SR 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.

Reading it: SR 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. SR 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 SR 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.

Spire Inc. is a public utility holding company headquartered in St. Louis with roots going back to the 1850s. Its regulated distribution utilities (Spire Missouri, Spire Alabama, Spire Gulf, Spire Mississippi and Spire Tennessee) buy natural gas, move it through their own distribution and transmission pipelines, and sell it to residential, commercial and industrial customers under rates set by state commissions. A small Midstream segment holds pipeline and storage assets that serve the utilities. The company closed a ~$2.48 billion purchase of Duke Energy's Piedmont Tennessee local distribution business on March 31, 2026, adding more than 200,000 customers around Nashville and nearly 3,800 miles of pipeline, and it agreed in April 2026 to sell its smaller Mississippi utility to Delta Utilities for ~$75 million. Spire's fiscal year ends September 30, which matters when reading any trailing figure.

Full SR 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.

• SR drivers: Rate base growth is the earnings engine; Tennessee is the newest and fastest-growing piece.
• 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 drive nearly everything here: Alabama and Gulf RSE renewal hearings were held in August 2026 with requested returns on equity of ~10.5% to 10.75%, and Spire expects to make its first Missouri future test year rate case filing around November 2026, so an unfavorable order in either place would flow straight to earnings. 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 SR 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 SR and SWX guides.

SR. At roughly $81 a share, SR trades near ~20 times the midpoint of fiscal 2026 adjusted guidance and closer to ~15 times the fiscal 2027 midpoint. Those two multiples describe different companies, because fiscal 2027 carries a first full year of Tennessee earnings plus the Missouri and Alabama rates that took effect during fiscal 2026, so anchoring on the trailing number overstates how expensive the shares look. Pure-play gas distributors have generally traded in the high teens to low twenties on forward earnings, which puts Spire inside its peer band rather than at either edge of it.

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): SR shows revenue (ttm) ~$2.7B, with ~$2.14B in the first nine months of fiscal 2026, adjusted eps guidance ~$3.90 to $4.10 for FY2026, ~$5.40 to $5.60 for FY2027, market cap ~$4.8B at a share price near ~$81, dividend ~$0.825 per quarter (~$3.30 annualized), ~4.1% yield, 23rd consecutive annual increase; 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.

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