Constellation
Constellation Energy Corporation is the largest U.S. electricity producer with 55 GW of nuclear, gas, geothermal, and solar capacity, serving 2.5 million retail and enterprise customers across 16 states plus D.C. via wholesale markets, long-term PPAs, and direct-to-consumer residential supply.
- Company typePublic
- Founded2022
- HeadquartersBaltimore, United States
- Headcount5,001–10,000
- GTM typeB2B and B2C
- OfferingServices
What Constellation does
Constellation Energy Corporation (NASDAQ: CEG), headquartered in Baltimore, Maryland, is the nation's largest electricity producer following its January 2026 $26.6 billion acquisition of Calpine Corporation. The company was formed in 2022 when Exelon Corporation separated its competitive generation and retail businesses into an independent publicly traded entity. Post-Calpine, Constellation operates 55 GW of generation capacity spanning nuclear, natural gas, geothermal, and solar assets, serving 2.5 million retail and business customers across 16 states plus Washington D.C. via wholesale markets (PJM, ERCOT, CAISO), long-term power purchase agreements, and direct-to-consumer retail supply in deregulated markets.
The company's core technology centers on zero-emission nuclear baseload generation, with major facilities including the Crane Clean Energy Center (835 MW Three Mile Island Unit 1 restart targeting 2027), Dresden, Ginna, and Nine Mile Point nuclear plants, supplemented by Calpine's natural gas combined-cycle, geothermal (The Geysers complex), and solar-plus-storage assets. Revenue is generated through multiple streams: wholesale electricity generation, retail electricity and natural gas supply (fixed-rate and variable-rate plans in deregulated markets), long-term enterprise PPAs, hourly carbon-free energy matching services, renewable natural gas commodity sales, and sustainability products including RECs and carbon offsets. Pricing models include subscription-based residential supply, annual enterprise PPA billing, and transaction-fee RNG sales.
Constellation's go-to-market operates across three distinct motions: enterprise field sales securing multi-gigawatt hyperscaler PPAs (Microsoft, Meta, Google, Walmart, CyrusOne), direct-to-consumer online enrollment via constellation.com for residential customers in deregulated states, and commercial/small business sales supported by the Constellation Navigator platform. The company's strategy is anchored to the AI-driven data center demand surge, with multiple flagship PPAs signed in 2026-2026 to serve hyperscaler power needs, alongside active nuclear license renewal filings to extend baseload capacity through 2049-2051.
Constellation firmographics
Firmographics- Name
- Constellation
- Legal name
- Constellation Energy Corporation
- Website
- https://constellation.com
- Company type
- Public
- Founded year
- 2022
- Operating status
- Operating
- Headcount range
- 5,001–10,000 employees
- Short description
- Constellation Energy Corporation is the largest U.S. electricity producer with 55 GW of nuclear, gas, geothermal, and solar capacity, serving 2.5 million retail and enterprise customers across 16 states plus D.C. via wholesale markets, long-term PPAs, and direct-to-consumer residential supply.
- Ownership category
- akta.pro rank
Constellation industry classification
Industry- Product category
- Electricity Generation and Retail Energy Supply
- NAICS
- Electric Power Generation, Transmission and Distribution (2211), Electric Power Generation (22111), Electric Power Distribution (221122), Electric Power Transmission, Control, and Distribution (22112), Solar Electric Power Generation (221114), Fossil Fuel Electric Power Generation (221112)
- SIC
- Natural Gas Transmisison & Distribution (4923), Natural Gas Distribution (4924)
- akta.pro primary industry
- Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)
- akta.pro secondary industries
- PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC), Solar Balance-of-System Components (Cables, Combiner Boxes, Switchgear, Transformers) (EUAMABAG), Transmission & Distribution Line Equipment (Bushings, Insulators, Arresters, Conductors, Hardware) (IMAGAAAF)
Keywords
Where Constellation is headquartered
LocationHeadquarters
- HQ city
- Baltimore
- HQ country
- United States
- HQ region
- North America
Offices6 records
Markets served
Constellation business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Electricity Generation and Sales: Constellation generates electricity from nuclear, natural gas, and geothermal sources and sells power through wholesale markets, retail contracts, and long-term power purchase agreements. The company serves 2.5 million retail and business customers across 16 states plus DC.
