Pauling David 4
4 · SUTRO BIOPHARMA, INC. · Filed Mar 6, 2026
Research Summary
AI-generated summary of this filing
Sutro (STRO) GC David Pauling Receives RSUs; Tax-Withheld Shares
What Happened
David Pauling, Chief Administrative Officer & General Counsel of Sutro Biopharma (STRO), had 675 restricted stock units (RSUs) convert/settle into common shares on March 4, 2026. The company withheld 277 of those shares to satisfy income tax withholding at $21.31 per share (total value withheld ≈ $5,903). After withholding, Pauling received 398 net shares. This was a vesting/settlement event (not an open-market purchase or sale by the insider).
Key Details
- Transaction date: March 4, 2026; Form 4 filed March 6, 2026 (timely filing).
- Conversion/settlement: 675 RSUs -> 675 shares (code M) at $0.00 reported per-share exercise price.
- Tax withholding: 277 shares withheld (code F) at $21.31/share = $5,903 withheld; withholding is not an open-market sale by the insider.
- Net shares received from this vesting: 398 shares.
- Shares beneficially owned after the transaction: not specified in the provided excerpt.
- Relevant footnotes: F1 = shares withheld to satisfy income tax withholding (not a sale); F2 = each RSU converts to one share; F3 = RSUs vest 1/4 annually with first tranche on 3/4/2023, subject to continued service.
Context
- Code M indicates conversion/exercise of a derivative (here, RSUs) into common stock. Code F shows shares withheld to cover tax obligations — a common administrative step in net settlements.
- This is a routine vesting/net-settlement event and does not necessarily signal a buy or sell decision by the insider.
Insider Transaction Report
Form 4
Pauling David
Chief Admin. Ofcr. & GC
Transactions
- Exercise/Conversion
Common Stock
2026-03-04+675→ 10,025 total - Tax Payment
Common Stock
[F1]2026-03-04$21.31/sh−277$5,903→ 9,748 total - Exercise/Conversion
Restricted Stock Units (RSUs)
[F2][F3]2026-03-04−675→ 0 totalExp: 2026-03-04→ Common Stock (675 underlying)
Footnotes (3)
- [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 vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 4, 2023, subject to continued service through each vesting date.
Signature
/s/ David Pauling|2026-03-06