William J. Newell - 01 Mar 2025 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
CEO, Director
Signature
/s/ Edward C. Albini as attorney-in-fact for William J. Newell
Issuer symbol
STRO
Transactions as of
01 Mar 2025
Net transactions value
-$40,073
Form type
4
Filing time
04 Mar 2025, 18:32:10 UTC
Previous filing
22 Mar 2024
Next filing
06 Mar 2025
SEC
View on sec.gov

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STRO Common Stock Options Exercise $0 +23,750 +11% $0.000000 243,953 01 Mar 2025 Direct
transaction STRO Common Stock Options Exercise $0 +41,750 +17% $0.000000 285,703 01 Mar 2025 Direct
transaction STRO Common Stock Tax liability $40,073 -25,203 -8.8% $1.59 260,500 01 Mar 2025 Direct F1
holding STRO Common Stock 116,525 01 Mar 2025 By William J. Newell Family Trust DTD 03/15/2019 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 Restricted Stock Unit (RSU) Options Exercise $0 -23,750 -33% $0.000000 47,500 01 Mar 2025 Common Stock 23,750 Direct F3, F4
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -41,750 -25% $0.000000 125,250 01 Mar 2025 Common Stock 41,750 Direct F3, F5
* 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 The securities are held of record by the reporting person as trustee of the William J. Newell Family Trust DTD 03/15/2019.
F3 Each RSU represents a contingent right to receive one (1) share of the issuer's Common Stock upon settlement.
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 award annually beginning on March 1, 2025, subject to continued service through each vesting date.