CAT vs KGS: How Caterpillar and Kodiak Gas Services Compare (2026)
Last updated August 2026
Short answer
CAT and KGS are similarly sized, but KGS trades noticeably cheaper on forward earnings (18.83x vs 26.76x): the market is paying up for CAT's profile and pricing KGS more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.
CAT vs KGS: 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 | CAT | KGS | What it tells you |
|---|---|---|---|
| Forward P/E | 26.76 | 18.83 | 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 | 40.66 | 76.39 | 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 | 1.57 | 0.91 | 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 | 61% of range | 59% 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 | 20.11 | 4.28 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: KGS 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.
Before you buy: how CAT and KGS 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. CAT and KGS 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 CAT and KGS 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 Caterpillar (CAT) do?
Caterpillar is the world's largest manufacturer of construction and mining equipment, and a major maker of diesel and natural gas engines, industrial gas turbines, and locomotives. It sells bulldozers, excavators, loaders, dump trucks, and related heavy machinery used in construction, mining, quarrying, and infrastructure, plus power systems and engines for oil and gas, marine, power generation, and data-center backup. Caterpillar makes money by selling new equipment through a global dealer network and, increasingly importantly, by selling high-margin aftermarket parts, services, and financing through Cat Financial. Its three core segments are Construction Industries, Resource Industries (mining), and Energy and Transportation. The company is highly cyclical, tied to global construction activity, commodity prices, and infrastructure spending, but its large installed base generates recurring service revenue that smooths the cycle. Caterpillar is headquartered in Irving, Texas, and sells worldwide.
What does Kodiak Gas Services (KGS) do?
Kodiak Gas Services, Inc. owns and operates contract compression infrastructure for oil and gas producers and midstream operators, primarily in the Permian Basin and Eagle Ford. Customers pay monthly fees for Kodiak to install, run, and maintain large-horsepower compression packages that push associated natural gas through gathering systems, so revenue tracks installed horsepower under contract rather than the commodity price directly. The 2024 all-equity acquisition of CSI Compressco (~$854 million) created the industry's largest fleet and added gas treating, cooling, and aftermarket services, and the fleet stood at ~4.39 million revenue-generating horsepower at ~98% utilization in Q1 2026.
CAT vs KGS: 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.
- CAT drivers: Infrastructure and construction demand; Energy and data-center power.
- KGS drivers: Distributed power for data centers; Contracted compression as the cash engine.
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: Caterpillar is deeply cyclical. For KGS, the power expansion is capital intensive and unproven at scale for Kodiak: growth capex is guided at ~$645 million to ~$775 million for 2026, and turbine and engine delivery slots stretch into 2029, so contracted megawatts and actual cash flow can arrive years apart.
CAT or KGS: which should you pick?
CAT vs KGS: the full fundamentals
CAT. Caterpillar trades as a high-quality cyclical: investors pay a moderate earnings multiple that reflects best-in-class margins, a wide dealer moat, and growing services revenue, balanced against the inherent volatility of construction and mining demand. The valuation tends to expand on infrastructure and data-center power optimism and contract when global growth signals soften.
KGS. The headline P/E is misleading in both directions: net income of ~$66 million on ~$1.32 billion of revenue reflects heavy depreciation on a compression fleet and interest on acquisition debt, while adjusted EBITDA of ~$820 million to ~$860 million and discretionary cash flow of ~$520 million to ~$570 million are the numbers management and most analysts anchor on. Fleet utilization at ~98% and a ~70.6% compression gross margin show the base business running near capacity. Q2 2026 results are due August 6, 2026, and the market's focus is on power contract announcements rather than the compression line.
Headline figures (approximate, early 2026): CAT shows revenue (ttm) ~$65 billion, operating margin ~20%, net income (ttm) ~$10 billion, dividend yield ~1.5%, with a long growth record (Dividend Aristocrat); KGS shows revenue (ttm) ~$1.32B, q1 2026 revenue ~$346M (+5% YoY), q1 2026 adjusted ebitda ~$190M (~55% margin), 2026 adjusted ebitda guidance ~$820M-$860M.
The bottom line: CAT vs KGS
CAT and KGS 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 CAT and KGS exposure against your real portfolio. It is not an investment adviser.
Wondering how CAT or KGS 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 Caterpillar with AI
Connect the broker you already use and ask Walnut's AI how CAT 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 CAT and KGS?
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Caterpillar is the world's largest manufacturer of construction and mining equipment, and a major maker of diesel and natural gas engines, industrial gas turbines, and locomotives. Kodiak Gas Services, Inc. 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 CAT or KGS 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, CAT or KGS?
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On forward P/E (as of August 2026), CAT trades at 26.76x and KGS at 18.83x, so KGS 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 CAT and KGS?
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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 CAT vs KGS?
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CAT: Caterpillar is deeply cyclical. A global construction slowdown, falling commodity prices that curb mining capital spending, or a recession would cut equipment demand and pressure margins and the stock. The business is exposed to China and emerging-market construction, currency swings, and trade and tariff policy. Mining capital expenditure is lumpy and tied to volatile metals and energy prices. Long-term, electrification and shifts away from diesel could challenge parts of the engine business. Premium valuations reached during cyclical peaks can compress quickly when orders soften, and dealer inventory swings can amplify the volatility of reported results. KGS: The power expansion is capital intensive and unproven at scale for Kodiak: growth capex is guided at ~$645 million to ~$775 million for 2026, and turbine and engine delivery slots stretch into 2029, so contracted megawatts and actual cash flow can arrive years apart. Leverage near 3.6x leaves less cushion than the balance sheet had before the buildout, and a reported P/E near 77 reflects how little of the ~55% adjusted EBITDA margin survives depreciation and interest. Data center power demand is currently a bidding war, and hyperscalers may prefer grid interconnects, utility contracts, or rival providers as those options free up. The compression base remains tied to Permian and Eagle Ford activity, so a sustained oil price decline would eventually slow horsepower additions even though existing contracts are sticky. The shares have roughly doubled off their 52-week low near ~$30, which means expectations for the power story are already embedded in the price.
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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell CAT or KGS; figures are approximate and dated (as of August 2026). Verify current data before investing.