Sizewell C

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.

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

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

• Nuclear power generation
• Electricity infrastructure
• Clean energy projects
• Power plant construction
• Regulated asset base financing

Headquarters

HQ city

Leiston

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. 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.
2. 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

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core 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

Named customers2 records

Segments2 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

21 partnerships are on record, tiered supporting, major and core.

• Ipswich Town FoundationsupportingStrategic or Co-development Partner · 3 June 2026Three-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.
• AtkinsRéalismajorImplementation/ SI/ Consulting Partner · 26 May 2026Appointed 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 JamesmajorImplementation/ SI/ Consulting Partner · 20 May 2026Essex-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 GroupmajorStrategic or Co-development Partner · 18 May 2026Third 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 ConstructionsupportingImplementation/ SI/ Consulting Partner · 29 April 2026Appointed 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 SchoolsupportingStrategic or Co-development Partner · 23 April 2026Sizewell 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 CouncilsupportingStrategic or Co-development Partner · 24 March 2026Co-funder of the £7.8m Asset Skills Enhancement and Capability (ASEC) Fund alongside Suffolk County Council for expanding local training facilities.
• Suffolk County CouncilsupportingStrategic or Co-development Partner · 24 March 2026Co-funder of the £7.8m Asset Skills Enhancement and Capability (ASEC) Fund alongside East Suffolk Council for expanding local training facilities.
• JacobsmajorImplementation/ SI/ Consulting Partner · 20 January 2026Selected 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 JamesmajorImplementation/ SI/ Consulting Partner · 18 December 2025Appointed as Lead Logistics Partner for Sizewell C, managing all aspects of logistics support including warehousing, logistics planning, transport and distribution from Orwell Logistics Park.
• UrencocoreTechnology or Integration · 16 September 2025Signed 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.
• FramatomecoreTechnology or Integration · 16 September 2025Signed multi-year fuel contract for nuclear fuel fabrication covering first six years of operation. France-supplied EPR fuel components.
• EDF EnergycoreStrategic or Co-development Partner · 22 July 2025EDF 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)coreStrategic or Co-development Partner · 30 June 2025Three 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 CollegemajorStrategic or Co-development Partner · 6 June 2025MoU 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 CollegemajorStrategic or Co-development Partner · 6 June 2025MoU partner creating on-campus employability hub (Nucleus) and Lound Civil Campus training hub for new entrants, career changers, and upskilling workers.
• Access Community TrustsupportingStrategic or Co-development Partner · 21 November 2024Two-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 CICsupportingStrategic or Co-development Partner · 19 November 2024Partnership 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 AgencysupportingStrategic or Co-development Partner · 30 September 2024Joint funder of the £59m Benacre and Kessingland Managed Realignment Scheme with £25m contribution from Sizewell C for coastal flood protection.
• Access Community TrustsupportingStrategic or Co-development Partner · 25 September 2024Expanded 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)supportingStrategic or Co-development Partner · 16 July 2024Award-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

Direct 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

• LinkedInlinkedin.com/company/sizewellc

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds3 records

Investors21 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sizewell C