Sale of 485 shares at $5.49 per share.
Reporting Person Ambrose Allison · Officer Title General Counsel · Transaction Code S
Traded Sep 16, 2026 · Disclosed Sep 17, 2026
Source: SEC Form 4 · 0001193125-26-394318 · filed 2026-09-17 · View filing →
Composed from the Form 4 as filed with the SEC. Share counts, prices and dates are the filing's own; the disclosure lag is counted in business days from the transaction date to the filing date. What is a Form 4?
Cite this card
Desq Long. "Upstream Bio, Inc. (UPB)." Disclosed 2026-09-17. https://desqlong.com/cards/0001193125-26-394318-1 (retrieved 2026-09-26).