Upstream Bio, Inc.
UPBReported to SECin USCIK 0002022626Filings at SEC EDGAR
No score on this page, by design. Everything here is a fact from a public U.S. register: insider filings at the SEC (Form 4), lobbying filings under the Lobbying Disclosure Act, trades reported by members of Congress under the STOCK Act, and fund holdings in 13F filings. Our scores, percentiles and signals run on the Dutch register only, because that is the only register the model has been validated on.
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Filings
Most recent filing first: every line of every Form 4 at this company that passed our review, the same lines as on the register. Reported is the day the filing reached the SEC, usually within two business days of the trade. Amounts are in U.S. dollars, as the form states them.
| Filed by | Type | Value | Reported | Filed by | Value | Type | Shares | Reported |
|---|---|---|---|---|---|---|---|---|
| Deykin AaronChief Medical Officer | Open-market sell | $4,914895 shares | Sep 17, 2026 | Deykin AaronChief Medical Officer | $4,914 | Open-market sell | 895 | Sep 17, 2026 |
| Sutherland Everett RandChief Executive Officer | Open-market sell | $11,5022,095 shares | Sep 17, 2026 | Sutherland Everett RandChief Executive Officer | $11,502 | Open-market sell | 2,095 | Sep 17, 2026 |
| Houghton AdamChief Business Officer | Open-market sell | $3,843700 shares | Sep 17, 2026 | Houghton AdamChief Business Officer | $3,843 | Open-market sell | 700 | Sep 17, 2026 |
| GRAY MICHAELCFO and COO | Open-market sell | $4,683853 shares | Sep 17, 2026 | GRAY MICHAELCFO and COO | $4,683 | Open-market sell | 853 | Sep 17, 2026 |
| Ambrose AllisonGeneral Counsel | Open-market sell | $2,663485 shares | Sep 17, 2026 | Ambrose AllisonGeneral Counsel | $2,663 | Open-market sell | 485 | Sep 17, 2026 |