Key Highlights

  • Constellation Energy is the clearest pure-play on the AI-power thesis, the largest US nuclear operator with roughly 31,676 megawatts of capacity.
  • Hallador Energy is the only unprofitable name in the group, an Indiana coal producer and power operator centered on its Merom Generating Station.
  • Global Water Resources and Artesian Resources are both small-cap water utilities, trading around $251 million and $370 million in Market Value respectively.
  • Alliant Energy delivers regulated electricity and Natural Gas across Iowa, Wisconsin and neighboring states, with growing data-center load.

For most of the past two decades, utilities were where investors parked cash for the Dividend and stopped thinking about it. That has changed. The catalyst is electricity itself: after years of flat demand, US power consumption is climbing again, pushed by data centres, electrification and a domestic Manufacturing build-out.

That backdrop ties together five companies that otherwise share almost nothing. Global Water Resources (NASDAQ:GWRS), Alliant Energy (NASDAQ:LNT), Constellation Energy (NASDAQ:CEG), Artesian Resources (NASDAQ:ARTNA) and Hallador Energy (NASDAQ:HNRG) span water, regulated electricity, nuclear generation and coal-to-gas power. All five trade on the Nasdaq, so all sit within the Nasdaq Composite. Read together, they offer a useful cross-section of how Capital spending, regulation and AI-era Demand are reshaping a sector once known for putting investors to sleep.

The Demand Story Reshaping American Power

The numbers behind the theme are concrete. The US Energy Information Administration's latest Short-Term Energy Outlook projects electricity sales of roughly 4,135 billion kilowatt-hours in 2026 and 4,211 billion in 2027, records in both years. The EIA credits the growth to data-centre development and rising commercial and industrial manufacturing activity, and it names the West South Central region as the largest single contributor to sales growth even after some Texas interconnection pauses.

The generation mix tells the second half of the story. For 2026 the EIA models natural gas at about 40% of US generation, nuclear near 18%, coal around 16% (slipping toward 14% by 2027), wind near 11% and solar about 8%. That mix explains why nuclear operators, gas-turbine buyers and even coal plants with firm capacity value are suddenly relevant again.

Analytically, three forces run through every name below. First, demand growth tightens power markets and raises the value of firm, dispatchable capacity. Second, meeting that demand requires enormous capital, rate cases for regulated utilities, balance-sheet risk for merchant generators. Third, interest rates still matter: these are capital-intensive businesses whose dividends compete with bonds. The five companies express those forces very differently.

Global Water Resources (NASDAQ:GWRS): The Small-Cap Arizona Water Bet

Global Water Resources, Inc. (NASDAQ:GWRS) is the smallest name here, a regulated water, wastewater and recycled-water company operating around the Phoenix and Tucson metros. According to aggregator data, the stock traded near $8.71 in mid-September 2026 with a Market Capitalisation around $251 million and a Dividend Yield of roughly 3.5%.

The Investment case is straightforward growth. In its Q2 2026 report (12 August 2026), Global Water posted Revenue of $17.8 million, up 24.8% year over year, Net Income of $2.7 million, or $0.10 per diluted share, and active connections up 5.8% to 69,429. Population growth in its Arizona service territories drives organic connection gains, supplemented by Tucson-area acquisitions.

Two catalysts stand out. The company filed a rate settlement seeking a $2.3 million annual revenue increase for its GW-Santa Cruz subsidiary, and in June it filed to expand its assured-water-supply designations, a meaningful hurdle in arid Arizona. On 1 September it added roughly $20 million of liquidity. The obvious risk: drought, water-rights politics and rate-case outcomes can all bite a company this size. Its unusual monthly dividend, however, keeps income investors interested.

Alliant Energy (NASDAQ:LNT): Regulated Electricity Meets Data-Centre Load

Alliant Energy Corporation (NASDAQ:LNT) is the classic regulated Utility in the group, delivering electricity and natural gas across Iowa, Wisconsin and neighbouring states through subsidiaries including Interstate Power and Light. Aggregator data put the shares near $67 in mid-September 2026, with a market cap around $17.4 billion and a dividend yield near 3.2%. Alliant has paid dividends since 1946 and is an S&P 500 Dividend Aristocrat.

The story here is load growth. In its Q1 2026 results Alliant said it had signed roughly 370 megawatts of new electric-service agreements, lifting total contracted data-centre demand to about 3.4 gigawatts across its territories. In its Q2 report (30 July 2026) it reiterated a striking projection of roughly 60% load growth by 2031 and reaffirmed 2026 ongoing Earnings guidance of $3.36 to $3.46 per share. GAAP EPS for the quarter was $0.65 on revenue of $971 million.

Analytically, Alliant is a bet that data centres arriving in the Upper Midwest translate into rate-base growth, new generation and grid investment that regulators allow the utility to earn a return on. The risks are execution and regulation: rate cases, financing costs and the chance that some announced data-centre demand slips or fails to materialise.

