As of September 29, 2026, Sutro Biopharma's top three insider holders are William J Newell (Ceo, 29.25K shares), Jane Chung (Chief Executive Officer, 21.29K shares), Edward C Albini (Cfo And Secretary, 16.08K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | William J Newell | Ceo | 29,253 | 0 | 29,253 | 19.7% | 07 Mar, 2025 |
| 2 | Jane Chung | Chief Executive Officer | 21,285 | 0 | 21,285 | 14.3% | 06 Mar, 2026 |
| 3 | Edward C Albini | Cfo And Secretary | 16,081 | 0 | 16,081 | 10.8% | 19 May, 2025 |
| 4 | Hans-Peter Gerber | Chief Scientific Officer | 12,367 | 0 | 12,367 | 8.3% | 22 Sep, 2026 |
| 5 | Linda A Fitzpatrick | Chief People Comm. Officer | 11,974 | 0 | 11,974 | 8.1% | 05 May, 2025 |
| 6 | Trevor Hallam | Pres. Rsrch Cf. Sctific Ofcr | 10,037 | 0 | 10,037 | 6.7% | 17 Apr, 2023 |
| 7 | David Pauling | Chief Admin. Ofcr. Gc | 9,748 | 0 | 9,748 | 6.6% | 06 Mar, 2026 |
| 8 | Anne Elizabeth Borgman | Chief Medical Officer | 9,745 | 0 | 9,745 | 6.6% | 05 May, 2025 |
| 9 | Venkatesh Srinivasan | Chief Tech Op Officer | 5,369 | 0 | 5,369 | 3.6% | 05 May, 2025 |
| 10 | Connie Matsui | Director | 5,000 | 0 | 5,000 | 3.4% | 16 Oct, 2025 |
| 11 | Gregory K. Chow | Cfo | 4,725 | 0 | 4,725 | 3.2% | 02 Jun, 2026 |
| 12 | Anik Shabbir | Chief Technical Ops. Officer | 4,083 | 0 | 4,083 | 2.7% | 07 Mar, 2023 |
| 13 | Arturo Md Molina | Chief Medical Officer | 3,774 | 0 | 3,774 | 2.5% | 07 Mar, 2022 |
| 14 | Daniel H Petree | Director | 386 | 1,860 | 2,246 | 1.5% | 29 Jun, 2023 |
| 15 | Barbara Leyman | Chief Business Officer | 1,606 | 0 | 1,606 | 1.1% | 26 Aug, 2025 |
| 16 | Nicki Vasquez | Chief Port. Strat Alnce Ofcr | 1,428 | 0 | 1,428 | 1.0% | 31 Jan, 2024 |
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.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 18 Sep, 2026 | Hans-Peter Gerber | Chief Scientific Officer | Acquired M | 3,750 | $0.00 | $0 | 13,712 | Direct |
| 18 Sep, 2026 | Hans-Peter Gerber | Chief Scientific Officer | Disposed F | 1,345 | $15.34 | $20.63K | 12,367 | Direct |
| 18 Sep, 2026 | Hans-Peter Gerber | Chief Scientific Officer | Disposed M | 3,750 | $0.00 | $0 | 3,750 | Direct |
| 05 Jun, 2026 | Jon Marc Wigginton | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Daniel H Petree | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Sukhi Jagpal | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Heidi Hunter | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Connie Matsui | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Joseph M Lobacki | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | James P Panek | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 05 Jun, 2026 | Michael Dybbs | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 02 Jun, 2026 | Gregory K. Chow | Cfo | Acquired M | 2,500 | $0.00 | $0 | 4,725 | Direct |
| 02 Jun, 2026 | Gregory K. Chow | Cfo | Disposed M | 2,500 | $0.00 | $0 | 7,500 | Direct |
| 04 Mar, 2026 | David Pauling | Chief Admin. Ofcr. Gc | Acquired M | 675 | $0.00 | $0 | 10,025 | Direct |
| 04 Mar, 2026 | Jane Chung | Chief Executive Officer | Acquired M | 788 | $0.00 | $0 | 21,567 | Direct |
| 04 Mar, 2026 | David Pauling | Chief Admin. Ofcr. Gc | Disposed F | 277 | $21.31 | $5.90K | 9,748 | Direct |
| 04 Mar, 2026 | Jane Chung | Chief Executive Officer | Disposed F | 282 | $21.31 | $6.01K | 21,285 | Direct |
| 04 Mar, 2026 | David Pauling | Chief Admin. Ofcr. Gc | Disposed M | 675 | $0.00 | $0 | 0 | Direct |
| 04 Mar, 2026 | Jane Chung | Chief Executive Officer | Disposed M | 788 | $0.00 | $0 | 0 | Direct |
| 01 Mar, 2026 | Hans-Peter Gerber | Chief Scientific Officer | Acquired M | 1,125 | $0.00 | $0 | 8,308 | Direct |