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SUTRO BIOPHARMA, INC.·4

Mar 3, 6:51 PM ET

Chow Gregory K. 4

4 · SUTRO BIOPHARMA, INC. · Filed Mar 3, 2026

Insider Transaction Report

Form 4
Period: 2026-03-02
SUTRO BIOPHARMA, INC.STRO
Chow Gregory K.
CFO
Transactions
  • Award

    Stock Option (right to buy)

    [F1]
    2026-03-02+40,000→ 40,000 total
    Exercise: $20.55Exp: 2036-03-02→ Common Stock (40,000 underlying)
  • Award

    Restricted Stock Units (RSUs)

    [F2][F3]
    2026-03-02+5,000→ 5,000 total
    Exp: 2030-03-01→ Common Stock (5,000 underlying)
Footnotes (3)
  • [F1]1/48 of the total option award shall vest monthly, subject to the reporting person's continued service through each vesting date, with the first tranche vesting on April 1, 2026.
  • [F2]Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement.
  • [F3]The RSUs shall vest as to 1/4 of the total award annually, with the first tranche vesting on March 1, 2027, subject to continued service through each vesting date.
Signature
/s/ David Pauling as attorney-in-fact|2026-03-03

Documents

1 file
  • 4
    form4-03032026_110348.xmlPrimary