OGS vs SWX: 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.

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. OGS and SWX 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 OGS and SWX 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.

ONE Gas runs three regulated natural gas distribution utilities and nothing else: Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service, together serving roughly 2.3 million customers, about 92% of them residential. The company does not drill for gas, does not own long-haul pipelines, and does not sell electricity. It buys gas, delivers it, and passes the commodity cost through to customers at no markup. Earnings come instead from an allowed return on capital sunk into pipe, meters and regulators, an average rate base of about $6.4 billion in 2026. Terms are set state by state: allowed returns on equity near 9.4% in Oklahoma, 9.5% in Kansas and 9.8% in Texas, on equity layers around 60%. Roughly 70% of margin arrives as fixed customer charges, so a mild winter bruises results less than it once did.

Full OGS guide

Southwest Gas Holdings owns Southwest Gas Corporation, which distributes natural gas to roughly 2.2 million residential, commercial and industrial customers in Arizona, Nevada and portions of California, plus Great Basin Gas Transmission, the FERC-regulated interstate pipeline that moves gas into northern Nevada. Revenue comes from tariffed rates approved by the Arizona Corporation Commission, the Public Utilities Commission of Nevada, the California Public Utilities Commission and FERC. Because the commodity itself is largely passed through to customers, the figure management reports and investors follow is operating margin (revenue less the net cost of gas sold), which came in at ~$319.7 million in the second quarter of 2026.

Full SWX guide

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

• OGS drivers: Rate base growth, funded by a defined capital plan; Rate cases and the trackers that shorten regulatory lag.
• SWX drivers: Three rate cases in flight at once; The Great Basin 2028 expansion.

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: Regulatory outcomes are the central risk: a commission can disallow spending, set a lower allowed return, or simply take long enough that the company under-earns on capital already deployed. For SWX, regulatory lag is the central problem: the trailing twelve-month return on equity was about 8.1%, below the returns commissions have historically authorized, meaning the utility has been investing faster than rates have caught up.

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 OGS if you believe its drivers more; SWX 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 OGS and SWX guides.

OGS. A sales multiple is close to meaningless here, since the commodity component of revenue is billed at cost and simply flows back out. Regulated gas distributors are compared on price to earnings against rate base growth and allowed ROE, and OGS at roughly 17 times trailing earnings sits in the normal band for the group. Total debt of about $3.4 billion against A3 and A- credit ratings, with adjusted cash flow to debt guided at 19% to 20%, is the other half of the valuation conversation.

SWX. Trailing multiples on SWX are misleading right now. Reported trailing EPS of roughly $7.54 includes the gain on the Centuri disposition, which produces an optically cheap trailing P/E near 12x that has nothing to do with the ongoing utility. Measured against continuing-operations guidance the shares sit around 21x, a premium to the mid-teens multiples common among regulated gas distributors, which is the market pricing in the Great Basin margin and the double-digit rate base growth target.

Headline figures (approximate, August 2026): OGS shows revenue (ttm) ~$2.31B, heavily pass-through gas cost, net income / eps (ttm) ~$288M, ~$4.66 per diluted share, q2 2026 (reported august) adjusted net income ~$52.1M, ~$0.82 per share, GAAP ~$0.74, 2026 adjusted eps guidance ~$4.83 to ~$4.95, raised to the upper half; SWX shows revenue (ttm) ~$1.74B (utility and pipeline only after the Centuri separation), market cap ~$6.5B at a share price near ~$89, 2026 eps guidance (continuing operations) ~$4.17 to $4.32, reaffirmed with Q2 results, forward p/e ~21x the midpoint of 2026 continuing-operations guidance.

OGS and SWX 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 OGS and SWX exposure against your real portfolio. It is not an investment adviser.