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Ambrose Allison
General Counsel at Upstream Bio. Filing since 16 Mar 2026.
CIK 0002047381
Company
Date
Role
Action
Shares
Amount
Of holding
UPB
Upstream Bio, Inc.
16 Sep 2026
General Counsel
Sold at will
485
$2.66K
3.0%
UPB
Upstream Bio, Inc.
16 Jun 2026
General Counsel
Sold at will
477
$2.91K
2.9%
UPB
Upstream Bio, Inc.
16 Mar 2026
General Counsel
Sold at will
475
$4.41K
2.8%
3 decisions on file.