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Multi Family OfficeInvests through funds, not into companiesLAST VERIFIED Oct 2026 · 5 SOURCES

FONS Family Office Network Service

Also known as FONS SA

Geneva family office (FONS Family Office Network Service SA), co-founded 2003; advises families on wealth structuring, succession and investments and consolidates their accounts.

Identity

HEADQUARTERS
Geneva, Switzerland
FOUNDED
2003

Overview

FONS Family Office Network Service SA is a Geneva family office co-founded in 2003 by lawyer Olivier Brunisholz and former banker Dominique Baignères. It serves entrepreneurs and wealthy private clients with wealth structuring, succession planning, advice on purchases and investments, account aggregation and reporting, and next-generation training. It works through a network of private banks, asset managers, lawyers, tax experts and other providers rather than competing with them.

People

  • Olivier Brunisholz
    Founder · source
  • Dominique Baignères
    Co-founder · source
  • Guillaume Lejoindre
    Independent adviser · source
  • Ignacio García
    Independent adviser · source

Frequently asked questions

FONS Family Office Network Service is a multi family office based in Geneva, Switzerland, founded in 2003.

FONS Family Office Network Service does not publicly state whether it puts its own money into companies or invests through funds.

Key people at FONS Family Office Network Service include Olivier Brunisholz (Founder), Dominique Baignères (Co-founder), Guillaume Lejoindre (Independent adviser) and Ignacio García (Independent adviser).