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001110744</rptOwnerCik>
            <rptOwnerName>Hassan Fred</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE AMGEN CENTER DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THOUSAND OAKS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91320-1799</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-04-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1127</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7218</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Fred Hassan</signatureName>
        <signatureDate>2018-04-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
