KMI vs WMB: How Kinder Morgan and Williams Companies Compare (2026)

Same yardstick, side by side (as of July 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: KMI 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. KMI and WMB 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 KMI and WMB 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.

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

The Williams Companies, Inc. (NYSE: WMB) is a Tulsa-based energy infrastructure company focused almost entirely on natural gas. Its crown jewel is Transco, an interstate pipeline running more than 10,000 miles from south Texas and the Gulf Coast up the Atlantic Seaboard to the New York City area, complemented by the Northwest Pipeline in the Pacific Northwest and an extensive footprint of gathering, processing, and storage assets in basins such as the Marcellus and Haynesville. Williams makes most of its money through long-term, fee-based and capacity-reservation contracts under which customers pay to reserve and use pipeline space largely regardless of how much gas actually flows, which gives its cash flows a utility-like stability. Across its systems, Williams handles roughly a third of the natural gas used in the United States.

Full WMB guide

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

• KMI drivers: LNG Export Tailwind; Power and Data-Center Demand.
• WMB drivers: Fee-based gas transport core; LNG export and Transco expansion growth.

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: 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. For WMB, williams carries meaningful leverage, with net debt of roughly $29.5 billion, so a period of higher-for-longer interest rates would raise refinancing costs and could compress free cash flow.

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

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.

WMB. Reading a midstream C-corp like Williams is less about GAAP net income and more about contracted cash flow. Investors typically focus on adjusted EBITDA, available funds from operations (AFFO) or distributable cash flow, dividend coverage (AFFO comfortably exceeded the dividend in FY2025), and leverage measured as net debt to EBITDA. Because most EBITDA is fee-based, results are steadier than a producer's, and the headline EV/EBITDA multiple captures the market's view of that durability plus growth from expansions and power projects. As a C-corporation, Williams reports its payout on a 1099 dividend form rather than the K-1 that MLP-structured peers issue, which simplifies tax filing.

Headline figures (approximate, June 27, 2026 (based on Q4 2025 and Q1 2026 reported data and 2026 guidance)): 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; WMB shows adjusted ebitda (fy2025) ~$7.75 billion, up ~9% YoY, adjusted eps (fy2025) ~$2.10 per diluted share, available funds from operations (fy2025) ~$5.86 billion, 2026 adjusted ebitda guidance (midpoint) ~$8.2 billion.

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