American Water Works Company Inc. (AWK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	20,612,348	$2,712,172,711	0.04%
2.	Wellington Management Group Llp	14,911,963	$1,962,116,092	0.34%
3.	Vanguard Capital Management Llc	12,772,580	$1,680,616,076	0.04%
4.	State Street Corp	11,901,865	$1,566,047,397	0.05%
5.	Vanguard Portfolio Management Llc	11,256,567	$1,481,139,086	0.07%