David L. Grange plans to retire as chief executive officer of PPD, Inc.and a member of its board of directors. Mr. Grange joined the board in 2003 and served as an independent director until mid-2009 when he became chief executive officer. His retirement will be effective May 18, 2011, the date of the company’s annual shareholder meeting. “I joined PPD as its chief executive officer in July 2009 to bolster the executive management team alongside Fred Eshelman in his new role as executive chai...