Mousse Partners was founded in 1991 by Charles Heilbronn, a Chanel executive and half-brother to its owners, Alain and Gérard Wertheimer.

It is involved in private equity, venture capital, real estate and credit investments.

[2][3][4][5] Mousse Partners is headquartered in the Solow Building in New York City with additional offices in Beijing and Hong Kong.

[3][5] In February 2023, it was reported that the Wertheimer family through Mousse Partners were one of the investors involved in the deal to take Rothschild & Co private.

[6] In February 2024, according to an employee, Mousse Partners was looking at middle market leveraged buyout opportunities in Asia.