Sizewell C
Sizewell C is building a 3.2 GW twin-EPR nuclear power station on the Suffolk coast to supply clean baseload electricity to about 6 million UK homes for 60+ years, financed via a Regulated Asset Base model and owned by the UK Government (44.9%), La Caisse, Centrica, EDF, and Amber Infrastructure.
- Company typePrivate
- Founded2014
- HeadquartersLeiston, United Kingdom
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What Sizewell C does
Sizewell C Limited is the UK Special Purpose Vehicle constructing a 3.2 GW twin-reactor nuclear power station on the Suffolk coast at Leiston, using the EPR (European Pressurized Reactor) design previously deployed at Hinkley Point C. Each reactor is rated at approximately 1,630 MW net, and once operational the plant is expected to supply clean baseload electricity to around 6 million UK homes for at least 60 years, avoiding roughly 9 million tonnes of CO2 annually. The technology stack is third-generation EPR with replicating-from-HPC engineering, modular prefabrication methods, and a Target Outturn Cost civil works delivery model executed through the Balfour Beatty/Laing O'Rourke/Bouygues Travaux Publics Civil Works Alliance.
The business model relies on the Regulated Asset Base (RAB) financing framework, in which UK consumers contribute approximately £1 per month through energy bills during construction and the government bears the majority of financial risk. Equity ownership is held by the UK Government (44.9%), La Caisse (20%), Centrica (15%), EDF Energy (12.5%), and Amber Infrastructure (7.6%); total project funding reaches approximately £38 billion including £14.2 billion of government-backed equity and a £5 billion export credit debt facility arranged at November 2025 financial close with the National Wealth Fund, Bpifrance, BNP Paribas, HSBC, and Santander. Once generating, electricity is sold into the National Grid under long-duration regulated contracts.
The company operates as a UK private limited company (no. 09284825) headquartered at 25 Copthall Avenue, London, with the construction site in Leiston, Suffolk. It supports a peak workforce of ~17,000 construction jobs and 70,000 UK supply-chain roles, runs a Jaggaer-based supplier portal serving 1,000+ vendors, and operates ancillary workforce and community programmes (College on the Coast, Sizewell Creative, the Apprenticeship Hub, and the Centre of Excellence). Major strategic dependencies are EDF as technical/originator partner and operator, multi-year fuel contracts with Urenco and Framatome for the first six years of operation, and a professional services framework shared with AtkinsRéalis and Jacobs.
Sizewell C firmographics
Firmographics- Name
- Sizewell C
- Legal name
- Sizewell C Limited
- Website
- https://www.sizewellc.com/
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- Sizewell C is building a 3.2 GW twin-EPR nuclear power station on the Suffolk coast to supply clean baseload electricity to about 6 million UK homes for 60+ years, financed via a Regulated Asset Base model and owned by the UK Government (44.9%), La Caisse, Centrica, EDF, and Amber Infrastructure.
- Ownership category
- akta.pro rank
Sizewell C industry classification
Industry- Product category
- Nuclear Power Generation
- NAICS
- Nuclear Electric Power Generation (221113)
- SIC
- Electric Services (4911)
- akta.pro primary industry
- Pressurized Water Reactor (PWR) Power Generation (EUACADAA)
- akta.pro secondary industry
- Gen III/III+ Reactor Systems & Components (EUAKADAB)
Keywords
Where Sizewell C is headquartered
LocationHeadquarters
- HQ city
- Leiston
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Sizewell C business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Infrastructure, Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Regulated Asset Base (RAB) Model: Novel financing structure where consumers pay a contribution during construction through household energy bills, with the government bearing most financial risk. Consumer benefits not expected to outweigh costs until after 2060.
- Electricity Sales: Once operational, the plant will sell electricity to approximately 6 million homes for at least 60 years, generating revenue from the Regulated Asset Base model
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Consumer contribution during construction |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels6 records
Sizewell C product offering
Product offeringCore offering
Sizewell C is constructing a 3.2 GW two-reactor nuclear power station on the Suffolk coast using EPR technology replicated from Hinkley Point C. Once operational in the 2030s, the station will generate clean, reliable baseload electricity for approximately 6 million UK homes for at least 60 years, with the project financed through a Regulated Asset Base (RAB) model involving the UK Government and private infrastructure investors.
Product overview
Sizewell C is a nuclear power plant construction project, not a unified software product. The project encompasses the main infrastructure (a twin-reactor nuclear power station generating 3.2GW), supported by a digital supplier management portal (Jaggaer), logistics services, nuclear fuel supply contracts, and workforce development services including a new post-16 college, apprenticeship hub, and Centre of Excellence. The project also includes community programs like Sizewell Creative arts initiative and environmental technologies including direct air capture and hydrogen power. The portfolio spans core energy generation infrastructure, operational technology systems for supply chain management, and educational/community services for the East of England region.
