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Multi Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 3 SOURCES

Also known as Lemantrust, Lemantrust Family Advisors

Nyon multi-family office (Lemantrust SA), incorporated 1990 as its founding family's office and still family-owned; FINMA-authorised independent asset manager.

USEFUL FOR Co-investors

Identity

HEADQUARTERS
Nyon, Switzerland
FOUNDED
1990

Investment approach

ROUTES
Companies (own capital)

Overview

Lemantrust SA was incorporated in 1990 as a family office giving its founding family a vehicle to oversee and grow its wealth, and it remains owned by that family. It later extended wealth-management and family-office services to a limited number of other families and now describes itself as a multi-family office. It is an independent asset manager authorised by FINMA, supervised by AOOS and audited by BDO, with offices in central Nyon.

Investment thesis

Secure, preserve and enhance client families' wealth over a long-term horizon, including sustainability goals, next-generation structures and philanthropy.

People

  • Georges Muller
    Founder · source
  • Kostia G.-A. Muller
    Founder · source
  • Ali Hage Hassan
    Director · source
  • Philippe Jacquemoud
    Board Member · source

Frequently asked questions

Lemantrust SA is a multi family office based in Nyon, Switzerland, founded in 1990.

Lemantrust SA invests its own capital into companies.

Lemantrust SA invests in Real Estate & PropTech and HealthTech.

Key people at Lemantrust SA include Georges Muller (Founder), Kostia G.-A. Muller (Founder), Ali Hage Hassan (Director) and Philippe Jacquemoud (Board Member).