<SEC-DOCUMENT>0001193125-19-037897-index.html : 20190213
<SEC-HEADER>0001193125-19-037897.hdr.sgml : 20190213
<ACCEPTANCE-DATETIME>20190213155702
ACCESSION NUMBER:		0001193125-19-037897
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190213
DATE AS OF CHANGE:		20190213
GROUP MEMBERS:		BIOTECH TARGET N.V.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TESARO, Inc.
		CENTRAL INDEX KEY:			0001491576
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				272249687
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-86904
		FILM NUMBER:		19596931

	BUSINESS ADDRESS:	
		STREET 1:		1000 WINTER STREET, SUITE 3300
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		(339) 970-0900

	MAIL ADDRESS:	
		STREET 1:		1000 WINTER STREET, SUITE 3300
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Tesaro, Inc.
		DATE OF NAME CHANGE:	20100510

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BB BIOTECH AG
		CENTRAL INDEX KEY:			0000924223
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			V8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		SCHWERTSTRASSE 6
		CITY:			SCHAFFHAUSEN
		STATE:			V8
		ZIP:			8200
		BUSINESS PHONE:		411724 59 59

	MAIL ADDRESS:	
		STREET 1:		SCHWERTSTRASSE 6
		CITY:			SCHAFFHAUSEN
		STATE:			V8
		ZIP:			8200
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>d708258dsc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: d708258dsc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>