Cogent Communications Holdings Inc. (CCOI)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	7,336,041	$557,979,246	0.01%
2.	Vanguard Group Inc	5,081,633	$386,509,007	0%
3.	State Street Corp	1,814,628	$138,020,606	0%
4.	Brown Advisory Inc	1,339,159	$101,856,447	0.14%
5.	Geode Capital Management, Llc	964,504	$73,368,357	0%