Taysha Gene Therapies, Inc. SEC filings TSHA
Taysha Gene Therapies, Inc. has 401 filings in SEC EDGAR's recent list, going back to May 4, 2020. Its latest annual report, Form ARS, was filed on Apr 22, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 11, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 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 11, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2026 | Aug 11, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 10, 2026 |
| 144 | Notice of proposed sale | Jul 10, 2026 | — |
| 8-K |
Current report
Material agreement, Other events
|
Jun 25, 2026 | Jun 24, 2026 |
| 424B5 | Prospectus supplement | Jun 25, 2026 | — |
| 424B5 | Prospectus supplement | Jun 24, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 22, 2026 | Jun 22, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | Jun 1, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 2, 2026 | Jun 1, 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 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| ARS | Annual report to shareholders | Apr 22, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 22, 2026 | — |
| DEF 14A | Proxy statement | Apr 22, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 10, 2026 |
| 144 | Notice of proposed sale | Apr 10, 2026 | — |
| 10-K | Annual report | Mar 19, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 19, 2026 | Mar 19, 2026 |
| 144 | Notice of proposed sale | Feb 27, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| 4 | Insider transaction | Feb 6, 2026 | Feb 4, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 21, 2026 | — |
| 4 | Insider transaction | Jan 14, 2026 | Jan 12, 2026 |
| 4 | Insider transaction | Jan 14, 2026 | Jan 12, 2026 |
| 4 | Insider transaction | Jan 14, 2026 | Jan 12, 2026 |
| 144 | Notice of proposed sale | Jan 12, 2026 | — |
| S-8 | Employee stock plan registration | Jan 6, 2026 | — |
| 4 | Insider transaction | Dec 1, 2025 | Nov 28, 2025 |
| 144 | Notice of proposed sale | Nov 28, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| S-3ASR | Automatic shelf registration | Nov 4, 2025 | — |
| 8-K |
Current report
Material agreement, Results of operations
|
Nov 4, 2025 | Nov 4, 2025 |
| 10-Q | Quarterly report | Nov 4, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Other events
|
Oct 16, 2025 | Oct 16, 2025 |
| 8-K |
Current report
Other events
|
Oct 9, 2025 | Oct 9, 2025 |
| 8-K |
Current report
Other events
|
Oct 2, 2025 | Oct 2, 2025 |
| 144 | Notice of proposed sale | Sep 22, 2025 | — |
| 4 | Insider transaction | Sep 12, 2025 | Sep 10, 2025 |
| 144 | Notice of proposed sale | Sep 10, 2025 | — |
| 4 | Insider transaction | Aug 22, 2025 | Aug 21, 2025 |
| 4 | Insider transaction | Aug 22, 2025 | Aug 21, 2025 |
| 144 | Notice of proposed sale | Aug 21, 2025 | — |
| 144 | Notice of proposed sale | Aug 21, 2025 | — |
| 144 | Notice of proposed sale | Aug 21, 2025 | — |
| 144 | Notice of proposed sale | Aug 21, 2025 | — |
| 144 | Notice of proposed sale | Aug 21, 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 12, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2025 | Aug 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 3, 2025 | — |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jun 3, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Jun 3, 2025 | Jun 2, 2025 |
| 8-K |
Current report
Material agreement, Other events
|
May 29, 2025 | May 28, 2025 |
| 424B5 | Prospectus supplement | May 29, 2025 | — |
| 8-K/A |
Amended current report
Regulation FD disclosure, Other events
|
May 29, 2025 | May 28, 2025 |
| 424B5 | Prospectus supplement | May 28, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
May 28, 2025 | May 28, 2025 |
| 10-Q | Quarterly report | May 15, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 15, 2025 | May 15, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| DEFR14A | Filing | May 9, 2025 | — |
| ARS | Annual report to shareholders | Apr 21, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 21, 2025 | — |
| DEF 14A | Proxy statement | Apr 21, 2025 | Jun 2, 2025 |
| 4/A | Filing | Apr 10, 2025 | May 31, 2023 |
| PRE 14A | Preliminary proxy statement | Apr 10, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Mar 13, 2025 | Mar 11, 2025 |
| 10-K | Annual report | Feb 26, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2025 | Feb 26, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 5, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 5, 2025 | — |
| S-8 | Employee stock plan registration | Jan 7, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| EFFECT | Filing | Dec 20, 2024 | — |
| CORRESP | Letter to the SEC | Dec 20, 2024 | — |
