SUTRO BIOPHARMA, INC. Forms 3, 4 and 5: Stock Options
Statements of beneficial ownership filed with the SEC by officers, directors and 10% owners: 12 rows in 2026. Transaction codes are the SEC's. Shares and prices are split-adjusted; the as-filed figure is underneath.
- 2026-06-05: Reporting owner Wigginton Jon Marc; Form 4; Security Stock Option (right to buy); Transaction A Grant, award or other acquisition pursuant to Rule 16b-3(d).
- 2026-06-05: Reporting owner Petree Daniel H; Form 4; Security Stock Option (right to buy); Transaction A Grant, award or other acquisition pursuant to Rule 16b-3(d).
- 2026-06-05: Reporting owner PANEK JAMES P; Form 4; Security Stock Option (right to buy); Transaction A Grant, award or other acquisition pursuant to Rule 16b-3(d).
- 2026-06-05: Reporting owner Lobacki Joseph M; Form 4; Security Stock Option (right to buy); Transaction A Grant, award or other acquisition pursuant to Rule 16b-3(d).
STRO insiders transactions against the stock price
Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close
Logarithmic scale. Both lines share the same starting value for the selected range.
Markers: each transaction type positioned at that session's split-adjusted close. Tooltips retain the reported transaction price when available.
| Transaction date | Reporting owner | Form | Security | Transaction | Shares | Price | Price that day | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-05 | Wigginton Jon Marc Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | Petree Daniel H Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | PANEK JAMES P Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | Lobacki Joseph M Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | Jagpal Sukhi Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | Hunter Heidi Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | Dybbs Michael Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-06-05 | MATSUI CONNIE Director | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +10,000 10,000 owned after | $26.09 exercise price | $26.09 | 2026-06-09 |
| 2026-03-02 | Pauling David Officer (Chief Admin. Ofcr. & GC) | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +33,600 33,600 owned after | $20.55 exercise price | $20.55 | 2026-03-03 |
| 2026-03-02 | Gerber Hans-Peter Officer (CHIEF SCIENTIFIC OFFICER) | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +40,000 40,000 owned after | $20.55 exercise price | $20.55 | 2026-03-03 |
| 2026-03-02 | Chow Gregory K. Officer (CFO) | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +40,000 40,000 owned after | $20.55 exercise price | $20.55 | 2026-03-03 |
| 2026-03-02 | Chung Jane Director, Officer (Chief Executive Officer) | 4 | Stock Option (right to buy) Derivative · Direct | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +175,000 175,000 owned after | $20.55 exercise price | $20.55 | 2026-03-03 |
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