- Carbon-Free Energy Matching Services: Hourly carbon-free energy matching services for corporate customers, leveraging the always-on nuclear fleet to provide consistent, verifiable clean energy on an hourly basis. Revenue derived from premium pricing for enhanced sustainability offerings.
- Renewable Natural Gas (RNG): Constellation owns equity interests in RNG production facilities and markets RNG production and environmental attributes to customers seeking gas decarbonization products. Revenue from RNG commodity sales and environmental attribute monetization.
- Residential Energy Supply: Residential electricity and natural gas supply in deregulated markets. Customers pay competitive supply rates plus applicable utility delivery charges. Includes fixed-rate and variable-rate plans, EV electricity plans, and renewable energy options.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Fixed-Rate Electricity Plans |
| Usage-based | Monthly | Variable-Rate Electricity Plans |
| Subscription | Annual | Hourly Carbon-Free Energy Matching |
| Subscription | Monthly | Wyoming Natural Gas Plans |
| Subscription | Annual | Enterprise Power Purchase Agreements |
Go-to-market motion3 records
Distribution channels6 records
Marketing channels9 records
Constellation product offering
Product offeringCore offering
Constellation generates and supplies electricity and natural gas to residential, commercial, and enterprise customers across 16 U.S. states and Washington D.C. The company offers fixed-rate and variable-rate supply plans, plus renewable and nuclear energy plans, EV charging plans, smart home services, and home protection plans. Following the January 2026 Calpine acquisition, Constellation operates 55 GW of generation capacity including nuclear, natural gas, geothermal, solar, and battery storage assets, and is the largest electricity producer in the United States.
Product overview
Constellation is an energy supply company offering a comprehensive portfolio of electricity and natural gas products and services to residential, commercial, and small business customers across 16 states and Washington D.C. The company's core offerings include fixed-rate and variable-rate electricity and natural gas supply plans, supplemented by clean energy options such as nuclear energy plans, renewable energy plans (wind and solar), and solar installations. For residential customers, Constellation provides add-on services including EV plans and charger installation, air conditioning protection plans, and smart home connectivity through Constellation Connect. Commercial customers access a broader suite through the Constellation Navigator platform, including sustainability solutions like carbon-free energy supply, hourly carbon-free matching, renewable energy certificates, carbon offsets, nuclear solutions suite, and renewable natural gas products. The company also serves emerging technology sectors with dedicated data center power solutions and flexible EV services. Following its January 2026 acquisition of Calpine Corporation, Constellation now operates as the nation's largest electricity producer with 55 GW of generating capacity, combining its zero-emission nuclear fleet with Calpine's natural gas and geothermal assets. Key facilities include the Crane Clean Energy Center (Three Mile Island restart), The Geysers geothermal complex, and multiple nuclear plants in New York and Illinois.
Differentiator
Problem solved
Functional benefit
Brands
- Calpine: A business unit of Constellation specializing in natural gas and geothermal power generation, operating The Geysers geothermal complex in California.
Products and services
- Residential Electricity Supply
Quantifiable outcome
- Crane Clean Energy Center to create 3,400 direct and indirect jobs, add $16 billion to Pennsylvania GDP, generate $3 billion in state and federal tax revenue
- +3 more outcomes
Companies that use Constellation
Customer profileNamed customers10 records
Segments5 records
Ideal customer profiles5 records
Constellation technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Constellation partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered flagship, minor, core and major.
- Walmartflagship15-year nuclear power purchase agreement for approximately 176 MW from Constellation's Dresden Clean Energy Center in Illinois, including 30 MW of expanded capacity through efficiency uprates. Terms begin 2029 and 2030. Supports Walmart's high-tech perishable distribution center in Belvidere, Illinois.
