Brunilda Shtylla - Mar 3, 2023 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
Chief Business Officer
Signature
/s/ Edward C. Albini as attorney-in-fact for Brunilda Shtylla
Stock symbol
STRO
Transactions as of
Mar 3, 2023
Transactions value $
-$26,263
Form type
4
Date filed
3/7/2023, 04:02 PM
Previous filing
Mar 7, 2023
Next filing
Aug 28, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STRO Common Stock Options Exercise +6.75K +37.6% 24.7K Mar 3, 2023 Direct F1
transaction STRO Common Stock Options Exercise +4.38K +17.71% 29.1K Mar 3, 2023 Direct F1
transaction STRO Common Stock Tax liability -$26.3K -4.54K -15.08% $5.79 25.5K Mar 3, 2023 Direct F2

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 Common Stock) Award $0 +40K $0.00 40K Mar 3, 2023 Common Stock 40K $5.79 Direct F3
transaction STRO Restricted Stock Unit (RSU) Award $0 +27.5K $0.00 27.5K Mar 3, 2023 Common Stock 27.5K Direct F1, F4
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -6.75K -25% $0.00 20.3K Mar 3, 2023 Common Stock 6.75K Direct F1, F5
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -4.38K -33.33% $0.00 8.75K Mar 3, 2023 Common Stock 4.38K Direct F1, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement.
F2 Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the RSUs and does not represent a sale by the reporting person.
F3 The option vests as to 2.0833% of the total shares monthly, beginning on April 1, 2023, with 100% of the total shares vested and exercisable on March 1, 2027, subject to the reporting person's provision of service to the issuer on each vesting date.
F4 The RSUs vest as to 1/4th of the total shares annually beginning on March 1, 2024, subject to continued service through each vesting date.
F5 The RSUs vest as to 1/4th of the total shares annually beginning on March 4, 2023, subject to continued service through each vesting date.
F6 The RSUs vest as to 1/4th of the total shares annually beginning on March 5, 2022, subject to continued service through each vesting date.