<SEC-DOCUMENT>0001274173-20-000094-index.html : 20200214
<SEC-HEADER>0001274173-20-000094.hdr.sgml : 20200214
<ACCEPTANCE-DATETIME>20200214151414
ACCESSION NUMBER:		0001274173-20-000094
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200214
DATE AS OF CHANGE:		20200214

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
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-85292
		FILM NUMBER:		20618574

	BUSINESS ADDRESS:	
		STREET 1:		100 SUMMER STREET, SUITE 2300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-621-7722

	MAIL ADDRESS:	
		STREET 1:		100 SUMMER STREET, SUITE 2300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JANUS HENDERSON GROUP PLC
		CENTRAL INDEX KEY:			0001274173
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			Y9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		201 BISHOPSGATE
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC2M 3AE
		BUSINESS PHONE:		442078181818

	MAIL ADDRESS:	
		STREET 1:		201 BISHOPSGATE
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC2M 3AE

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HENDERSON GROUP PLC
		DATE OF NAME CHANGE:	20050511

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HHG PLC
		DATE OF NAME CHANGE:	20031223
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>irwd2102020.txt
<DESCRIPTION>JANUS HENDERSON GROUP PLC OWNS 5.3% OF IRONWOOD
<TEXT>
Document 1 - file: irwd2102020.txt

</DOCUMENT>
</SEC-DOCUMENT>