Sienna Gestion – Thierry Vallière takes over from Xavier Collot

mardi 25 août 2026
Appointment – Thierry Vallière joins Sienna Gestion as executive board chairman, succeeding Xavier Collot, who has left the asset manager following its recent takeover by Malakoff Humanis, News Asset Pro has learned.
Image de Sienna Gestion – Thierry Vallière takes over from Xavier Collot

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