Metlen Energy & Metals is a global industrial and energy company based in Maroussi, Athens, Greece. Founded in 1990, it has evolved from a family-run metallurgical business into a leader in energy transition and green metallurgy. The company operates in two main sectors: Energy and Metallurgy, with a consolidated turnover of approximately �5.5 billion.

Metlen has four primary business units: Power & Gas, which focuses on electricity and natural gas supply; Metallurgy, which includes the production of bauxite, alumina, and aluminum; Renewables & Storage Development, dedicated to renewable energy projects; and Sustainable Engineering, providing engineering and construction services. The company is recognized for its sustainable practices and is listed on the Athens Stock Exchange, participating in various sustainability indices. Metlen serves a diverse range of customers, including industrial and retail energy consumers, and is committed to sustainable development and circular economy principles.