Shattuck Labs, Inc. (STTK) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, the three largest insider holders of STTK are Group, Llc Redmile (Director, 5.54Mn shares), Josiah Hornblower (Director, 2.97Mn shares), Taylor Schreiber (Chief Executive Officer, 2.61Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Group, Llc Redmile 0 5,539,724 06 Dec, 2024
Josiah Hornblower 0 2,966,709 16 Jul, 2021
Taylor Schreiber Chief Executive Officer 0 2,610,750 25 May, 2021
Mona Ashiya 0 1,051,021 02 Sep, 2025
Tyler Brous 238,088 0 01 Jul, 2024
Andrew R Neill Chief Financial Officer 228,224 0 27 Jan, 2026
Arundathy N. Pandite Chief Medical Officer 196,219 0 27 Jan, 2026
Josiah Hornblower 188,375 0 25 Jun, 2021
Erin Ator Thomson General Counsel 103,209 0 27 Jan, 2023
Taylor Schreiber Chief Executive Officer 96,612 0 27 Aug, 2025
Stephen Stout See Remarks 81,529 0 27 Jan, 2026
Abhinav A. Shukla Chief Technical Officer 81,258 0 27 Aug, 2025
Casi Deyoung Chief Business Officer 73,480 0 27 Jan, 2026
George Golumbeski 54,613 0 27 Apr, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
25 Jan, 2026 Casi Deyoung Common Stock D 2,286 $4.15 73,480 D F
25 Jan, 2026 Arundathy N. Pandite Common Stock D 3,195 $4.15 196,219 D F
25 Jan, 2026 Stephen Stout Common Stock D 593 $4.15 81,529 D F
25 Jan, 2026 Andrew R Neill Common Stock D 2,589 $4.15 228,224 D F
10 Jan, 2026 Taylor Schreiber Stock Option (Right to Buy) A 1,548,300 $0.00 1,548,300 D A
10 Jan, 2026 Abhinav A. Shukla Common Stock A 315,500 $0.00 315,500 D A
10 Jan, 2026 Casi Deyoung Common Stock D 5,699 $4.75 75,766 D F
10 Jan, 2026 Arundathy N. Pandite Common Stock D 6,851 $4.75 199,414 D F
10 Jan, 2026 Andrew R Neill Common Stock D 6,660 $4.75 230,813 D F
10 Jan, 2026 Stephen Stout Common Stock D 4,153 $4.75 82,122 D F
10 Jan, 2026 Casi Deyoung Common Stock A 381,600 $0.00 381,600 D A
10 Jan, 2026 Andrew R Neill Stock Option (Right to Buy) A 549,800 $0.00 549,800 D A
10 Jan, 2026 Stephen Stout Stock Option (Right to Buy) A 351,400 $0.00 351,400 D A
10 Jan, 2026 Arundathy N. Pandite Common Stock A 487,800 $0.00 487,800 D A
28 Aug, 2025 Mona Ashiya Stock Option (Right to Buy) A 66,300 $0.00 66,300 D A
25 Aug, 2025 Mona Ashiya Common Stock A 5,255,106 $0.87 5,255,106 I P
28 Aug, 2025 Daniel G. Baker Stock Option (Right to Buy) A 66,300 $0.00 66,300 D A
25 Aug, 2025 Mona Ashiya Common Stock A 1,051,021 $0.87 1,051,021 I P
25 Aug, 2025 Mona Ashiya Pre-Funded Warrants (right to buy) A 10,111,384 - 10,111,384 I P
25 Aug, 2025 Mona Ashiya Pre-Funded Warrants (right to buy) A 2,022,277 - 2,022,277 I P