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Osi Systems Inc (OSIS)

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Institutional Investors' Holdings

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No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	2,559,330	$497,380,191	0.01%
2.	Vanguard Group Inc	2,113,028	$410,645,861	0.01%
3.	Mawer Investment Management Ltd.	461,022	$89,595,015	0.43%
4.	Primecap Management Co	334,330	$64,973,692	0.05%
5.	Brown Advisory Inc	278,790	$54,180,048	0.08%