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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — MTRN
Institutional Holdings
Insider Transactions
US Institutional Ownership
88.9%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
3.37M
$487.0M
16.23%
+68.3K
2026-03-31
VANGUARD PORTFOLIO MANAGEMENT LLC
1.35M
$195.0M
6.50%
--
2026-03-31
STATE STREET CORP
1.33M
$192.0M
6.40%
+118.6K
2026-03-31
VANGUARD CAPITAL MANAGEMENT LLC
927.9K
$134.0M
4.47%
--
2026-03-31
DIMENSIONAL FUND ADVISORS LP
885.2K
$128.0M
4.26%
-105.5K
2026-03-31
AMERICAN CENTURY COMPANIES INC
882.7K
$127.0M
4.25%
+361.3K
2026-03-31
Capital Research Global Investors
789.9K
$114.0M
3.80%
-1.10M
2026-03-31
BARROW HANLEY MEWHINNEY & STRAUSS LLC
529.8K
$76.0M
2.55%
--
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
504.0K
$72.0M
2.43%
+14.4K
2026-03-31
ACK Asset Management LLC
474.8K
$68.0M
2.29%
--
2026-03-31
Fisher Asset Management, LLC
442.0K
$63.0M
2.13%
+301.7K
2026-03-31
MORGAN STANLEY
424.5K
$61.0M
2.04%
-5.0K
2026-03-31
Capital World Investors
415.0K
$60.0M
2.00%
--
2026-03-31
Trigran Investments, Inc.
334.0K
$48.0M
1.61%
-124.1K
2026-03-31
Harvey Partners, LLC
293.1K
$42.0M
1.41%
-26.4K
2026-03-31
RAYMOND JAMES FINANCIAL INC
292.6K
$40.0M
1.41%
+4.6K
2026-03-31
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
292.5K
$42.0M
1.41%
-11.1K
2026-03-31
Copeland Capital Management, LLC
265.2K
$38.0M
1.28%
-39.7K
2026-03-31
NORTHERN TRUST CORP
247.8K
$35.0M
1.19%
-1.6K
2026-03-31
Invesco Ltd.
179.2K
$25.0M
0.86%
+105.4K
2026-03-31
Aberdeen Group plc
164.4K
$23.0M
0.79%
-31.9K
2026-03-31
Bank of New York Mellon Corp
152.5K
$22.0M
0.73%
-4.5K
2026-03-31
Granahan Investment Management, LLC
144.5K
$20.0M
0.70%
+6.3K
2026-03-31
Nuveen, LLC
143.2K
$20.0M
0.69%
+74.3K
2026-03-31
VANGUARD FIDUCIARY TRUST CO
136.4K
$19.0M
0.66%
--
2026-03-31
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