<SEC-DOCUMENT>0001209191-16-151302.txt : 20161118
<SEC-HEADER>0001209191-16-151302.hdr.sgml : 20161118
<ACCEPTANCE-DATETIME>20161118180944
ACCESSION NUMBER:		0001209191-16-151302
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20161116
FILED AS OF DATE:		20161118
DATE AS OF CHANGE:		20161118

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEKTAR THERAPEUTICS
		CENTRAL INDEX KEY:			0000906709
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				943134940
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		455 MISSION BAY BOULEVARD SOUTH
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94158
		BUSINESS PHONE:		4154825300

	MAIL ADDRESS:	
		STREET 1:		455 MISSION BAY BOULEVARD SOUTH
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94158

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INHALE THERAPEUTIC SYSTEMS INC
		DATE OF NAME CHANGE:	19980723

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INHALE THERAPEUTIC SYSTEMS
		DATE OF NAME CHANGE:	19940303

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hora Maninder
		CENTRAL INDEX KEY:			0001443159

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24006
		FILM NUMBER:		162008773

	MAIL ADDRESS:	
		STREET 1:		PDL BIOPHARMA, INC.
		STREET 2:		1400 SEAPORT BOULEVARD
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94063
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-11-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000906709</issuerCik>
        <issuerName>NEKTAR THERAPEUTICS</issuerName>
        <issuerTradingSymbol>NKTR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001443159</rptOwnerCik>
            <rptOwnerName>Hora Maninder</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NEKTAR THERAPEUTICS</rptOwnerStreet1>
            <rptOwnerStreet2>455 MISSION BAY BOULEVARD SOUTH</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94158</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP Pharma Dev &amp; Mfg Ops</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-11-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1654</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.96</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50343</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This transaction was executed in multiple trades at prices ranging from $13.71 to $14.14.  The price reported above reflects the weighted average sale price.  The reporting person hereby undertakes to provide full information regarding the number of shares and the prices at which the transactions were effected upon request to the SEC staff, the issuer, or a security holder of the issuer.</footnote>
        <footnote id="F2">This number includes 5,000 shares held by the reporting person in his account under the Issuer's ESPP. The acquisition of these shares under that plan is exempt under Rule 16b-3(c).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Mark A. Wilson, Attorney-in-Fact</signatureName>
        <signatureDate>2016-11-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
