NORGES BANK

Holdings History for Upstream Bio, Inc. - Common Stock, par value $0.001 per share (UPB)

Symbol: UPB on Nasdaq
Investment type: Equity / Common Stock, par value $0.001 per share
Latest Disclosed Shares Owned: 2,882,647 shares
Security Ownership %: 5.3%

Shares, Excluding Options vs Price

Value, Excluding Options

Norges Bank ownership in Upstream Bio, Inc. Common Stock, par value $0.001 per share (UPB)

24 Oct 2025 - Norges Bank has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,882,647 shares of Upstream Bio, Inc. Common Stock, par value $0.001 per share (UPB). This represents 5.3% ownership of the company. This is the first filing by NORGES BANK disclosing ownership of Upstream Bio, Inc. Common Stock, par value $0.001 per share (UPB).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Norges Bank	5.3%		$54,226,626	2,882,647			$18.81	13G	30 Sep 2025	24 Oct 2025, 16:48

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	0.01%	+0.01%	$78,263,866	2,882,647	+2,882,647	NEW	$27.15	Q4 2025
30 Sep 2025		-0%	$0	0	-969,916	-100%	$8.02	Q3 2025
30 Jun 2025	0%	+0%	$10,649,678	969,916	+969,916	NEW	$10.98	Q2 2025
31 Mar 2025		-0%	$0	0	-1,000,000	-100%	$8.02	Q1 2025
31 Dec 2024	0%	+0%	$16,440,000	1,000,000	+1,000,000	NEW	$16.44	Q4 2024

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.