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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 12pt"><B>UNITED
STATES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 12pt"><B>SECURITIES
AND EXCHANGE COMMISSION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C.&nbsp;20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CURRENT REPORT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Pursuant to Section&nbsp;13 or 15(d)
of the Securities Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Date of report&nbsp;(Date of earliest event
reported): September 28, 2012</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 24pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>NEKTAR THERAPEUTICS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Exact Name of Registrant as Specified
in Charter)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
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    <TD STYLE="width: 32%; font-size: 10pt; font-weight: bold; text-align: center">Delaware</TD>
    <TD STYLE="width: 2%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 32%; font-size: 10pt; font-weight: bold; text-align: center">0-24006</TD>
    <TD STYLE="width: 2%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 32%; font-size: 10pt; font-weight: bold; text-align: center">94-3134940</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(State or Other Jurisdiction</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Of Incorporation)</B></P></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Commission</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>File Number)</B></P></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(IRS Employer</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Identification No.)</B></P></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>455 Mission Bay Boulevard South</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>San Francisco, California 94158</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Address of Principal Executive Offices
and Zip Code)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Registrant&rsquo;s telephone number, including
area code: (415) 482-5300</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; font: 10pt Wingdings">&uml;</TD>
    <TD STYLE="width: 96%; font-size: 10pt">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; font: 10pt Wingdings">&uml;</TD>
    <TD STYLE="width: 96%; font-size: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</TD></TR>
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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; font: 10pt Wingdings">&uml;</TD>
    <TD STYLE="width: 96%; font-size: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; font: 10pt Wingdings">&uml;</TD>
    <TD STYLE="width: 96%; font-size: 10pt">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</TD></TR>
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<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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    <TD STYLE="width: 10%; font-size: 10pt; font-weight: bold">Item&nbsp;8.01</TD>
    <TD STYLE="width: 90%; font-size: 10pt; font-weight: bold">Other Events</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">On September 28, 2012, Nektar Therapeutics, a Delaware corporation
(the &ldquo;Company&rdquo;), completed the repayment of all principal and interest due on all of the Company&rsquo;s remaining
outstanding 3.25% convertible subordinated notes due 2012.&nbsp;&nbsp; The Company no longer has any convertible debt outstanding.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in">Pursuant to the requirement of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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    <TD STYLE="width: 12%; vertical-align: top">By:</TD>
    <TD STYLE="width: 2%; vertical-align: bottom; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 86%; vertical-align: top; border-bottom: black 1pt solid">/s/ Gil M. Labrucherie</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: center">Gil M. Labrucherie</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; font-style: italic; text-align: center">General Counsel and Secretary</TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">Date:</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">October 1, 2012</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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{"company-data": {"conformed-name": "NEKTAR THERAPEUTICS", "cik": "0000906709", "assigned-sic": "2834", "irs-number": "943134940", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-24006", "film-number": "121118417"}, "business-address": {"street1": "455 MISSION BAY BOULEVARD SOUTH", "city": "SAN FRANCISCO", "state": "CA", "zip": "94158", "phone": "4154825300"}, "mail-address": {"street1": "455 MISSION BAY BOULEVARD SOUTH", "city": "SAN FRANCISCO", "state": "CA", "zip": "94158"}, "former-company": [{"former-conformed-name": "INHALE THERAPEUTIC SYSTEMS INC", "date-changed": "19980723"}, {"former-conformed-name": "INHALE THERAPEUTIC SYSTEMS", "date-changed": "19940303"}]}
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934
Date of report (Date of earliest event
reported): September 28, 2012
NEKTAR THERAPEUTICS
(Exact Name of Registrant as Specified
in Charter)
Delaware
0-24006
94-3134940
(State or Other Jurisdiction
Of Incorporation)
(Commission
File Number)
(IRS Employer
Identification No.)
455 Mission Bay Boulevard South
San Francisco, California 94158
(Address of Principal Executive Offices
and Zip Code)
Registrant's telephone number, including
area code: (415) 482-5300
Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
¨
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 8.01
Other Events
On September 28, 2012, Nektar Therapeutics, a Delaware corporation
(the "Company"), completed the repayment of all principal and interest due on all of the Company's remaining
outstanding 3.25% convertible subordinated notes due 2012.   The Company no longer has any convertible debt outstanding.
SIGNATURES
Pursuant to the requirement of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
By:
/s/ Gil M. Labrucherie
Gil M. Labrucherie
General Counsel and Secretary
Date:
October 1, 2012