The story
In 2005, the company (then called Zilkha Renewable Energy, and owned by Selim Zilkha and Michael Zilkha) was purchased by investment bank Goldman Sachs for an undisclosed sum and renamed Horizon Wind Energy. In 2007, the company was acquired by EDP Renováveis' parent company Energias de Portugal for $2.15 billion and later renamed EDP Renewables North America.
From Wikipedia’s article on EDP Renewables North America, shared under CC BY-SA 4.0.5