Aubrey McClendon

In a surprise announcement after the markets closed Tuesday, Chesapeake Energy announced the departure of Aubrey McClendon, the flamboyant entrepreneur who helped found the natural gas and oil company twenty-four years ago.

McClendon, 53, will retire from Chesapeake April 1, according to a company press release, and a search for his successor is now underway. In the release, McClendon said he expected to collaborate with the board during the leadership transition even though he had "certain philosophical differences" with its members.