<SEC-DOCUMENT>0001097241-15-000004-index.html : 20150213
<SEC-HEADER>0001097241-15-000004.hdr.sgml : 20150213
<ACCEPTANCE-DATETIME>20150213104226
ACCESSION NUMBER:		0001097241-15-000004
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150213
DATE AS OF CHANGE:		20150213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IRONWOOD PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001446847
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				043404176
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-85292
		FILM NUMBER:		15610716

	BUSINESS ADDRESS:	
		STREET 1:		301 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-621-7722

	MAIL ADDRESS:	
		STREET 1:		301 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STATE OF WISCONSIN INVESTMENT BOARD
		CENTRAL INDEX KEY:			0000854157
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				396006423
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		121 EAST WILSON STREET
		CITY:			MADISON
		STATE:			WI
		ZIP:			53703
		BUSINESS PHONE:		6082662381

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 7842
		STREET 2:		121 EAST WILSON STREET
		CITY:			MADISON
		STATE:			WI
		ZIP:			53707
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ironwoodpharm201412swib.txt
<TEXT>
Document 1 - file: ironwoodpharm201412swib.txt

</DOCUMENT>
</SEC-DOCUMENT>