Sutro Biopharma, Inc. (STRO) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, the three largest insider holders of STRO are William J Newell (Ceo, 29.25K shares), Jane Chung (Chief Executive Officer, 21.29K shares), William J Newell (Ceo, 11.65K 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
William J Newell Ceo 29,253 0 07 Mar, 2025
William J Newell Ceo 0 11,653 15 Mar, 2022
Trevor Hallam Pres. Rsrch Cf. Sctific Ofcr 10,037 0 17 Apr, 2023
Anne Elizabeth Borgman Chief Medical Officer 9,745 0 05 May, 2025
Venkatesh Srinivasan Chief Tech Op Officer 5,369 0 05 May, 2025
Anik Shabbir Chief Technical Ops. Officer 4,083 0 07 Mar, 2023
Arturo Md Molina Chief Medical Officer 3,774 0 07 Mar, 2022
Daniel H Petree 386 1,860 29 Jun, 2023
Jane Chung Chief Executive Officer 21,285 0 06 Mar, 2026
Gregory K. Chow Cfo 1,975 0 16 Oct, 2025
Barbara Leyman Chief Business Officer 1,606 0 26 Aug, 2025
Nicki Vasquez Chief Port. Strat Alnce Ofcr 1,428 0 31 Jan, 2024
David Pauling Chief Admin. Ofcr. Gc 9,748 0 06 Mar, 2026
Hans-Peter Gerber Chief Scientific Officer 9,518 0 03 Mar, 2026

* 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
04 Mar, 2026 David Pauling Common Stock A 675 $0.00 10,025 D M
04 Mar, 2026 Jane Chung Common Stock A 788 $0.00 21,567 D M
04 Mar, 2026 David Pauling Common Stock D 277 $21.31 9,748 D F
04 Mar, 2026 Jane Chung Common Stock D 282 $21.31 21,285 D F
04 Mar, 2026 David Pauling Restricted Stock Units (RSUs) D 675 $0.00 0 D M
04 Mar, 2026 Jane Chung Restricted Stock Units (RSUs) D 788 $0.00 0 D M
01 Mar, 2026 David Pauling Common Stock A 500 $0.00 7,673 D M
02 Mar, 2026 Gregory K. Chow Stock Option (right to buy) A 40,000 $0.00 40,000 D A
01 Mar, 2026 Hans-Peter Gerber Common Stock A 1,125 $0.00 8,308 D M
01 Mar, 2026 Jane Chung Common Stock A 688 $0.00 14,579 D M
02 Mar, 2026 Gregory K. Chow Restricted Stock Units (RSUs) A 5,000 $0.00 5,000 D A
01 Mar, 2026 Jane Chung Common Stock A 2,500 $0.00 17,079 D M
01 Mar, 2026 Hans-Peter Gerber Common Stock D 463 $20.47 7,845 D F
01 Mar, 2026 David Pauling Common Stock A 842 $0.00 8,515 D M
01 Mar, 2026 David Pauling Common Stock D 551 $20.47 7,964 D F
01 Mar, 2026 Jane Chung Common Stock D 1,271 $20.47 15,808 D F
02 Mar, 2026 Hans-Peter Gerber Common Stock A 2,843 $0.00 10,688 D M
02 Mar, 2026 Jane Chung Common Stock A 7,750 $0.00 23,558 D M
02 Mar, 2026 Hans-Peter Gerber Common Stock D 1,170 $20.55 9,518 D F
02 Mar, 2026 David Pauling Common Stock A 2,356 $0.00 10,320 D M