What smart money is saying about Martin Marietta Materials
2 funds in our archive have pitched Martin Marietta Materials, most recently Aristotle Value Equity Strategy in September 2026.
Martin Marietta Materials, Inc. functions as a company specializing in natural resource-derived building materials. This enterprise delivers a wide range of aggregates and other heavy construction components to the building industry, serving both domestic and international markets. Its product portfolio includes foundational raw materials like crushed stone, sand, and gravel, in addition to manufactured items such as ready-mix concrete, asphalt, and comprehensive paving solutions. These offerings are essential for infrastructure projects, commercial and residential developments, and various other sectors including railroads, agriculture, utilities, and environmental applications. Beyond its core construction offerings, Martin Marietta also produces magnesia-based chemicals, which are utilized in industrial, agricultural, and environmental contexts. The company further supplies dolomitic lime, primarily for steel manufacturing and soil stabilization. Its broader chemical products contribute to areas such as flame retardants, wastewater treatment, and pulp and paper production, among other environmental uses. Established in 1939, the firm's main office is situated in Raleigh, North Carolina.
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Fund signal · last 12 months
13 lettersMore funds are buying than selling
Moves described in fund letters in our archive. A sentence published word for word by several funds of one house in the same quarter counts once.
Position history
Between Q1 2025 and Q3 2026, 14 fund letters reported a position in Martin Marietta Materials, with 4 buys (opened or added) and 1 sell (trimmed or exited).
| Quarter | Letters | Bought | Sold | Theses |
|---|---|---|---|---|
| Q3 2026 | 6 | 2 | 1 | 1 |
| Q2 2026 | 7 | 2 | 0 | 0 |
| Q3 2025 | 1 | 0 | 0 | 0 |
| Q1 2025 | 0 | 0 | 0 | 1 |
Bought and Sold count moves: the same sentence published by several funds of one house in a quarter counts once.
Fund activity · 14 positions · 5 moves
- September 2026
“Higher oil prices also contributed to the sharp rise in interest rates during the quarter, which affected various areas of the market and had a mixed impact on the portfolio’s relative performance. Higher rates contributed to poor returns for utilities, so our underweight to the sector contributed to relative returns in the quarter; however, certain holdings with rate-sensitive housing exposure, including Martin Marietta Materials and Ferguson Enterprises, detracted.”
Martin Marietta Materials - New positionDiamond Hill Select FundSeptember 2026
“• We initiated a position in building materials supplier Martin Marietta following weakness in construction sentiment across residential, nonresidential and infrastructure markets, as well as concerns surrounding a sizable acquisition that increased leverage.”
Martin Marietta Materials - September 2026
“Top 3 Detractors from Relative Performance Entegris, Inc. (ENTG) – ENTG declined as semiconductor stocks pulled back after a very large run, despite a strong quarter with accelerating customer spending. We remain attracted to ENTG’s competitive position, high barriers to entry, and rising free cash flow as its investment cycle winds down. Old Dominion Freight Line, Inc. (ODFL) – ODFL declined alongside other trucking stocks even as results improved on firmer pricing and better sequential volumes. Volumes remain soft, but management sees room to grow without adding capacity. We remain confident in ODFL's network capacity, operating leverage, and cost structure, which should drive strong earnings growth as freight recovers. Martin Marietta Materials, Inc. (MLM) – MLM declined as investors weighed the Lhoist acquisition, higher leverage, and uncertainty around the next phase of federal infrastructure funding.”
Martin Marietta Materials - September 2026
“Martin Marietta, a leading supplier of construction aggregates and building materials, was the largest detractor during the quarter.”
Martin Marietta Materials - September 2026
“We also bought more Martin Marietta Materials shares as the team gained confidence in the company’s Lhoist North America limestone acquisition.”
Martin Marietta Materials - September 2026
“Vulcan Materials and Martin Marietta Materials were the Fund’s top quarterly detractors as mixed demand drivers and price-cost pressures softened the 2026 earnings outlook.”
Martin Marietta Materials - June 2026
“Top 3 Detractors from Relative Performance Republic Services, Inc. (RSG) – RSG declined despite another solid quarter as softer Environmental Solutions results and continued weakness in construction-related volumes weighed on investor sentiment. Core fundamentals remain strong, with pricing continuing to outpace inflation, early signs of volume stabilization, and structural margin expansion supported by productivity initiatives. We remain confident in RSG’s disciplined capital allocation, favorable landfill dynamics, and long runway for earnings growth. Martin Marietta Materials, Inc. (MLM) – MLM declined as pricing was temporarily impacted by acquisition mix and softer residential and light non-residential construction activity.”
Martin Marietta Materials - HoldsMD SASS Concentrated ValueJune 2026
“the effect was compounded by our ownership of businesses with meaningful commodity input costs, including Primo Brands (PRMB), Somnigroup (SGI), and Martin Marietta (MLM),”
Martin Marietta Materials - June 2026
“Martin Marietta, a leading supplier of construction aggregates and building materials, was a detractor during the quarter.”
Martin Marietta Materials - June 2026
“Martin Marietta, a leading supplier of construction aggregates and building materials, was a detractor during the quarter.”
Martin Marietta Materials - June 2026
“The largest detractor year-to-date based on relative performance vs. the benchmark was Martin Marietta.”
Martin Marietta Materials - New positionWeitz Investments Large Cap Equity FundJune 2026
“We bought new positions in Martin Marietta Materials and Veralto during the quarter.”
Martin Marietta Materials - June 2026
“During the quarter we added to the Fund’s positions in Danaher, Thermo Fisher Scientific, and Martin Marietta Materials at prices we think offer substantial upside with favorable risk profiles.”
Martin Marietta Materials - September 2025
“Martin Marietta Materials Inc. supplies aggregates to the building industry.”
Martin Marietta Materials
Fund coverage · 2 theses
- Aristotle Value Equity StrategySeptember 2026
Martin Marietta Materials is a leading aggregates and building materials supplier whose advantaged reserves, pricing discipline and higher-margin mix should support long-term earnings and cash flow growth.
Read the full thesis - Diamond Hill Mid Cap FundMarch 2025
Martin Marietta Materials is a strategically positioned heavy building materials supplier poised for growth, making it an attractive investment opportunity following recent share price pressures.
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