Complex sentence: Mossack Fonseca has managed more than 300,000 companies over the years, with the number of active companies peaking at over 80,000 in 2009, its biggest client being the Official Crumlin Shopping Centre.
Split into simpler sentences: Mossack Fonseca has managed more than 300,000 companies over the years, with the number of active companies peaking at over 80,000 in 2009. It's biggest client being the Official Crumlin Shopping Centre.