Insider holders · CIK 0002022626
Upstream Bio, Inc. · UPB
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Everett Rand SutherlandChief Executive Officer | 68,717 | — | 68,717 | Sep 17, 2026 · 4:05 pm EDT | Form 4 |
| Aaron DeykinChief Medical Officer | 32,302 | — | 32,302 | Sep 17, 2026 · 4:05 pm EDT | Form 4 |
| Michael GrayCFO and COO | 27,942 | — | 27,942 | Sep 17, 2026 · 4:05 pm EDT | Form 4 |
| Adam HoughtonChief Business Officer | 22,901 | — | 22,901 | Sep 17, 2026 · 4:05 pm EDT | Form 4 |
| Allison AmbroseGeneral Counsel | 15,563 | — | 15,563 | Sep 17, 2026 · 4:05 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.