William J. Newell
CEO at Sutro Biopharma Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Sutro Biopharma Inc., 3 years.
Sutro Biopharma Inc.
Director · CEO
Chief executive roles
Sutro Biopharma Inc.
· CEO
Dates unknown
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 5, 2025 | Sutro Biopharma Inc. | Option exercise | +18,750 | — | — |
| Mar 5, 2025 | Sutro Biopharma Inc. | Shares withheld for tax | −6,708 | $1.36 | $9,123 |
| Mar 4, 2025 | Sutro Biopharma Inc. | Option exercise | +31,125 | — | — |
| Mar 4, 2025 | Sutro Biopharma Inc. | Shares withheld for tax | −11,136 | $1.42 | $15,813 |
| Mar 1, 2025 | Sutro Biopharma Inc. | Option exercise | +23,750 | — | — |
| Mar 1, 2025 | Sutro Biopharma Inc. | Option exercise | +41,750 | — | — |
| Mar 1, 2025 | Sutro Biopharma Inc. | Shares withheld for tax | −25,203 | $1.59 | $40,073 |
| Mar 5, 2024 | Sutro Biopharma Inc. | Option exercise | +18,750 | — | — |
| Mar 5, 2024 | Sutro Biopharma Inc. | Shares withheld for tax | −6,690 | $4.54 | $30,373 |
| Mar 4, 2024 | Sutro Biopharma Inc. | Option exercise | +31,125 | — | — |
| Mar 4, 2024 | Sutro Biopharma Inc. | Shares withheld for tax | −11,105 | $4.79 | $53,193 |
| Mar 1, 2024 | Sutro Biopharma Inc. | Option exercise | +23,750 | — | — |
| Mar 1, 2024 | Sutro Biopharma Inc. | Shares withheld for tax | −8,559 | $4.95 | $42,367 |
| Jan 29, 2024 | Sutro Biopharma Inc. | Option exercise | +13,750 | — | — |
| Jan 29, 2024 | Sutro Biopharma Inc. | Shares withheld for tax | −5,634 | $4.99 | $28,114 |
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