Aker, a Norwegian holding company engaged in offshore fishing, construction and engineering, agreed to acquire a 75% stake in Mainstream Renewable Power, an independent renewable energy player, for €675m ($819m). "We are delighted to have such a highly respected business as Aker Horizons on board, enabling Mainstream to materially accelerate its growth plans to deliver a global portfolio of wind and solar assets. We plan to bring 5.5 GW of renewable assets to financial close globally by 2023, which sets us firmly on track to becoming one of the world's first pure-play renewable energy majors," Mary Quaney, Mainstream Renewable Power CEO.