Fairmount Funds Management LLC

13F Holdings History for Jade Biosciences, Inc. - Common Stock, $0.0001 par value per share (JBIO)

Symbol: JBIO on Nasdaq
Investment type: Equity / Common Stock, $0.0001 par value per share
Latest Disclosed Ownership: 10.4M shares
Security Ownership: 20%

Shares, Excluding Options vs Price

Value, Excluding Options

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

2025-10-08 - Fairmount Funds Management LLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 10.4M shares of Jade Biosciences, Inc. Common Stock, $0.0001 par value per share (JBIO). This represents 20% percent ownership of the company. In their previous filing dated 2025-05-01, Fairmount Funds Management LLC had reported owning 7.25M shares, indicating an increase of 42.8% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
Fairmount Funds Management LLC	19.99%		$89.4M	10.4M	+3,104,519	+42.8%	$8.63	13D/A	10/6/2025	8 Oct 2025 16:15:29
Fairmount Funds Management LLC	19.99%			7.25M				13D	4/28/2025	1 May 2025 18:31:59

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
9/30/2025		2.5%		$27.8M	3.22M			$8.63	Q3 2025
6/30/2025		4.17%	+4.17%	$32.2M	3.22M	+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.