Constellation Energy (NASDAQ:CEG): The Nuclear Heavyweight of the AI Trade

Constellation Energy Corporation (NASDAQ:CEG) is the marquee name and the clearest pure-play on the AI-power thesis. As the largest US operator of nuclear plants and an independent power producer with roughly 31,676 megawatts of capacity, it has become a favourite proxy for data-centre electricity demand. Aggregator data showed the stock near $285 in mid-September 2026, with a market cap around $101 billion and trailing revenue of about $31.3 billion.

The 2026 news flow has been dense. Second-quarter results (6 August 2026) delivered adjusted operating earnings of $2.55 per share, up from $1.91 a year earlier, and management raised full-year guidance to $11.50–$12.50, citing the addition of Calpine and favourable market conditions. The same day, Constellation announced 920 megawatts of long-term nuclear power-purchase agreements and agreed to sell the Brazos Valley Energy Center to LS Power for $860 million. In June it signed a long-term deal to Supply Walmart roughly 176 megawatts from its Dresden Clean Energy Center, and on 10 September it agreed to buy Shell's 609-megawatt Rhode Island State Energy Center for $715 million.

The bull case is clear: scarce, carbon-free, always-on power commands premium contracts. The bear case is valuation, execution on a fast-growing Acquisition pipeline, and any softening of the data-centre narrative.

Artesian Resources (NASDAQ:ARTNA): Steady Water Compounding on the Delmarva Peninsula

Artesian Resources Corporation (NASDAQ:ARTNA) is the other small-cap water utility here, serving customers across Delaware, Maryland and Pennsylvania, largely the Delmarva Peninsula. Aggregator data put the shares near $36 in mid-September 2026, with a market cap around $370 million, trailing EPS of about $2.28 and a dividend yield near 3.6%.

Artesian's appeal is consistency rather than fireworks. Full-year 2025 results (reported 12 March 2026) showed net income of $22.8 million, up 11.9%, and diluted EPS of $2.21, up 11.6%, on revenue of $112.9 million. Q1 2026 (5 May 2026) continued the trend: EPS rose 7.5% to $0.57, net income climbed 9.2% to $5.9 million, and revenue grew 7.3% to $27.8 million. Alongside those results the board approved a 2% dividend increase to an annualised $1.2796 per share, its 134th consecutive quarterly payout.

Two structural themes matter. Capital spending is heavy, at $13.1 million in Q1 alone, much of it for infrastructure and PFAS-treatment upgrades as the "forever chemicals" rules tighten. Those investments feed the rate base but require regulatory recovery. For income-focused investors, Artesian is a slow, dividend-driven compounder; its risk is that rising capital costs outrun what regulators allow.

Hallador Energy (NASDAQ:HNRG): A Coal Producer Betting on Firm Power

Hallador Energy Company (NASDAQ:HNRG) is the wild card, an Indiana-based independent power producer and coal company centred on the 1,080-megawatt Merom Generating Station. Aggregator data showed the shares near $15 in mid-September 2026, with a market cap around $723 million. This is the only unprofitable name in the group: trailing EPS was roughly negative, and Q2 2026 (10 August 2026) brought revenue of $101.5 million and a net loss of $15.2 million.

The thesis is a pivot. Hallador is repositioning from a coal miner into a firm-power supplier as demand growth revalues dispatchable capacity. It secured a 12-year capacity agreement in early 2026 that it says carries more than $1 billion of contracted revenue through 2040, and a separate three-year deal at record pricing worth roughly $86 million. It is also building out gas generation, buying $350 million of Siemens turbines in June for its Turtle Creek project (targeting commercial operation in the second half of 2028) and winning up to $27.2 million in potential Department of Energy funding to modernise Merom.

The reward is Leverage to tight power markets; the risk is a leveraged, currently loss-making Balance Sheet executing a costly transition.

What Investors Should Watch

Several concrete catalysts run through autumn 2026 and into 2027. For the regulated names, Alliant, Global Water and Artesian, rate cases are the swing factor: watch the GW-Santa Cruz settlement, Artesian's PFAS-driven capital recovery, and Alliant's filings tied to its data-centre load pipeline. For Alliant specifically, the key test is whether that roughly 3.4 gigawatts of contracted data-centre demand converts into actual, earning rate base.

For Constellation, the questions are execution on the RISEC acquisition, the pace of new contracts, and whether raised guidance holds. For Hallador, watch Turtle Creek's budget and 2028 timeline, plus any move from loss back toward profit. Across all five, macro matters: the EIA's demand trajectory, interest rates, and whether the AI-data-centre buildout keeps its momentum.

Electricity Demand Reshapes a Sleepy Sector

Sized up together, these five Nasdaq-listed companies do not belong to a single trade. Constellation is an AI-power growth story at scale; Alliant is regulated electricity levered to Midwest load growth; Hallador is a high-risk transition play; and Global Water and Artesian are small-cap water compounders driven by population growth, dividends and infrastructure spending.

The common thread is electricity demand rising for the first time in a generation, with capital, regulation and technology all being reorganised around that fact. That makes utilities and power a genuine story to watch in September 2026, not because the sector is exciting, but because it has quietly become essential.