FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

HEALY JAMES
2. Issuer Name and Ticker or Trading Symbol

Y-mAbs Therapeutics, Inc. [ YMAB ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O SOFINNOVA INVESTMENTS INC., 3000 SAND HILL ROAD, BLDG. 4, SUITE 250
3. Date of Earliest Transaction (MM/DD/YYYY)

6/23/2020
(Street)

MENLO PARK, CA 94025
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Non-Employee Stock Option (right to buy) (1)$48.67 6/23/2020  A   16000    7/23/2020 (2)6/23/2030 Common stock 16000 $0 16000 D  

Explanation of Responses:
(1) Stock options granted to the Reporting Person as a non-employee director pursuant to the 2018 Equity Incentive Plan of Y-mAbs Therapeutics, Inc.
(2) The stock options vest in equal monthly installments during the first year following the date of grant, subject to the Reporting Person's continued service on the board of directors of Y-mAbs Therapeutics, Inc., and are exercisable immediately upon vesting.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
HEALY JAMES
C/O SOFINNOVA INVESTMENTS INC.
3000 SAND HILL ROAD, BLDG. 4, SUITE 250
MENLO PARK, CA 94025
X



Signatures
/s/ James Healy6/24/2020
**Signature of Reporting PersonDate

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