Annexon, Inc. SEC filings ANNX
Annexon, Inc. has 522 filings in SEC EDGAR's recent list, going back to Aug 22, 2011. Its latest annual report, Form ARS, was filed on Apr 27, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 12, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 12, 2026 (results of operations, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| 4 | Insider transaction | Sep 25, 2026 | Sep 24, 2026 |
| 144 | Notice of proposed sale | Aug 13, 2026 | — |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 3 | Initial insider ownership | Aug 12, 2026 | Aug 10, 2026 |
| 10-Q | Quarterly report | Aug 12, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 12, 2026 | Aug 12, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 10, 2026 | Aug 10, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 8-K |
Current report
Other events
|
Aug 6, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Jul 30, 2026 | Jul 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 27, 2026 | — |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 144 | Notice of proposed sale | Jul 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 8, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 8, 2026 | — |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | May 29, 2026 | May 28, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| ARS | Annual report to shareholders | Apr 27, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 27, 2026 | — |
| DEF 14A | Proxy statement | Apr 27, 2026 | Jun 11, 2026 |
| PRE 14A | Preliminary proxy statement | Apr 16, 2026 | Jun 11, 2026 |
| 4 | Insider transaction | Apr 14, 2026 | Apr 10, 2026 |
| S-3ASR | Automatic shelf registration | Mar 31, 2026 | — |
| S-8 | Employee stock plan registration | Mar 31, 2026 | — |
| 10-K | Annual report | Mar 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 30, 2026 | Mar 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 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 | — |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Feb 17, 2026 | Feb 12, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 21, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 14, 2026 | Jan 14, 2026 |
| 8-K |
Current report
Other events
|
Jan 12, 2026 | Jan 12, 2026 |
| 4 | Insider transaction | Jan 2, 2026 | Dec 30, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 20, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Nov 21, 2025 | — |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| 8-K |
Current report
Material agreement, Other events
|
Nov 14, 2025 | Nov 12, 2025 |
| 424B5 | Prospectus supplement | Nov 13, 2025 | — |
| 424B5 | Prospectus supplement | Nov 12, 2025 | — |
| 10-Q | Quarterly report | Nov 10, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2025 | Nov 10, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2025 | — |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 30, 2025 | — |
| 4 | Insider transaction | Oct 2, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 10-Q | Quarterly report | Aug 14, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 14, 2025 | Aug 14, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| 4 | Insider transaction | Aug 1, 2025 | Jul 30, 2025 |
| 4 | Insider transaction | Jul 16, 2025 | Jul 14, 2025 |
| 4 | Insider transaction | Jul 16, 2025 | Jul 14, 2025 |
| 4 | Insider transaction | Jul 16, 2025 | Jul 14, 2025 |
| 144 | Notice of proposed sale | Jul 14, 2025 | — |
| 144 | Notice of proposed sale | Jul 14, 2025 | — |
| 144 | Notice of proposed sale | Jul 14, 2025 | — |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Change to shareholder rights
|
Jun 25, 2025 | Jun 23, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2025 | Jun 5, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 12, 2025 | May 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2025 | — |
| ARS | Annual report to shareholders | Apr 23, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 23, 2025 | — |
| DEF 14A | Proxy statement | Apr 23, 2025 | Jun 5, 2025 |
| S-8 | Employee stock plan registration | Mar 3, 2025 | — |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 10-K | Annual report | Mar 3, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 3, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 144 | Notice of proposed sale | Feb 18, 2025 | — |
| 144 | Notice of proposed sale | Feb 18, 2025 | — |
| 144 | Notice of proposed sale | Feb 18, 2025 | — |
| 144 | Notice of proposed sale | Feb 18, 2025 | — |
| 144 | Notice of proposed sale | Feb 18, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 144 | Notice of proposed sale | Feb 13, 2025 | — |
| 144 | Notice of proposed sale | Feb 13, 2025 | — |
| 144 | Notice of proposed sale | Feb 13, 2025 | — |
| 144 | Notice of proposed sale | Feb 13, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 31, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 13, 2025 | Jan 13, 2025 |
| 4 | Insider transaction | Jan 10, 2025 | Jan 9, 2025 |
| 3 | Initial insider ownership | Jan 10, 2025 | Jan 9, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jan 10, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 8, 2025 | Jan 6, 2025 |
| S-8 | Employee stock plan registration | Dec 19, 2024 | — |
| 8-K |
Current report
Other events
|
Dec 16, 2024 | Dec 16, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 6, 2024 | — |
| 4 | Insider transaction | Dec 4, 2024 | Dec 2, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 10-Q | Quarterly report | Nov 14, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 14, 2024 | Nov 14, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| 4 | Insider transaction | Nov 1, 2024 | Oct 30, 2024 |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 8-K |
Current report
Other events
|
Oct 22, 2024 | Oct 21, 2024 |
| 4 | Insider transaction | Oct 17, 2024 | Oct 15, 2024 |
| 144 | Notice of proposed sale | Oct 15, 2024 | — |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| S-8 | Employee stock plan registration | Sep 27, 2024 | — |
| 4 | Insider transaction | Sep 20, 2024 | Sep 19, 2024 |
| 144 | Notice of proposed sale | Sep 19, 2024 | — |
| 4 | Insider transaction | Sep 16, 2024 | Sep 12, 2024 |
| 144 | Notice of proposed sale | Sep 12, 2024 | — |
| 4 | Insider transaction | Sep 6, 2024 | Sep 5, 2024 |
| 144 | Notice of proposed sale | Sep 5, 2024 | — |
| 4 | Insider transaction | Sep 4, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Aug 30, 2024 | Aug 29, 2024 |
| 144 | Notice of proposed sale | Aug 29, 2024 | — |
| EFFECT | Filing | Aug 15, 2024 | — |
| CORRESP | Letter to the SEC | Aug 13, 2024 | — |
| UPLOAD | Letter from the SEC | Aug 13, 2024 | — |
| S-3 | Shelf registration | Aug 12, 2024 | — |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 8-K |
Current report
Other events
|
Aug 5, 2024 | Aug 5, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 144 | Notice of proposed sale | Jul 15, 2024 | — |
| 144 | Notice of proposed sale | Jul 15, 2024 | — |
| 144 | Notice of proposed sale | Jul 15, 2024 | — |
| 4 | Insider transaction | Jul 2, 2024 | Jul 1, 2024 |
| 8-K |
Current report
Other events
|
Jun 25, 2024 | Jun 25, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- ANNX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Brisbane, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1528115
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.