** Shares of biotech co Repligen Corp RGEN.O fall 9.8% to
$128.83
** Co says board has approved the planned transition of Tony
Hunt from CEO to executive chair, effective Sept. 1
** Says its board has appointed Olivier Loeillot, who joined
RGEN in 2023 as president and chief commercial officer, as CEO
to succeed Tony Hunt, also effective from Sept. 1
** Hunt has served as RGEN's CEO since May 2015
** This announcement is not a complete surprise, albeit a
bit sooner than expected, says Stephens analyst Jacob Johnson
** "Still, Tony was synonymous with RGEN and today may
reveal how large the Tony Hunt premium was," Johnson adds
** Including session moves, stock down 28% YTD
(Reporting by Sneha S K in Bengaluru)
((Sneha.SK@thomsonreuters.com;))