American Water Works Company Inc. (AWK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	19,513,998	$2,655,659,907	0.05%
2.	Vanguard Capital Management Llc	12,699,771	$1,728,311,835	0.04%
3.	State Street Corp	12,038,747	$1,638,353,079	0.06%
4.	Vanguard Portfolio Management Llc	11,301,554	$1,538,028,484	0.08%
5.	Wellington Management Group Llp	11,028,906	$1,500,923,818	0.28%