Nektar Therapeutics SEC filings NKTR
Nektar Therapeutics has 1,000 filings in SEC EDGAR's recent list, going back to Aug 5, 2015. Its latest annual report, Form ARS, was filed on Apr 24, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 1, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Oct 20, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 1, 2026 | Oct 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Sep 28, 2026 | — |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 4 | Insider transaction | Sep 25, 2026 | Sep 23, 2026 |
| 8-K |
Current report
Other events
|
Sep 25, 2026 | Sep 24, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 8, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| S-8 | Employee stock plan registration | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| 10-Q | Quarterly report | Aug 14, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2026 | Aug 13, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 29, 2026 | — |
| 4 | Insider transaction | Jul 24, 2026 | Jul 24, 2026 |
| 4 | Insider transaction | Jul 24, 2026 | Jul 24, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jun 30, 2026 |
| 144 | Notice of proposed sale | Jun 30, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 16, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 5, 2026 | Jun 5, 2026 |
| 3 | Initial insider ownership | May 26, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 424B5 | Prospectus supplement | May 8, 2026 | — |
| 8-K |
Current report
Material agreement, Officer or director change
|
May 8, 2026 | May 8, 2026 |
| 10-Q | Quarterly report | May 8, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 6, 2026 | — |
| ARS | Annual report to shareholders | Apr 24, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 24, 2026 | — |
| DEF 14A | Proxy statement | Apr 24, 2026 | Jun 4, 2026 |
| 8-K |
Current report
Material agreement, Other events
|
Apr 23, 2026 | Apr 21, 2026 |
| 424B5 | Prospectus supplement | Apr 23, 2026 | — |
| 424B5 | Prospectus supplement | Apr 20, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 20, 2026 | Apr 20, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Apr 20, 2026 | Apr 20, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 144 | Notice of proposed sale | Mar 13, 2026 | — |
| 10-K | Annual report | Mar 13, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2026 | Mar 12, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Mar 6, 2026 | — |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| 8-K |
Current report
Material agreement, Other events
|
Feb 13, 2026 | Feb 11, 2026 |
| 424B5 | Prospectus supplement | Feb 13, 2026 | — |
| 424B5 | Prospectus supplement | Feb 10, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 10, 2026 | Feb 10, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Feb 10, 2026 | Feb 10, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 30, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 27, 2026 | Jan 27, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 144 | Notice of proposed sale | Jan 20, 2026 | — |
| 4 | Insider transaction | Dec 23, 2025 | Dec 22, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 22, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 16, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Nov 21, 2025 | Nov 21, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 13, 2025 | — |
| S-8 | Employee stock plan registration | Nov 12, 2025 | — |
| 424B5 | Prospectus supplement | Nov 12, 2025 | — |
| S-3ASR | Automatic shelf registration | Nov 12, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Nov 10, 2025 | Nov 8, 2025 |
| 10-Q | Quarterly report | Nov 7, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2025 | Nov 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 31, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 28, 2025 | — |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 18, 2025 | Sep 18, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 144 | Notice of proposed sale | Sep 9, 2025 | — |
| 4 | Insider transaction | Sep 8, 2025 | Sep 4, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 4, 2025 |
| 144 | Notice of proposed sale | Sep 5, 2025 | — |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 144 | Notice of proposed sale | Sep 4, 2025 | — |
| 144 | Notice of proposed sale | Sep 4, 2025 | — |
| 144 | Notice of proposed sale | Sep 2, 2025 | — |
| 144 | Notice of proposed sale | Sep 2, 2025 | — |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| S-8 | Employee stock plan registration | Aug 8, 2025 | — |
