EDWARD C. ALBINI - 01 Mar 2025 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Signature
/s/ Edward C. Albini
Issuer symbol
STRO
Transactions as of
01 Mar 2025
Net transactions value
-$16,409
Form type
4
Filing time
04 Mar 2025, 18:44:18 UTC
Previous filing
22 Mar 2024
Next filing
06 Mar 2025

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STRO Common Stock Options Exercise $0 +7,875 +7.4% $0.000000 114,618 01 Mar 2025 Direct
transaction STRO Common Stock Options Exercise $0 +17,250 +15% $0.000000 131,868 01 Mar 2025 Direct
transaction STRO Common Stock Tax liability $16,409 -10,320 -7.8% $1.59 121,548 01 Mar 2025 Direct F1

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 Restricted Stock Unit (RSU) Options Exercise $0 -7,875 -33% $0.000000 15,750 01 Mar 2025 Common Stock 7,875 Direct F2, F3
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -17,250 -25% $0.000000 51,750 01 Mar 2025 Common Stock 17,250 Direct F2, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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 restricted stock units; does not represent a sale by the reporting person.
F2 Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement.
F3 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.
F4 The RSUs vest as to 1/4th of the total award annually beginning on March 1, 2025, subject to continued service through each vesting date.