Ambrose Allison

CIK: 0002047381•General Counsel

Officer

Primary company: Upstream Bio, Inc. (UPB)

Ambrose Allison is a corporate insider (General Counsel) at Upstream Bio, Inc. (UPB) filing SEC Form 4 transactions. 3 transactions. Source: SEC EDGAR.

Total Transactions

Total Buy Value

Total Sell Value

Net Activity

Last Transaction

Sep 2026

Companies

Transaction History

Filter:

Source: SEC EDGAR Form 4 insider transaction filings.

Company	Type	Shares	Price	Value	Shares After	Date	SEC
Upstream Bio, Inc. UPB	Sale	485	$5.49	$3K	15,563	9/16/2026 Filed: 9/16/2026	Filing →
Upstream Bio, Inc. UPB	Award	25,000	$8.53	$213K	25,000	2/6/2025 Filed: 2/7/2025	Filing →
Upstream Bio, Inc. UPB	Award	100,000	-	-	100,000	12/16/2024 Filed: 12/17/2024	Filing →

Upstream Bio, Inc.

UPB

Type

Sale

485

Price

$5.49

Value

$3K

Upstream Bio, Inc.

UPB

Type

Award

25,000

Price

$8.53

Value

$213K

Upstream Bio, Inc.

UPB

Type

Award

100,000

Price

Value

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