Shattuck Labs, Inc. (STTK) has 20 known insider and institutional holders on record. The largest holder is HILL MICHAEL with 766,332,598 shares. Other notable holders include Gravitz Aaron and Redmile Group, LLC.
Over the last 12 months, insiders have made 32 transactions in STTK stock — 21 buys (valued at $15.75M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
STTK Insider Ownership
Top Holder
HILL MICHAEL
766,332,598 shares
Buys (12 mo)
21
$15.75M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Hill Michael |
10 Percent Owner, Officer: CEO, President |
766,332,598 |
2015-05-04 |
|
| 2 |
Gravitz Aaron |
10 Percent Owner |
556,180,583 |
2015-05-04 |
|
| 3 |
Redmile Group, Llc |
10 Percent Owner |
4,097,730 |
2025-08-26 |
|
| 4 |
Hornblower Josiah |
Director |
2,966,709 |
2021-07-16 |
|
| 5 |
Schreiber Taylor |
Chief Executive Officer |
1,548,300 |
2026-01-13 |
|
| 6 |
Orbimed Advisors Llc |
Director |
1,051,021 |
2025-09-02 |
|
| 7 |
Ashiya Mona |
Director |
1,051,021 |
2025-09-02 |
|
| 8 |
Shukla Abhinav A. |
Chief Technical Officer |
315,500 |
2026-01-13 |
|
| 9 |
Neill Andrew R |
Chief Financial Officer |
228,224 |
2026-01-27 |
|
| 10 |
Pandite Arundathy N. |
Chief Medical Officer |
196,219 |
2026-01-27 |
|
| 11 |
Siegall Clay B |
Director |
128,054 |
2025-08-27 |
|
| 12 |
Stout Stephen |
See Remarks |
81,529 |
2026-01-27 |
|
| 13 |
Deyoung Casi |
Chief Business Officer |
73,480 |
2026-01-27 |
|
| 14 |
Baker Daniel G. |
Director |
66,300 |
2025-09-02 |
|
| 15 |
Thomson Erin Ator |
General Counsel |
48,250 |
2023-01-27 |
|
| 16 |
Green Jeremy |
Director |
40,258 |
2022-06-10 |
|
| 17 |
Sasser Amy Kate |
Director |
33,150 |
2025-07-16 |
|
| 18 |
Gibson Neil W |
Director |
33,150 |
2025-07-16 |
|
| 19 |
Brous Tyler |
Director |
33,150 |
2025-07-16 |
|
| 20 |
Boudreau Helen M |
Director |
33,150 |
2025-07-16 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-01-25 |
Stout Stephen |
See Remarks |
Tax Withholding of RSU |
593 |
$4.15 |
$2.46K |
| 2026-01-25 |
Pandite Arundathy N. |
Chief Medical Officer |
Tax Withholding of RSU |
3,195 |
$4.15 |
$13.26K |
| 2026-01-25 |
Neill Andrew R |
Chief Financial Officer |
Tax Withholding of RSU |
2,589 |
$4.15 |
$10.74K |
| 2026-01-25 |
Deyoung Casi |
Chief Business Officer |
Tax Withholding of RSU |
2,286 |
$4.15 |
$9.49K |
| 2026-01-10 |
Stout Stephen |
See Remarks |
Tax Withholding of RSU |
4,153 |
$4.75 |
$19.73K |
| 2026-01-10 |
Shukla Abhinav A. |
Chief Technical Officer |
RSU Award |
315,500 |
$4.75 |
$1.5M |
| 2026-01-10 |
Pandite Arundathy N. |
Chief Medical Officer |
Tax Withholding of RSU |
6,851 |
$4.75 |
$32.54K |
| 2026-01-10 |
Neill Andrew R |
Chief Financial Officer |
Tax Withholding of RSU |
6,660 |
$4.75 |
$31.64K |
| 2026-01-10 |
Deyoung Casi |
Chief Business Officer |
Tax Withholding of RSU |
5,699 |
$4.75 |
$27.07K |
| 2026-01-10 |
Schreiber Taylor |
Chief Executive Officer |
RSU Award |
1,548,300 |
$4.75 |
$7.35M |
| 2025-08-28 |
Baker Daniel G. |
Director |
RSU Award |
66,300 |
$0.99 |
$65.64K |
| 2025-08-25 |
Baker Daniel G. |
Officer |
Unknown |
- |
- |
- |
| 2025-08-28 |
Ashiya Mona |
Director |
RSU Award |
66,300 |
$0.99 |
$65.64K |
| 2025-08-25 |
Ashiya Mona |
Director |
Informative Buy |
1,051,021 |
$0.87 |
$911.97K |
| 2025-08-25 |
Ashiya Mona |
Officer |
Unknown |
- |
- |
- |
| 2025-08-25 |
Orbimed Advisors Llc |
Director |
Informative Buy |
1,051,021 |
$0.87 |
$911.97K |
| 2025-08-25 |
Orbimed Advisors Llc |
Director |
Unknown |
- |
- |
- |
| 2025-08-25 |
Stout Stephen |
See Remarks |
RSU Award |
12,805 |
$1.08 |
$13.89K |
| 2025-08-25 |
Shukla Abhinav A. |
Chief Technical Officer |
RSU Award |
5,122 |
$1.08 |
$5.56K |
| 2025-08-25 |
Neill Andrew R |
Chief Financial Officer |
RSU Award |
64,027 |
$1.08 |
$69.44K |
| 2025-08-25 |
Schreiber Taylor |
Chief Executive Officer |
RSU Award |
25,610 |
$1.08 |
$27.78K |
| 2025-08-25 |
Siegall Clay B |
Director |
RSU Award |
128,054 |
$1.08 |
$138.89K |
| 2025-08-25 |
Redmile Group, Llc |
10 Percent Owner |
RSU Award |
4,097,730 |
$1.08 |
$4.44M |
| 2025-07-14 |
Sasser Amy Kate |
Director |
RSU Award |
33,150 |
$0.82 |
$27.18K |
| 2025-07-14 |
Brownstein Carrie |
Director |
RSU Award |
33,150 |
$0.82 |
$27.18K |
