<SEC-DOCUMENT>0001654954-19-011730-index.html : 20191015
<SEC-HEADER>0001654954-19-011730.hdr.sgml : 20191015
<ACCEPTANCE-DATETIME>20191015095102
ACCESSION NUMBER:		0001654954-19-011730
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20191015
DATE AS OF CHANGE:		20191015

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
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-38286
		FILM NUMBER:		191149704

	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:	AMAG PHARMACEUTICALS INC.
		DATE OF NAME CHANGE:	20070724

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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Camber Capital Management LP
		CENTRAL INDEX KEY:			0001444043
		IRS NUMBER:				421693587
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		101 HUNTINGTON AVENUE
		STREET 2:		SUITE 2101
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199
		BUSINESS PHONE:		617-717-6600

	MAIL ADDRESS:	
		STREET 1:		101 HUNTINGTON AVENUE
		STREET 2:		SUITE 2101
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Camber Capital Management LLC
		DATE OF NAME CHANGE:	20080827
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>camberAMAG-201913g.htm
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
Document 1 - file: camberAMAG-201913g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>2
<FILENAME>AMAG13g2019ex1.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: AMAG13g2019ex1.htm

</DOCUMENT>
</SEC-DOCUMENT>