SIZEWELL C LIMITED

Active
Company number 09284825Private limited companyIncorporated 2014

No accounts in digital format (iXBRL) since 2019. Paper or PDF accounts are available at Companies House.

Sector comparison

SIC 35110

Where the company stands among the 10,500 active companies whose first SIC code is 35110 (Production of electricity).

Company age12.0 years
Older than 66% · median 8.5 years
Largest in this sector by net assets
  1. ORSTED POWER (UK) LIMITED£5.7bn
  2. EDF ENERGY NUCLEAR GENERATION LIMITED£4.1bn
  3. CENTRICA PLC£3.5bn
  4. EDF ENERGY LIMITED£2.5bn
  5. DRAX POWER LIMITED£2.4bn
  6. RWE GENERATION UK PLC£2.1bn
  7. RWE RENEWABLES UK SWINDON LIMITED£1.7bn
  8. VATTENFALL WIND POWER LTD£1.7bn
  9. LIGHTSOURCE TITAN LIMITED£1.5bn
  10. EDF ENERGY NUCLEAR GENERATION GROUP LIMITED£993m

Positions are approximate. Figures come from each company's latest accounts; money and employee figures are compared only with companies that filed accounts in pounds for a period ending in the last two and a half years and are not dormant. The line on each bar marks the median.

Summary: SIZEWELL C LIMITED

What kind of company is it?

SIZEWELL C LIMITED is a private limited company registered with Companies House under company number 09284825. It was incorporated on 28 Oct 2014. Its status is active. The registered office is in London (EC2R). Its nature of business (SIC 2007) is production of electricity (35110).

How does it compare with similar companies?

Compared with 10,500 active companies whose first SIC code is 35110: It is older than 66% of them (median age 8.5 years).

Does it supply the public sector?

The company is named as the supplier in one public contract award notice, from Business Energy and Industrial Strategy. Contracts awarded to it alone have a combined published value of £250k. It is recorded as the recipient of one central government grant worth £5,998, from Department for Business, Energy and Industrial Strategy.

What do public registers and reports show?

It appears on the Home Office register of licensed sponsors (Skilled Worker). HMRC lists it as an importer of goods, mainly iron and steel articles, machinery, plastics. It has a modern slavery statement on the government registry.

Who runs and controls the company?

3 persons with significant control are registered. 3 of 5 registered charges are outstanding.

When are its next filings due?

The next accounts are due by 31 Dec 2027. The next confirmation statement is due by 1 Jun 2027.

Public contracts

1 contract

SIZEWELL C LIMITED is named as a supplier in 1 public contract award notice from Business Energy and Industrial Strategy. Its published value is £250k.

Contract
  1. SBRI Greenhouse Gas Removals Innovation Competition - Phase 1 [Design Study]‡Business Energy and Industrial Strategy · £250,000

From contract award notices on Contracts Finder (since 2016) and Find a Tender (since 2021), published by the Cabinet Office under the Open Government Licence v3.0. Values are as published by the buyer and usually cover the whole contract term; the total leaves out awards shared between several suppliers, where the published figure is a ceiling for all of them, placeholder values and single figures of £1 billion or more. Notices marked ‡ do not state a company number and were linked by an exact match on the registered name. Contracts below the publication thresholds and those of devolved buyers that publish elsewhere are not included.

Government grants

1 grant

SIZEWELL C LIMITED is recorded as the recipient of 1 central government grant, worth £5,998.

Grant
  1. Freeport East Energy Hub Feasibility StudyDepartment for Business, Energy and Industrial Strategy · £5,998 · UKRI - Innovate - Scheme 21/22

From the Government Grants Register published by the Cabinet Office (financial years 2016/17 onwards, Open Government Licence v3.0). It covers grants from central government departments and their agencies where the register states the recipient's company number and the recipient name matches this company; grants from local authorities, lottery distributors and devolved governments are not included.

Statutory reporting

Modern slavery statements1
2025
Statement · summary on GOV.UK

Figures the company reported itself to the government's Check payment practices service, Gender pay gap service and Modern slavery statement registry (Open Government Licence v3.0). Only large companies and employers with 250 or more staff have to report, so most companies have nothing here.

Registers and licences

Sponsor licence‡
Licence type and rating
Worker (A rating)
Route
Skilled Worker

On the Home Office register of licensed sponsors, which lists organisations licensed to sponsor workers from overseas.

International trade‡

Listed by HMRC as an importer of goods in 6 of the last 12 months on record, most recently August 2026. Main goods: iron and steel articles, machinery, plastics and ceramics.

From HMRC's monthly lists of importers and exporters. Traders can ask to be left off the lists, so absence does not mean a company does not trade.

Sources: Charity Commission for England and Wales, Care Quality Commission, Home Office and HM Revenue & Customs, under the Open Government Licence v3.0. Entries marked ‡ come from lists that do not state a company number and were linked by an exact match on the registered name.

History

8 events
  1. Financial year endedAccounts filed at Companies House
  2. Sizewell C (Holdco) Limited registered as a person with significant control
  3. Edf Energy Holdings Limited registered as a person with significant control
  4. Sizewell C (Pledgeco) Limited registered as a person with significant control
  5. Sizewell C (Holding) Limited ceased to be a person with significant control
  6. Name changed to SIZEWELL C LIMITEDPreviously NNB GENERATION COMPANY (SZC) LTD
  7. Sizewell C (Holding) Limited registered as a person with significant control
  8. Company incorporatedPrivate limited company

Dates as recorded at Companies House: incorporation, name changes, officer appointments and resignations, current and former persons with significant control, and the end of each financial year with figures in the database.