December 23, 2025 · Form 4 insider transaction
Wigginton Jon Marc bought 1,500 shares of Sutro Biopharma, Inc. at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 6 days after the transaction.
The option shall vest as to 16.67% of the total award monthly, subject to the reporting person's continued service to the issuer on each vesting date, with the first tranche vesting on January 23, 2026.