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CompanyFranceUpdated Apr 5, 2026
Elyseum Family Office

Elyseum Family Office

Elyseum Family Office: Investor, Limited Partner • focus on Private Equity, Real Estate • active in Europe, North America • offices in France, United Kingdom • AUM $2.5B.

Company Profile

Elyseum Investment is an independent investment group established in 2011, dedicated to delivering long-term value through a focus on Private Equity, Real Estate, and Family Office services. The firm manages a portfolio exceeding €2.5 Billion, spread across Europe and North America. Their investment philosophy emphasizes a defensive approach, capital preservation, and the generation of absolute returns through stringent investment criteria, thorough due diligence, and continuous risk monitoring.

The firm was founded by Yann Thomas and Etienne Mouthon, who have built the group on core values of trust, transparency, and alignment of interests with their institutional and family office clients. Elyseum Investment is committed to responsible investment, integrating Environmental, Social, and Governance (ESG) factors into its operations and fostering an internal culture of accountable engagement for over a decade.

In Private Equity, Elyseum Investment specializes in defensive and decorrelated investments, with a particular emphasis on sustainable infrastructures and tangible assets, including energy transition and transportation assets. Their Real Estate activities concentrate on private debt and value-add equity investments in asset classes that benefit from long-term trends or demonstrate strong resilience. For Family Office clients, they provide dedicated investment and financial engineering services to help optimize assets and achieve long-term objectives through a 360° wealth management approach.

Notable investments include a €20 Million investment in renewable energy producer Langa International and participation in the Windward Offshore project, a strategic initiative for the offshore wind industry. The firm also financed a hotel portfolio in Manchester airport. Their team leverages extensive expertise and a skilled network to actively manage portfolios and optimize value creation for investors.

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