German electric utility EnBW Energie Baden-Wuerttemberg AG (<a href="https://www.boerse-frankfurt.de/equity/enbw-energie-baden-wuerttemberg-ag?mic=XFRA" target="_blank">ETR:EBK</a>) has raised EUR 3.1 billion (USD 3.6bn) through a rights issue to help finance the largest investment programme in its history, the company said on Tuesday.