Form 4: Upstream Bio CEO Sells Shares for Tax Obligations

Upstream Bio's CEO, Everett Rand Sutherland, sold 2,093 shares of common stock at $9.29 per share to cover tax withholding obligations related to vested restricted stock units.

Summary

• Everett Rand Sutherland, Chief Executive Officer and Director of Upstream Bio, Inc. (UPB), reported a transaction involving the company's common stock.
• On March 16, 2026, Mr. Sutherland disposed of 2,093 shares of common stock.
• The shares were sold at a price of $9.29 per share.
• This sale was executed as a 'sell-to-cover' transaction to satisfy tax withholding obligations associated with the vesting of restricted stock units.
• The sale was automatic and not at the discretion of Mr. Sutherland.
• Following this transaction, Mr. Sutherland directly beneficially owns 72,907 shares of Upstream Bio, Inc. common stock.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event. The sale was non-discretionary and solely for tax purposes, which is a standard practice for executive compensation and does not reflect a change in management's confidence or outlook.

Positives

• The transaction was a non-discretionary 'sell-to-cover' to meet tax obligations, indicating it was not a voluntary sale based on a change in management's outlook on the company.

Negatives

• The transaction represents a reduction in the CEO's direct beneficial ownership of common stock, although it is for tax purposes rather than a discretionary sale.

Future Outlook

This filing does not contain any forward-looking statements or guidance regarding the company's future performance or strategic direction.

Management Comments

• The Issuer has adopted a 'sell-to-cover' policy to satisfy the tax withholding obligations of the Reporting Person.
• The sales reported on this Form 4 represent the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units.
• Such sales were automatic and not at the discretion of the Reporting Person.

Industry Context

StockSavvy.ai notes that 'sell-to-cover' transactions are a common and routine practice for executives to manage tax liabilities arising from the vesting of equity awards. This type of transaction is generally not indicative of management's sentiment towards the company's future prospects, unlike discretionary open-market sales.

Stakeholder Impact

• Shareholders: Minimal direct impact as this is a routine, non-discretionary transaction for tax purposes, not a signal of management's view on the stock's future.

Key Dates

Keywords

Upstream Bio, UPB, Everett Rand Sutherland, CEO, Insider Trading, Form 4, Stock Sale, Sell-to-Cover, Restricted Stock Units, Tax Obligations