Alkermes Plc. (ALKS)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	28,272,412	$791,062,090	0.01%
2.	Vanguard Group Inc	18,007,364	$503,846,044	0.01%
3.	State Street Corp	9,472,858	$265,050,567	0.01%
4.	American Century Companies Inc	5,956,824	$166,671,997	0.08%
5.	Jpmorgan Chase & Co	5,184,547	$145,063,637	0.01%