Upstream Bio, Inc. (UPB)

A dash means the company reported no figure in that column; 0 means it reported zero. Figures are as printed in the filing, without adjustment.

Three-year trend — total compensation per named executive

Prior-year totals as disclosed in the corresponding proxy; deltas are computed values with the derivation shown in the register.

You have just read Upstream Bio, Inc.'s Summary Compensation Table. The whole free brief as a PDF, emailed now, with every figure cited — then a few short notes on the deeper UPB reports.

We send the PDF right away, then up to three short notes. Reply “unsubscribe” to any of them, any time.

One page per officer: the same table above, read for one person at a time — his own figure and every fiscal year the register holds.

One page per director: the seat, the committees and the fee table, read for one person at a time.

Every insider equity transaction reported on Form 4 after the 2025 proxy statement — acquisitions, dispositions, exercises, and withholdings — and therefore not reflected in any table in that document.

Transaction codes per Form 4: A acquisition · S open-market sale · F tax withholding · M option exercise · G gift. Value = shares × price as reported. Dividend-equivalent and fractional-share accrual rows (derivative Class A, under $10,000 and under 2,000 shares) are aggregated per date; every row appears in full below.

% performance-vested = PSU grant-date fair value ÷ (RSU + PSU + Options), a computed value with the derivation shown in the register.

Our executive compensation philosophy is to provide a competitive and market-based total compensation program to attract, motivate, and retain our executive team. Our compensation is based heavily on performance, which aligns with our goal to drive long-term growth and value creation.

Computed as the sum of the director compensation table rows above; inputs and formula shown in the register.

Most recent fiscal-year chief executive compensation at each disclosed peer, taken from that company's own proxy statement.

Each peer's compensation is from its most recently filed proxy; fiscal years differ by company. Each peer's figures come from its own filings; the subject company is highlighted. Peers whose chief executive compensation is outside our coverage universe are stated as such, never left blank.

Answers are drawn only from the figures disclosed in this brief and cited to their location in the source filing. Where a figure required for an answer is not disclosed, that is stated rather than estimated.

Each figure's location is given both for the eye (section · page · table · row · column) and for a script (table/row/column index and exact character span in the filed document). Any figure can be independently confirmed against the source.

The Pay Desk — the free weekly executive pay briefing, one company at a time, every number traceable to a public filing.

You'll confirm on The Pay Desk's sign-up page.