Arthur Heilbronn checks every box of someone groomed to oversee one of the world’s most powerful multi-generational fortunes.

Deep family ties? Check. Ivy League pedigree? Check. Wall Street credentials? Check.

Now, there are growing signs the 38-year-old scion of the family behind Chanel is moving closer to the top of the firm managing its $90 billion fortune.

Since joining Mousse Partners — one of the world’s largest and most discreet family offices — six years ago, Heilbronn has assumed management roles overseeing his family’s investments in real estate, banking, and media. In the latest sign of his rise, the Harvard Business School graduate and former Goldman Sachs banker became a director earlier this year for one of Mousse’s key holding companies, filling the role vacated by

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