Health companies have produced the most chief executive officer turnovers of all sectors with 151 departures since the beginning of the year, according to a study from Challenger, Gray & Christmas Inc. In comparison, year-to-date CEO departures for government and nonprofit organizations, financial firms and the computer industry were 98, 92 and 77, respectively. In July, turnover among hospitals, imaging software developers and medical diagnostic manufacturers climbed to 34 CEO departures, 17 of which came from hospitals and systems.

In all sectors, retirement was the most common reason for leaving in July, as 41 retiring CEOs brought the year-to-date total to 162. Resignation followed with 30, but is the most used reason so far in 2013 with 202 CEO departures.

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