AWK vs SBS: 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. AWK and SBS 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 AWK and SBS 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.

American Water Works is the largest publicly traded, regulated water and wastewater utility in the United States, serving roughly 14 million people through regulated operations in 14 states plus 18 military installations. Its business model is classic rate-base utility economics: the company invests heavily in pipes, treatment plants, and water systems, then earns an allowed regulated return on that invested capital once state utility commissions approve rate cases. Growth comes from two levers, ongoing infrastructure spending and acquisitions of small municipal and investor-owned water systems that fold into its existing footprint.

Full AWK guide

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

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

• AWK drivers: Rate-base growth and capital investment; Acquisitions of municipal and small water systems.
• SBS drivers: The post-privatization efficiency reset; The ARSESP tariff framework and universalization targets.

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: The biggest risk is regulatory: earnings depend on state utility commissions approving rate cases at constructive returns, and regulatory lag (the gap between when capital is spent and when rates are allowed to recover it) can pressure results. For SBS, 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.

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

AWK. AWK typically trades at a premium P/E to the broader market, reflecting its regulated, low-volatility earnings and long runway of rate-base growth. In the first quarter of 2026 revenue rose year over year to about $1.21 billion while adjusted EPS was roughly $1.01 (versus about $1.02 a year earlier), and management reaffirmed full-year 2026 EPS guidance of about $6.02 to $6.12. The dividend yields roughly 2.5-2.8%, modest in absolute terms but growing near the top of the utility peer group.

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.

Headline figures (approximate, JULY 2026): AWK shows market cap ~$26 billion, share price ~$135, q1 2026 revenue ~$1.21 billion, q1 2026 adjusted eps ~$1.01; 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.

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