- John Fredriksen (Net worth: $7.3 Billion)
Fredriksen’s empire includes oil tankers, dry bulkers, LNG carriers and deepwater drilling rigs. In 1960s in Beirut, he got into oil trading; in the 70s he bought his first tankers; in the 80s he ran crude for Iran and had tankers hit by missiles. His offshore drilling rig company Seadrill began bankruptcy reorganization in 2017. Biggest single stake continues to be Marine Harvest, which has rolled up competitors in recent years to become the biggest fish farmer in the world.