<SEC-DOCUMENT>0001387131-21-002336-index.html : 20210216
<SEC-HEADER>0001387131-21-002336.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210212195219
ACCESSION NUMBER:		0001387131-21-002336
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210212
GROUP MEMBERS:		DAVID C. OTT
GROUP MEMBERS:		O. ANDREAS HALVORSEN
GROUP MEMBERS:		ROSE S. SHABET
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES GP LLC
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES LIQUID PORTFOLIO SUB-MASTER LP
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC

SUBJECT COMPANY:	

	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

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91478
		FILM NUMBER:		21631254

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VIKING GLOBAL INVESTORS LP
		CENTRAL INDEX KEY:			0001103804
		IRS NUMBER:				134055118
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>zntl-sc13ga_123120.htm
<DESCRIPTION>AMENDMENT NO. 1
<TEXT>
Document 1 - file: zntl-sc13ga_123120.htm

</DOCUMENT>
</SEC-DOCUMENT>