Form 4 for STRO SUTRO BIOPHARMA, INC.
Accepted 2026-06-02 16:16:04 ET · period of report 2026-06-02 · accession 0001761333-26-000005 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-06-02 16:16 | 2026-06-02 | STRO | Chow Gregory K. | CFO | M - OptEx | $0.00 | +2,500 | 4,725 | +112% | $0 |
| D | 2026-06-02 16:16 | 2026-06-02 | STRO | Chow Gregory K. | CFO | M - OptEx | $0.00 | -2,500 | 7,500 | -25% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-06-02 | M | A | 2,500 | $0.00 | 4,725 | D | — | — | (F1) For avoidance of doubt, the reporting person elected to satisfy tax withholding liabilities in cash in lieu of withholding shares. (F2) The reported total includes 250 shares of Common Stock acquired by the reporting person in one or more transactions with the Issuer pursuant to its employee stock purchase plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c). |
| 2 | Derivative | Restricted Stock Units (RSUs) | 2026-06-02 | M | D | 2,500 | $0.00 | 7,500 | D | — · — to 2029-06-02 | 2,500 Common Stock | (F3) Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement. (F4) The award vested or vests annually as to 1/4th of the total award, subject to the reporting person's continued service to the Issuer on each vesting date, with the first tranche vested on June 2, 2026. |