AROC vs KGS: Which Is the Better Buy in 2026?
Last updated October 2026
Short answer
AROC (Archrock) and KGS (Kodiak Gas Services) share investment themes but are different businesses. The right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme.
AROC vs KGS: the tie-breaker metrics
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.
| Metric | AROC | KGS | What it tells you |
|---|---|---|---|
| Market cap | $5.18B | $4.77B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 13.59 | 14.88 | 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 | 15.89 | 54.90 | 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 | 0.91 | 0.94 | 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 | 35% of range | 32% 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 | 3.34 | 2.21 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Before you buy: how AROC 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. AROC 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 AROC 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 Archrock (AROC) do?
Archrock, Inc. is a Houston-based energy infrastructure company that owns and operates a fleet of natural gas compressors, about 4.5 million operating horsepower at the end of June 2026, and rents them to producers and midstream operators under multi-year contracts. Compression is needed at almost every step of the gas value chain: at the wellhead, in gathering systems, at processing plants and along pipelines. Its Contract Operations segment (about $329 million of second-quarter 2026 revenue of ~$371 million, or roughly 89%) earns monthly fees based on horsepower deployed, with heavy exposure to the Permian Basin and an adjusted gross margin of about 71%. A smaller Aftermarket Services segment sells parts, maintenance and overhauls for customer-owned equipment. Acquisitions of TOPS (2024) and Natural Gas Compression Systems (2025) pushed the fleet further toward large, high-horsepower units.
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.
AROC 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.
- AROC drivers: U.S. natural gas volume growth; Contracted fleet and pricing.
- 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: Archrock's demand ultimately depends on U.S. 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 (the September 2026 West Texas contract, for example, does not start producing revenue until Q1 2027).
AROC or KGS: which should you pick?
AROC vs KGS: the full fundamentals
AROC. At ~$5.2 billion of equity value plus roughly $2.35 billion of long-term debt (leverage ~2.6x), Archrock trades at about 8.5x the midpoint of its 2026 adjusted EBITDA guidance as of October 2026. That multiple is lower than when the shares sat near the 52-week high of ~$42.23 in June, reflecting the trimmed outlook, lower utilization and weaker aftermarket results. Second-quarter diluted EPS was $0.38, up from $0.36, and 2026 net income guidance is about $291 to $311 million. Third-quarter results, not yet scheduled by the company as of mid-October, will update these figures.
KGS. The headline P/E is misleading in both directions: trailing net income of ~$78 million on ~$1.39 billion of revenue reflects heavy depreciation on a compression fleet and interest on acquisition debt, while EBITDA of ~$749 million (about 10 times EV to EBITDA) and discretionary cash flow are the numbers management and most analysts anchor on. The forward P/E near 15 assumes EPS of roughly ~$3.17 in 2027, against consensus of ~$2.54 for 2026, so the valuation leans on the power ramp arriving on schedule. Q3 2026 results are due November 3, 2026, with consensus near ~$0.66 EPS on ~$388 million of revenue.
Headline figures (approximate, October 2026): AROC shows q2 2026 revenue ~$371.2 million (vs ~$383.2 million in Q2 2025), q2 2026 adjusted ebitda ~$212.6 million (flat year over year), 2026 adjusted ebitda guidance $865 to $885 million (narrowed from $865 to $915 million), market cap ~$5.2 billion (share price ~$29.50); KGS shows revenue (ttm) ~$1.39B; Q2 2026 ~$391M (+21% YoY), margins (ttm) ~64% gross, ~34% operating, ~6% net, net income (ttm) ~$78M; Q2 2026 EPS ~$0.55 vs ~$0.71 consensus, p/e (trailing / forward) ~58x / ~15x.
The bottom line: AROC vs KGS
AROC 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 AROC and KGS exposure against your real portfolio. It is not an investment adviser.
Wondering how AROC 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 Archrock with AI
Connect the broker you already use and ask Walnut's AI how AROC 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 AROC and KGS?
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Archrock, Inc. 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 AROC 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, AROC or KGS?
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On forward P/E (as of October 2026), AROC trades at 13.59x and KGS at 14.88x, so AROC 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 AROC 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 AROC vs KGS?
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AROC: Archrock's demand ultimately depends on U.S. oil and gas activity, so a sustained drop in crude prices that slows Permian drilling, and with it associated gas growth, could delay new orders and pressure rates even though existing contracts keep running. The 2026 guidance trim showed that costs such as make-ready work, lube oil and incentive compensation can erode margins while revenue grows. Period-end utilization of 94.4%, down from 96.0%, leaves less room before idle horsepower starts to weigh on returns. Aftermarket Services is volatile: revenue fell about 35% in the second quarter on lower parts sales and maintenance work, and full-year guidance of $175 to $185 million is well below the prior-year pace. Competitors including Kodiak Gas Services and USA Compression Partners are also adding large-horsepower capacity, which could weaken pricing. Finally, the $1.4 to $1.6 billion growth capex plan for 2027 through 2030 competes with dividends, buybacks and debt reduction for cash, and customer concentration rises with large contracts like the ~665,000 horsepower agreement. 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 (the September 2026 West Texas contract, for example, does not start producing revenue until Q1 2027). Total debt near ~$2.8 billion against ~$138 million of cash leaves less cushion than the balance sheet had before the buildout, and a trailing P/E near 58 reflects how little of the EBITDA survives depreciation and interest. Execution has also been uneven: EPS missed consensus in three of the last four quarters, including ~$0.55 against ~$0.71 in Q2 2026. 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. Several insiders, including the CEO, sold shares in September 2026, and the stock fell ~19% in the month to October 16, 2026, which shows how volatile the power premium is.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell AROC or KGS; figures are approximate and dated (as of October 2026). Verify current data before investing.