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Single Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 2 SOURCES

Family Office International SA

Geneva-based office (branch of Family Office International SA Inc., Delaware) describing itself as a single family office and club-deal platform for private equity, real estate and VC.

USEFUL FOR Business owners seeking a long-term partner · Co-investors

Family & background

FAMILY
Montandon
HEADQUARTERS
Geneva, Switzerland
FOUNDED
2001

Investment approach

ROUTES
Companies (own capital)
STRATEGIES
Private equityReal estateVenture capitalDirect investments

Overview

Family Office International operates in Geneva as the Swiss branch of Family Office International SA Inc. of Yorklyn, Delaware, registered at Route de Florissant. Its website describes it as a single family office and a club-deal platform that connects ultra-high-net-worth individuals and family offices with private equity, real estate, venture capital and direct investments in operating companies. The site states it has been active since 2001 and selects banks, fund managers and investment strategies for the families it works with.

People

  • Antoine Montandon
    Managing Director and Investment Officer · source

Frequently asked questions

Family Office International SA is a single family office based in Geneva, Switzerland, founded in 2001.

Family Office International SA invests on behalf of the Montandon family.

Family Office International SA invests its own capital into companies. Its stated asset mix includes private equity, real estate, venture capital and direct investments.

Family Office International SA invests in Software & SaaS.

Key people at Family Office International SA include Antoine Montandon (Managing Director and Investment Officer).