MTRN Materion Corporation
Materion Corporation (MTRN) Institutional Ownership
What the institutions did with MTRN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 3.5M | 17.0% |
| STATE STREET CORP | 1.5M | 7.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.4M | 6.8% |
| Capital Research Global Investors | 1.0M | 4.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 937.6K | 4.6% |
| AMERICAN CENTURY COMPANIES INC | 616.0K | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 591.0K | 2.9% |
| DIMENSIONAL FUND ADVISORS LP | 578.0K | 2.8% |
| Fisher Asset Management, LLC | 495.2K | 2.4% |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 446.1K | 2.2% |
| MORGAN STANLEY | 411.1K | 2.0% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 329.3K | 1.6% |
| SEGALL BRYANT & HAMILL, LLC | 314.0K | 1.5% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 281.7K | 1.4% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 271.0K | 1.3% |
| NORTHERN TRUST CORP | 264.7K | 1.3% |
| RAYMOND JAMES FINANCIAL INC | 245.4K | 1.2% |
| First Eagle Investment Management, LLC | 238.6K | 1.2% |
| GOLDMAN SACHS GROUP INC | 235.8K | 1.2% |
| Nuveen, LLC | 228.6K | 1.1% |
| Copeland Capital Management, LLC | 227.7K | 1.1% |
| Harvey Partners, LLC | 220.1K | 1.1% |
| Trigran Investments, Inc. | 219.9K | 1.1% |
| Invesco Ltd. | 200.1K | 1.0% |
| GAMCO INVESTORS, INC. ET AL | 180.9K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Capital World Investors | Sold Out | 415.0K | 0 | -415.0K |
| ACK Asset Management LLC | Reduced | 474.8K | 135.0K | -339.8K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 885.2K | 578.0K | -307.2K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 24.4K | 329.3K | +304.9K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 882.7K | 616.0K | -266.7K |
| Capital Research Global Investors | Increased | 789.9K | 1.0M | +210.6K |
| WELLINGTON MANAGEMENT GROUP LLP | New | 0 | 158.3K | +158.3K |
| SAMLYN CAPITAL, LLC | New | 0 | 151.7K | +151.7K |
| T. Rowe Price Investment Management, Inc. | New | 0 | 136.9K | +136.9K |
| First Eagle Investment Management, LLC | Increased | 102.0K | 238.6K | +136.7K |
| STATE STREET CORP | Increased | 1.3M | 1.5M | +128.0K |
| GOLDMAN SACHS GROUP INC | Increased | 116.8K | 235.8K | +119.0K |
| Trigran Investments, Inc. | Reduced | 334.0K | 219.9K | -114.1K |
| BlackRock, Inc. | Increased | 3.4M | 3.5M | +104.6K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Increased | 14.7K | 115.8K | +101.1K |
| MACKENZIE FINANCIAL CORP | Increased | 6.1K | 104.0K | +97.9K |
| Ceredex Value Advisors LLC | Sold Out | 97.5K | 0 | -97.5K |
| EMERALD ADVISERS, LLC | New | 0 | 92.8K | +92.8K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 504.0K | 591.0K | +87.0K |
| Nuveen, LLC | Increased | 143.2K | 228.6K | +85.4K |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Reduced | 529.8K | 446.1K | -83.8K |
| Aberdeen Group plc | Reduced | 164.4K | 83.6K | -80.8K |
| JPMORGAN CHASE & CO | Reduced | 183.4K | 108.2K | -75.3K |
| Granahan Investment Management, LLC | Reduced | 144.5K | 69.8K | -74.7K |
| Harvey Partners, LLC | Reduced | 293.1K | 220.1K | -73.1K |
| AGF MANAGEMENT LTD | New | 0 | 68.1K | +68.1K |
| Qube Research & Technologies Ltd | Sold Out | 65.5K | 0 | -65.5K |
| ROYAL BANK OF CANADA | Reduced | 219.1K | 154.4K | -64.7K |
| FMR LLC | Increased | 12.5K | 75.7K | +63.2K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 85.2K | 147.8K | +62.6K |
| Raiffeisen Bank International AG | New | 0 | 62.1K | +62.1K |
| EMERALD MUTUAL FUND ADVISERS TRUST | New | 0 | 61.2K | +61.2K |
| BANK OF AMERICA CORP /DE/ | Increased | 118.6K | 173.1K | +54.5K |
| Fisher Asset Management, LLC | Increased | 442.0K | 495.2K | +53.2K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 292.6K | 245.4K | -47.2K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.3M | 1.4M | +46.6K |
| HAWK RIDGE CAPITAL MANAGEMENT LP | New | 0 | 45.8K | +45.8K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 4.2K | 49.1K | +45.0K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 42.1K | 85.8K | +43.6K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Reduced | 131.7K | 88.3K | -43.5K |
| Thrivent Financial for Lutherans | Increased | 13.8K | 57.1K | +43.3K |
| SailingStone Capital Partners LLC | Sold Out | 42.3K | 0 | -42.3K |
| Copeland Capital Management, LLC | Reduced | 265.2K | 227.7K | -37.6K |
| JANE STREET GROUP, LLC | Increased | 23.9K | 54.2K | +30.3K |
| Blackstone Inc. | Reduced | 31.0K | 783 | -30.3K |
| Mawer Investment Management Ltd. | New | 0 | 26.9K | +26.9K |
| CITADEL ADVISORS LLC | Increased | 38.1K | 64.8K | +26.7K |
| Allianz Asset Management GmbH | New | 0 | 26.5K | +26.5K |
| HighTower Advisors, LLC | Reduced | 65.3K | 39.0K | -26.3K |
| HRT FINANCIAL LP | New | 0 | 25.9K | +25.9K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 44.9K | 69.8K | +24.9K |
| KING LUTHER CAPITAL MANAGEMENT CORP | Reduced | 78.1K | 53.5K | -24.7K |
| Informed Momentum Co LLC | New | 0 | 24.3K | +24.3K |
| Fiera Capital Corp | Reduced | 58.6K | 34.4K | -24.2K |
| ROYCE & ASSOCIATES LP | Reduced | 103.5K | 79.5K | -24.0K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 292.5K | 271.0K | -21.6K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Increased | 260.5K | 281.7K | +21.2K |
| Arosa Capital Management LP | Reduced | 25.0K | 4.0K | -21.0K |
| Invesco Ltd. | Increased | 179.2K | 200.1K | +20.9K |
| Portolan Capital Management, LLC | New | 0 | 20.9K | +20.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.