This March, Téthys, the Bettencourt-Meyers' family office, will celebrate its tenth anniversary. Set up in the wake of a lawsuit filed against various individuals whom the family claimed had taken advantage of Liliane Bettencourt's diminishing faculties, its purpose was to professionalise the management of the annual dividends that the Bettencourt-Meyers receive thanks to their 34.76% stake in L'Oréal.

From the outset, Téthys has been managed by Alexandre Benais. He was poached from Lazard, where