Exxon Mobil

2016 Revenue: $205 billion
One-year Revenue Change: -16.7%

Even an energy giant like Exxon Mobil (xom, +1.01%) couldn’t weather the oil slump without some fallout. As OPEC struggled to put a together a production agreement addressing the global oil glut, Exxon Mobil’s revenue slid 16.7%, while profits sank to $7.8 billion—down 51.5% from a year earlier.