- Baltimore RavensminorBaltimore Ravens training camp sponsor at Under Armour Performance Center in Owings Mills, Maryland. Represents local community engagement for Baltimore-headquartered company.
- Pine Creek RNGcoreConstellation purchased minority equity interest in five operating Pine Creek RNG production facilities in Washington, Utah, Iowa, and Illinois producing 1.5 million MMBtus annually. Framework established to develop approximately 3 million additional MMBtus annually of RNG production.
- NVIDIAmajorCollaboration with NVIDIA and Emerald AI to pioneer flexible AI factories that can operate as grid assets. Uses NVIDIA's Vera Rubin DSX AI Factory reference design and Emerald AI's Conductor platform. Could unlock up to 100 GW of capacity across U.S. power system.
- Emerald AImajorPartner in AI factory initiative enabling facilities to both draw power from and support the grid. Emerald AI's Conductor platform coordinates computing workloads with on-site generation and storage, operating as flexible energy assets.
- CyrusOnemajor380 MW power agreement for CyrusOne data center adjacent to Freestone Energy Center in Texas, with exclusive agreement for additional 380 MW Phase 2. Combined total of over 1,100 MW contracted for CyrusOne's Texas data centers.
- Calpine CorporationflagshipConstellation completed $26.6 billion acquisition of Calpine from Energy Capital Partners, creating nation's largest electricity producer with 55 GW of generation capacity. Required antitrust divestitures including seven power plants. Combined entity serves 2.5 million customers.
- W. L. Gore & AssociatescoreAgreement for hourly carbon-free energy matching supplying approximately 110,000 MWh of clean energy annually with estimated 33,000 metric ton carbon footprint reduction through November 2026. Leverages Constellation's always-on nuclear fleet.
- TreehousecorePartnership to expand home EV charger installation services for electric vehicle owners across the U.S. Constellation technicians support installations primarily in Maryland; Treehouse handles installations outside the region using automation technology.
- LevelTen EnergycoreCo-founding member of Granular Certificate Trading Alliance with AES, Google, and Microsoft to advance hourly energy tracking infrastructure. First GC auctions scheduled for early 2025.
- Microsoftflagship20-year power purchase agreement for 835 MW from Crane Clean Energy Center (formerly Three Mile Island Unit 1) to power Microsoft's PJM data centers. Constellation is investing $1.6 billion to restart the reactor, with $1 billion DOE loan support. The project creates 3,000+ jobs and adds over $16 billion to Pennsylvania's GDP.
Scale indicators12 records
Recent moves7 records
Expansion highlights8 records
Constellation competitors and assessment
Company assessmentDirect peers
- Vistra Corp: Vistra is one of the largest U.S. independent power producers and retail electricity providers, operating nuclear, natural gas, coal, and solar generation and serving millions of retail customers across 20+ states. Directly comparable to Constellation as a competitor in merchant generation and competitive retail supply, with overlapping nuclear exposure (Vistra owns the Comanche Peak and Beaver Valley stakes plus post-Energy Harbor nuclear additions).
- NRG Energy: NRG is a major competitive retail electricity and natural gas supplier serving residential, commercial, and industrial customers across the U.S., with significant generation and battery storage assets. NRG competes head-to-head with Constellation in deregulated retail markets and increasingly in commercial carbon-free offerings, making it a close direct peer despite a smaller nuclear footprint.
- Talen Energy: Talen Energy is an independent power producer with a portfolio that includes nuclear (Susquehanna), natural gas, and coal assets, and it has been a vocal proponent of nuclear-powered data centers in PJM. Highly comparable to Constellation in merchant nuclear + gas generation strategy and in selling carbon-free power to hyperscalers.
