On 9 October 2026, Bloomberg reported that Gérard Wertheimer, 75, one of the two brothers who own Chanel, has set up a family office in Switzerland to look after part of his fortune. The family already runs a large office in New York, Mousse Partners. Why would one of the world’s richest families add another?
The family has not explained, and the report rests on registry filings and people who asked not to be named. But the pattern is a familiar one, and it says a lot about how very large fortunes prepare for the next generation.
What Bloomberg reported
- Two new companies in Geneva. According to Geneva commercial registry filings cited by Bloomberg, at least two investment companies were set up in Geneva in late 2025. Their stated purpose is commercial, financial or real estate transactions. They were set up by Frédéric Pasteau and Julie Bozzo-Gros, a partner at the Geneva law firm Gros & Waltenspühl whose family has close ties to Gérard and to Chanel. The republished versions of the report we read do not name the companies.
- A CHF 34 million building. Earlier in 2026, one of these companies bought an office in central Geneva for CHF 34 million (about $40.8 million), Bloomberg reported. We could not check this purchase in the register ourselves.
- A head, according to anonymous sources. People familiar with the matter told Bloomberg that Pasteau, a former Credit Suisse private banker, was hired a few years ago to run the office. They asked not to be named. Bloomberg noted that his LinkedIn profile lists an unnamed family office as his employer.
- No comment. Pasteau, Bozzo-Gros and Gérard’s representatives did not respond to Bloomberg. Chanel and Mousse Partners declined to comment.
Bloomberg also found an older link: Mousse Partners set up a Geneva company, Mousseknuckle, about a decade ago, which has shown few signs of activity.
The family and its fortune
Chanel is privately owned by the brothers Alain and Gérard Wertheimer, as Reuters describes it. The family’s tie to the brand goes back to 1924, when their grandfather Pierre Wertheimer financed the creation of Parfums Chanel with Coco Chanel. Today Alain, 78, is executive chairman of Chanel Ltd and lists his address in the New York building that houses Mousse Partners. Gérard lives in Geneva; in 2023 the Swiss magazine Bilanz called him Switzerland’s richest resident. According to Bloomberg, he left Chanel’s board in December 2017.
How rich are they? In its report of 9 October 2026, Bloomberg put the family at about $86 billion, citing the Bloomberg Billionaires Index, and Gérard at about $43 billion. It says the family’s combined wealth has more than tripled in a decade, and that Chanel has paid multi-billion-dollar dividends. Treat these as estimates: Chanel is not listed, so no market sets its value.
Mousse Partners: the office that already exists
Mousse Partners was founded in New York in 1991 by Charles Heilbronn, now 71, Gérard’s half-brother. According to Bloomberg, it is the family’s main private investment vehicle, with holdings from Silicon Valley start-ups to the bank Rothschild & Co. It has scores of employees in Manhattan, and Charles’s son Arthur Heilbronn, 40, is among its executives.
In the terms of our single vs. multi family office post, Mousse is a classic single family office: one family, its own staff, kept apart from the operating business. The new Geneva office does not replace it. It adds a second centre, in the city where Gérard lives.
Why rich families run more than one office
There is no single reason, and the Wertheimers have not given theirs. In general, families end up with more than one office for four reasons:
- Geography. Family members live in different countries, with different tax rules, banks, property and legal advisers. An office near the person it serves is easier to run.
- Branches. As a family grows, branches want different things: more risk or less, more philanthropy, different investments. A separate office lets one branch decide for itself without fighting over a shared one.
- Succession. A new office can be built for the next generation before the handover, with its own team and rules. Marc Debois, founder of FO-Next, told Bloomberg the Swiss move looks like “a possible early sign of succession planning”.
- Continuity. Two teams mean less dependence on a few key people, a real risk when most offices are small.
The cost is duplication: two teams, two sets of systems, two buildings. Our post on what a family office costs shows why that only makes sense at a very large scale.
What a new office can signal
Wharton professor Raphael Amit told Bloomberg that succession is “the most vulnerable time in the life of any family”. A Citi survey of 351 family office clients, cited by Bloomberg, found that about a third expect a change of leadership within five years.
Against that background, the Geneva signals are worth reading carefully. A hired head, new companies and a CHF 34 million building point to something permanent, not a temporary account. The questions to watch are who sits on the new companies’ boards, whether younger family members appear, and how much money moves there. None of that is public yet.
A fair caveat
This story rests on one primary report, by Bloomberg, plus the registry filings it cites. The name of the office’s head comes from anonymous sources, and the family has said nothing. The wealth figures are estimates for a private company. We do not know how much of the fortune the Swiss office will manage, and a new office does not prove that a handover is near.
Five lessons to take away
- One family can need more than one office. Different countries and branches have different needs.
- An office is a governance choice, not only an investment one. Who it serves matters as much as what it buys.
- Watch the quiet signals. Registry filings, buildings and hires often come before any announcement.
- Build the structure before the handover. A succession is easier when the vehicle already exists.
- Two offices cost twice. Duplication needs a clear reason and a large enough fortune.
Questions to bring to your advisors
Does everyone in our family want the same things from our office? If one branch wanted its own office, how would assets, staff and costs be split? Who would run our office after the next handover, and when should that person start? These are questions to bring to your advisors, not advice.