Bio-Kasz Sp. Z O.O. acquired 8.17% stake in Clean&Carbon Energy S.A. on December 15, 2017. Bio-Kasz Sp. Z O.O. raises its stake in Clean&Carbon Energy S.A. to 28.72%. Bio-Kasz Sp. Z O.O. completed the acquisition of 8.17% stake in Clean&Carbon Energy S.A. on December 15, 2017.