# Ydès

Ydès is a Law Firm based in Lyon, France.

## Overview

- **Organization type:** Law Firm
- **Headquarters:** Lyon, France
- **Region:** Europe
- **Address:** Lyon, France
- **Founded:** 1990
- **Assets under management:** Undisclosed
- **Website:** www.ydes.com
- **LinkedIn:** https://www.linkedin.com/company/yd%C3%A8s-avocats

## Regulatory record

- **Reports private funds:** No

## Offices

- Paris, France

## People

- Jean-Pierre Viennois — Founding Partner

## Questions

### Who runs investment decisions at 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.

### How is Ydès structured compared to other French law firms?

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.

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Last updated: 2026-05-30T19:51:07.003Z

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