Broad incumbents
- NextEra Energy: NextEra Energy is the world's largest generator of wind and solar energy and operates Florida Power & Light, one of the largest U.S. regulated utilities. Comparable to Constellation as a major clean-energy generation platform, though it is more renewables-heavy and primarily regulated rather than competitive retail.
- Southern Company: Southern Company is one of the largest U.S. investor-owned utilities, operating regulated electric and natural gas businesses across the Southeast with a substantial nuclear and gas generation fleet. Comparable as a broad incumbent integrated utility, though predominantly regulated versus Constellation's competitive merchant model.
- Duke Energy: Duke Energy is one of the largest U.S. electric utilities serving customers across the Carolinas, Midwest, and Florida, with substantial nuclear, natural gas, and renewables generation. Comparable as a broad incumbent utility with nuclear exposure and a growing focus on serving large-load data center customers.
- Public Service Enterprise Group: PSEG operates regulated electric and gas utilities in New Jersey plus a large nuclear generation fleet (including the Salem and Hope Creek plants that sell into PJM). Comparable as a nuclear-heavy incumbent utility with significant PJM exposure and direct overlap with Constellation in New Jersey/Mid-Atlantic markets.
- Dominion Energy: Dominion Energy is a large regulated utility serving Virginia, the Carolinas, and Utah, with significant nuclear (North Anna, Surry), natural gas, and renewables generation and a major data-center customer base in Northern Virginia. Comparable as a regulated incumbent that competes with Constellation for hyperscaler load in PJM.
- Entergy: Entergy is a regulated utility serving customers across the Mid-South with a large nuclear and natural gas generation fleet and growing data-center load in its service territory. Comparable as a broad incumbent utility with significant nuclear exposure and similar customer segments (residential, commercial, industrial).
- Exelon: Exelon is Constellation's former parent (spun off in 2022) and remains the largest U.S. T&D utility operator, serving customers across Illinois, Pennsylvania, Maryland, New Jersey, and DC. Comparable because Exelon purchases wholesale generation from Constellation, shares overlapping customer geographies, and was historically the same company.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Constellation social profiles
Digital presenceConstellation financial estimates
Financial estimateRevenue estimate
Valuation estimate
Constellation leadership team
Management profileNumber of profiles
Profiles6 records
Constellation subsidiaries and ownership
Company hierarchySubsidiaries4 records
Constellation funding detail
Funding detailFunding overview
Funding rounds1 record
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Constellation M&A and investment
M&A and investmentM&A
Investments11 records
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Constellation
What does Constellation do?
Constellation generates and supplies electricity and natural gas to residential, commercial, and enterprise customers across 16 U.S. states and Washington D.C. The company offers fixed-rate and variable-rate supply plans, plus renewable and nuclear energy plans, EV charging plans, smart home services, and home protection plans. Following the January 2026 Calpine acquisition, Constellation operates 55 GW of generation capacity including nuclear, natural gas, geothermal, solar, and battery storage assets, and is the largest electricity producer in the United States.
Is Constellation a public or private company?
Constellation is a public company. It is classified as public and is currently operating.
When was Constellation founded?
Constellation was founded in 2022. It employs 5,001 to 10,000 people.
Where is Constellation based?
Constellation is headquartered in Baltimore, United States, in the North America region.
How does Constellation make money?
Four revenue lines are on record. Electricity Generation and Sales are the primary driver. The others are carbon-Free Energy Matching Services, renewable Natural Gas (RNG) and residential Energy Supply.
Who are Constellation's main competitors?
Direct peers on record are Vistra Corp, NRG Energy and Talen Energy. Broad incumbents are NextEra Energy, Southern Company, Duke Energy, Public Service Enterprise Group, Dominion Energy, Entergy and Exelon.
Does Constellation have an API?
No public API is recorded for Constellation.
What industry is Constellation in?
Constellation's product category is Electricity Generation and Retail Energy Supply. Its primary akta.pro industry code is EUAMABAB, Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System), with a secondary code of EUACAGAC, PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations). Its NAICS code is 2211 and its SIC code is 4923.