Supplier profile

100Green

100Green is the trading name of Green Energy (UK), an independent British renewable energy supplier.

Last reviewed 25 September 2026

Electricity & gasSmall businesses seeking a specialist renewable supplier
Legal supplierGreen Energy (UK) LimitedCompany no. 04194006
OwnershipPrivatePrivately owned independent supplier; no listed parent company.
Founded2001Ware, Hertfordshire
Supply focusElectricity & gasSmall businesses seeking a specialist renewable supplier
Small business owner discussing a commercial heat pump installation, relevant to 100green
Low-carbon equipment must suit the building and its operating needs.

Company and ownership

Who owns 100Green?

Privately owned independent supplier; no listed parent company.

Ownership structurePrivate
No standalone public share price

A quoted parent’s share price changes throughout the trading day. The link above goes to the parent company’s investor information rather than displaying a price that could quickly become stale.

Group relationships

Affiliations and related businesses

Green Energy (UK) LimitedFormerly Green Energy UK / GEUK

Related companies can share a parent or brand while remaining separate legal entities. Check the company named in the principal terms, on the bill and in the complaints procedure before relying on a group relationship.

Sustainability team reviewing an energy retrofit at a commercial site, relevant to 100green
A practical transition plan joins investment, operations and verified savings.

Commercial fit

What the supplier offers

  • Renewable business electricity
  • Green-gas propositions
  • Export and smart-meter services

Renewable position: The brand centres on renewable electricity and green gas. Check the proportion and source of biomethane, certificates and any residual natural gas.

Independent comparisonNot in the current Citizens Advice table

This does not mean zero complaints or poor performance. The published table covers a defined set of suppliers with sufficient data.

Before signing

Points to check

  • Green-gas terminology can cover different mixes and mechanisms.
  • Compare environmental evidence and total cost as separate tests.
  • Recalculate the quote with your own annual consumption, contract dates and every known fee.
  • Confirm broker remuneration, renewal terms, payment method and the complaint escalation route in writing.
Business owner and solar engineer inspecting commercial rooftop panels, relevant to 100green
On-site generation should be assessed against the building, demand and long-term plan.

Sources

Ownership, company and product information checked against:

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