# Onyx & Cie

Onyx & Cie is a Multi Family Office based in Geneva, Switzerland.

## Overview

- **Organization type:** Multi Family Office
- **Headquarters:** Geneva, Switzerland
- **Region:** Europe
- **Address:** Geneva, Switzerland
- **Founded:** 1993
- **Assets under management:** Undisclosed
- **Website:** onyx-cie.ch
- **LinkedIn:** https://ch.linkedin.com/company/onyx-&-cie-sa

## Regulatory record

- **Reports private funds:** No

## About

Onyx & Cie was founded in 1993 by a Swiss family of lawyers, evolving from the Croce & Associés legal network into an independent multi-family office. The firm remains fully owned by members of the Croce family, anchoring its investment and advisory services to a legal practice with offices in Geneva, London, Singapore, and Shanghai, alongside a New Zealand trust company. The firm blends traditional wealth administration with active capital deployment across asset classes including private equity, direct co-investments and SPVs, hedge funds, and real estate. It also commits to collectibles and passion assets. Its geographic reach spans Europe, Asia, and Oceania. Detailed personnel and asset totals remain private; the firm does not publish AUM or fund-level deployment figures. Its website confirms a structure that layers wealth-management advisory, group legal services, and a dedicated concierge division covering real estate, yacht, and aircraft administration. Onyx & Cie is a member of the Swiss Association of Asset Managers (ASG), aligning with incoming LSFin and LEFin regulatory standards adopted since 2020. No major operational milestones from the last 24 months are publicly available. The firm's structural distinction lies in its integrated architecture: a single-family legal practice operates both as the multi-family-office parent and as a cross-border law firm and offshore trust company. This alignment means client legal, tax, and structuring work — spanning trusts, holding companies, and succession plans — sits under the same ownership as the entity managing the investments, a configuration rare among independent Swiss multi-family offices.

## Sectors

- Luxury
- Real Estate
- Private Equity
- Hedge Funds

## Offices

- London, United Kingdom
- Singapore
- Shanghai, China

## People

- Manuela Robutti-Croce — Responsible for Data Processing

## Questions

### Who runs investment decisions at Onyx & Cie?

Onyx & Cie is governed by its board, drawn from the Croce family's Swiss legal practice. Manuela Robutti-Croce serves as the named principal for data-protection matters. Specific CIO or investment-committee names are not disclosed publicly; the firm's website emphasizes a lawyer-led, family-based governance structure.

### How does Onyx & Cie source deals?

The firm draws on its parent legal network — with offices in Geneva, London, Singapore, and Shanghai — for proprietary cross-border structuring and transaction referrals. Additionally, its website states that it provides clients access to an international network of partner specialists chosen for excellence.

### Is Onyx & Cie structured as a single family office or does it operate more like a multi-family office?

It is a multi-family office. Though wholly owned by the Croce family and its law practice, the firm serves multiple European and Asian high-net-worth families, offering asset management, tax and estate planning, concierge services, and philanthropy administration.

### Does Onyx & Cie maintain philanthropic structures, and how are they separated?

Philanthropy is listed as a dedicated family-office service line alongside legal, concierge, and wealth-management functions. The firm integrates it under the same multi-family-office umbrella without publicly describing a separate foundation, relying on the Croce & Associés trust company in New Zealand for vehicle structuring.

### Which sectors does Onyx & Cie explicitly avoid?

No explicit exclusions are published beyond standard Swiss regulatory compliance. The firm confirms ESG awareness as a listed technology focus and is positioned under the incoming LSFin/LEFin framework, which introduces suitability and transparency obligations but not sector-based prohibitions.

### How is Onyx & Cie related to Croce & Associés?

Onyx & Cie SA is part of the Croce & Associés group, which includes a law firm with offices in Geneva, London, Singapore, and Shanghai, a wealth-management entity, and a New Zealand-based trust company. All are fully owned by members of the same Swiss family of lawyers.

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Last updated: 2026-08-11T02:43:31.692Z

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