Repligen Corp (RGEN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	6,815,687	$867,228,009	0.02%
2.	Vanguard Group Inc	5,079,894	$646,365,712	0.01%
3.	State Street Corp	1,688,937	$214,900,344	0.01%
4.	Invesco Ltd.	1,674,477	$213,060,410	0.04%
5.	Champlain Investment Partners, Llc	1,463,995	$186,278,724	1.35%