ARIS vs WTTR: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of September 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: ARIS 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. ARIS and WTTR 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 ARIS and WTTR 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.

Aris Mining produces gold from the Segovia complex in Antioquia, Colombia, and the Marmato mine in Caldas, Colombia. Segovia is the engine: it delivered roughly 64 thousand ounces in the second quarter of 2026 from ore grading above 10 grams per tonne, which is high by industry standards. Segovia is also unusual in how it sources ore. Alongside its own underground development, Aris buys ore from formalized local small-scale miners working within its titles and processes it through the company plant, an arrangement that adds volume without the full capital cost of developing every heading itself. Marmato is the growth story: a 5,000 tonne per day carbon-in-pulp plant tied to the Lower Mine is under construction, with first gold targeted for the fourth quarter of 2026. Beyond the two producing assets sit the Soto Norte joint venture in Santander, the Toroparu project in Guyana, and exploration ground in Canada.

Full ARIS guide

Select Water Solutions, Inc. (NYSE: WTTR) provides sustainable water and chemical solutions to the energy industry across major U.S. shale basins. It runs three segments: Water Infrastructure (permanent and semi-permanent pipelines, recycling, and disposal assets under longer-term contracts), Water Services (water transfer, flowback, well testing, fluids hauling, and containment for E&P operators), and Chemical Technologies (production and completion chemistry). The company manages billions of barrels of produced water annually and positions its recycling and treatment capabilities as an answer to tightening water-sourcing and disposal constraints in basins like the Permian.

Full WTTR guide

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

• ARIS drivers: The Marmato Lower Mine plant coming online; Segovia throughput and grade.
• WTTR drivers: Water Infrastructure buildout; Margin expansion and mix shift.

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: Concentration is the defining risk: essentially all current production is in Colombia, which brings permitting delays, community and security issues, informal and illegal mining activity around the titles, tax and royalty changes, and peso volatility. For WTTR, wTTR's revenue is tied to U.S.

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 ARIS if you believe its drivers more; WTTR 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 ARIS and WTTR guides.

ARIS. The valuation is built on earnings that inflected sharply: full-year 2025 net income was roughly $78 million and the trailing twelve month figure is roughly $285 million, so the trailing multiple is measuring a very recent step change rather than a settled run rate. A forward P/E near 7 and EV/EBITDA near 5 sit below where larger, more geographically diversified gold producers typically trade, which is the market pricing Colombian concentration and construction risk. The company pays no dividend and is directing cash into the Marmato build.

WTTR. In Q1 2026 WTTR beat estimates with ~$0.08 EPS and pushed gross margins above 30% for the first time. The trailing P/E has been reported in the 50 to 90+ range depending on the earnings metric, reflecting compressed recent net income against a stock that the market is pricing on future infrastructure growth. Valuation therefore leans heavily on EBITDA and the credibility of the raised infrastructure guidance rather than on trailing GAAP earnings.

Headline figures (approximate, August 2026): ARIS shows revenue (ttm) ~$1.27 billion, net income (ttm) ~$285 million, EPS ~$1.38, market cap ~$3.6 billion, p/e (trailing / forward) ~12.6 / ~7.0; WTTR shows revenue (q1 2026) ~$366M, revenue (ttm) ~$1.5B, adjusted ebitda (q1 2026) ~$77.6M, net income (q1 2026) ~$9.4M.

ARIS and WTTR 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 ARIS and WTTR exposure against your real portfolio. It is not an investment adviser.