BUZZ-Compass: falls after finance chief steps down
** Shares (Berlin: DI6.BE - news) of world's biggest catering firm -1.7 pct after finance chief steps down, bottom of FTSE 100
** Co says Finance Director Johnny Thomson is set to leave the company by the end of the year
** Thomson's departure marks the second recent key executive change; follows long-time CEO Richard Cousins' death in a seaplane crash on New Year's eve (RM (LSE: RM.L - news) : justin.varghese.thomsonreuters.com@reuters.net)