Martin Marietta Materials Inc. (MLM) Stock
NYSEMLM has an Alpha Score of 51 out of 100 (weak), computed on Nov 3, 2026 from 3 of 4 sub-scores. 6 members of Congress disclosed 20 trades in MLM since 2017: 13 purchases and 7 sales, most recently April McClain Delaney (sale, Aug 25, 2026). 6 of the hedge funds AlphaScala tracks reported MLM in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Millennium Management's at $31.22M. Its trailing P/E ratio is 15.5 and its net margin 36.7% (key statistics as of Oct 31, 2026).
What is MLM's Alpha Score?
How it works →Alpha Score of 51 reflects moderate overall profile with moderate momentum, weak value, strong quality. Based on 3 of 4 signals – score is capped at 90 until remaining data ingests.
Computed from 3 of 4 sub-scores; a sub-score is left out when its inputs are missing, and the composite is capped accordingly.
Computed Nov 3, 2026
A rules-based research rating, not a recommendation to buy or sell.
Which members of Congress traded Martin Marietta Materials Inc. (MLM)?
Most recent: April McClain Delaney (sale, Aug 25, 2026); records start Nov 15, 2017.
| Politician | Trade date | Type | Amount |
|---|---|---|---|
| April McClain Delaney D-MD · House | 2026-08-25 | sale | $250k – $500k |
| April McClain Delaney D-MD · House | 2026-08-19 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-07-24 | purchase | $15k – $50k |
| April McClain Delaney D-MD · House | 2026-07-20 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-07-17 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-28 | purchase | $1k – $15k |
| Josh Gottheimer D-NJ · House | 2026-04-09 | sale | $15k – $50k |
| April McClain Delaney D-MD · House | 2026-03-09 | purchase | $1k – $15k |
From STOCK Act periodic transaction reports. House filings as of Nov 5, 2026.
See all MLM political trades →Which hedge funds own MLM?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Millennium Management Israel Englander | 54K | $31.22M | +264% |
| Renaissance Technologies Jim Simons (founder) | 32K | $18.39M | NEW |
| Citadel Ken Griffin | 26K | $14.93M | +55% |
| Marshall Wace | 5K | $2.61M | NEW |
| D.E. Shaw David Shaw | 1K | $824.7K | NEW |
| Blackstone | 1K | $624.0K | +22% |
13F holdings as of Jun 30, 2026
Explore all tracked funds →What are MLM's key statistics?
Key statistics as of Oct 31, 2026
How does MLM's valuation compare with the Materials sector?
| Metric | MLM | Materials median | Companies in median |
|---|---|---|---|
| P/E ratio | 15.5 | 18.8 | 76 |
| Net margin | 36.73% | 9.19% | 85 |
| Return on equity | 23.07% | 13.06% | 89 |
| Dividend yield (payers) | 0.64% | 1.83% | 64 |
Medians over the Materials stocks whose key statistics were refreshed in the last 35 days (newest Nov 7, 2026). P/E excludes loss-making companies.
MLM price chart
Powered by TradingViewWhat does Martin Marietta Materials Inc. do?
Martin Marietta Materials, Inc. is an American-based company and a leading supplier of aggregates and heavy building materials. It provides essential resources such as crushed stone, gravel, sand, ready mixed concrete, and asphalt, which form the foundations for roads, sidewalks, infrastructure, and communities. Operating through a network of facilities across 28 states, Canada, and the Bahamas, the company serves the construction industry with high-quality, engineered granular materials of varying minerologies. Additionally, its Specialties business produces high-purity magnesia, magnesium hydroxide, dolomitic lime, and other magnesium oxide products for environmental, industrial, agricultural, and specialty applications worldwide. Martin Marietta Materials, Inc. also offers performance-driven concrete mix designs, ancillary products, and cement and lime wholesaling. Headquartered in Raleigh, North Carolina, it plays a vital role in supporting infrastructure development and sustainable building practices across key sectors.