Ambrose Allison

Ambrose Allison is listed in filings as General Counsel at Upstream Bio, Inc.. This profile follows SEC Form 4 activity through Mar 17, 2026, including sale activity. Recent filings connect the profile to Upstream Bio, Inc. (UPB). The current snapshot covers public activity from Jan 6, 2026 to Mar 17, 2026. Reported amounts are shown as $4.4K to $1.4M. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.