Ydès

Ydès is a law firm — it does not make investment decisions. It advises family offices, owner-managed businesses, and corporate clients on the legal and tax structuring of their investment decisions. Founding partner Jean-Pierre Viennois remains active in firm leadership.

Ydès is an independent French partnership, not affiliated with any international verein or Big Four network. It operates from Lyon and Paris without the lockstep compensation model or cross-border profit-sharing arrangements common among larger French firms. This independence preserves conflict flexibility for its family office and mid-market clients.

Yes. Ydès maintains dedicated tax and private client practices that advise on wealth management structuring, inheritance law, and multi-generational succession planning — a combination that is unusual for a French corporate firm with a full transactional platform.

Publicly available information does not identify specific excluded sectors. As a general-practice independent firm, Ydès takes on matters consistent with its core corporate, tax, employment, and litigation capabilities. It does not practice criminal defense or administrative law.

Ydès does not disclose the wealth origins of its private clients. The firm serves owner-managed businesses and family groups, which in the Rhône-Alpes region typically derive wealth from industrial manufacturing, food and beverage, logistics, and real estate holdings (per regional economic data).