Bradford D. Dahms - 14 Jul 2025 Form 4 Insider Report for Jade Biosciences, Inc. (JBIO)

Role: Chief Financial Officer
Signature: /s/ Elizabeth Balta, as attorney-in-fact for Bradford D. Dahms
Issuer symbol: JBIO
Transactions as of: 14 Jul 2025
Net transactions value: $0
Form type: 4
Filing time: 14 Jul 2025, 19:12:40 UTC
Previous filing: 14 Feb 2024
Next filing: 13 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Dahms Bradford D.	Chief Financial Officer	C/O JADE BIOSCIENCES, INC., 221 CRESCENT ST., BLDG. 23, STE. 105, WALTHAM	/s/ Elizabeth Balta, as attorney-in-fact for Bradford D. Dahms	14 Jul 2025	0001787307

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	JBIO	Stock Option (Right to Buy)	Award	$0	+526,000		$0.000000	526,000	14 Jul 2025	Common Stock	526,000	$9.00	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This option represents a right to purchase 526,000 shares of the Issuer's common stock, one quarter of which will vest on July 14, 2026, with the remaining three quarters vesting in equal monthly installments over the following three years, subject to the Reporting Person's continued service to the Issuer on each such vesting date.