Shattuck Labs STTK Insider Ownership

NASDAQ STTK
$6.80 -0.16 (-2.30%)
As of: Sep 4, 2026 · 11:47 AM EDT

Insider Holdings by Owner

14.79Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
16.91%
0% pp QoQ
Shares Held by Insiders
12.21Mn
filed for Sep 2026
0.00% QoQ
Shares Outstanding
72.18Mn
72,184,818 shares
Direct Holdings
0
Indirect: 12.21Mn
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
13
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

As of August 29, 2026, Shattuck Labs's top three insider holders are Mona Ashiya (Director, 1.05Mn shares), Advisors Llc Orbimed (Director, 1.05Mn shares), Clay B Siegall (Director, 318.61K shares).

Form 4 Holdings

Insiders Holding STTK

Insiders 13
Shares held 14.79Mn
Of outstanding 20.49%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Group, Llc Redmile Director, TenPercentOwner 0 11,155,213 11,155,213 75.4% 06 Dec, 2024
2 Advisors Llc Orbimed Director 0 1,051,021 1,051,021 7.1% 02 Sep, 2025
3 Mona Ashiya Director 0 1,051,021 1,051,021 7.1% 02 Sep, 2025
4 Clay B Siegall Director 318,608 0 318,608 2.2% 11 Jun, 2026
5 Andrew R Neill Chief Financial Officer 292,251 0 292,251 2.0% 14 May, 2026
6 Tyler Brous Director 238,088 0 238,088 1.6% 01 Jul, 2024
7 Arundathy N. Pandite Chief Medical Officer 136,219 0 136,219 0.9% 02 Jul, 2026
8 Taylor Schreiber Chief Executive Officer 122,222 0 122,222 0.8% 13 May, 2026
9 Erin Ator Thomson General Counsel 103,209 0 103,209 0.7% 27 Jan, 2023
10 Abhinav A. Shukla Chief Technical Officer 98,533 0 98,533 0.7% 07 Jul, 2026
11 Stephen Stout Officer 93,366 0 93,366 0.6% 18 May, 2026
12 Casi Deyoung Chief Business Officer 73,480 0 73,480 0.5% 27 Jan, 2026
13 George Golumbeski Director 54,613 0 54,613 0.4% 27 Apr, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

411 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
02 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Acquired M 410 $3.57 $1.46K 86,790 Direct
02 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Disposed S 410 $7.01 $2.87K 86,380 Direct
06 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Acquired M 12,153 $3.57 $43.39K 98,533 Direct
02 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Disposed M 410 $0.00 $0 26,293 Direct
06 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Disposed M 12,153 $0.00 $0 14,140 Direct
30 Jun, 2026 Abhinav A. Shukla Chief Technical Officer Acquired M 23,365 $3.57 $83.41K 109,745 Direct
30 Jun, 2026 Arundathy N. Pandite Chief Medical Officer Disposed S 30,000 $7.01 $210.30K 136,219 Direct
30 Jun, 2026 Abhinav A. Shukla Chief Technical Officer Disposed S 23,365 $7.08 $165.42K 86,380 Direct
01 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Acquired M 100 $3.57 $357 86,480 Direct
01 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Disposed S 100 $7.07 $707 86,380 Direct
30 Jun, 2026 Abhinav A. Shukla Chief Technical Officer Disposed M 23,365 $0.00 $0 26,803 Direct
01 Jul, 2026 Abhinav A. Shukla Chief Technical Officer Disposed M 100 $0.00 $0 26,703 Direct
11 Jun, 2026 Mona Ashiya Director Acquired P 1,041,667 26,519,541 Indirect
11 Jun, 2026 Mona Ashiya Director Acquired P 208,333 5,303,908 Indirect
09 Jun, 2026 Clay B Siegall Director Acquired P 62,500 $4.00 $250.00K 318,608 Direct
08 Jun, 2026 Mona Ashiya Director Acquired C 15,366,490 25,477,874 Indirect
08 Jun, 2026 Mona Ashiya Director Acquired C 3,073,298 5,095,575 Indirect
08 Jun, 2026 Mona Ashiya Director Disposed C 15,366,490 0 Indirect
08 Jun, 2026 Mona Ashiya Director Disposed C 3,073,298 0 Indirect
29 May, 2026 George Golumbeski Director Acquired A 81,000 $0.00 $0 81,000 Direct