After declining for 2 years, the steel baron climbs 2 spots in the rankings as his ArcelorMittal reported net profit of $1.1 billion in a recent quarter, its best in 5 years. The world's biggest steelmaker, which has been buffeted by a global supply glut caused by exports from China, got a reprieve from an uptick in demand and import tariffs on steel imposed by the U.S. and Europe. In 2015 Arcelor saw revenue fall 20% to $64 billion and its net loss rise sevenfold to $7.9 billion. Arcelor, together with Italian steelmaker Marcegaglia, has bid for Italy's lossmaking ILVA steel plant.