LONDON – 9 January 2023 – Castleton Commodities International LLC (“CCI”) announced today that a subsidiary has acquired a majority stake in S4 Energy BV (“S4 Energy”), a company that develops, owns and operates large-scale energy storage systems.

Based in the Netherlands, S4 Energy builds hybrid storage systems by combining grid-scale lithium-ion batteries together with the company’s proprietary KINEXT flywheel technology. S4 Energy has an operating portfolio of 25MW in the Netherlands and a project pipeline across various stages of development and construction. The company targets building more than 300MW of long-duration storage assets over the next 3 years throughout Western Europe.

"We are pleased to partner with S4 Energy as a shareholder and look forward to working closely with them to develop the company into a pan-European platform of scale. This investment reflects our conviction that energy storage will be a key enabler of decarbonization, while maintaining the stability and reliability of the power grid in Europe,” said Mohit Singh, Vice President in CCI’s European Principal Investments team.

Leo Visser, CEO of S4 Energy, said, “We are very excited and proud to welcome CCI as a majority shareholder. With their international network, expertise and access to capital we will be able to accelerate the deployment of our grid connected energy storage projects significantly and we can promote the added value of our proprietary KINEXT storage technology in other applications as well.

About Castleton Commodities International LLC
CCI is a global energy commodity merchant with integrated businesses focused on marketing, merchandising, and trading commodities, and the ownership, operation and development of commodities-related infrastructure assets. Please visit our website for more information:

Media contact
Hannah Curnutt
Hill+Knowlton Strategies

About S4 Energy
S4 Energy employs specialist expertise and equipment together with sophisticated software to fully unlock the power of energy storage. We help energy producers, grid operators and end users to stabilize supply and demand and make the most of their existing infrastructure. Our mission is to make energy and power management smarter, more flexible and more profitable. Please visit our website for more information:

Media contact
Dominique Becker Hoff