She began her career as a sell-side and buy-side financial analyst in international banking institutions and continued her career by specializing in business valuation at Ricol Lasteyrie et Associés (now a member of the EY network).

She joined Ledouble as a Project Director and then became a Partner and worked on independent expertise, financial valuation and merger and contribution audits in the financial (banking and insurance), media and services sectors.


  • Independent valuation
  • Business valuation
  • Contribution and merger auditing
  • Litigation assistance and damage assessment 


  • Member of the APEI (Professional Association of Independent Experts)
  • Member of the SFEV (French Society of Valuators)
  • Member of the SFAF (French Society of Financial Analysts)
  • Member of The 100 Women in Finance Foundation (a global network of women professionals in the financial and alternative investment sectors who focus on philanthropic and educational initiatives)

Send an email to Stéphanie Guillaumin