🕵️ Taysha GENE Therapies, Inc. ($TSHA)
SEC insider & ownership activity, last 12 months · CIK 1806310 · every row links its SEC filing
Over the last 12 months insiders sold $6.7M with no open-market buying against it. Nagendran Sukumar sold $5.3M (Nov–Jul). BlackRock, Inc. added 5.2% → 6.5%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 3 sellers, $6.7M (12 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Nagendran Sukumar | 0 | – | 7 | $5.3M | Jul 10, 2026 |
| Sean P. Nolan | 0 | – | 2 | $840K | Jan 26, 2026 |
| Kamran Alam | 0 | – | 3 | $493K | Feb 4, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Roderick WONG, M.D. | 10.0% | 13G | May 15, 2025 | filing ↗ | |
| RA Capital Management, L.P. | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Peter Kolchinsky | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Rajeev Shah | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Paul B. Manning | 9.8% | 13D | May 30, 2025 | filing ↗ | |
| RTW Investments, LP | 7.0% | 13G | May 15, 2026 | filing ↗ | |
| Roderick Wong | 7.0% | 13G | May 15, 2026 | filing ↗ | |
| BlackRock, Inc. | 6.5% | 13G | Jan 21, 2026 | filing ↗ | |
| Vestal Point Capital, LP | 6.3% | 13G | May 15, 2026 | filing ↗ | |
| Ryan Wilder | 6.3% | 13G | May 15, 2026 | filing ↗ | |
| The PAUL B. Manning Revocable Trust Dated MAY 10, 2000 | 5.6% | 13D | May 30, 2025 | filing ↗ | |
| Morgan Stanley | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| The Goldman Sachs Group, Inc. | 5.1% | 13G | Jul 3, 2025 | filing ↗ | |
| Goldman Sachs & Co. LLC | 5.1% | 13G | Jul 3, 2025 | filing ↗ | |
| Morgan Stanley Capital Services LLC | 5.0% | 13G | Aug 13, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Nagendran Sukumar | $1.3M | Jul 10, 2026 | filing ↗ |
| Nagendran Sukumar | $926K | Apr 10, 2026 | filing ↗ |
| Rumana Haque-Ahmed | $11K | Feb 27, 2026 | filing ↗ |
| Rumana Haque-Ahmed | $3K | Feb 4, 2026 | filing ↗ |
| Sean McAuliffe | $4K | Feb 4, 2026 | filing ↗ |
| Fred Porter | $4K | Feb 4, 2026 | filing ↗ |
| Emily McGinnis | $4K | Feb 4, 2026 | filing ↗ |
| Kamran Alam | $8K | Feb 4, 2026 | filing ↗ |
| Rumana Haque-Ahmed | $153K | Jan 23, 2026 | filing ↗ |
| Sean McAuliffe | $234K | Jan 23, 2026 | filing ↗ |
| Fred Porter | $280K | Jan 23, 2026 | filing ↗ |
| Emily McGinnis | $163K | Jan 23, 2026 | filing ↗ |
| Kamran Alam | $513K | Jan 23, 2026 | filing ↗ |
| Sukumar Nagendran | $579K | Jan 23, 2026 | filing ↗ |
| Sean P. Nolan | $856K | Jan 23, 2026 | filing ↗ |
| Nagendran Sukumar | $996K | Jan 12, 2026 | filing ↗ |
| Nagendran Sukumar | $1.8M | Nov 28, 2025 | filing ↗ |
| Rumana Haque-Ahmed | $30K | Sep 22, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 24, 2026 | filing ↗ |
| Other events (8.01) | Jun 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 24, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 22, 2026 | filing ↗ |
| Other events (8.01) | Jun 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 22, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 1, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Earnings (2.02) | Mar 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 19, 2026 | filing ↗ |
| Material agreement (1.01) | Nov 4, 2025 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Other events (8.01) | Oct 16, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 16, 2025 | filing ↗ |
| Other events (8.01) | Oct 9, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 9, 2025 | filing ↗ |
| Other events (8.01) | Oct 2, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 2, 2025 | filing ↗ |