While turnover among the nation’s CEOs in February fell to its lowest level in over 13 years, Austin bucked that trend with one of its busiest months ever for chief executive departures.

Across the country, 74 CEO changes were announced in February — the lowest monthly total since December 2004 when 56 CEOs left their posts — according to data from Chicago outplacement consultancy Challenger Gray & Christmas Inc. and Austin Business Journal research.

In Austin, however, the CEO turnstiles…