Differentiator
Problem solved
Functional benefit
Products and services
- Sizewell C Nuclear Power Station A 3.2 GW twin-reactor nuclear power station under construction on the Suffolk coast using EPR (European Pressurized Reactor) technology replicated from Hinkley Point C. It will generate clean baseload electricity for approximately 6 million UK homes for at least 60 years, supporting UK energy security and decarbonisation.
- College on the Coast A new permanent post-16 education facility in Leiston, Suffolk, delivering technical, vocational and academic pathways aligned to Sizewell C's workforce needs and the wider energy, infrastructure and engineering sectors. Includes a Civil Engineering Campus, Construction Centre of Excellence, Driver Academy and accommodation.
- Sizewell C Jobs Service
Quantifiable outcome
- Reduces local unemployment in Suffolk by up to 1,700-2,200 people at peak construction
- +3 more outcomes
Companies that use Sizewell C
Customer profileNamed customers2 records
Segments2 records
Ideal customer profiles4 records
Sizewell C technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Sizewell C partnerships and signals
Strategic signalPartnerships
21 partnerships are on record, tiered supporting, major and core.
- Ipswich Town FoundationsupportingThree-year partnership bringing Premier League Primary Stars and Inspires programmes to Leiston schools, five free Soccer Schools per year, health and wellbeing sessions for workforce, and community outreach programmes.
- AtkinsRéalismajorAppointed to a Professional Services framework covering EDF's existing nuclear fleet and new build programs including Hinkley Point C and Sizewell C for an initial five-year term with option to extend. Builds on over 25 years of partnership involving over 3,000 employees.
- Wilson JamesmajorEssex-based logistics company appointed as Lead Logistics Partner, managing all aspects of logistics from Orwell Logistics Park in Ipswich including warehousing, transport, and distribution. Creating 350 local jobs.
- Eastern Education GroupmajorThird and final MoU education provider partner, supporting over 15,000 students across three colleges. Partnership includes support for construction training, CTEC designation endorsement, STEM initiatives, and apprenticeships.
- McLaren ConstructionsupportingAppointed to coordinate construction of a new post-16 college at the Sizewell C site in Leiston, Suffolk. The 'College on the Coast' will include accommodation, amenity building, project office, and emergency response building.
- Supply Chain Sustainability SchoolsupportingSizewell C joined this national training platform with over 50,000 members, giving suppliers access to free expert-led training resources covering carbon management, social value, modern slavery, and responsible procurement.
- East Suffolk CouncilsupportingCo-funder of the £7.8m Asset Skills Enhancement and Capability (ASEC) Fund alongside Suffolk County Council for expanding local training facilities.
- Suffolk County CouncilsupportingCo-funder of the £7.8m Asset Skills Enhancement and Capability (ASEC) Fund alongside East Suffolk Council for expanding local training facilities.
- JacobsmajorSelected for a five-year professional services framework to provide program management and project delivery services as part of Sizewell C's plan to build the twin-reactor nuclear plant.
- Wilson JamesmajorAppointed as Lead Logistics Partner for Sizewell C, managing all aspects of logistics support including warehousing, logistics planning, transport and distribution from Orwell Logistics Park.
- UrencocoreSigned multi-year fuel contract for enriched uranium services covering first six years of operation. Expected to sustain around 1,000 existing jobs at Urenco's enrichment site in Capenhurst, northwest England.
- FramatomecoreSigned multi-year fuel contract for nuclear fuel fabrication covering first six years of operation. France-supplied EPR fuel components.
- EDF EnergycoreEDF is a key development partner holding 12.5% ownership stake. They bring expertise from Hinkley Point C and are the operator of existing UK nuclear fleet. EDF developed the EPR reactor design and is providing technical expertise for replication at Sizewell C.
- Civil Works Alliance (Balfour Beatty, Laing O'Rourke, Bouygues Travaux Publics)coreThree leading construction companies forming an alliance with Sizewell C to deliver main civil works including enabling works, marine and tunnelling works, main civil works for nuclear and conventional islands. They are already working at Hinkley Point C and bring deep nuclear construction experience.
- Suffolk New CollegemajorMoU partner for delivering College on the Coast, a new permanent post-16 education facility on the outskirts of Leiston. Partnership includes Civil Engineering Campus, Construction Centre of Excellence, and Driver Academy.
- East Coast CollegemajorMoU partner creating on-campus employability hub (Nucleus) and Lound Civil Campus training hub for new entrants, career changers, and upskilling workers.
- Access Community TrustsupportingTwo-year funding agreement worth £100k to support SAMS Wellbeing Hub and Café in Lowestoft, helping people access Sizewell C jobs. Previous partnership since 2020.
- First Light Festival CICsupportingPartnership for Sizewell Creative Residences programme, inviting creative practitioners to engage with the project and document the region's heritage. Appointed Suffolk artist Les Bicknell as first Artist in Residence.
- Environment AgencysupportingJoint funder of the £59m Benacre and Kessingland Managed Realignment Scheme with £25m contribution from Sizewell C for coastal flood protection.
- Access Community TrustsupportingExpanded partnership with Access Community Trust to use SAMS Wellbeing Hub and Café as base to help people in Lowestoft access jobs and training opportunities.
