<SEC-DOCUMENT>0001085146-17-000907-index.html : 20170407
<SEC-HEADER>0001085146-17-000907.hdr.sgml : 20170407
<ACCEPTANCE-DATETIME>20170407152154
ACCESSION NUMBER:		0001085146-17-000907
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170407
DATE AS OF CHANGE:		20170407

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARIAD PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0000884731
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				223106987
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48751
		FILM NUMBER:		17749364

	BUSINESS ADDRESS:	
		STREET 1:		125 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		6174940400

	MAIL ADDRESS:	
		STREET 1:		125 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTFIELD CAPITAL MANAGEMENT CO LP
		CENTRAL INDEX KEY:			0001177719
		IRS NUMBER:				800175963
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE FINANCIAL CENTER
		STREET 2:		23RD FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02111
		BUSINESS PHONE:		6174287100

	MAIL ADDRESS:	
		STREET 1:		ONE FINANCIAL CENTER
		STREET 2:		23RD FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02111

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WESTFIELD CAPITAL MANAGEMENT CO LLC
		DATE OF NAME CHANGE:	20020717
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ariaa2_40717.htm
<DESCRIPTION>WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.
<TEXT>
Document 1 - file: ariaa2_40717.htm

</DOCUMENT>
</SEC-DOCUMENT>