Sutro Biopharma CSO exercises 3,750 RSUs
Sutro Biopharma’s chief scientific officer settled 3,750 RSUs into common stock, with a portion of shares withheld to cover taxes.
Rhea-AI Filing Summary
SUTRO BIOPHARMA, INC. (STRO) reported that its Chief Scientific Officer, Hans-Peter Gerber, exercised 3,750 Restricted Stock Units into an equal number of shares of common stock on September 18, 2026. Of these shares, 1,345 were withheld by the company at $15.34 per share to cover income tax withholding obligations, which the filing states does not represent a sale by the officer. The RSU award vests in four annual tranches starting September 18, 2024, subject to continued service.
Positive
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Negative
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Insider Trade Summary
3,750 shares exercised/converted
Exercise
3 txns
Insider
Gerber Hans-Peter
Role
CHIEF SCIENTIFIC OFFICER
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units (RSUs) F3, F4 | 3,750 | $0.00 | $0.00 |
| Exercise | Common Stock F1 | 3,750 | $0.00 | $0.00 |
| Tax Withholding | Common Stock F2 | 1,345 | $15.34 | $21K |
Holdings After Transaction:
Restricted Stock Units (RSUs) — 3,750 contracts (Direct);
Common Stock — 12,367 shares (Direct)
Footnotes (4)
- F1. The reported total includes 444 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).
- F2. 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.
- F3. Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement.
- F4. The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on September 18, 2024, subject to the reporting person's continued service through each vesting date.
Key Figures
RSUs exercised: 3,750 units
Shares withheld for taxes: 1,345 shares
Withholding price per share: $15.34 per share
+2 more
5 metrics
RSUs exercised
3,750 units
Restricted Stock Units converted into common stock on September 18, 2026
Shares withheld for taxes
1,345 shares
Common stock withheld to satisfy income tax withholding obligations
Withholding price per share
$15.34 per share
Value used for shares withheld for tax remittance
ESPP shares included in total holdings
444 shares
Common stock acquired under the Employee Stock Purchase Plan
RSU vesting schedule
1/4 annually
RSUs vest in four equal annual tranches starting September 18, 2024
Key Terms
Restricted Stock Units (RSUs), net settlement, Employee Stock Purchase Plan, income tax withholding
4 terms
Restricted Stock Units (RSUs) financial
"The reported security is described as Restricted Stock Units (RSUs)"
Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.
net settlement financial
"in connection with the net settlement of restricted stock units"
Employee Stock Purchase Plan financial
"transactions with the Issuer pursuant to its Employee Stock Purchase Plan"
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
income tax withholding financial
"withheld by the Issuer to satisfy its income tax withholding"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider equity activity did STRO report for its Chief Scientific Officer?
STRO reported that Chief Scientific Officer Hans-Peter Gerber exercised 3,750 RSUs into common stock on September 18, 2026. These RSUs convert into one share of common stock each upon settlement, according to the disclosure.
What are the vesting terms of the RSUs reported for STRO’s Chief Scientific Officer?
The RSUs vest as to 1/4 of the total award annually, with the first tranche having vested on September 18, 2024. Each subsequent tranche vests on the annual anniversary, subject to the officer’s continued service.
Were the RSU exercises for STRO done under a Rule 10b5-1 trading plan?
No. The filing’s Rule 10b5-1 checkbox is not marked as being pursuant to a trading plan, and there is no footnote indicating that these transactions were made under a Rule 10b5-1 or similar pre-arranged trading arrangement.
What does each RSU represent in the STRO insider transaction?
Each Restricted Stock Unit reported represents a contingent right to receive one share of Sutro Biopharma’s common stock upon settlement. In this filing, 3,750 RSUs were settled into the same number of common shares.
AI-generated analysis. How Rhea-AI works. Not financial advice.
