Lexeo Therapeutics, Inc. SEC filings LXEO
Lexeo Therapeutics, Inc. has 361 filings in SEC EDGAR's recent list, going back to Feb 4, 2022. Its latest annual report, Form ARS, was filed on Apr 30, 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 Sep 29, 2026 (acquisition or sale of assets, unregistered share sale). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Nov 4, 2026 | — |
| S-3 | Shelf registration | Oct 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 13, 2026 | — |
| 8-K |
Current report
Acquisition or sale of assets, Unregistered share sale
|
Sep 29, 2026 | Sep 29, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 24, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 24, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 24, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 24, 2026 |
| 8-K |
Current report
Material agreement, Other events
|
Sep 22, 2026 | Sep 16, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 18, 2026 |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 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 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 4 | Insider transaction | Jul 1, 2026 | Jun 29, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 29, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 29, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 29, 2026 |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 25, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 15, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 10-Q | Quarterly report | May 11, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
May 11, 2026 | May 11, 2026 |
| 4 | Insider transaction | Apr 30, 2026 | Apr 28, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 28, 2026 |
| ARS | Annual report to shareholders | Apr 30, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 30, 2026 | — |
| DEF 14A | Proxy statement | Apr 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 30, 2026 | Apr 28, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 13, 2026 | — |
| 4 | Insider transaction | Apr 7, 2026 | Apr 6, 2026 |
| 144 | Notice of proposed sale | Apr 6, 2026 | — |
| S-8 | Employee stock plan registration | Mar 30, 2026 | — |
| 10-K | Annual report | Mar 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 30, 2026 | Mar 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4/A | Filing | Feb 20, 2026 | Nov 18, 2025 |
| 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 | — |
| 4 | Insider transaction | Feb 17, 2026 | Feb 13, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| 4 | Insider transaction | Feb 6, 2026 | Feb 4, 2026 |
| 4 | Insider transaction | Feb 6, 2026 | Feb 4, 2026 |
| 4 | Insider transaction | Feb 6, 2026 | Feb 4, 2026 |
| 3 | Initial insider ownership | Feb 5, 2026 | Jan 20, 2026 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2026 | Jan 30, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 30, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 29, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Jan 27, 2026 | Jan 27, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 21, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jan 12, 2026 | Jan 12, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 8, 2025 | — |
| EFFECT | Filing | Nov 26, 2025 | — |
| 424B3 | Prospectus | Nov 26, 2025 | — |
| CORRESP | Letter to the SEC | Nov 25, 2025 | — |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 20, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 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/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 7, 2025 | — |
| S-3 | Shelf registration | Nov 5, 2025 | — |
| S-8 | Employee stock plan registration | Nov 5, 2025 | — |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 27, 2025 | — |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale, Other events
|
Oct 17, 2025 | Oct 16, 2025 |
| 424B5 | Prospectus supplement | Oct 17, 2025 | — |
| 144 | Notice of proposed sale | Oct 17, 2025 | — |
| 144 | Notice of proposed sale | Oct 17, 2025 | — |
| 144 | Notice of proposed sale | Oct 17, 2025 | — |
| 144 | Notice of proposed sale | Oct 17, 2025 | — |
| 144 | Notice of proposed sale | Oct 17, 2025 | — |
| FWP | Free writing prospectus | Oct 17, 2025 | — |
| 424B5 | Prospectus supplement | Oct 16, 2025 | — |
| FWP | Free writing prospectus | Oct 16, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Oct 7, 2025 | Oct 7, 2025 |
| 4 | Insider transaction | Sep 16, 2025 | Sep 12, 2025 |
| 4/A | Filing | Sep 10, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 3 | Initial insider ownership | Aug 27, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 10-Q | Quarterly report | Aug 14, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Aug 14, 2025 | Aug 14, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 7, 2025 | — |
| 424B3 | Prospectus | Jul 1, 2025 | — |
| EFFECT | Filing | Jun 30, 2025 | — |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 26, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 30, 2025 | Jun 30, 2025 |
| CORRESP | Letter to the SEC | Jun 27, 2025 | — |
| CORRESP | Letter to the SEC | Jun 26, 2025 | — |
| S-3/A | Filing | Jun 26, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 18, 2025 | — |
| S-3 | Shelf registration | Jun 13, 2025 | — |
| DEFA14A | Additional proxy material | Jun 5, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 4, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 4, 2025 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
May 27, 2025 | May 27, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 10-Q/A | Amended quarterly report | May 15, 2025 | Mar 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 12, 2025 | — |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 12, 2025 | May 12, 2025 |
| ARS | Annual report to shareholders | Apr 28, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 28, 2025 | — |
| DEF 14A | Proxy statement | Apr 28, 2025 | Dec 31, 2024 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2025 | — |
| 4 | Insider transaction | Apr 9, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Apr 9, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Apr 9, 2025 | Mar 14, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Apr 7, 2025 | Apr 7, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 14, 2025 |
| S-8 POS | Filing | Mar 24, 2025 | — |
| 424B5 | Prospectus supplement | Mar 24, 2025 | — |
| S-8 | Employee stock plan registration | Mar 24, 2025 | — |
| 10-K | Annual report | Mar 24, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 24, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Feb 21, 2025 | Feb 19, 2025 |
| 4 | Insider transaction | Feb 21, 2025 | Feb 19, 2025 |
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- LXEO (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- New York, NY
- SEC filer status
- , Emerging growth company
- SEC CIK
- 1907108
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.