AI Holders Summary · Q1 2026

142 institutions reported SPOK in Q1 2026. BlackRock, Inc. leads at 19.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

Hide index funds / market makers / custodians(6 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$18M1.7M0.00%Q1 2026 02

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$14M1.3M0.02%Q1 2026 03

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$9M860K0.00%Q1 2026 04

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$8M716K0.00%Q1 2026 05

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$6M546K0.00%Q1 2026 06

Foundry Partners, LLC

CIK 0001573913

$6M360K0.31%Q1 2025 07

STATE STREET CORP

CIK 0000093751

$5M462K0.00%Q1 2026 08

HighTower Advisors, LLC

CIK 0001462245

$4M382K0.00%Q1 2026 09

Vanguard Portfolio Management

CIK 0002100121· Index

$3M265K0.00%Q1 2026 10

GOLDMAN SACHS GROUP INC

CIK 0000886982

$2M220K0.00%Q1 2026 11

Bank of New York Mellon Corp

CIK 0001390777

$2M218K0.00%Q1 2026 12

NORTHERN TRUST CORP

CIK 0000073124· Index

$2M217K0.00%Q1 2026 13

CSM Advisors, LLC

CIK 0001863523

$2M213K0.06%Q1 2026 14

Uniplan Investment Counsel, Inc.

CIK 0001520710

$2M210K0.23%Q1 2026 15

Qube Research & Technologies Ltd

CIK 0001729829

$2M172K0.00%Q1 2026 16

MORGAN STANLEY

CIK 0000895421

$2M160K0.00%Q1 2026 17

Connor, Clark & Lunn Investment Management Ltd.

CIK 0001596800

$2M145K0.00%Q1 2026 18

VANGUARD FIDUCIARY TRUST CO

CIK 0000933478· Index

$1M129K0.00%Q1 2026 19

Trexquant Investment LP

CIK 0001633445

$1M129K0.01%Q1 2026 20

North Star Investment Management Corp.

CIK 0001342857

$1M122K0.08%Q1 2026

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