Ironwood Pharmaceuticals Inc (IRWD)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	15,958,196	$53,779,120	0%
2.	Ubs Group AgCALL	11,200,320	$37,745,078	0.01%
3.	Ubs Group Ag	510,543	$1,720,531	0%
4.	Range Financial Group Llc	426,095	$1,435,940	0.5%
5.	Robeco Institutional Asset Management B.v.	342,998	$1,155,903	0%