Upstream Bio, Inc. insider trading
UPB$4.85-0.19 (-3.77%)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-74.4%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- ECErez Chimovits8.3162%
- WBWellington Biomedical Innovation Master Investors (Cayman) II L.P.1.6336%
- EREverett Rand Sutherland0.1255%
- ADAaron Deykin0.059%
- MGMichael Gray0.051%
- AHAdam Houghton0.0418%
- AAAllison Ambrose0.0284%
- OAOrbimed Advisors LLCNot reported
- OCOrbiMed Capital GP VIII LLCNot reported
- AIAccess Industries Holdings LLCNot reported
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| UPB | Aaron Deykin | Open market sell$4.91K | -2.7% | $5.49 | $4.91K | Sep 16, 2026 | Sep 17, 2026 |
| UPB | Everett Rand Sutherland | Open market sell$11.5K | -3.0% | $5.49 | $11.5K | Sep 16, 2026 | Sep 17, 2026 |
| UPB | Adam Houghton | Open market sell$3.84K | -3.0% | $5.49 | $3.84K | Sep 16, 2026 | Sep 17, 2026 |
| UPB | Michael Gray | Open market sell$4.68K | -3.0% | $5.49 | $4.68K | Sep 16, 2026 | Sep 17, 2026 |
| UPB | Allison Ambrose | Open market sell$2.66K | -3.0% | $5.49 | $2.66K | Sep 16, 2026 | Sep 17, 2026 |
| UPB | Michael Gray | Open market sell$5.2K | -2.9% | $6.10 | $5.2K | Jun 16, 2026 | Jun 17, 2026 |
| UPB | Everett Rand Sutherland | Open market sell$12.8K | -2.9% | $6.10 | $12.8K | Jun 16, 2026 | Jun 17, 2026 |
| UPB | Adam Houghton | Open market sell$4.27K | -2.9% | $6.10 | $4.27K | Jun 16, 2026 | Jun 17, 2026 |
| UPB | Aaron Deykin | Open market sell$5.46K | -2.6% | $6.10 | $5.46K | Jun 16, 2026 | Jun 17, 2026 |
| UPB | Allison Ambrose | Open market sell$2.91K | -2.9% | $6.10 | $2.91K | Jun 16, 2026 | Jun 17, 2026 |
| UPB | Michael Gray | Open market sell$7.92K | -2.8% | $9.29 | $7.92K | Mar 16, 2026 | Mar 17, 2026 |
| UPB | Aaron Deykin | Open market sell$8.31K | -2.7% | $9.29 | $8.31K | Mar 16, 2026 | Mar 17, 2026 |
| UPB | Everett Rand Sutherland | Open market sell$19.4K | -2.8% | $9.29 | $19.4K | Mar 16, 2026 | Mar 17, 2026 |
| UPB | Allison Ambrose | Open market sell$4.41K | -2.8% | $9.29 | $4.41K | Mar 16, 2026 | Mar 17, 2026 |
| UPB | Adam Houghton | Open market sell$6.49K | -2.8% | $9.29 | $6.49K | Mar 16, 2026 | Mar 17, 2026 |