Cogent Communications Holdings Inc. (CCOI)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	6,606,661	$405,054,366	0.01%
2.	Brown Advisory Inc	1,671,470	$102,477,878	0.15%
3.	Bank Of New York Mellon Corp	524,472	$32,155,385	0.01%
4.	Jennison Associates Llc	299,016	$18,332,670	0.01%
5.	Emerald Advisers Inc	232,272	$14,240,596	0.64%