Spok Holdings Inc (SPOK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	1,409,039	$21,811,924	0%
2.	Vanguard Group Inc	994,313	$15,391,966	0%
3.	Dimensional Fund Advisors Lp	736,997	$11,408,717	0%
4.	Hightower Advisors, Llc	640,170	$9,909,000	0.01%
5.	Foundry Partners, Llc	447,290	$6,924,049	0.41%