Y-mAbs Therapeutics, Inc.

230 Park Avenue, Suite 3350

New York, NY 10169


May 2, 2023




U.S. Securities and Exchange Commission
Division of Corporation Finance

100 F Street, N.E.
Washington, D.C. 20549


Attn:Daniel Crawford


Re:Y-mAbs Therapeutics, Inc.
 Registration Statement on Form S-3 (File No. 333-271006)
  Request for Acceleration of Effective Date


Mr. Crawford:


In accordance with Rule 461 under the Securities Act of 1933, as amended, the undersigned registrant (the “Registrant”) hereby requests that the Securities and Exchange Commission take appropriate action to cause the above-referenced Registration Statement on Form S-3 (File No. 333-271006) (the “Registration Statement”) to become effective on May 5, 2023, at 4:00 p.m. Eastern Time, or as soon thereafter as is practicable.


Once the Registration Statement has been declared effective, please orally confirm that event with Sarah Sellers of Cooley LLP, counsel to the Registrant, at (212) 479-6370, or in her absence, Divakar Gupta at (212) 479-6474.


[Signature page follows]





Very truly yours,
 Y-mAbs Therapeutics, Inc.
 By:/s/ Thomas Gad
  Thomas Gad
  Founder, President, Interim Chief Executive Officer and Head of Business Development



Sune R. Nyland, Y-mAbs Therapeutics, Inc.

Bo Kruse, Y-mAbs Therapeutics, Inc.

Sarah Sellers, Cooley LLP

Divakar Gupta, Cooley LLP


Signature Page to Company Acceleration Request – S-3