EXP vs MLM: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 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.

Reading it: EXP is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

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. EXP and MLM 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 EXP and MLM 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.

Eagle Materials (NYSE: EXP) is a US-focused producer of basic building materials organized into two sectors. Its Heavy Materials sector makes portland cement, aggregates, and ready-mix concrete sold largely into infrastructure and non-residential construction, while its Light Materials sector produces gypsum wallboard and the recycled paperboard used to make it, sold mostly into residential construction and remodeling. The company operates a network of low-cost plants concentrated in the US Heartland and Sunbelt, positioning it near growing regional demand and giving it logistics advantages in cement, which is expensive to ship long distances.

Full EXP guide

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 hundreds of aggregates facilities across the US with concentration in Texas, Colorado, the Carolinas and other high-growth states, and 2026 added quarries in Virginia, Missouri, Kansas, British Columbia, Minnesota and along the I-70 corridor.

Full MLM guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• EXP drivers: Cement and infrastructure strength; Low-cost, US-centric footprint.
• MLM drivers: Federal infrastructure tailwind; Lime and specialty minerals through Lhoist North America.

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: Eagle's results are highly cyclical and tied to US construction, so a downturn in infrastructure funding, non-residential building, or housing directly pressures volumes and prices. For MLM, construction cycle volatility.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick EXP if you believe its drivers more; MLM if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the EXP and MLM guides.

EXP. The multiple has compressed since mid-2026: about 13.5x trailing earnings and under 10x EBITDA, down from roughly 15x and 11x, as earnings fell and the share price dropped about 16% over three months. Multiples on cyclicals can look deceptively low near peak margins and high near troughs, so where the construction cycle stands matters more than the headline ratio. Analysts carry a hold consensus with a mean target near $196, and fiscal Q2 results expected around October 29, 2026 (consensus ~$4.0 EPS on ~$636M revenue) are the next data point.

MLM. Martin Marietta trades at about 32.5x trailing and 23x forward earnings, a premium that has compressed as the shares fell about 21% this year while 2026 earnings are expected to dip about 9% before rebounding about 25% in 2027 with Lhoist included. The 24 covering analysts hold a buy consensus with a mean target near $634, though most have trimmed targets since late September.

Headline figures (approximate, October 2026): EXP shows revenue (ttm) ~$2.32B (June 2026 quarter ~+3% YoY), net income (ttm) ~$403M (FY2026: ~$424M, down ~9%), margins (operating / net) ~22% / ~17%, diluted eps (trailing / forward) ~$12.69 / ~$13.61; MLM shows revenue (ttm) ~$6.7 billion; Q2 2026 revenue up 21% year over year to a record ~$1.95 billion, operating margin ~20%, eps (ttm) ~$15.42; forward ~$21.90, p/e ~32.5x trailing, ~23x forward.

EXP and MLM 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 EXP and MLM exposure against your real portfolio. It is not an investment adviser.