Form 4: Upstream Bio CFO Sells Shares
Insider Transaction (Form 4)
Michael Gray, CFO and COO of Upstream Bio, Inc., sold 853 shares of common stock on September 16, 2026 for $5.49 per share.
Summary
- Open-market sale: disposed of 853 Common Stock at $5.49 ($4,683) on September 16, 2026; holds 27,942 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative signal: an insider sold $4,683 of stock on the open market.
Insider Transactions
Michael Gray — Officer (CFO and COO)
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-09-16 | Open-market sale | Common Stock | 853 | $5 | $4.7K | 27,942 |
Key Dates
| Date | Description |
|---|---|
| 2026-09-16 | Open-market sale (853 shares) |
Keywords
insider transaction, Form 4, UPB, Upstream Bio, Inc., bearish, Michael Gray
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