<SEC-DOCUMENT>0001144204-19-018629-index.html : 20190408
<SEC-HEADER>0001144204-19-018629.hdr.sgml : 20190408
<ACCEPTANCE-DATETIME>20190408151939
ACCESSION NUMBER:		0001144204-19-018629
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190408
DATE AS OF CHANGE:		20190408

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:		19737329

	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:			Jackson Square Partners, LLC
		CENTRAL INDEX KEY:			0001605911
		IRS NUMBER:				800945254
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		101 CALIFORNIA STREET
		STREET 2:		STE 3750
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4152164700

	MAIL ADDRESS:	
		STREET 1:		101 CALIFORNIA STREET
		STREET 2:		STE 3750
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>tv518423_sc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: tv518423_sc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>