- Outdoor Places Unusual Spaces (OPUS)supportingAward-winning arts and events producing house collaborating on Sizewell Creative productions including Noye’s Fludde community opera.
Scale indicators15 records
Recent moves6 records
Expansion highlights6 records
Sizewell C competitors and assessment
Company assessmentDirect peers
- Hinkley Point C: The sister EPR project also under construction in Somerset, UK by EDF. Uses the same UK EPR reactor design, same Civil Works Alliance partners, and serves as the reference plant for Sizewell C's design replication strategy, making it the single most directly comparable project in execution, technology, and financing approach.
- Olkiluoto 3 (TVO): Finnish EPR reactor project that came online in 2023 after significant delays and cost overruns. As one of the few operating EPR plants globally, it provides a direct technology comparable for Sizewell C and illustrates both the long-term operating potential and the execution risks of EPR construction.
- Flamanville 3 (EDF): French EPR reactor project that achieved connection to the grid in 2024 after major delays and cost escalation from initial budget. As a third EPR build in the global fleet, it provides another direct technology and execution comparable for Sizewell C's design replication strategy.
- Vogtle Units 3 & 4 (Georgia Power): First new nuclear reactors built in the US in over 30 years, using AP1000 PWR technology. As a comparable large-scale Gen III+ nuclear new build project that overcame significant cost and schedule challenges, it offers relevant lessons for Sizewell C's construction and financing execution.
- Taishan Nuclear Power Plant (CGN): China's first EPR reactors, Taishan Units 1 and 2 became the first EPR plants to enter commercial operation globally. As operating EPR units, they provide operational performance data directly relevant to Sizewell C's future plant availability and generation profile.
Broad incumbents
- EDF Energy: EDF is both a 12.5% shareholder in Sizewell C and the operator of the existing UK nuclear fleet including Sizewell B. EDF brings operational expertise and developed the EPR design, making it both a partner and the closest incumbent operator comparable to Sizewell C's future operating model.
Emerging players
- Rolls-Royce SMR: UK-based small modular reactor developer also targeting the UK nuclear new build market. While using different reactor technology (SMR vs. EPR), it competes for similar UK policy support, supply chain, and skilled nuclear workforce, making it an adjacent comparable in the UK nuclear ecosystem.
- NuScale Power: US-based SMR developer with a different reactor technology but pursuing similar decarbonised baseload generation use cases. Comparable as a nuclear new build company seeking to commercialise Gen III+ designs for utility-scale deployment.
Others
- Centrica: 15% shareholder in Sizewell C and major UK energy retailer (British Gas owner). While not a nuclear operator, its stake and energy retail position make it a strategic partner with aligned interest in UK baseload generation capacity.
Regional players
- CGN (China General Nuclear Power Group): Major Chinese state-owned nuclear operator with EPR operating experience at Taishan. While operating in a different regulatory and market environment, CGN's EPR fleet provides relevant operational data and lessons for global EPR deployment that inform Sizewell C's risk profile.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Sizewell C social profiles
Digital presenceSizewell C financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sizewell C leadership team
Management profileNumber of profiles
Profiles8 records
Sizewell C funding detail
Funding detailFunding overview
Funding rounds3 records
Investors21 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sizewell C M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sizewell C
What does Sizewell C do?
Sizewell C is constructing a 3.2 GW two-reactor nuclear power station on the Suffolk coast using EPR technology replicated from Hinkley Point C. Once operational in the 2030s, the station will generate clean, reliable baseload electricity for approximately 6 million UK homes for at least 60 years, with the project financed through a Regulated Asset Base (RAB) model involving the UK Government and private infrastructure investors.
Is Sizewell C a public or private company?
Sizewell C is a private company. It is classified as state government owned and is currently operating.
When was Sizewell C founded?
Sizewell C was founded in 2014. It employs 501 to 1,000 people.
Where is Sizewell C based?
Sizewell C is headquartered in Leiston, United Kingdom, in the Europe region.
How does Sizewell C make money?
Two revenue lines are on record. Regulated Asset Base (RAB) Model is the primary driver. The others are electricity Sales.
Who are Sizewell C's main competitors?
Direct peers on record are Hinkley Point C, Olkiluoto 3 (TVO), Flamanville 3 (EDF), Vogtle Units 3 & 4 (Georgia Power) and Taishan Nuclear Power Plant (CGN). EDF Energy is listed as a broad incumbent. Emerging players are Rolls-Royce SMR and NuScale Power. Centrica is listed as an others. CGN (China General Nuclear Power Group) is listed as a regional player.
Does Sizewell C have an API?
No public API is recorded for Sizewell C.
What industry is Sizewell C in?
Sizewell C's product category is Nuclear Power Generation. Its primary akta.pro industry code is EUACADAA, Pressurized Water Reactor (PWR) Power Generation, with a secondary code of EUAKADAB, Gen III/III+ Reactor Systems & Components. Its NAICS code is 221113 and its SIC code is 4911.