Investment firm, the Carlyle Group has announced the acquisition of a substantial minority interest in Spanish firm, Compañía Española de Petróleos, S.A.U (Cepsa) from Abu Dhabi-based Mubadala Investment Company. The transaction which is slated to conclude by 2019-end will make Carlyle a shareholder in Europe’s largest privately-owned integrated oil & gas firm. The agreement is in line with Mubadala’s strategy to draw in new partners.