Fairmount Funds Management LLC

Holdings History for Jade Biosciences, Inc. - Common Stock, par value $0.0001 per share (JBIO)

Symbol: JBIO on Nasdaq
Investment type: Equity / Common Stock, par value $0.0001 per share
Latest Disclosed Shares Owned: 10,353,875 shares
Security Ownership %: 20%

Shares, Excluding Options vs Price

Value, Excluding Options

Fairmount Funds Management LLC ownership in Jade Biosciences, Inc. Common Stock, par value $0.0001 per share (JBIO)

08 Oct 2025 - Fairmount Funds Management LLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 10,353,875 shares of Jade Biosciences, Inc. Common Stock, par value $0.0001 per share (JBIO). This represents 20% ownership of the company. In their previous filing dated 01 May 2025, Fairmount Funds Management LLC had reported owning 7,249,356 shares, indicating an increase of +43%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Fairmount Funds Management LLC	20%	0%	$89,373,614	10,353,875	+3,104,519	+43%	$8.63	13D/A	06 Oct 2025	08 Oct 2025, 16:15
Fairmount Funds Management LLC	20%		$73,508,470	7,249,356			$10.14	13D	28 Apr 2025	01 May 2025, 18:31

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	5.3%	+1.6%	$70,260,412	4,553,494	+1,333,126	+41%	$15.43	Q4 2025
30 Sep 2025	2.5%	0%	$27,791,776	3,220,368	0		$8.63	Q3 2025
30 Jun 2025	4.2%	+4.2%	$32,171,476	3,220,368	+3,220,368	NEW	$9.99	Q2 2025

* 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.