The work revealed a core of 1318 companies with interlocking ownerships. Each of the 1318 had ties to 2 or more other companies, and on average they were connected to 20. What’s more, although they represented 20% of global operating revenues, the 1318 appeared to collectively own through their shares the majority of the world’s large blue chip and manufacturing firms – the “real” economy – representing a further 60% of global revenues.

tl;dr: only one company in the top 50 actually produces anything at all (china petroleum), the rest is money launderers.