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$JBIO All transactions

Jade Biosciences, Inc.

A

$ Value

$0

Shares

23,017

Price

$0

Filed

May 1

Insider

Name

Fairmount Funds Management LLC

Title

CIK

0001802528

Roles

Director 10% Owner

Transaction Details

Transaction Date

2025-04-29

Code

A

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

23,017

Footnotes

This option represents a right to purchase 23,017 shares of the Issuer's common stock, which vests in full on the earlier of (i) April 29, 2026 or (ii) the date of the next annual meeting of the Issuer's stockholders, in each case, subject to the recipient's continued service to the Issuer. | Under Mr. Kiselak's arrangement with Fairmount Funds Management LLC ("Fairmount"), Mr. Kiselak holds the option for one or more investment vehicles managed by Fairmount (each, a "Fairmount Fund"). Mr. Kiselak is obligated to turn over to Fairmount any net cash or stock received from the option for the benefit of such Fairmount Fund. Mr. Kiselak therefore disclaims beneficial ownership of the option and underlying common stock. Fairmount disclaims beneficial ownership of any of the reported securities, except to the extent of its pecuniary interest therein.

Filing Info

Accession No.

0000950170-25-062123

Form Type

4

Issuer CIK

0001798749

Fairmount Funds Management LLC's History

Date Ticker Type Value
2026-03-31 COGT C
2026-03-31 COGT $242.6M
2026-03-31 COGT C $0
2026-03-31 ZBIO $3.0M
2026-03-23 DMRA A $0
2026-01-22 APGE $133.5M
2026-01-22 COGT $127.4M
2025-12-04 CBIO $18.2M
2025-12-04 CBIO $1.8M
2025-10-23 VRDN $10.0M

Other Insiders at JBIO (90d)

No other insider activity at this issuer in the last 90 days.