Laura Hamill - 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
Aug 6, 2024
Next filing
Aug 11, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hamill Laura Director C/O Y-MABS THERAPEUTICS, INC., 230 PARK AVENUE, SUITE 3350, NEW YORK /s/ John LaRocca, Attorney-in-Fact 2025-07-02 0001751804

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction YMAB Common Stock Award $0 +25.1K +430.56% $0.00 30.9K Jun 30, 2025 Direct F1

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 F2, F3
* 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 Stock options granted to the Reporting Person pursuant to the Issuer's 2018 Equity Incentive Plan.
F3 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.