| 10-Q | Quarterly report | Aug 8, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2025 | Aug 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 18, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 9, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 3, 2025 | — |
| 8-K |
Current report
Material agreement, Other events
|
Jul 1, 2025 | Jun 30, 2025 |
| 424B5 | Prospectus supplement | Jul 1, 2025 | — |
| 424B5 | Prospectus supplement | Jun 30, 2025 | — |
| 8-K |
Current report
Other events
|
Jun 27, 2025 | Jun 24, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 24, 2025 | Jun 24, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jun 6, 2025 | Jun 6, 2025 |
| 8-K |
Current report
Other events
|
Jun 4, 2025 | Jun 4, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 144 | Notice of proposed sale | May 19, 2025 | — |
| 144 | Notice of proposed sale | May 19, 2025 | — |
| 144 | Notice of proposed sale | May 19, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 10-Q | Quarterly report | May 9, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 8, 2025 | May 8, 2025 |
| ARS | Annual report to shareholders | Apr 25, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Apr 25, 2025 | May 23, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 17, 2025 | — |
| PRE 14A | Preliminary proxy statement | Apr 15, 2025 | May 23, 2025 |
| 8-K |
Current report
Listing notice
|
Apr 4, 2025 | Apr 3, 2025 |
| EFFECT | Filing | Apr 1, 2025 | — |
| 8-K |
Current report
Material agreement
|
Mar 28, 2025 | Mar 28, 2025 |
| CORRESP | Letter to the SEC | Mar 28, 2025 | — |
| S-3 | Shelf registration | Mar 28, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 20, 2025 | — |
| DRSLTR | Filing | Mar 14, 2025 | — |
| DRS | Filing | Mar 14, 2025 | — |
| S-8 | Employee stock plan registration | Mar 14, 2025 | — |
| 10-K | Annual report | Mar 14, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2025 | Mar 12, 2025 |
| 8-K |
Current report
Other events
|
Feb 24, 2025 | Feb 24, 2025 |
| 4 | Insider transaction | Feb 21, 2025 | Feb 19, 2025 |
| 4 | Insider transaction | Feb 21, 2025 | Feb 19, 2025 |
| 4 | Insider transaction | Feb 21, 2025 | Feb 19, 2025 |
| 144 | Notice of proposed sale | Feb 19, 2025 | — |
| 144 | Notice of proposed sale | Feb 19, 2025 | — |
| 144 | Notice of proposed sale | Feb 19, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 8-K |
Current report
Other events
|
Feb 4, 2025 | Feb 4, 2025 |
| 5 | Annual insider ownership | Jan 17, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Jan 17, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Jan 17, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Jan 17, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Jan 17, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Dec 26, 2024 | Dec 23, 2024 |
| 144 | Notice of proposed sale | Dec 26, 2024 | — |
| 144 | Notice of proposed sale | Dec 23, 2024 | — |
| 4 | Insider transaction | Dec 20, 2024 | Dec 19, 2024 |
| 4 | Insider transaction | Dec 19, 2024 | Dec 17, 2024 |
| 144 | Notice of proposed sale | Dec 19, 2024 | — |
| 144 | Notice of proposed sale | Dec 18, 2024 | — |
| 4 | Insider transaction | Dec 17, 2024 | Dec 13, 2024 |
| 4 | Insider transaction | Dec 17, 2024 | Dec 13, 2024 |
| 4 | Insider transaction | Dec 17, 2024 | Dec 13, 2024 |
| 144 | Notice of proposed sale | Dec 17, 2024 | — |
| 8-K |
Current report
Acquisition or sale of assets
|
Dec 2, 2024 | Dec 2, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 19, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 19, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 19, 2024 |
| 144 | Notice of proposed sale | Nov 19, 2024 | — |
| 144 | Notice of proposed sale | Nov 19, 2024 | — |
| 144 | Notice of proposed sale | Nov 19, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| 10-Q | Quarterly report | Nov 8, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Nov 4, 2024 | Nov 1, 2024 |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 4 | Insider transaction | Aug 20, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 19, 2024 |
| 144 | Notice of proposed sale | Aug 19, 2024 | — |
| 144 | Notice of proposed sale | Aug 19, 2024 | — |
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- NKTR (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- San Francisco, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 906709
- Former names
- INHALE THERAPEUTIC SYSTEMS INC (until Jan 10, 2003); INHALE THERAPEUTIC SYSTEMS (until May 14, 1998)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.