Sutro Biopharma (STRO) CEO receives RSU and option grants, shares withheld for taxes
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Sutro Biopharma CEO Jane Chung reported multiple equity award and vesting transactions. She received a grant of 40,000 Restricted Stock Units (RSUs) and a stock option for 175,000 shares, both with service-based vesting schedules over time.
RSUs previously granted to her vested on March 1 and March 2, 2026, and were settled into common stock through several derivative exercises. In connection with these vestings, a total of 2,779 shares at $20.55 and 1,271 shares at $20.47 of common stock were withheld by the company to cover income tax obligations, which the footnotes state do not represent sales by the reporting person.
Positive
- None.
Negative
- None.
Insider Trade Summary
10,938 shares exercised/converted
Mixed
10 txns
Insider
Chung Jane
Role
Chief Executive Officer
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units (RSUs) | 7,750 | $0.00 | -- |
| Grant/Award | Restricted Stock Units (RSUs) | 40,000 | $0.00 | -- |
| Grant/Award | Stock Option (right to buy) | 175,000 | $0.00 | -- |
| Exercise | Common Stock | 7,750 | $0.00 | -- |
| Tax Withholding | Common Stock | 2,779 | $20.55 | $57K |
| Exercise | Restricted Stock Units (RSUs) | 688 | $0.00 | -- |
| Exercise | Restricted Stock Units (RSUs) | 2,500 | $0.00 | -- |
| Exercise | Common Stock | 688 | $0.00 | -- |
| Exercise | Common Stock | 2,500 | $0.00 | -- |
| Tax Withholding | Common Stock | 1,271 | $20.47 | $26K |
Holdings After Transaction:
Restricted Stock Units (RSUs) — 23,250 shares (Direct);
Stock Option (right to buy) — 175,000 shares (Direct);
Common Stock — 23,558 shares (Direct)
Footnotes (1)
- 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. Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement. The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 1, 2024, subject to continued service through each vesting date. The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 1, 2025, subject to continued service through each vesting date. The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 2, 2026, subject to continued service through each vesting date. 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. 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.
FAQ
What insider transactions did STRO CEO Jane Chung report on this Form 4?
Jane Chung reported RSU vesting, new RSU and option grants, and related tax withholding. Several RSU awards converted into common stock, while new grants of 40,000 RSUs and 175,000 stock options were awarded, all subject to continued service-based vesting over future dates.
How many RSUs were granted to STRO CEO Jane Chung in this filing?
She received a grant of 40,000 Restricted Stock Units. Each RSU represents a contingent right to one share of Sutro Biopharma common stock upon settlement, with the award vesting in four annual installments starting March 1, 2027, conditioned on continued employment service.
What stock options were awarded to STRO CEO Jane Chung?
She was granted a stock option covering 175,000 shares of common stock. According to the footnotes, one forty-eighth of this option vests monthly, beginning April 1, 2026, provided she continues serving the company through each applicable vesting date.
How do the RSU awards for STRO’s CEO vest over time?
Each RSU award vests in four annual tranches of one quarter of the total award. Different grants start vesting on March 1, 2024, March 1, 2025, March 2, 2026, and March 1, 2027, all requiring Jane Chung’s continued service through each vesting date.
What happened when Jane Chung’s RSUs vested into STRO common stock?
When RSUs vested, they were settled into common stock through derivative exercises coded M. A portion of the resulting shares was withheld by the issuer to cover income tax liabilities, leaving the remainder as directly held common shares in her reported ownership.