MLM Martin Marietta Materials, Inc.
Martin Marietta Materials, Inc. (MLM) Institutional Ownership
What the institutions did with MLM 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. | 4.7M | 7.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9M | 6.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.2M | 5.4% |
| STATE STREET CORP | 3.2M | 5.3% |
| BANK OF AMERICA CORP /DE/ | 2.4M | 4.1% |
| FMR LLC | 2.2M | 3.7% |
| PRINCIPAL FINANCIAL GROUP INC | 2.1M | 3.6% |
| Aristotle Capital Management, LLC | 1.8M | 3.1% |
| VICTORY CAPITAL MANAGEMENT INC | 1.8M | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6M | 2.7% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.6M | 2.7% |
| JPMORGAN CHASE & CO | 1.5M | 2.5% |
| TCI FUND MANAGEMENT LTD | 1.3M | 2.2% |
| GOLDMAN SACHS GROUP INC | 1.2M | 2.0% |
| MORGAN STANLEY | 1.0M | 1.7% |
| Select Equity Group, L.P. | 1.0M | 1.7% |
| BAILLIE GIFFORD & CO | 991.8K | 1.7% |
| GARDNER RUSSO & QUINN LLC | 705.4K | 1.2% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 653.2K | 1.1% |
| Invesco Ltd. | 649.6K | 1.1% |
| T. Rowe Price Investment Management, Inc. | 641.3K | 1.1% |
| ALKEON CAPITAL MANAGEMENT LLC | 627.4K | 1.1% |
| DIMENSIONAL FUND ADVISORS LP | 586.1K | 1.0% |
| NORTHERN TRUST CORP | 570.3K | 1.0% |
| NORGES BANK | 557.1K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| TCI FUND MANAGEMENT LTD | New | 0 | 1.3M | +1.3M |
| FMR LLC | Reduced | 2.6M | 2.2M | -415.4K |
| JPMORGAN CHASE & CO | Reduced | 1.9M | 1.5M | -393.3K |
| MORGAN STANLEY | Reduced | 1.3M | 1.0M | -329.6K |
| T. Rowe Price Investment Management, Inc. | Reduced | 952.4K | 641.3K | -311.1K |
| STATE STREET CORP | Increased | 2.9M | 3.2M | +282.1K |
| GOLDMAN SACHS GROUP INC | Increased | 885.9K | 1.2M | +277.5K |
| 59 North Capital Management, LP | New | 0 | 214.1K | +214.1K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 238.0K | 61.0K | -177.0K |
| Rathbones Group PLC | Reduced | 326.0K | 160.4K | -165.6K |
| VICTORY CAPITAL MANAGEMENT INC | Increased | 1.6M | 1.8M | +146.3K |
| Freestone Grove Partners LP | New | 0 | 124.3K | +124.3K |
| Junto Capital Management LP | New | 0 | 123.5K | +123.5K |
| Aristotle Capital Management, LLC | Reduced | 2.0M | 1.8M | -123.5K |
| ALKEON CAPITAL MANAGEMENT LLC | Reduced | 747.4K | 627.4K | -120.0K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.5M | 1.6M | +110.5K |
| BAILLIE GIFFORD & CO | Reduced | 1.1M | 991.8K | -95.6K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Reduced | 272.4K | 181.9K | -90.5K |
| CIBC Bancorp USA Inc. | Reduced | 474.5K | 390.7K | -83.9K |
| HAWK RIDGE CAPITAL MANAGEMENT LP | Increased | 160.5K | 238.7K | +78.1K |
| DIAMOND HILL CAPITAL MANAGEMENT INC | Reduced | 289.2K | 213.9K | -75.2K |
| Interval Partners, LP | Reduced | 94.2K | 23.7K | -70.5K |
| FRANKLIN RESOURCES INC | Reduced | 528.2K | 459.3K | -68.9K |
| RDST Capital LLC | Increased | 95.1K | 163.6K | +68.5K |
| Bornite Capital Management LP | New | 0 | 65.2K | +65.2K |
| Woodline Partners LP | Reduced | 70.9K | 13.1K | -57.8K |
| NATIXIS ADVISORS, LLC | Reduced | 101.5K | 50.3K | -51.2K |
| JONES FINANCIAL COMPANIES LLLP | Reduced | 84.6K | 34.3K | -50.3K |
| BANK OF AMERICA CORP /DE/ | Increased | 2.4M | 2.4M | +47.0K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 339.8K | 386.0K | +46.2K |
| TCW GROUP INC | Reduced | 47.7K | 2.0K | -45.8K |
| Pictet Asset Management Holding SA | Increased | 37.3K | 82.1K | +44.9K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | 91.5K | 46.8K | -44.7K |
| BARCLAYS PLC | Reduced | 146.1K | 101.9K | -44.3K |
| AMERIPRISE FINANCIAL INC | Reduced | 107.6K | 64.3K | -43.2K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 94.2K | 51.4K | -42.8K |
| Invesco Ltd. | Reduced | 690.9K | 649.6K | -41.3K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 546.2K | 586.1K | +40.0K |
| MILLENNIUM MANAGEMENT LLC | Increased | 14.9K | 54.1K | +39.3K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Increased | 448.0K | 486.1K | +38.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.2M | 3.2M | +37.0K |
| UBS Group AG | Increased | 354.2K | 390.4K | +36.3K |
| EVENTIDE ASSET MANAGEMENT, LLC | Increased | 2.9K | 37.4K | +34.5K |
| Assenagon Asset Management S.A. | Increased | 23.5K | 57.7K | +34.2K |
| California Public Employees Retirement System | Reduced | 111.8K | 79.0K | -32.7K |
| JENNISON ASSOCIATES LLC | Sold Out | 32.3K | 0 | -32.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 460.5K | 492.5K | +32.0K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 31.9K | +31.9K |
| One Madison Group LLC | Reduced | 91.0K | 60.0K | -31.0K |
| Coalescence Partners Investment Management, LP | Sold Out | 30.7K | 0 | -30.7K |
| Cinctive Capital Management LP | New | 0 | 30.0K | +30.0K |
| FRED ALGER MANAGEMENT, LLC | Reduced | 52.3K | 22.5K | -29.8K |
| Cannell & Spears LLC | Reduced | 81.3K | 52.2K | -29.1K |
| Fourth Sail Capital LP | New | 0 | 27.0K | +27.0K |
| Drummond Knight Asset Management Pty Ltd | Sold Out | 26.2K | 0 | -26.2K |
| SUVRETTA CAPITAL MANAGEMENT, LLC | New | 0 | 26.0K | +26.0K |
| Diversified Trust Co | Increased | 5.7K | 31.7K | +26.0K |
| Susquehanna Portfolio Strategies, LLC | Reduced | 46.0K | 20.1K | -25.9K |
| Bank of New York Mellon Corp | Reduced | 371.0K | 345.6K | -25.3K |
| OSAIC HOLDINGS, INC. | Reduced | 62.0K | 37.5K | -24.5K |
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.