Tesla CEO Elon Musk experienced the biggest decline in compensation. He earned $49,920 in salary, which is minimum wage in California for an 80-hour week. That's 99.996 percentless than his 2016 compensation, which was valued at more than $1.3 billion after he exercised soon-to-expire options on the automaker's skyrocketing stock.
Last year, Musk was in the list's No. 1 spot; this year he is at the bottom. He may not be in the study much longer, if he succeeds in a recently announced plan to take Tesla private.
Compensation dropped 60 percent for Goodyear Tire & Rubber CEO Richard Kramer, to $5.5 million, and 56 percent for KAR Auction Services CEO Jim Hallett, to $6.5 million.
They are among nine CEOs included in the study who experienced a decline in compensation from 2016.
Dustin Walsh contributed to this report.