Insider · CIK 0002047381
Allison Ambrose
officer
Files at UPB (Upstream Bio, Inc.). First filing Sep 17, 2026, latest Sep 17, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 1
$0 bought, $2,663 sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
UPB: Upstream Bio, Inc.
UPBOct 9, 2026 · close 4.70
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | Upstream Bio, Inc. | $2,663 485 shares | -3% | 0% from low-84% from high |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | UPB Upstream Bio, Inc. | SOpen-market sale Common Stock | -485 | $5.49 | $2,663 | 15,563 | 24 d ago |
| Feb 6, 2025 | UPB Upstream Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +25,000 | $0.00 | $0 | 25,000 | Feb 7, 2025 |
| Dec 16, 2024 | UPB Upstream Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +100,000 | $0.00 | $0 | 100,000 | Dec 17, 2024 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.