AI Holders Summary · Q1 2026

120 institutions reported ACTG in Q1 2026. Starboard Value LP leads at 75.5% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(4 on this page)

#HolderValueShares% port.Quarter

Starboard Value LP

CIK 0001517137

$294M61.1M6.43%Q1 2026 02

STATE STREET CORP

CIK 0000093751

$15M3.1M0.00%Q1 2026 03

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$14M2.9M0.00%Q1 2026 04

BlackRock, Inc.

CIK 0002012383

$12M2.4M0.00%Q1 2026 05

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$8M1.6M0.00%Q1 2026 06

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$7M1.4M0.01%Q1 2026 07

Krilogy Financial LLC

CIK 0001659047

$6M1.1M0.18%Q1 2026 08

Peapod Lane Capital LLC

CIK 0002050979

$5M1.1M4.31%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$4M858K0.00%Q1 2026 10

Pacific Ridge Capital Partners, LLC

CIK 0001591546

$4M817K0.85%Q1 2026 11

Formidable Asset Management, LLC

CIK 0001592613

$4M793K0.59%Q2 2026 12

BRIDGEWAY CAPITAL MANAGEMENT, LLC

CIK 0001107261

$3M604K0.06%Q1 2026 13

GOLDMAN SACHS GROUP INC

CIK 0000886982

$3M584K0.00%Q1 2026 14

AMERICAN CENTURY COMPANIES INC

CIK 0000748054

$2M511K0.00%Q1 2026 15

AEGIS FINANCIAL CORP

CIK 0001140753

$2M491K0.41%Q1 2026 16

Tidal Investments LLC

CIK 0001600064

$2M437K0.00%Q1 2026 17

Empowered Funds, LLC

CIK 0001592828

$2M340K0.01%Q1 2026 18

MORGAN STANLEY

CIK 0000895421

$1M277K0.00%Q1 2026 19

CITADEL ADVISORS LLC

CIK 0001423053

$1M354K0.00%Q4 2025 20

NORTHERN TRUST CORP

CIK 0000073124· Index

$1M270K0.00%Q1 2026

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