<SEC-DOCUMENT>0001387131-20-001273-index.html : 20200211
<SEC-HEADER>0001387131-20-001273.hdr.sgml : 20200211
<ACCEPTANCE-DATETIME>20200211124142
ACCESSION NUMBER:		0001387131-20-001273
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200211
DATE AS OF CHANGE:		20200211
GROUP MEMBERS:		DAVID C. OTT
GROUP MEMBERS:		O. ANDREAS HALVORSEN
GROUP MEMBERS:		ROSE S. SHABET
GROUP MEMBERS:		VIKING GLOBAL EQUITIES II LP
GROUP MEMBERS:		VIKING GLOBAL EQUITIES MASTER LTD.
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES GP LLC
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP
GROUP MEMBERS:		VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC
GROUP MEMBERS:		VIKING GLOBAL PERFORMANCE LLC
GROUP MEMBERS:		VIKING LONG FUND GP LLC
GROUP MEMBERS:		VIKING LONG FUND MASTER LTD.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Adaptive Biotechnologies Corp
		CENTRAL INDEX KEY:			0001478320
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				270907024
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91363
		FILM NUMBER:		20595502

	BUSINESS ADDRESS:	
		STREET 1:		1551 EASTLAKE AVENUE EAST SUITE 200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98102
		BUSINESS PHONE:		206-659-0067

	MAIL ADDRESS:	
		STREET 1:		1551 EASTLAKE AVENUE EAST SUITE 200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Adaptive TCR Corp
		DATE OF NAME CHANGE:	20091209

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

	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
<SEQUENCE>1
<FILENAME>adpt-sc13g_123119.htm
<DESCRIPTION>ACQUISITION OF BENEFICIAL OWNERSHIP
<TEXT>
Document 1 - file: adpt-sc13g_123119.htm

</DOCUMENT>
</SEC-DOCUMENT>