Impera Consulting Sp Zoo acquired 4.64% stake in MDI Energia S.A. (WSE:MDI) from Oval Limited on September 7, 2017. Post completion, Oval will hold no stake in MDI Energia. Impera Consulting Sp Zoo completed the acquisition of 4.64% stake in MDI Energia S.A. (WSE:MDI) from Oval Limited on September 7, 2017.