Casson managed the €154m (£127m) Horizon Pan European Alpha Fund, which has been handed over to Léopold Arminjon and John Bennett.
Stormont has left the €1.73bn (£1.42bn) Horizon Pan European Equity Fund, which he co-managed with Tim Stevenson. The latter will continue as lead manager of the vehicle, with support from three other investment professionals.
Savill’s £57m European Smaller Companies Fund will now be looked after by Henderson’s generalist smaller companies team.
