Spok Holdings Inc (SPOK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	1,382,119	$22,183,010	0%
2.	Vanguard Group Inc	1,048,161	$16,822,984	0%
3.	Dimensional Fund Advisors Lp	707,848	$11,360,922	0%
4.	Hightower Advisors, Llc	666,713	$10,700,744	0.01%
5.	Geode Capital Management, Llc	514,427	$8,257,999	0%