Anne Elizabeth Borgman - 28 Feb 2025 Form 4 Insider Report for SUTRO BIOPHARMA, INC. (STRO)

Role
CHIEF MEDICAL OFFICER
Signature
/s/ Edward C. Albini as attorney-in-fact for Anne E. Borgman
Issuer symbol
STRO
Transactions as of
28 Feb 2025
Net transactions value
-$31,841
Form type
4
Filing time
04 Mar 2025, 17:57:10 UTC
Previous filing
30 Jan 2025
Next filing
05 May 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 +37,500 +154% $0.000000 61,874 28 Feb 2025 Direct
transaction STRO Common Stock Tax liability $24,494 -15,405 -25% $1.59 46,469 28 Feb 2025 Direct F1
transaction STRO Common Stock Options Exercise $0 +11,250 +24% $0.000000 57,719 01 Mar 2025 Direct
transaction STRO Common Stock Tax liability $7,347 -4,621 -8% $1.59 53,098 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 -37,500 -33% $0.000000 75,000 28 Feb 2025 Common Stock 37,500 Direct F2, F3
transaction STRO Restricted Stock Unit (RSU) Options Exercise $0 -11,250 -25% $0.000000 33,750 01 Mar 2025 Common Stock 11,250 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 RSU award vests as to 1/4th of the total award annually on the last calendar day of February, beginning on February 29, 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.