MLM · CUSIP 573284106
MARTIN MARIETTA MATLS INC
Reported by 3 of 79 curated managers in Q2 2026, in the holdings snapshot last exported 2026-10-26.
- Managers holding
- 3
- Average portfolio weight
- 2.6%
- Combined reported value
- $1.2B
- Research group
- 79
3 of the 79 superinvestors Shameless Cloning tracks reported MARTIN MARIETTA MATLS INC (MLM) in their Q2 2026 13F filings, worth $1.2B combined, at an average 2.6% of their portfolios. The largest positions by portfolio weight belong to Thomas Russo (4.6%), Wallace Weitz (1.9%), Chris Hohn (1.4%).
Reporting managers
This is a historical 13F snapshot, not a live shareholder register. The count covers all matched managers; dashboard rankings use only those with at least 95% coverage. Reported value is measured at filing quarter-end, not at today's price.
| Manager / SEC filer | % of portfolio | Reported value |
|---|---|---|
| Thomas RussoGARDNER RUSSO & QUINN LLC | 4.6% | $406.8M |
| Wallace WeitzWEITZ INVESTMENT MANAGEMENT, INC. | 1.9% | $27.3M |
| Chris HohnTCI FUND MANAGEMENT LTD | 1.4% | $758.4M |