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 September 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 |
|---|---|---|
| PRINCIPAL FINANCIAL GROUP INC | 2.4M | 15.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6M | 10.6% |
| VICTORY CAPITAL MANAGEMENT INC | 1.2M | 8.1% |
| FMR LLC | 1.2M | 7.6% |
| BAILLIE GIFFORD & CO | 911.1K | 6.0% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 624.9K | 4.1% |
| DIMENSIONAL FUND ADVISORS LP | 568.4K | 3.7% |
| UBS Group AG | 514.7K | 3.4% |
| Bank of New York Mellon Corp | 336.5K | 2.2% |
| DAVENPORT & Co LLC | 328.0K | 2.2% |
| Amundi | 241.4K | 1.6% |
| GREAT LAKES ADVISORS, LLC | 228.3K | 1.5% |
| DEUTSCHE BANK AG\ | 228.1K | 1.5% |
| Mawer Investment Management Ltd. | 208.0K | 1.4% |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 196.4K | 1.3% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 156.0K | 1.0% |
| MCDONALD CAPITAL INVESTORS INC/CA | 155.0K | 1.0% |
| Nuveen, LLC | 140.5K | 0.9% |
| BARCLAYS PLC | 140.2K | 0.9% |
| STEGINSKY CAPITAL LLC | 135.0K | 0.9% |
| SEI INVESTMENTS CO | 130.8K | 0.9% |
| Sumitomo Mitsui Trust Group, Inc. | 124.7K | 0.8% |
| RHUMBLINE ADVISERS | 112.5K | 0.7% |
| Pictet Asset Management Holding SA | 102.6K | 0.7% |
| Fenimore Asset Management Inc | 89.4K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Reduced | 2.2M | 1.2M | -1.0M |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 1.8M | 1.2M | -550.9K |
| PRINCIPAL FINANCIAL GROUP INC | Increased | 2.1M | 2.4M | +269.5K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Sold Out | 181.9K | 0 | -181.9K |
| DekaBank Deutsche Girozentrale | Reduced | 177.5K | 20.0K | -157.5K |
| UBS Group AG | Increased | 390.4K | 514.7K | +124.3K |
| BAILLIE GIFFORD & CO | Reduced | 991.8K | 911.1K | -80.6K |
| Bornite Capital Management LP | Sold Out | 65.2K | 0 | -65.2K |
| Public Sector Pension Investment Board | Increased | 9.7K | 63.1K | +53.3K |
| Squarepoint Ops LLC | Increased | 2.9K | 50.5K | +47.7K |
| Assenagon Asset Management S.A. | Reduced | 57.7K | 17.2K | -40.4K |
| Waratah Capital Advisors Ltd. | Sold Out | 40.1K | 0 | -40.1K |
| BARCLAYS PLC | Increased | 101.9K | 140.2K | +38.3K |
| Fisher Funds Management LTD | Increased | 31.6K | 69.3K | +37.6K |
| Ceredex Value Advisors LLC | New | 0 | 35.2K | +35.2K |
| Russell Investments Group, Ltd. | Reduced | 83.3K | 48.3K | -34.9K |
| VOYA INVESTMENT MANAGEMENT LLC | Increased | 20.5K | 54.7K | +34.2K |
| Mawer Investment Management Ltd. | Reduced | 241.5K | 208.0K | -33.6K |
| Nuveen, LLC | Reduced | 173.4K | 140.5K | -32.9K |
| FRANKLIN STREET ADVISORS INC /NC | Reduced | 30.0K | 627 | -29.4K |
| KING LUTHER CAPITAL MANAGEMENT CORP | Reduced | 653.2K | 624.9K | -28.2K |
| One Way Holdings LLC | Reduced | 27.3K | 489 | -26.8K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 61.0K | 34.9K | -26.1K |
| ASSETMARK, INC | Reduced | 26.4K | 1.5K | -24.8K |
| Amundi | Reduced | 263.5K | 241.4K | -22.1K |
| Pictet Asset Management Holding SA | Increased | 82.1K | 102.6K | +20.4K |
| PFA Pension, Forsikringsaktieselskab | Sold Out | 19.9K | 0 | -19.9K |
| Savant Capital, LLC | Increased | 22.1K | 41.4K | +19.3K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 586.1K | 568.4K | -17.7K |
| Coronation Fund Managers Ltd. | New | 0 | 17.6K | +17.6K |
| Diamond Hill Capital Management, LLC (Investment Advisor) | Reduced | 213.9K | 196.4K | -17.5K |
| Turtle Creek Wealth Advisors, LLC | Reduced | 16.5K | 443 | -16.1K |
| MCDONALD CAPITAL INVESTORS INC/CA | Increased | 139.0K | 155.0K | +16.0K |
| Thrivent Financial for Lutherans | Reduced | 18.1K | 2.4K | -15.7K |
| Eurizon Capital SGR S.p.A. | Reduced | 23.5K | 8.8K | -14.7K |
| OFI INVEST ASSET MANAGEMENT | Increased | 42.7K | 57.1K | +14.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.6M | 1.6M | +13.9K |
| TimesSquare Capital Management, LLC | Increased | 73.3K | 86.7K | +13.4K |
| USS Investment Management Ltd | Increased | 19.8K | 32.6K | +12.8K |
| Douglas Lane & Associates, LLC | Increased | 43.7K | 55.8K | +12.1K |
| AMF Tjanstepension AB | New | 0 | 11.3K | +11.3K |
| Rakuten Investment Management, Inc. | New | 0 | 10.8K | +10.8K |
| AIA Group Ltd | New | 0 | 10.2K | +10.2K |
| STOREBRAND ASSET MANAGEMENT AS | Reduced | 17.0K | 7.3K | -9.7K |
| Y-Intercept (Hong Kong) Ltd | Increased | 1.3K | 10.8K | +9.5K |
| MAGNOLIA GROUP, LLC | New | 0 | 9.2K | +9.2K |
| Covea Finance | Reduced | 23.3K | 14.1K | -9.2K |
| Bank of New York Mellon Corp | Reduced | 345.6K | 336.5K | -9.1K |
| DAVENPORT & Co LLC | Reduced | 336.8K | 328.0K | -8.8K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Increased | 147.4K | 156.0K | +8.6K |
| Williams Jones Wealth Management, LLC. | Increased | 21.7K | 29.8K | +8.1K |
| Renaissance Investment Group LLC | Reduced | 9.4K | 1.7K | -7.6K |
| BANK OF MONTREAL /CAN/ | Reduced | 43.3K | 35.7K | -7.6K |
| HANTZ FINANCIAL SERVICES, INC. | Increased | 2.3K | 9.8K | +7.5K |
| BANQUE PICTET & CIE SA | New | 0 | 7.5K | +7.5K |
| OpenArc Corporate Advisory, LLC | Reduced | 8.5K | 1.6K | -6.8K |
| MITCHELL CAPITAL MANAGEMENT CO | Sold Out | 6.6K | 0 | -6.6K |
| IMC-Chicago, LLC | Reduced | 11.8K | 5.3K | -6.5K |
| FIL Ltd | Reduced | 7.0K | 526 | -6.5K |
| Myriad Asset Management Advisors LLC | Sold Out | 6.3K | 0 | -6.3K |
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.