Jon Marc Wigginton - Jun 3, 2021 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
Director
Signature
/s/ Edward C. Albini as attorney-in-fact
Stock symbol
STRO
Transactions as of
Jun 3, 2021
Transactions value $
$0
Form type
4
Date filed
6/7/2021, 05:08 PM
Next filing
Feb 1, 2022

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction STRO Stock Option (right to buy) Award $0 +18.5K $0.00 18.5K Jun 3, 2021 Common Stock 18.5K $18.21 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The option vests as to 8.33% of the total shares monthly, commencing July 3, 2021, with 100% of the total shares vested and exercisable on the earlier of the issuer's 2022 annual stockholders meeting or June 3, 2022, subject to the reporting person's provision of service to the issuer on each vesting date.