AWK vs CMS: How American Water Works and CMS Energy Corporation Compare (2026)

Last updated July 2026

Short answer

AWK and CMS are similarly sized, but CMS trades noticeably cheaper on forward earnings (17.88x vs 21.07x): the market is paying up for AWK's profile and pricing CMS more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.

AWK vs CMS: the tie-breaker metrics

Same yardstick, side by side (as of July 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.

Metric	AWK	CMS	What it tells you
Market cap	$27.01B	$22.98B	Size. The larger name is the incumbent; the smaller has more room to grow and more to prove.
Forward P/E	21.07	17.88	Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up.
Trailing P/E	24.48	20.60	Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price.
Price vs 52-week range	65% of range	49% of range	Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why.
Price / book	2.45	2.49	How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price.

Reading it: CMS 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.

Before you buy: how AWK and CMS affect your concentration

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 CMS 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 CMS 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.

What does American Water Works (AWK) do?

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

What does CMS Energy Corporation (CMS) do?

CMS Energy Corporation is a holding company headquartered in Jackson, Michigan, whose principal business is Consumers Energy, one of the largest regulated combination utilities in the country, delivering electricity and natural gas to roughly 6.7 million of Michigan's 10 million residents. The company also runs a smaller non-utility enterprise segment (NorthStar Clean Energy) involved in independent power and renewable projects. Because the vast majority of earnings come from rate-regulated operations, CMS Energy's profit is driven largely by the rate base it invests in and the returns approved by the Michigan Public Service Commission.

Full CMS guide

AWK vs CMS: how do they differ?

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.
CMS drivers: Rate-base and capital plan growth; Clean energy transformation.

Which fits which kind of investor

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 CMS, as a capital-intensive regulated utility, CMS Energy carries substantial debt and is sensitive to interest rates, which raise financing costs and can weigh on the share price and valuation.

AWK or CMS: which should you pick?

Pick AWK if you believe its drivers more; CMS 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 CMS guides.

AWK vs CMS: the full fundamentals

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.

CMS. CMS Energy trades at a premium utility multiple in the low-20s times earnings, reflecting its consistent regulated growth and long dividend record. In Q1 2026 the company reported operating revenue of about $2.73 billion and adjusted EPS of $1.13, beating estimates, and reaffirmed full-year guidance. Valuation and yield tend to move with interest rates, so the stock often behaves more like a bond-proxy than a cyclical name.

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; CMS shows market cap ~$24 billion, revenue (ttm) ~$8 billion, 2026 adjusted eps guidance ~$3.83 to $3.90, p/e ratio (trailing) ~21x.

The bottom line: AWK vs CMS

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

Investing in American Water Works with AI

Connect the broker you already use and ask Walnut's AI how AWK fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.

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FAQ

What is the difference between AWK and CMS?

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. CMS Energy Corporation is a holding company headquartered in Jackson, Michigan, whose principal business is Consumers Energy, one of the largest regulated combination utilities in the country, delivering electricity and natural gas to roughly 6.7 million of Michigan's 10 million residents. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.

Is AWK or CMS the better stock?

Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.

Which is cheaper, AWK or CMS?

On forward P/E (as of July 2026), AWK trades at 21.07x and CMS at 17.88x, so CMS is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.

Should you own both AWK and CMS?

Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.

What are the risks of AWK vs CMS?

AWK: 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. As a capital-intensive utility carrying substantial debt, AWK is sensitive to interest rates, which raise financing costs and can compress the valuation multiple. The pending Essential Utilities merger adds integration and approval risk, and could be delayed or altered by remaining regulators. Weather, drought, and water-quality or environmental compliance costs can also affect a given period. Finally, the stock often trades at a premium valuation, so disappointing rate outcomes or higher-for-longer rates can weigh on the shares. CMS: As a capital-intensive regulated utility, CMS Energy carries substantial debt and is sensitive to interest rates, which raise financing costs and can weigh on the share price and valuation. Earnings depend heavily on constructive decisions from the Michigan Public Service Commission on rate cases and allowed returns, and unfavorable outcomes could pressure results. Execution on the large clean-energy capital plan carries cost, permitting, and supply-chain risk, and severe weather events can drive storm restoration costs and reliability scrutiny. Concentration in a single state means Michigan's economy, regulation, and weather have an outsized effect, and slower-than-expected large-load growth would reduce a key upside driver.

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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell AWK or CMS; figures are approximate and dated (as of July 2026). Verify current data before investing.