SBS vs WTRG: 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: SBS 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. SBS and WTRG 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 SBS and WTRG 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.

Companhia de Saneamento Basico do Estado de Sao Paulo, known as Sabesp, treats and distributes drinking water and collects and treats sewage across roughly 375 municipalities in the state of Sao Paulo, serving on the order of 28 million people. Almost all of its revenue is regulated tariff revenue billed to residential, commercial, industrial and public customers, with a smaller wholesale component where Sabesp sells treated water to municipalities that run their own local distribution. The asset base is physical and long-lived: reservoirs, treatment plants, tens of thousands of kilometres of mains and collectors, and the metering and billing infrastructure that sits on top. The economics look like a classic regulated utility, with volumes that barely move year to year, revenue set by a tariff formula rather than by pricing power, and returns that depend on how much capital the regulator lets the company deploy and earn on.

Full SBS guide

Essential Utilities, based in Bryn Mawr, Pennsylvania and formerly known as Aqua America, is one of the largest publicly traded regulated water and wastewater companies in the United States. Through its Aqua brand it serves roughly 5.5 million water and wastewater customers across nine states, and through its Peoples brand it delivers natural gas to about 747,000 customers concentrated in western Pennsylvania. Earnings come almost entirely from regulated rates, so growth is driven by heavy infrastructure spending (about $1.4 billion invested in 2025) that expands the rate base regulators allow it to earn a return on.

Full WTRG guide

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

• SBS drivers: The post-privatization efficiency reset; The ARSESP tariff framework and universalization targets.
• WTRG drivers: Pending American Water merger; Rate-base growth from infrastructure spending.

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 and political risk is the dominant exposure: tariffs, subsidy rules and the concession terms are set by a state regulator and can be revisited by future administrations, and the State of Sao Paulo still holds roughly 18 percent of the company alongside special governance rights. For WTRG, the largest single risk is merger-specific: if remaining regulatory approvals are delayed, conditioned, or denied, WTRG would revert to trading on its standalone fundamentals, and the merger agreement carries termination fees ($370 million potentially payable by Essential, $835 million by American Water under specified circumstances).

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 SBS if you believe its drivers more; WTRG 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 SBS and WTRG guides.

SBS. All primary reporting is in Brazilian reais and converts to US dollars only at the ADR level, so headline dollar figures move with the exchange rate as well as with operations. The trailing profit figure benefits from post-privatization cost reduction that started in 2024, which makes year-over-year comparisons flattering relative to a normalised run rate. Because the company is in a heavy investment phase, earnings and free cash flow diverge, and the regulated asset base is often more informative about the earning power being built than a single year of net income.

WTRG. WTRG trades like a regulated utility, valued on stable earnings and its dividend rather than rapid growth, and full-year 2025 revenue rose about 19 percent to roughly $2.5 billion, helped by rate recoveries and higher gas costs. With the American Water merger approved by shareholders, the stock's valuation increasingly reflects the fixed 0.305 exchange ratio and the roughly Q1 2027 expected close. Reported quarterly EPS can swing on non-recurring items and merger-related expenses, so headline comparisons should be read carefully.

Headline figures (approximate, August 2026): SBS shows revenue (ttm) ~R$34.7 billion Brazilian reais (roughly ~US$6.4 billion), net income (ttm) ~R$7.2 billion Brazilian reais (roughly ~US$1.3 billion), market capitalization ~R$102 billion Brazilian reais (roughly ~US$19 billion), adjusted ebitda (q1 2026) ~R$3.8 billion, up ~26% year over year; WTRG shows revenue (fy2025) ~$2.5B, net income (fy2025) ~$616M, eps (fy2025) ~$2.20, market cap ~$11B.

SBS and WTRG 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 SBS and WTRG exposure against your real portfolio. It is not an investment adviser.