Mr. Perlman was replaced as chief executive on Feb. 20.

Replacing him as chairman and chief executive is William C. Croft.

He replaced Vincent Hogg as chief executive in 2005.

Katharine Graham will be replaced by her son as chief executive of the Washington Post Company.

He replaced Michael Geoghegan as chief executive after a very public boardroom reshuffle.

After getting the business going, Mr. Bontempo decided to replace himself as chief executive last year, though he remains the majority shareholder.

Sir David Henshaw was replaced as chief executive by Colin Hilton.

It said Anthony Johns would replace him as chief executive.

Corbett was replaced as chief executive by the finance director, Steve Marshall.

He will be replaced as chief executive by G. Kennedy Thompson, 49.