AI Holders Summary · Q1 2026

171 institutions reported MAX in Q1 2026. WHITE MOUNTAINS INSURANCE GROUP LTD leads at 45.9% 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

WHITE MOUNTAINS INSURANCE GROUP LTD

CIK 0000776867

$166M17.9M52.99%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$32M3.5M0.00%Q1 2026 03

J. Goldman & Co LP

CIK 0001412741

$17M1.9M0.51%Q1 2026 04

Clearline Capital LP

CIK 0001600136

$17M1.3M0.83%Q4 2025 05

JPMORGAN CHASE & CO

CIK 0000019617

$16M1.7M0.00%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$13M1.4M0.00%Q1 2026 07

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$10M1.1M0.00%Q1 2026 08

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$10M1.1M0.01%Q1 2026 09

JACOBS ASSET MANAGEMENT, LLC

CIK 0001351063

$9M924K5.15%Q1 2026 10

ACADIAN ASSET MANAGEMENT LLC

CIK 0000916542

$8M847K0.01%Q1 2026 11

STATE STREET CORP

CIK 0000093751

$8M838K0.00%Q1 2026 12

Shay Capital LLC

CIK 0001723643

$7M775K0.60%Q1 2026 13

JACOBS LEVY EQUITY MANAGEMENT, INC

CIK 0000884414

$7M750K0.03%Q1 2026 14

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$7M719K0.01%Q1 2026 15

MORGAN STANLEY

CIK 0000895421

$7M703K0.00%Q1 2026 16

Nuveen, LLC

CIK 0001871926

$7M701K0.00%Q1 2026 17

GOLDMAN SACHS GROUP INC

CIK 0000886982

$6M623K0.00%Q1 2026 18

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$6M621K0.00%Q1 2026 19

D. E. Shaw & Co., Inc.

CIK 0001009207

$5M397K0.00%Q4 2025 20

Vanguard Portfolio Management

CIK 0002100121· Index

$5M547K0.00%Q1 2026

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