Taysha Gene Therapies, Inc. (TSHA) has 12 known insider and institutional holders on record. The largest holder is Session R.A. II with 8,877,091 shares. Other notable holders include Audentes Therapeutics, Inc. and Nolan Sean P..
Over the last 12 months, insiders have made 20 transactions in TSHA stock — 7 buys (valued at $6.97M) and 9 sells (valued at $2.2M). Insider selling has exceeded buying during this period.
TSHA Insider Ownership
Top Holder
Session R.A. II
8,877,091 shares
Buys (12 mo)
7
$6.97M value
Sells (12 mo)
9
$2.2M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Session R.a. Ii |
10 Percent Owner |
8,877,091 |
2023-07-14 |
|
| 2 |
Audentes Therapeutics, Inc. |
Director |
7,266,342 |
2022-10-31 |
|
| 3 |
Nolan Sean P. |
Chief Executive Officer |
2,949,569 |
2026-01-27 |
|
| 4 |
Manning Paul B |
10 Percent Owner |
2,841,704 |
2025-06-03 |
|
| 5 |
Alam Kamran |
Chief Financial Officer |
1,442,131 |
2026-02-06 |
|
| 6 |
Nagendran Sukumar |
President and Head of R&d |
1,344,307 |
2026-01-27 |
|
| 7 |
Prasad Suyash |
CMO and Head of R&d |
539,545 |
2022-07-07 |
|
| 8 |
Donenberg Phillip B. |
Director |
113,246 |
2025-06-04 |
|
| 9 |
Stalfort John A Iii |
Director |
113,246 |
2025-06-04 |
|
| 10 |
Sepp-lorenzino Laura |
Director |
105,843 |
2025-06-04 |
|
| 11 |
Long Alison S |
Director |
105,843 |
2025-06-04 |
|
| 12 |
Reape Kathleen |
Director |
36,200 |
2023-06-26 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-02-04 |
Alam Kamran |
Chief Financial Officer |
Informative Sell |
1,655 |
$4.52 |
$7.48K |
| 2026-01-26 |
Alam Kamran |
Chief Financial Officer |
Informative Sell |
23,849 |
$4.61 |
$109.94K |
| 2026-01-23 |
Alam Kamran |
Chief Financial Officer |
Informative Sell |
78,968 |
$4.75 |
$375.1K |
| 2026-01-26 |
Nagendran Sukumar |
President and Head of R&d |
Informative Sell |
26,918 |
$4.61 |
$124.09K |
| 2026-01-23 |
Nagendran Sukumar |
President and Head of R&d |
Informative Sell |
89,132 |
$4.75 |
$423.38K |
| 2026-01-26 |
Nolan Sean P. |
Chief Executive Officer |
Informative Sell |
41,312 |
$4.61 |
$190.45K |
| 2026-01-23 |
Nolan Sean P. |
Chief Executive Officer |
Informative Sell |
136,789 |
$4.75 |
$649.75K |
| 2026-01-12 |
Alam Kamran |
Chief Financial Officer |
RSU Award |
231,000 |
$4.86 |
$1.12M |
| 2026-01-12 |
Nagendran Sukumar |
President and Head of R&d |
Option Exercise (Sell) |
111,324 |
$0.70 |
$77.8K |
| 2026-01-12 |
Nolan Sean P. |
Chief Executive Officer |
RSU Award |
648,000 |
$4.86 |
$3.15M |
| 2025-12-01 |
Nagendran Sukumar |
President and Head of R&d |
Option Exercise (Sell) |
260,047 |
$1.71 |
$444.68K |
| 2025-11-28 |
Nagendran Sukumar |
President and Head of R&d |
Option Exercise (Sell) |
70,172 |
$0.70 |
$49.04K |
| 2025-09-10 |
Nagendran Sukumar |
President and Head of R&d |
Option Exercise (Sell) |
41,150 |
$0.70 |
$28.76K |
| 2025-08-21 |
Alam Kamran |
Chief Financial Officer |
Informative Sell |
54,491 |
$2.85 |
$155.3K |
| 2025-08-21 |
Nagendran Sukumar |
President and Head of R&d |
Informative Sell |
57,054 |
$2.85 |
$162.6K |
| 2025-06-02 |
Long Alison S |
Director |
RSU Award |
56,623 |
- |
- |
| 2025-06-02 |
Sepp-lorenzino Laura |
Director |
RSU Award |
56,623 |
- |
- |
| 2025-06-02 |
Stalfort John A Iii |
Director |
RSU Award |
113,246 |
$2.79 |
$315.39K |
| 2025-06-02 |
Donenberg Phillip B. |
Director |
RSU Award |
113,246 |
$2.79 |
$315.39K |
| 2025-05-30 |
Manning Paul B |
10 Percent Owner |
Informative Buy |
750,000 |
$2.75 |
$2.06M |
