AM vs KMI: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of September 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: AM 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. AM and KMI 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 AM and KMI 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.

Antero Midstream Corporation gathers, compresses, and processes natural gas and handles water for well completions across the Marcellus and Utica shales in the Appalachian Basin. Its infrastructure includes gathering pipelines, compression stations, processing and fractionation joint ventures, and an integrated fresh-water and produced-water system spanning hundreds of miles of pipeline. Nearly all of its volumes and revenue come from a single customer, its affiliate Antero Resources (AR), under long-term, largely fee-based contracts, which makes AM a relatively steady cash-flow business but also a highly concentrated one.

Full AM guide

Kinder Morgan, Inc. (NYSE: KMI) is one of the largest energy infrastructure companies in North America, operating over 80,000 miles of pipelines and a portfolio of storage and terminal facilities. Its four business segments are Natural Gas Pipelines (the dominant driver), Products Pipelines, Terminals, and CO2. The Natural Gas Pipelines segment transports roughly 40% of all U.S. natural gas consumption and moves approximately 8 billion cubic feet per day to LNG export facilities, with contracted volumes expected to grow to nearly 12 Bcf per day by end of 2028. The company earns the vast majority of its revenue through long-term, fee-based contracts rather than direct commodity exposure, which gives cash flows a utility-like stability.

Full KMI guide

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

• AM drivers: Fee-based Appalachian volume growth; Acquisition and infrastructure scale.
• KMI drivers: LNG Export Tailwind; Power and Data-Center Demand.

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: AM's single largest risk is customer concentration: the overwhelming majority of its volumes and revenue come from affiliate Antero Resources, so any slowdown in AR's Appalachian drilling directly reduces AM's throughput and cash flow. For KMI, kMI carries approximately $32 billion in net debt, and a debt-to-equity ratio of roughly 1.06 is well above the midstream industry average, meaning that higher-for-longer interest rates or any refinancing at elevated costs could add hundreds of millions of dollars in annual interest expense and compress margins.

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 AM if you believe its drivers more; KMI 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 AM and KMI guides.

AM. As of July 2026, AM trades at a trailing P/E in the mid-to-high 20s and a forward P/E around 21x, with an EV/EBITDA multiple near 15x, levels that several analysts describe as near the higher end of its historical range. Q1 2026 revenue of roughly ~$314 million grew modestly year over year while adjusted EBITDA rose about 5% to ~$288 million. Figures are approximate and reference the July 2026 timeframe.

KMI. KMI's P/E of approximately 23 times is modestly above the broader energy sector average but below higher-growth midstream peers such as Williams Companies, which traded at roughly 34 times earnings as of mid-2025. The EV/EBITDA of approximately 13 times reflects the market's recognition of stable, contracted cash flows but also a balance sheet that carries roughly $32 billion in net debt at a Net Debt to Adjusted EBITDA ratio of 3.8 times. Investors in fee-based midstream companies typically weigh dividend yield and distributable cash flow coverage alongside traditional earnings multiples, since GAAP net income can understate actual cash generation at capital-intensive pipeline operators.

Headline figures (approximate, July 2026): AM shows revenue (ttm) ~$1.28 billion, adjusted ebitda (annualized) ~$1.15 billion, market cap ~$10 billion, net debt ~$3.7 billion; KMI shows revenue (q4 2025, quarterly) ~$4.51 billion, revenue (q1 2025, quarterly) ~$4.24 billion, adjusted ebitda (fy 2025) ~$8.3 billion, adjusted ebitda (fy 2026 budget) ~$8.6 billion.

AM and KMI 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 AM and KMI exposure against your real portfolio. It is not an investment adviser.