About SmartestEnergy’s parent company, Marubeni Corporation

Explore our Sustainability Update Report 2025 which highlights our strategic achievements and outlines the focus areas that will guide our actions moving forward.

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A resilient and bankable partner you can trust

With the global financial backing and ongoing support of our parent company, our consumers, brokers and generators can have complete confidence that we’re a secure partner for the long term.

  • # 119 298

    In the Fortune Global 500 Companies List  

  • 20000 50000 +

    Group employees across 68 countries

  • $ 20 50.96 bn

    Revenue for the year ended March 31st 2024

A powerful history

1858

Marubeni founded by Chubei Itoh (1842-1903) when, age 15, he began business trips to deal in linen cloth.  

1949

Marubeni Corporation incorporated, and the following year listed shares on the Osaka Securities Exchange and Tokyo Stock Exchange.  

2000

Marubeni started SmartestEnergy Limited, adding an asset-light renewable energy company to its portfolio.  

2008

SmartestEnergy Limited entered the UK supply market, powering large businesses and Commercial and Industrial customers with renewable energy.

2024

With a 20+ year history of driving energy markets forward, SmartestEnergy is now an established, robust organisation with a wealth of experience connecting generators to customer demand and empowering the net zero transition.