Ironwood Pharmaceuticals Inc (IRWD)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	25,980,308	$297,214,723	0%
2.	Vanguard Group Inc	16,033,545	$183,423,755	0%
3.	State Street Corp	11,532,088	$131,927,087	0%
4.	Credit Suisse Ag	5,612,113	$64,202,573	0.06%
5.	Capstone Investment Advisors, LlcBOND	47,700,000	$50,204,252	0.15%