Who owns SmartestEnergy?
SMARTESTENERGY LIMITED (Companies House number 03994598) is part of JPN, incorporated on 16 May 2000.
About SmartestEnergy and their out-of-contract rates
SmartestEnergy Limited
At a glance
SMARTESTENERGY LIMITED (Companies House 03994598) is the licensed UK retail entity owned by JPN. Registered office: The Columbus Building, 7 Westferry Circus, London, E14 4HD. Latest filed turnover £761m (year ending 2025) with 755 employees.
Last verified 7 May 2026 · Sources: Companies House (03994598), Citizens Advice non-domestic league table, Ofgem licence register.
SmartestEnergy business contact
Direct lines for business customers
- Phone
- 01903 703400
- Contact page
- Open on SmartestEnergy
Sourced from SmartestEnergy's official contact page. Verify before relying on these details for billing or contract-end disputes.
SmartestEnergy is one of the UK's larger C&I-focused suppliers, founded in 2001 and wholly owned by Japanese trading house Marubeni Corporation. The business specialises in renewable PPAs, REGO trading and providing independent generators with a route to market.
Parent
Marubeni Corporation (Japan)
Founded
2001
Headquarters
London
Latest revenue
Not published
SmartestEnergy out-of-contract rates 2025
When a fixed contract ends and a new one is not signed, supply continues at deemed or out-of-contract rates set by the supplier, typically materially higher than fixed-rate offers. Verify the regional figure on SmartestEnergy's own published schedule before relying on it.
Latest published rates
Effective 2025-04-01Rates exclude DUoS, TNUoS and CCL pass-throughs which materially add to billed cost.
Last reviewed 2026-05-05. Always verify rates with the supplier before relying on them.
Companies House
SmartestEnergy corporate structure
Live from the UK government register. Status, officers, ultimate beneficial owners and outstanding secured debt for the licensed retail entity.
Legal entity
SMARTESTENERGY LIMITED
No. 03994598 · ltd
Status
Active
Jurisdiction: england wales
Incorporated
16 May 2000
26 years on the register
Registered office
The Columbus Building, 7 Westferry Circus, London, E14 4HD, England
Active officers
9 active · 48 resigned (history)
- Joanna Louise ButlinDirectorAppointed 1 June 2025British
- Robert Sebastian GrovesDirectorAppointed 1 April 2006British
- David Richard LloydDirectorAppointed 11 April 2024British
- Tomoki NishinoDirectorAppointed 1 April 2020Japanese
- Hiroyuki SawadaDirectorAppointed 1 June 2025Japanese
- Akira SudaDirectorAppointed 1 April 2026Japanese
- Kosuke TashiroDirectorAppointed 1 April 2026Japanese
- Suguru TsuzakiDirectorAppointed 11 April 2024Japanese
Beneficial owners (PSCs)
1 active
- Marubeni CorporationCorporateCorporation
Ownership Of Shares 75 To 100 Percent
Industry classification (SIC)
4 codes recorded
- 35110 · Production of electricity
- 35130 · Distribution of electricity
- 35140 · Trade of electricity
- 35230 · Trade of gas through mains
Next accounts due: 31 December 2026 (last filed 31 March 2025)
Outstanding charges
3 total · 1 outstanding · 2 satisfied
Debt secured against the company's assets (debentures, floating charges, mortgages). Outstanding charges sit ahead of unsecured creditors in any insolvency.
- A registered chargeoutstandingFiled 15 July 2019 · In favour of Nord Pool As
Source: Companies House (UK government register) via the public REST API. Cached for 24h. Revenue and profit figures are not part of this dataset; for those see the “Latest revenue / profit” panel above.
SmartestEnergy business profile
Independent company data for the licensed retail entity, drawn from the latest filed accounts and statutory registers. Refreshed monthly. Not a credit recommendation.
Last refreshed 7 May 2026
- Risk band
- Stable
- Score 62/100
- Healthy, broadly stable profile with no immediate concerns.
- Recommended credit limit
- £20m
- Provider's guidance, not a Purely Energy recommendation.
- Turnover (latest filed)
- £761m
- Year ending 31 March 2025
- Total assets
- £1.8bn
- Creditor days 39
- Headcount (filed)
- 755
- As of 31 March 2025
- Next accounts due
- 31 December 2026
- Parent company
- JPN
5-year financial trend
Turnover CAGR +32.3% over 4 years
| Year ending | Turnover | YoY | Operating profit | EBITDA | Total assets | Employees |
|---|---|---|---|---|---|---|
| 31 March 2025 | £761m | +52.2% | £174m | £180m | £1.8bn | 755 |
| 31 March 2024 | £500m | -26.3% | £169m | £176m | £2.2bn | 667 |
| 31 March 2023 | £679m | +168.3% | £255m | £262m | £2.5bn | 539 |
| 31 March 2022 | £253m | +2.0% | £40m | £45m | £3.3bn | 319 |
| 31 March 2021 | £248m | - | £3.1m | £8.3m | £630m | 279 |
Sourced from filed accounts at Companies House. YoY = year-on-year turnover change. CAGR = compound annual growth rate across the window shown.
