UPB holders · FMR LLC 13F · UPB stock

FMR LLC Upstream Bio, Inc. (UPB) 13F holding

FMR LLC reported 8,162,897 UPB shares valued at $56.5M as of 2026-06-30. Share lines from that 13F summed, options excluded; value is the 13F-reported market value in US dollars, as reported on Form 13F, not a live feed.

Not investment advice. Holdings as reported on Form 13F; EDGAR is the official record.