<SEC-DOCUMENT>0001387131-20-003800-index.html : 20200408
<SEC-HEADER>0001387131-20-003800.hdr.sgml : 20200408
<ACCEPTANCE-DATETIME>20200408203358
ACCESSION NUMBER:		0001387131-20-003800
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200403
FILED AS OF DATE:		20200408
DATE AS OF CHANGE:		20200408

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Shabet Rose Sharon
		CENTRAL INDEX KEY:			0001711393

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782973

	MAIL ADDRESS:	
		STREET 1:		C/O VIKING GLOBAL INVESTORS LP
		STREET 2:		280 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ott David C.
		CENTRAL INDEX KEY:			0001621842

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782974

	MAIL ADDRESS:	
		STREET 1:		C/O VIKING GLOBAL INVESTORS LP
		STREET 2:		280 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HALVORSEN OLE ANDREAS
		CENTRAL INDEX KEY:			0001133006

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782975

	MAIL ADDRESS:	
		STREET 1:		C/O VIKING GLOBAL INVESTORS LP
		STREET 2:		280 PARK AVE 35TH
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Viking Global Opportunities GP LLC
		CENTRAL INDEX KEY:			0001629476
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782976

	BUSINESS ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-863-5000

	MAIL ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Viking Global Opportunities Portfolio GP LLC
		CENTRAL INDEX KEY:			0001629472
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782977

	BUSINESS ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-863-5000

	MAIL ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

	FORMER NAME:	
		FORMER CONFORMED NAME:	VGO Portfolio GP LLC
		DATE OF NAME CHANGE:	20141230

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Viking Global Opportunities Illiquid Investments Sub-Master LP
		CENTRAL INDEX KEY:			0001629482
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782978

	BUSINESS ADDRESS:	
		STREET 1:		MORGAN STANLEY SERVICES (CAYMAN)
		STREET 2:		CRICKET SQ., HUTCHINS DR., P.O. BOX 2681
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1111
		BUSINESS PHONE:		441-295-9166

	MAIL ADDRESS:	
		STREET 1:		MORGAN STANLEY SERVICES (CAYMAN)
		STREET 2:		CRICKET SQ., HUTCHINS DR., P.O. BOX 2681
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1111

	FORMER NAME:	
		FORMER CONFORMED NAME:	VGO Illiquid Investments Sub-Master LP
		DATE OF NAME CHANGE:	20141230

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIKING GLOBAL INVESTORS LP
		CENTRAL INDEX KEY:			0001103804
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39263
		FILM NUMBER:		20782979

	BUSINESS ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		212-672-7050

	MAIL ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Zentalis Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001725160
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		530 SEVENTH AVENUE, SUITE 2201
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
		BUSINESS PHONE:		(212) 433-3791

	MAIL ADDRESS:	
		STREET 1:		530 SEVENTH AVENUE, SUITE 2201
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Zentalis Pharmaceuticals, LLC
		DATE OF NAME CHANGE:	20200107

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Zeno Pharma, LLC
		DATE OF NAME CHANGE:	20171212
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
Document 1 - file: ownership.html

Document 1 - RAW XML: ownership.xml

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