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NEKTAR THERAPEUTICS

For the period ended Jun 4, 2026. Filed Apr 24, 2026.

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What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

Jun 4, 2026 · Filed Apr 24, 2026

NKTR$37.26+3.1%Stored close · as of Nov 6, 2026
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Contents

ADDITIONAL INFORMATION

Our website address ishttp://www.nektar.com. The information in, or that can be accessed through, our website is not deemed to be incorporated by reference into this proxy statement. Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and amendments to those reports are available, free of charge, on or through our website as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. The SEC maintains an internet site that contains reports, proxy and information statements and other information regarding our filings atwww.sec.gov. In addition, a copy of our Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the SEC is available without charge upon written request to: Secretary, Nektar Therapeutics, 455 Mission Bay Boulevard South, San Francisco, California 94158.

By Order of the Board of Directors

/s/ Elizabeth Zhang

Elizabeth Zhang

Vice President, Legal and Secretary

April 24, 2026

Exhibit A

AMENDMENT TO

AMENDED AND RESTATED

2017 PERFORMANCE INCENTIVE PLAN

In accordance with the provisions of the Nektar Therapeutics Amended and Restated 2017 Performance Incentive Plan (as amended from time to time, the “Plan”), the Plan is hereby amended as follows:

1.Section 4.2(1) of the Plan is hereby deleted in its entirety and replaced with the following:

“7,346,666 shares of Common Stock, less”

2.Section 4.2(a) of the Plan is hereby deleted in its entirety and replaced with the following

“The maximum number of shares of Common Stock that may be delivered pursuant to options qualified as incentive stock options granted under this Plan is 7,346,666 shares.

3.Except as modified herein, the Plan is not modified in any respect and remains in full force and effect.

Approved by the Board of Directors: March 19, 2026

Approved by the Stockholders: June , 2026

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.