<SEC-DOCUMENT>0001104659-18-057849-index.html : 20180920
<SEC-HEADER>0001104659-18-057849.hdr.sgml : 20180920
<ACCEPTANCE-DATETIME>20180920175827
ACCESSION NUMBER:		0001104659-18-057849
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180920
FILED AS OF DATE:		20180920
DATE AS OF CHANGE:		20180920

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GILL DAVID N
		CENTRAL INDEX KEY:			0001106519

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38650
		FILM NUMBER:		181080206

	MAIL ADDRESS:	
		STREET 1:		C/O NXSTAGE MEDICAL INC. (NXTM)
		STREET 2:		439 SOUTH UNION STREET, 5TH FLOOR
		CITY:			LAWRENCE
		STATE:			MA
		ZIP:			01843

ISSUER:		

	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

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>a3.xml
<DESCRIPTION>3
<TEXT>
Document 1 - file: a3.html

Document 1 - RAW XML: a3.xml

</DOCUMENT>
</SEC-DOCUMENT>