Spok Holdings, Inc (SPOK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

21,353,333Shares Outstanding

256,591Shares held by institutions

$3,522,994Value of institutional holdings

51.94%Institutional ownership %

2.82%Shares Changed QoQ

126No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 126 institutional investors hold a position in Spok Holdings, Inc (NASDAQ:SPOK).

The percentage of Spok Holdings owned by institutions changed from 53.7% in September 2025 to 51.9% in December 2025, marking a slight down trend.
Quarterly data indicates a 2.82% shift in institutional share volume, and the annual owner count reflects an increase of 8.62%.
Of these 126 institutional investors, 59 increased their holdings in Spok Holdings, while 51 of them reduced positions, and 16 investors maintained their exposure.
This class of investors increased its holdings in Spok Holdings to 11.09Mn shares for the 13F-cycle ending December 2025, up by 303.79K shares quarter on quarter, and up 987.93K shares year over year.
The top institutional stake in Spok Holdings as of December 31, 2025 belongs to BlackRock, Inc., which owns 1.80Mn shares, or 8.43% of the company.
Among the most significant buyers of Spok Holdings during December 2025 were Uniplan Investment Counsel, Inc. (153.58K), FMR LLC (107.15K), MILLENNIUM MANAGEMENT LLC (97.52K), Quantinno Capital Management LP (81.94K), Trexquant Investment LP (81.78K).
Leading sellers of Spok Holdings stock in December 2025 included BlackRock, Inc. (135.71K), TWO SIGMA INVESTMENTS, LP (106.64K), ACADIAN ASSET MANAGEMENT LLC (106.02K), CSM Advisors, LLC (71.40K), Connor, Clark & Lunn Investment Management Ltd. (61.42K).
The top 10 institutional holders of Spok Holdings for the quarter ending December 2025 included BlackRock, Inc. (1.80Mn), RENAISSANCE TECHNOLOGIES LLC (1.25Mn), VANGUARD GROUP INC (1.23Mn), DIMENSIONAL FUND ADVISORS LP (703.83K), GEODE CAPITAL MANAGEMENT, LLC (598.55K), STATE STREET CORP (446.92K), HighTower Advisors, LLC (382.38K), GOLDMAN SACHS GROUP INC (362.47K), ACADIAN ASSET MANAGEMENT LLC (322.04K), Uniplan Investment Counsel, Inc. (314.82K).

126 Institutional Holders

256,591 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	1,799,549	-135,713	-7.01%	$23,736,052.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	1,246,579	74,029	6.31%	$16,442,377.00
VANGUARD GROUP INC	31 Dec, 2025	1,229,078	74,447	6.45%	$16,211,540.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	703,826	-15,224	-2.12%	$9,283,621.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	598,552	-2,674	-0.44%	$7,896,462.00
STATE STREET CORP	31 Dec, 2025	446,919	-10,509	-2.30%	$5,894,862.00
HighTower Advisors, LLC	31 Dec, 2025	382,375	-25,636	-6.28%	$5,043,527.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	362,471	-33,429	-8.44%	$4,780,997.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	322,043	-106,017	-24.77%	$4,246.00
Uniplan Investment Counsel, Inc.	31 Dec, 2025	314,821	153,579	95.25%	$4,152,499.00
CSM Advisors, LLC	31 Dec, 2025	262,945	-71,400	-21.36%	$3,471.00
NORTHERN TRUST CORP	31 Dec, 2025	217,094	-23,892	-9.91%	$2,863,470.00
Bank of New York Mellon Corp	31 Dec, 2025	212,816	16,905	8.63%	$2,807,039.00
Connor, Clark & Lunn Investment Management Ltd.	31 Dec, 2025	196,865	-61,419	-23.78%	$2,596,649.00
Qube Research & Technologies Ltd	31 Dec, 2025	178,092	16,117	9.95%	$2,349,033.00
MORGAN STANLEY	31 Dec, 2025	177,693	33,630	23.34%	$2,343,791.00
Trexquant Investment LP	31 Dec, 2025	170,653	81,784	92.03%	$2,250,913.00
FMR LLC	31 Dec, 2025	126,982	107,153	540.39%	$1,674,888.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	125,808	97,515	344.66%	$1,659,408.00
North Star Investment Management Corp.	31 Dec, 2025	122,000	0	0.00%	$1,609,180.00

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