Who owns Martin Marietta Materials (MLM)?
384 US mutual funds and ETFs from 179 fund families reported a position in MLM for the quarter ending 2026-06-30. Against their own report a quarter earlier, 112 raised shares, 13 opened a new position, 173 cut and 19 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Vanguard Index Funds | 7 | 40.6% |
| Ishares Trust | 15 | 11.5% |
| Fidelity Magellan Fund | 2 | 5.4% |
| Victory Portfolios Iv | 1 | 4.8% |
| Select Sector Spdr Trust | 1 | 4.3% |
| T. Rowe Price Mid-Cap Growth Fund, Inc. | 1 | 2.5% |
Tracked managers holding MLM
| Investor | Book weight |
|---|---|
| Tom Russo · Gardner Russo & Quinn | 4.6% |
| Chris Hohn · TCI | 1.4% |
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about MLM. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
Our model ranks every tracked manager’s likely next buys from 13F filings. Request the dataset sample with a work email.
The predicted next buys, fresh disclosures, and the week’s catalysts. One email a week. Honest numbers, never advice.