<SEC-DOCUMENT>0000899140-17-000236-index.html : 20170214
<SEC-HEADER>0000899140-17-000236.hdr.sgml : 20170214
<ACCEPTANCE-DATETIME>20170214141510
ACCESSION NUMBER:		0000899140-17-000236
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20170214
DATE AS OF CHANGE:		20170214
GROUP MEMBERS:		CUBIST SYSTEMATIC STRATEGIES, LLC
GROUP MEMBERS:		POINT72 CAPITAL ADVISORS, INC.
GROUP MEMBERS:		STEVEN A. COHEN

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMAG PHARMACEUTICALS INC.
		CENTRAL INDEX KEY:			0000792977
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				042742593
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-38286
		FILM NUMBER:		17606949

	BUSINESS ADDRESS:	
		STREET 1:		1100 WINTER STREET
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		6174983300

	MAIL ADDRESS:	
		STREET 1:		1100 WINTER STREET
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADVANCED MAGNETICS INC
		DATE OF NAME CHANGE:	19920703

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Point72 Asset Management, L.P.
		CENTRAL INDEX KEY:			0001603466
		IRS NUMBER:				465064661
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		72 CUMMINGS POINT ROAD
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
		BUSINESS PHONE:		203-890-2000

	MAIL ADDRESS:	
		STREET 1:		72 CUMMINGS POINT ROAD
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>a19759172a.htm
<DESCRIPTION>AMENDMENT NO. 1
<TEXT>
Document 1 - file: a19759172a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>a19759172b.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: a19759172b.htm

</DOCUMENT>
</SEC-DOCUMENT>