Constellation Energy Corporation

What they do

Constellation owns and operates generating capacity that is primarily nuclear, natural gas, wind, solar and hydroelectric, and sells electricity, natural gas and related energy products to utilities, municipalities, cooperatives, and commercial, industrial, public sector and residential customers. Its 10-K reports five reportable segments: Mid-Atlantic, Midwest, New York, ERCOT, and Other Power Regions. At December 31, 2025, owned generating resources totaled 31,676 MW, before the roughly 23 GW Calpine fleet acquired in January 2026.

Revenue drivers

• Competitive generation (Mid-Atlantic, Midwest, New York, ERCOT, Other Power Regions) — The five reportable segments earn revenue by selling electricity and capacity from owned nuclear, natural gas, hydro, wind and solar generation into wholesale power markets; full-year 2025 revenue was $22.66B against $18.96B in 2024.
• Nuclear fleet and long-term PPAs — The emissions-free nuclear fleet is the core of the portfolio and is increasingly contracted to corporate buyers, including a 20-year PPA with Microsoft for the Crane Clean Energy Center and a 20-year PPA with Meta for Clinton beginning June 2027.
• Competitive retail supply — Constellation is a leading competitive retail supplier serving approximately 2.5 million customer accounts, including three-fourths of the Fortune 100; the Calpine acquisition added approximately 62 TWhs of annual retail load and roughly 2,500 employees.
• Calpine natural gas, geothermal and storage fleet — Calpine added approximately 23 GWs across 72 generation and battery storage assets concentrated in Texas, California and the Northeast, complementing the nuclear fleet's baseload output with dispatchable intermediate and peaking capacity.

Recent performance

Second-quarter 2026 operating revenues were $7,504M versus $6,101M in the second quarter of 2025, and six-month 2026 revenues were $18,626M versus $12,889M a year earlier. Q2 2026 GAAP net income attributable to common shareholders was $513M, or $1.42 per diluted share, down from $839M and $2.67 in Q2 2025, while Adjusted (non-GAAP) Operating Earnings rose to $2.55 per share from $1.91. Operating income fell to $580M in Q2 2026 from $951M a year earlier, with higher purchased power and fuel ($4,023M versus $3,132M) and higher interest expense ($283M versus $118M). Six-month 2026 net income attributable to common shareholders was $2,103M, or $5.88 per diluted share, versus $957M and $3.05 in the prior-year period.

Strategy

Management is integrating Calpine to capture value from the expanded fleet and a differentiated customer-facing business, and describes a disciplined capital allocation approach supported by what it calls a strong balance sheet. The company is advancing the restart of the Crane Clean Energy Center, renamed from Three Mile Island Unit 1, targeting operations in 2027 under a 20-year Microsoft PPA, and in July 2026 FERC approved transferring capacity interconnection rights and the NRC approved a fuel license for the plant. It is extending the lives of existing nuclear assets, including license renewal applications for two New York nuclear units, and signing long-term PPAs: an additional 920 MW of 15-20 year agreements beginning 2029 through 2032, including 176 MW with Walmart supporting a 30 MW expansion at Dresden. Constellation is also satisfying regulatory commitments from the Calpine deal through divestitures, with the agreement to sell the 606 MW Brazos Valley Energy Center in ERCOT to LS Power for $860 million before closing adjustments described as the last required asset sale.

Risks

• Market and fuel price exposure — Results depend on the price and availability of fuels, generation resources in the markets served, and power market design, all of which are outside the company's direct control.
• Calpine integration and dilution — The 10-K cites integration challenges in a complex and costly process, potential unknown liabilities, possible loss of key employees and customers, reduced ownership and voting power for current shareholders, and potential EPS dilution from the $22 billion acquisition.
• Regulatory and licensing risk — Operations depend on renewal of operating licenses, retirement or repowering approvals, market design, environmental and climate policy, and tax policy, including the approvals still needed for the Crane restart.
• Operational and cybersecurity risk — As an owner-operator of generation facilities and a commodities trading participant, the company faces safe and secure operation risks, nuclear decommissioning obligations, and physical, cybersecurity and third-party reliability risks.

Outlook

Management raised its full-year 2026 Adjusted (non-GAAP) Operating Earnings guidance range to $11.50-$12.50 per share. The company said it remains focused on integrating Calpine, capturing the value of the expanded fleet, and investing in opportunities that generate attractive returns. It points to a strong balance sheet, a differentiated customer-facing business, and a generation portfolio positioned for growing demand for reliable energy.