Key Points
Bloom Energy provides on-site fuel cell technology that serves high-growth industries like artificial intelligence and data centers.
Constellation Energy is the largest producer of carbon-free nuclear power in the United States with a massive utility-scale footprint.
Which energy stock is the better choice for your 2026 portfolio?
As the race to power energy-hungry data centers accelerates, should you bet on hydrogen-ready fuel cells or nuclear power? Here is how Bloom Energy (NYSE:BE) and Constellation Energy (NASDAQ:CEG) compare today.
These two firms operate at the heart of the clean energy transition. While one focuses on decentralized power through fuel cell innovation, the other leverages a massive fleet of carbon-free nuclear plants. Comparing them helps you weigh the potential for explosive growth against the reliability of established utility-scale generation.
The case for Bloom Energy
Bloom Energy manufactures solid oxide fuel cell systems that generate electricity and hydrogen on-site without traditional combustion. The company serves a diverse range of clients across the industrial stocks sector, specifically focusing on data centers and semiconductor manufacturers. Major commercial agreements include a strategic partnership with American Electric Power (NASDAQ:AEP) and a multi-billion dollar financing framework with Brookfield Corp. (NYSE:BN) to support large-scale energy projects.
In FY 2025, revenue reached about $2 billion, which represents a significant 37% increase compared to the previous year. Despite this rapid top-line expansion, the company reported a net loss of approximately $88.4 million for the same fiscal period. This result reflects a substantial improvement over the $302 million net loss from FY 2023 as the company scales manufacturing to meet rising demand.
As of its December 2025 balance sheet, the company carries a debt-to-equity ratio of around 3.9x. This ratio compares total debt to shareholder equity, and a higher number indicates that a business relies more heavily on borrowed funds than on internal capital. Its current ratio is roughly 6.0x, while free cash flow reached about $57.2 million, which is calculated as operating cash flow minus capital expenditures.
The case for Constellation Energy
Constellation Energy operates as a massive power producer and retail energy supplier with a total capacity of approximately 55 gigawatts. The company recently finalized a landmark 20-year agreement with Microsoft Corp. (NASDAQ:MSFT) to support a significant nuclear reactor restart, highlighting its role in providing reliable energy to large technology firms. It serves roughly 2.5 million customer accounts, including three-fourths of the Fortune 100 and a large base of residential users.
In its latest annual report, filed for FY 2025, revenue reached approximately $25.5 billion. This figure represents growth of more than 8% over the prior year. Net income reached about $2.3 billion, which translates to a net margin of roughly 9%. This net margin reflects the portion of total revenue that remains as profit after the company pays all of its operating and financial costs.
As of its December 2025 balance sheet, the company carries a debt-to-equity ratio of approximately 0.6x. This lower ratio suggests a more conservative capital structure than many of its peers in the utility sector. Its current ratio is roughly 1.5x, and free cash flow for the year was about $1.3 billion, which is calculated as cash flow from operations minus capital expenditures.
Risk profile comparison
Bloom Energy faces competition from traditional utilities and other fuel cell manufacturers. The business relies on government incentives like the federal Investment Tax Credit, meaning political shifts could hurt its long-term outlook. It also manages supply chain vulnerabilities for critical components and is involved in legal proceedings regarding its reliance on materials sourced from abroad.
Constellation Energy is exposed to fluctuations in commodity prices for its unhedged power generation and competition from other providers like NextEra Energy (NYSE:NEE). The company must also navigate the operational risks of integrating large acquisitions while maintaining aging nuclear infrastructure. Additionally, it faces ongoing regulatory oversight regarding its asset portfolio and potential cybersecurity threats to the national energy grid.
Valuation comparison
Constellation Energy currently trades at a lower valuation relative to its sales and future earnings estimates than the high-growth premium assigned to Bloom Energy. The Forward P/E ratio compares a stock price to its expected profit based on future earnings estimates. The P/S ratio measures the market value of the company against its sales over the past twelve months.
| Metric | Bloom Energy | Constellation Energy |
|---|---|---|
| Forward P/E | 85.4x | 22.5x |
| P/S ratio | 21.9x | 3.1x |
Valuation metrics are sourced from Financial Modeling Prep (FMP) and may differ from other data providers.
Which stock would I buy in 2026?
Bloom is growing fast and is an exciting business, given the increasing demand for local power sources coming from the AI data center explosion. Transmission capacity deficits and extended lead times for needed electrical infrastructure mean utility interconnection times are now between four and seven years for hyperscalers' new data centers. Bloom is successfully positioning its solid oxide fuel cell technology as an alternative that can be quickly put in place to be used as a bridge or as a permanent source of onsite power generation.
Bloom Energy's core product is its Energy Server, a stand-alone power source for commercial and industrial customers. The Energy Server is based on solid oxide fuel cell technology and runs on natural gas, biogas, or hydrogen.
The business aims to reduce its production costs by about 10% per year to attract more customers (its main markets are the U.S. and Korea). The AI data center boom is a tailwind for Bloom, which should see revenue leap 85% to $4.1 billion in fiscal 2026. That has Wall Street expecting a swing to net income of about $658 million.
Interest in nuclear power equities initially surged at the decade's start as a key component of decarbonization strategies. More recently, however, the massive electricity requirements of artificial intelligence have rapidly accelerated growth across the sector. As America's leading operator of nuclear facilities--alongside its wind, solar, and hydroelectric assets--Constellation Energy is uniquely positioned to capitalize on this surge in power consumption, evidenced by a 2025 20-year agreement with Meta Platforms (NASDAQ:META). Surging load requirements, combined with state-level regulations phasing out coal generation, are driving momentum to reactivate retired reactors and construct new facilities nationwide.
That has the once-stodgy utility provider looking at a big jump in revenue this fiscal year, to $26.1 billion from $25.5 billion. Net income will come close to doubling, to around $4.5 billion this year as well.
Growth like Constellation's is hard to overlook. Bloom's history as a boom-and-bust stock should bring some caution too. Constellation's much more reasonable P/E and P/S ratios make it the pick for long-term investors seeking an energy play on AI-driven demand.
Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Bloom Energy, Brookfield Corporation, Constellation Energy, Meta Platforms, Microsoft, and NextEra Energy. The Motley Fool has a disclosure policy.