AI Holders Summary · Q1 2026

359 institutions reported MTRN in Q1 2026. BlackRock, Inc. leads at 23.5% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(5 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$487M3.4M0.01%Q1 2026 02

Vanguard Portfolio Management

CIK 0002100121· Index

$195M1.3M0.01%Q1 2026 03

STATE STREET CORP

CIK 0000093751

$192M1.3M0.01%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$134M928K0.00%Q1 2026 05

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$128M885K0.03%Q1 2026 06

AMERICAN CENTURY COMPANIES INC

CIK 0000748054

$128M883K0.07%Q1 2026 07

Capital Research Global Investors

CIK 0001422848

$114M790K0.02%Q1 2026 08

BARROW HANLEY MEWHINNEY & STRAUSS LLC

CIK 0000313028

$77M530K0.25%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$73M504K0.00%Q1 2026 10

ACK Asset Management LLC

CIK 0001510940

$69M475K8.57%Q1 2026 11

Fisher Asset Management, LLC

CIK 0000850529

$64M442K0.02%Q1 2026 12

MORGAN STANLEY

CIK 0000895421

$61M424K0.00%Q1 2026 13

Capital World Investors

CIK 0001422849

$60M415K0.01%Q1 2026 14

SEGALL BRYANT & HAMILL, LLC

CIK 0001006378

$48M334K0.69%Q1 2026 15

Trigran Investments, Inc.

CIK 0001336800

$48M334K11.55%Q1 2026 16

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$42M293K0.01%Q1 2026 17

RAYMOND JAMES FINANCIAL INC

CIK 0000720005

$41M293K0.01%Q1 2026 18

Harvey Partners, LLC

CIK 0001406484

$40M320K3.52%Q4 2025 19

Copeland Capital Management, LLC

CIK 0001541743

$38M305K0.85%Q4 2025 20

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

CIK 0001705339

$38M261K0.05%Q1 2026

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