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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — SPOK
Institutional Holdings
Insider Transactions
US Institutional Ownership
52.1%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
1.72M
$17.0M
8.22%
+43.0K
2026-06-30
RENAISSANCE TECHNOLOGIES LLC
1.15M
$11.0M
5.49%
-113.0K
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
872.4K
$8.0M
4.17%
+12.8K
2026-06-30
DIMENSIONAL FUND ADVISORS LP
717.6K
$7.0M
3.43%
+1.7K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
595.8K
$6.0M
2.85%
+50.1K
2026-06-30
STATE STREET CORP
471.6K
$4.0M
2.26%
+9.8K
2026-06-30
HighTower Advisors, LLC
339.9K
$3.0M
1.63%
-41.9K
2026-06-30
Qube Research & Technologies Ltd
287.6K
$2.0M
1.38%
+115.6K
2026-06-30
GOLDMAN SACHS GROUP INC
282.0K
$2.0M
1.35%
+62.4K
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
273.3K
$2.0M
1.31%
+8.3K
2026-06-30
Bank of New York Mellon Corp
234.1K
$2.0M
1.12%
+16.3K
2026-06-30
NORTHERN TRUST CORP
222.9K
$2.0M
1.07%
+6.4K
2026-06-30
Uniplan Investment Counsel, Inc.
215.8K
$2.0M
1.03%
+6.2K
2026-06-30
CSM Advisors, LLC
212.9K
$2.0M
1.02%
-220
2026-06-30
UNITED CAPITAL FINANCIAL ADVISORS, LLC
194.8K
$1.0M
0.93%
+90.1K
2026-06-30
CITADEL ADVISORS LLC
183.4K
$1.0M
0.88%
+165.7K
2026-06-30
MORGAN STANLEY
166.6K
$1.0M
0.80%
+6.7K
2026-06-30
JACOBS LEVY EQUITY MANAGEMENT, INC
160.3K
$1.0M
0.77%
+43.5K
2026-06-30
GSA CAPITAL PARTNERS LLP
150.1K
$1.0M
0.72%
+64.3K
2026-06-30
VANGUARD FIDUCIARY TRUST CO
136.9K
$1.0M
0.65%
+7.7K
2026-06-30
D. E. Shaw & Co., Inc.
130.2K
$1.0M
0.62%
+40.7K
2026-06-30
Connor, Clark & Lunn Investment Management Ltd.
107.5K
$1.0M
0.51%
-37.4K
2026-06-30
PANAGORA ASSET MANAGEMENT INC
93.0K
--
0.44%
+14.7K
2026-06-30
North Star Investment Management Corp.
90.0K
--
0.43%
-32.0K
2026-06-30
FMR LLC
89.2K
--
0.43%
+74.1K
2026-06-30
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