| CORRESP | Letter to the SEC | Dec 19, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 18, 2024 | — |
| S-3 | Shelf registration | Dec 13, 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 | Ownership over 5% (passive) | Nov 14, 2024 | — |
| 10-Q | Quarterly report | Nov 13, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2024 | Nov 13, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 144 | Notice of proposed sale | Jul 5, 2024 | — |
| 144 | Notice of proposed sale | Jul 5, 2024 | — |
| 144 | Notice of proposed sale | Jul 5, 2024 | — |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 8-K |
Current report
Material agreement, Other events
|
Jun 26, 2024 | Jun 26, 2024 |
| 424B5 | Prospectus supplement | Jun 26, 2024 | — |
| 8-K |
Current report
Results of operations, Other events
|
Jun 26, 2024 | Jun 25, 2024 |
| 424B5 | Prospectus supplement | Jun 26, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 18, 2024 | Jun 18, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 30, 2024 | May 29, 2024 |
| 8-K |
Current report
Results of operations
|
May 14, 2024 | May 14, 2024 |
| 10-Q | Quarterly report | May 14, 2024 | Mar 31, 2024 |
| DEFA14A | Additional proxy material | Apr 18, 2024 | — |
| ARS | Annual report to shareholders | Apr 18, 2024 | Dec 31, 2023 |
| DEF 14A | Proxy statement | Apr 18, 2024 | May 29, 2024 |
| S-8 | Employee stock plan registration | Mar 19, 2024 | — |
| 8-K |
Current report
Results of operations
|
Mar 19, 2024 | Mar 19, 2024 |
| 10-K | Annual report | Mar 19, 2024 | Dec 31, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 4 | Insider transaction | Feb 6, 2024 | Feb 2, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 10, 2024 | Jan 10, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 8-K |
Current report
Officer or director change
|
Dec 20, 2023 | Dec 14, 2023 |
| S-8 | Employee stock plan registration | Dec 20, 2023 | — |
| 4 | Insider transaction | Dec 18, 2023 | Dec 14, 2023 |
| 4 | Insider transaction | Dec 18, 2023 | Dec 14, 2023 |
| 4 | Insider transaction | Dec 18, 2023 | Dec 14, 2023 |
| 4 | Insider transaction | Nov 20, 2023 | Nov 17, 2023 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Nov 15, 2023 | Nov 15, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 14, 2023 | Nov 14, 2023 |
| 10-Q | Quarterly report | Nov 14, 2023 | Sep 30, 2023 |
| 4 | Insider transaction | Nov 3, 2023 | Nov 1, 2023 |
| 3 | Initial insider ownership | Nov 3, 2023 | Nov 1, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 1, 2023 | Oct 30, 2023 |
| DEF 14A | Proxy statement | Oct 5, 2023 | Nov 15, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 26, 2023 | Sep 26, 2023 |
| PRE 14A | Preliminary proxy statement | Sep 21, 2023 | Nov 15, 2023 |
| 8-K |
Current report
Other events
|
Sep 19, 2023 | Sep 19, 2023 |
| 424B3 | Prospectus | Sep 11, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 11, 2023 | — |
| EFFECT | Filing | Sep 8, 2023 | — |
| CORRESP | Letter to the SEC | Sep 7, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 6, 2023 | — |
| S-3 | Shelf registration | Aug 30, 2023 | — |
| 8-K |
Current report
Other events
|
Aug 29, 2023 | Aug 28, 2023 |
| SC 13G | Ownership over 5% (passive) | Aug 28, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Aug 25, 2023 | — |
| 4 | Insider transaction | Aug 25, 2023 | Aug 24, 2023 |
| D | Filing | Aug 25, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Aug 25, 2023 | — |
| 144 | Notice of proposed sale | Aug 24, 2023 | — |
| 8-K |
Current report
Other events
|
Aug 24, 2023 | Aug 24, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Aug 21, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 18, 2023 | — |
| 4 | Insider transaction | Aug 16, 2023 | Aug 16, 2023 |
| 4 | Insider transaction | Aug 16, 2023 | Aug 16, 2023 |
| 4 | Insider transaction | Aug 16, 2023 | Aug 16, 2023 |
| 4 | Insider transaction | Aug 16, 2023 | Aug 16, 2023 |
| 10-Q | Quarterly report | Aug 14, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale, Other events
|
Aug 14, 2023 | Aug 14, 2023 |
| 8-K |
Current report
Listing notice
|
Aug 4, 2023 | Aug 3, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 31, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Jul 14, 2023 | Jul 12, 2023 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- TSHA (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Dallas, TX
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1806310
Other Biological Products, (No Diagnostic Substances) companies
- Amgen Inc AMGN
- Gilead Sciences, Inc. GILD
- Moderna, Inc. MRNA
- Argenx SE ARGX
- Revolution Medicines, Inc. RVMD
- Biogen Inc. BIIB
- BioNTech SE BNTX
- Exelixis, Inc. EXEL
All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.