MLM vs VMC: How Martin Marietta Materials and Vulcan Materials Compare (2026)
Last updated August 2026
Short answer
MLM (Martin Marietta Materials) and VMC (Vulcan Materials) share investment themes but are different businesses. The right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme.
MLM vs VMC: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | MLM | VMC | What it tells you |
|---|---|---|---|
| Market cap | $31.54B | $34.80B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 23.38 | 24.88 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 34.12 | 31.63 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 1.10 | 1.05 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 1% of range | 21% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 2.79 | 4.11 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Before you buy: how MLM and VMC affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. MLM and VMC share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined MLM and VMC exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does Martin Marietta Materials (MLM) do?
Martin Marietta Materials is the second-largest construction aggregates producer in the United States, behind Vulcan Materials. The aggregates business model is identical to Vulcan: heavy aggregates products with high transport costs create local pricing power within each quarry's service area. Martin Marietta operates approximately 350 aggregates facilities across the US with concentration in Texas, Colorado, the Carolinas, and other high-growth states.
What does Vulcan Materials (VMC) do?
Vulcan Materials is the largest producer of construction aggregates in the United States. Aggregates (crushed stone, sand, gravel) are the fundamental inputs to concrete, asphalt, and road base used in virtually every construction project. The business is local and economic: aggregates are heavy and expensive to transport relative to their value, so each Vulcan quarry serves a relatively local market (typically 50-100 miles depending on transport mode). This creates regional pricing power.
MLM vs VMC: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- MLM drivers: Federal infrastructure tailwind; Texas cement franchise.
- VMC drivers: Federal infrastructure spending; Residential and commercial construction.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Construction cycle volatility. For VMC, construction activity is cyclical.
MLM or VMC: which should you pick?
MLM vs VMC: the full fundamentals
MLM. Martin Marietta trades at a premium similar to (slightly below) Vulcan, reflecting the same durable aggregates pricing model, the federal infrastructure tailwind, and the Texas cement franchise. The valuation has expanded with the broader infrastructure thesis.
VMC. Vulcan trades at one of the highest multiples in industrials reflecting the durable pricing power, the federal infrastructure tailwind, the population migration tailwind to Vulcan's geographic footprint, and the irreplaceable nature of aggregates reserves. The premium has been sustained for years.
Headline figures (approximate, early 2026): MLM shows revenue (ttm) ~$6.7 billion, operating margin ~22%, net income (ttm) ~$1 billion, eps (ttm) ~$17.00; VMC shows revenue (ttm) ~$8 billion, operating margin ~21%, net income (ttm) ~$1 billion, eps (ttm) ~$7.50.
The bottom line: MLM vs VMC
MLM and VMC are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined MLM and VMC exposure against your real portfolio. It is not an investment adviser.
Wondering how MLM or VMC fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Martin Marietta Materials with AI
Connect the broker you already use and ask Walnut's AI how MLM fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between MLM and VMC?
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Martin Marietta Materials is the second-largest construction aggregates producer in the United States, behind Vulcan Materials. Vulcan Materials is the largest producer of construction aggregates in the United States. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is MLM or VMC the better stock?
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Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, MLM or VMC?
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On forward P/E (as of August 2026), MLM trades at 23.38x and VMC at 24.88x, so MLM is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both MLM and VMC?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of MLM vs VMC?
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MLM: Construction cycle volatility. Energy costs affect operating margins. Texas market concentration creates regional exposure. Reserve permitting is increasingly difficult. VMC: Construction activity is cyclical. Energy costs (fuel for trucks and processing) affect operating margins. Reserve life requires ongoing acquisitions and permitting; new quarry permits are increasingly difficult to obtain.
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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell MLM or VMC; figures are approximate and dated (as of August 2026). Verify current data before investing.