Latest filed profit and loss
Year ending 31 March 2025
- Turnover
- £761m
- Gross profit
- £334m
- Operating profit
- £174m
- Pre-tax profit
- £161m
- EBITDA
- £180m
- Dividends
- £142m
Registered office
The Columbus Building, 7 Westferry Circus, London, E14 4HD
London · Tower Hamlets
Auditor
Ernst & Young LLP
Active officers· 57 on the public register
- MR MASAO IMAZATO· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
- MR YOSHIHIRO MEGATA· D· DIRECTOR· since 2003LinkedIn ↗
- MR NOBUHIRO YABE· D· COMPANY DIRECTOR· since 2020LinkedIn ↗
- MARK LIDDELL HALLIDAY· D· since 2000LinkedIn ↗
- MR MUTSUMI ISHIZUKI· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
- KENJI NATORI· D· GENERAL MANAGER· since 2001LinkedIn ↗
- MR TOMOKI NISHINO· D· COMPANY DIRECTOR· since 2020LinkedIn ↗
- TATSUYA OZONO· D· DIRECTOR· since 2005LinkedIn ↗
- MR TATSUYA OZONO· D· COMPANY DIRECTOR· since 2019LinkedIn ↗
- HIROSHI TOYOSHIMA· D· DIRECTOR· since 2004LinkedIn ↗
Plus 47 more on the public register.
Industry (SIC07)
- 35230: Trade of gas through mains · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
- 35230: Trade of gas through mains · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
- 35140: Trade of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
- 35140: Trade of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
- 35200: Manufacture of gas; distribution of gaseous fuels through mains
- 35130: Distribution of electricity · ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
Trading history and former names
- FIRESCAPE LIMITED, 2000 to 2000
Outstanding charges
3 on the public register
- NORD POOL AS · 1 July 2019
- NASDAQ OMX STOCKHOLM AB · 15 September 2010
- BRITISH OVERSEAS BANK NOMINEES LIMITED AND WGTG NOMINEES LIMITED · 7 June 2005
Public contact details
- Website
- www.smartestenergy.com
- Telephone
- +448003163105
- customer-services@smartestenergy.com
VAT number GB773846584
Frequently asked
SmartestEnergy: questions answered
What is SmartestEnergy's credit rating and financial position?
Based on the latest filed accounts at Companies House, SMARTESTENERGY LIMITED has a credit score of 62/100, a derived risk band of Stable, a recommended credit limit of £20m, turnover of £761m (FY25). Full figures and source filings are in the business profile section above.
What is SmartestEnergy's registered office and how do I contact them?
SMARTESTENERGY LIMITED's registered office is The Columbus Building, 7 Westferry Circus, London, E14 4HD. Public contact details: telephone +448003163105, email customer-services@smartestenergy.com. For broker enquiries via Purely Energy, see the contact panel above.
What are SmartestEnergy's turnover and financial accounts?
SMARTESTENERGY LIMITED's most recently filed accounts (year ending 2025) show turnover of £761m, operating profit of £174m, total assets of £1.8bn, 755 employees. Annual accounts are filed at Companies House and refreshed in our profile monthly.
What are SmartestEnergy's out-of-contract rates for businesses?
As of 2025-04-01, SmartestEnergy's out-of-contract rates are electricity at 27.39p/kWh with a 234p/day standing charge; and gas at 8.73p/kWh with a 934p/day standing charge. Rates vary by region and meter type — verify on SmartestEnergy's own published schedule before relying on them.
Is SmartestEnergy safe for business customers?
SMARTESTENERGY LIMITED holds a valid Ofgem electricity and gas supply licence, files audited accounts at Companies House, with latest turnover of £761m. We do not give financial advice; verify the latest filings and any recent enforcement actions before signing a long-term contract.
Can I get a fixed business gas or electricity quote from SmartestEnergy via Purely Energy?
Yes. As an independent broker we tender against SmartestEnergy alongside 30+ tier-1 UK suppliers. Each quote breaks the unit price into wholesale energy, non-commodity costs, supplier margin, and our broker margin so you see exactly what you are paying. Request a comparison via the buttons above.
Sources and references
- Companies House filing 03994598
- Citizens Advice non-domestic supplier league table
- SmartestEnergy published deemed rates
- Ofgem supply licence register
- All 15 UK suppliers' out-of-contract rates compared
We are an independent UK B2B energy broker. Profile data is sourced from the public registers above and refreshed monthly. Not a credit recommendation. Verify recent filings before relying on any figure.
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