Martin Marietta Materials, Inc.
MLMLast close · Oct 16, 2026500.84+9.61 (+1.96%)
Market cap$30.1B
Of the 85 managers this site tracks, 3 held Martin Marietta Materials (MLM) at the end of Q2 2026, their latest 13Fs. The largest position by value was Chris Hohn's, $758.4M; Thomas Russo's ($406.8M) and Wallace Weitz's ($27.3M) follow. No Schedule 13D or 13G is on file for MLM from the activists and large holders the site follows.
Superinvestors holding MLM
| Manager | Firm | Quarter | Shares | Value |
|---|---|---|---|---|
| Chris Hohn | TCI Fund Management Ltd | Q2 2026 | 1M | $758.4M |
| Thomas Russo | Gardner Russo & Quinn LLC | Q2 2026 | 705,367 | $406.8M |
| Wallace Weitz | Weitz Investment Management, Inc. | Q2 2026 | 47,370 | $27.3M |
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.