Brunilda Shtylla - Mar 1, 2023 Form 3 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 1, 2023
Transactions value $
$0
Form type
3
Date filed
3/7/2023, 03:52 PM
Next filing
Mar 7, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding STRO Common Stock 18K Mar 1, 2023 Direct

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
holding STRO Stock Option (right to buy) Mar 1, 2023 Common Stock 281 $15.00 Direct F1
holding STRO Stock Option (right to buy) Mar 1, 2023 Common Stock 4.22K $15.00 Direct F1
holding STRO Stock Option (right to buy) Mar 1, 2023 Common Stock 175K $11.80 Direct F1
holding STRO Stock Option (right to buy) Mar 1, 2023 Common Stock 30K $21.11 Direct F2
holding STRO Stock Option (right to buy) Mar 1, 2023 Common Stock 28K $8.17 Direct F3
holding STRO Restricted Stock Unit (RSU) Mar 1, 2023 Common Stock 13.1K Direct F4, F5
holding STRO Restricted Stock Unit (RSU) Mar 1, 2023 Common Stock 27K Direct F5, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The option is fully vested and exercisable.
F2 The option vests as to 2.0833% of the total shares monthly, beginning on April 5, 2021, with 100% of the total shares vested and exercisable on March 5, 2025, subject to the reporting person's provision of service to the issuer on each vesting date.
F3 The option vests as to 2.0833% of the total shares monthly, beginning on April 4, 2022, with 100% of the total shares vested and exercisable on March 4, 2026, 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 5, 2022, subject to the reporting person's provision of service to the issuer on each vesting date.
F5 Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement.
F6 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.

Remarks:

Exhibit 24.1 - Power of Attorney