TheStreet: Roger Ailes, Biogen Shake-Up and Other Notable CEO Departures of 2016

Original Article: https://www.thestreet.com/slideshow/13648342/1/roger-ailes-biogen-shake-...

"'The No. 1 reason that CEOs leave is company performance. There's a very clear scorecard,' said John Challenger, CEO of Challenger Gray & Christmas in a phone interview."