Strat & Fi

Strat & Fi

Strat & Fi was founded in 2000 in Paris by Managing Partner Guillaume Lange. The firm grew out of entrepreneurial wealth generated through real estate investment initiatives and financial advisory services. It now serves more than 200 client families, combining wealth management with in-house legal, tax, and private market capabilities. The firm deploys capital across a deliberate trio of asset classes: curated private equity fund commitments, direct real estate club deals, and bespoke multi-asset financial mandates. Its real estate activity is concentrated on prime Paris and the Côte d'Azur, funneled through in-house partner Globalstone, which holds a reported 75% market share in Parisian tax-advantaged property transactions. On the private equity side, Strat & Fi selects first-quartile funds with a minimum three-year track record, targeting net returns above 12%. Its financial management platform spans Luxembourg and French assurance-vie wrappers — the firm reports over €80M allocated to customized mandates within these structures. Strat & Fi operates from a single office at 7 rue Penthièvre in the 8th arrondissement. The firm's inner circle is led by Managing Partner Guillaume Lange alongside Associate Director Charlotte Donahue and Managing Directors Arnaud Bartholin and Philippe Alcaras. Alcaras maintains a professional network that extends to growth-equity partners such as Starquest. The firm also directly owns and manages a portfolio of Parisian luxury residential and hotel assets, including La Sève on Avenue Lowendal and several unnamed high-end residences across the 7th, 8th, and 13th arrondissements. The structural differentiator is vertical integration in real estate. Most multi-family offices stop at fund selection; Strat & Fi acts as merchant developer, property operator, and tax-structuring partner through Globalstone. This allows the firm to originate its own deal flow — over €150M in short-hold merchant properties and €50M in long-duration real estate company assets — and offer clients direct exposure to Parisian hard assets rather than aggregated fund vehicles.