Public filings / MLM on Yahoo Finance (opens in a new tab)
MLM: insider buying, 13F holders, analyst moves
Martin Marietta Matls Inc
A summary of public filings about Martin Marietta Matls Inc. For the latest insider history, price chart, analyst changes and activist filings, open the live lookup.
SEC Form 13F · Q2 2026
6 of our 100 managers hold MLM
Combined reported value $1.75B; 1 sold out since Q1 2026.
Holders among our 100 managers: 4 in Q3 2023, 6 in Q2 2026.
| Manager | Value | % of portfolio | Change vs Q1 2026 |
|---|---|---|---|
| TCI Fund Management | $758.4M | 1.44% | New |
| Gardner Russo & Quinn | $406.8M | 4.56% | Trimmed |
| Alkeon Capital | $361.8M | 1.40% | Trimmed |
| D1 Capital Partners | $199.0M | 0.57% | Added |
| Weitz Investment | $27.3M | 1.89% | Added |
| Tudor Investment | $1.6M | 0.01% | Added |
Important information
Facts from public SEC filings, shown for information only. Not a recommendation. Not individualized investment advice. Gulfstream Capital and its clients may hold positions in securities shown.