James Healy - Jun 30, 2025 Form 4 Insider Report for Y-mAbs Therapeutics, Inc. (YMAB)

Role: Director
Signature: /s/ John LaRocca, Attorney-in-Fact
Stock symbol: YMAB
Transactions as of: Jun 30, 2025
Transactions value $: $0
Form type: 4
Date filed: 7/2/2025, 04:20 PM
Previous filing: Jun 18, 2025
Next filing: Sep 18, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
HEALY JAMES	Director	C/O SOFINNOVA INVESTMENTS INC., 3000 SAND HILL ROAD, BLDG. 4, SUITE 250, MENLO PARK	/s/ John LaRocca, Attorney-in-Fact	2025-07-02	0001245624

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	YMAB	Common Stock	Award	$0	+25.1K	+79.36%	$0.00	56.7K	Jun 30, 2025	Direct	F1
holding	YMAB	Common Stock						2.19M	Jun 30, 2025	See footnote	F2

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	YMAB	Employee Stock Option (right to buy)	Award	$0	+33.5K		$0.00	33.5K	Jun 30, 2025	Common Stock	33.5K	$4.51	Direct	F3, F4

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

Explanation of Responses:

Id	Content
F1	Represents restricted stock units ("RSUs") granted to the Reporting Person pursuant to the Issuer's 2018 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of the Issuer's common stock on the vesting date of the RSUs. The RSUs vest in full on the earlier of the first anniversary of the date of grant or the date immediately preceding the date of the Issuer's annual meeting of stockholders held in 2026, subject to the Reporting Person's continued service to the Issuer on the vesting date.
F2	The Reporting Person is one of the managing members of the general partner of Sofinnova Management X-A, L.L.C., the general partner of Sofinnova Management X, L.P., the general partner of Sofinnova Venture Partners X, L.P., which directly holds the reported securities, and, as such, may be deemed to share voting and investment power over such shares. The Reporting Person disclaims beneficial ownership of the reported securities, except to the extent of his proportionate pecuniary interest in Sofinnova Ventures Partners X, L.P.
F3	Stock options granted to the Reporting Person pursuant to the Issuer's 2018 Equity Incentive Plan.
F4	The stock options vest in equal monthly installments until the first anniversary of the date of grant, subject to the Reporting Person's continued service to the Issuer on each vesting date, and are exercisable immediately upon vesting.