<SEC-DOCUMENT>0000921895-20-000559-index.html : 20200214
<SEC-HEADER>0000921895-20-000559.hdr.sgml : 20200214
<ACCEPTANCE-DATETIME>20200214161034
ACCESSION NUMBER:		0000921895-20-000559
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200214
DATE AS OF CHANGE:		20200214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Y-mAbs Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001722964
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				474619612
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90649
		FILM NUMBER:		20619754

	BUSINESS ADDRESS:	
		STREET 1:		750 THIRD AVENUE
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212-847-9841

	MAIL ADDRESS:	
		STREET 1:		750 THIRD AVENUE
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Memorial Sloan Kettering Cancer Center
		CENTRAL INDEX KEY:			0001566787
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			NY

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065
		BUSINESS PHONE:		212-639-2000

	MAIL ADDRESS:	
		STREET 1:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Memorial Sloan-Kettering Cancer Center
		DATE OF NAME CHANGE:	20130111
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>sc13ga110109yma_02142020.htm
<TEXT>
Document 1 - file: sc13ga110109yma_02142020.htm

</DOCUMENT>
</SEC-DOCUMENT>