Oilinvest is a The Hague-based investment and operating firm focused on energy-related businesses, including downstream segments such as refining, retail, wholesale, trading and lubricants. The firm owns Tamoil and HEM and has acted as a co-lead investor in seed-stage climate activity tied to Sweden, making it most relevant for founders in energy, sustainability, carbon removal, environmental services and adjacent energy-transition markets where strategic corporate capital is useful.