# Elyseum Family Office

Elyseum Family Office is a Multi Family Office based in Geneva, Switzerland.

## Overview

- **Organization type:** Multi Family Office
- **Headquarters:** Geneva, Switzerland
- **Region:** Europe
- **Address:** 7 Rue des Alpes – 1201 Genève, Switzerland
- **Founded:** 2011
- **Assets under management:** Over €2.5 billion (per firm website)
- **Website:** elyseum-investment.com
- **LinkedIn:** https://www.linkedin.com/company/elyseum-investment

## Regulatory record

- **CRD number:** 291324
- **SEC file number:** 802-112215
- **Registration status:** Registered
- **Reports private funds:** Yes
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/291324

## About

Elyseum Investment was established in 2011 by Yann Thomas, formerly Managing Director at SGAM Alternative Investments, and Etienne Mouthon. The founders built the platform from their own entrepreneurial wealth and positioned it as an independent multi-family office serving other families and entrepreneurs. The firm remains management-owned and operates from four European offices. Investment activity centers on private equity, real estate private debt and value-add equity, plus direct co-investments in infrastructure and tangible assets. Confirmed holdings include the Manchester Airport Hotel Portfolio, Western Europe, USA value-add mixed-use assets, HEMS Helicopter Fleet in France, Spain, LCI co-investment helicopter fleet and Flexam Tangible Asset Income Fund fleet. The firm also holds positions in renewable energy producer Langa International and the Windward Offshore wind project. Geographic exposure spans Europe, North America and Africa. Investment stages include buyout, growth and venture capital. The platform reports a combined portfolio exceeding €2.5 billion. It maintains a business partnership with 123Venture through RIVE Private Investment and works with Libra Group on helicopter co-investment vehicles. Philanthropic activity includes support for the Lead Like a Girl programme in South Africa via The Beast Foundation. No dated operational events from the last 24 months appear in public sources. Elyseum Investment functions as a management-owned independent group rather than a captive single-family office. This structure allows it to offer discretionary portfolio management and financial engineering services to multiple external families while deploying its own capital alongside them in co-investment vehicles.

## Sectors

- Energy Transition & Renewables
- ClimateTech
- Mobility & Transportation

## Offices

- Paris, France
- London, United Kingdom
- Luxembourg

## People

- Yann Thomas — Founder
- Etienne Mouthon — Founder

## Questions

### How does Elyseum source proprietary deal flow?

The firm leverages its network of business partners including 123Venture and Libra Group. It also draws on relationships developed through prior roles at SGAM Alternative Investments and through its own direct asset platforms in infrastructure and real estate.

### Does Elyseum participate in fund commitments or only direct deals?

Elyseum executes both fund commitments and direct co-investments through SPVs. Its private equity and infrastructure activity includes direct holdings in renewable energy, aviation assets and rail equipment alongside external managers.

### What investment stages does Elyseum typically target?

The firm targets buyout, growth and venture capital stages. Its infrastructure and real estate mandates focus on value-add and operational improvement rather than early-stage development.

### What is Elyseum's known posture on co-investments alongside external GPs?

The firm regularly structures co-investment vehicles with partners such as Libra Group on aviation assets and with 123Venture through RIVE Private Investment. It also deploys capital directly into renewable energy and real estate projects.

## Related profiles

- [Elsasser & Partner AG](https://altss.com/profile/elsasser-partner-ag)
- [Elysia Capital](https://altss.com/profile/elysia-capital-stefano-buono-family-office)

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Last updated: 2026-06-03T20:00:00.000Z

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