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.
Sign in or subscribeLargest 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, LLC (Investment Advisor) | 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 |
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.