BE vs CMI: Which Is the Better Buy in 2026?

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.

Reading it: CMI 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. BE and CMI 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 BE and CMI 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.

Bloom Energy (BE) designs and manufactures solid-oxide fuel cell systems that generate electricity on-site for commercial and industrial customers. Its flagship product, the Bloom Energy Server, converts natural gas, biogas, or hydrogen into electricity through an electrochemical process that is cleaner and more efficient than combustion, providing reliable, always-on power independent of the grid. Customers use Bloom's systems for resilient primary or backup power, to reduce emissions, and increasingly to power energy-intensive facilities like data centers that need large amounts of dependable electricity quickly, often faster than utilities can deliver new grid capacity. Bloom also develops solid-oxide electrolyzer technology to produce hydrogen, positioning it for a potential hydrogen economy. The company sells equipment and offers service and financing arrangements, building a base of long-term service revenue. The investment story centers on distributed, resilient clean power and surging electricity demand from AI data centers. Founded in 2001 and headquartered in San Jose, California, Bloom Energy is a higher-risk clean-energy growth company working toward sustained profitability.

Full BE guide

Cummins Inc. is one of the world's largest independent makers of diesel and natural gas engines, and it operates across five segments: Engine, Components, Distribution, Power Systems, and Accelera (its low-carbon and electrification arm). Its products power heavy- and medium-duty trucks, buses, construction and mining equipment, and standby and prime power generators, and it runs a large aftermarket parts and service network. The Distribution segment is the largest by revenue, while Power Systems has been the fastest-growing thanks to demand for backup power at data centers.

Full CMI guide

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

• BE drivers: Data center power demand; Resilient distributed power.
• CMI drivers: Data center backup power; North American truck cycle.

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: Bloom has a long history of losses and has struggled to reach consistent profitability, relying on growth and financing to fund operations. For CMI, cummins is exposed to the industrial and freight cycle, so a downturn in truck demand or construction spending can cut engine volumes and margins quickly.

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 BE if you believe its drivers more; CMI 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 BE and CMI guides.

BE. Bloom Energy is a growth-stage clean-energy company, so it is valued on revenue growth, gross-margin improvement, and the path to sustained profitability rather than current earnings. The valuation embeds optimism about data center demand and distributed power adoption, making the stock highly sensitive to order momentum, clean-energy sentiment, interest rates, and incentive policy.

CMI. Cummins trades at a premium to its historical multiple after a large 2025-2026 run tied to data center power demand. The forward P/E near 23x sits well below the trailing figure, reflecting expected earnings growth as guidance was raised. The dividend is modest in yield but backed by a long record of annual increases.

Headline figures (approximate, early 2026): BE shows revenue (ttm) ~$1.3-1.6 billion, operating margin Thin to negative (approaching profitability), gross margin Improving, ~20-30% range, earnings Historically loss-making; profitability a key milestone; CMI shows revenue (fy2025) ~$33.7B, revenue (q1 2026) ~$8.4B, up ~3% YoY, net income (fy2025) ~$2.8B, market cap ~$96B.

BE and CMI 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 BE and CMI exposure against your real portfolio. It is not an investment adviser.