# Financière Dioclès Financière Dioclès is a Multi Family Office based in Paris, France. ## Overview - **Organization type:** Multi Family Office - **Headquarters:** Paris, France - **Region:** Europe - **Address:** 45 avenue George V, 75008 Paris, France - **Founded:** 2011 - **Assets under management:** Undisclosed - **Website:** financiere-diocles.com - **LinkedIn:** https://www.linkedin.com/company/financiere-diocles ## Regulatory record - **Reports private funds:** No ## About Financière Dioclès opened in Paris in 2011 under founder Romarin Billong, an ESCP alumnus who moved from professional football into private banking. The firm was built to serve a limited number of affluent families and high-earning professionals seeking independent, coordinated wealth management. Billong’s own background, combined with relationships in the French wealth management network — including co-founder Pierre-Yves Lagarde of Imani Family Office — gave the firm its initial anchor. The firm advises across liquid portfolios, real estate, and private markets. Its investment strategy spans direct co-investments and SPVs, fund-of-funds commitments, and secondary/ special-situation positions. Geographically, the mandate covers Europe and North America. The advisory model is deliberately modular — clients can engage the team for wealth planning only, or for integrated asset management across multiple asset classes — and the firm acts as a central coordinator of external legal, tax, and banking specialists. Financière Dioclès operates from 45 avenue George V in the 8th arrondissement of Paris and has been recognized repeatedly by Décideurs Magazine in its rankings of independent multi-family offices (2014–2021). The practice remains lean; a recent career posting identifies Iliès Berdal as a wealth management advisor on the team. The firm maintains real estate exposure through vehicles such as SCI JEMA, a residential holding in Cholet, Maine-et-Loire. What distinguishes the practice is its supplementary asset base — the firm’s holdings extend beyond traditional financial instruments into curated alternative stores of value, including a mechanical watch collection and a wine collection. This orientation toward tangible, passion-linked assets, paired with a deliberately small client roster, creates a family-office culture closer to private-wealth concierge than to institutional asset management. ## Sectors - Real Estate - Private Equity - Secondaries & Special Situations ## People - Romarin Billong — Founder - Iliès Berdal — Conseiller en gestion de patrimoine ## Questions ### How does Financière Dioclès source investment opportunities? The firm coordinates a network of external tax, legal, and banking specialists, acting as a central orchestrator for each client family. It does not disclose a proprietary sourcing engine, but its model relies on building curated access to direct co-investments, fund commitments, and special-situation deals through professional relationships rather than a centralized deal-origination team. ### Is Financière Dioclès a single-family office or does it serve multiple families? It is structured as a multi-family office serving a limited number of entrepreneurial and high-net-worth families. Its website explicitly differentiates the model from very large fortunes that maintain their own dedicated single-family offices. ### What investment structures does the firm typically use? Financière Dioclès participates in direct co-investments and special-purpose vehicles, fund-of-funds commitments, real estate holdings (including through dedicated vehicles such as SCI JEMA), and secondary- and special-situation transactions, per its own classification of investment types. ### What is Romarin Billong’s professional background? Billong played professional football for AS Saint-Étienne, Olympique Lyonnais, and AS Nancy Lorraine before moving into private banking. He holds an MS in Wealth Management from ESCP (2003) and founded Financière Dioclès in 2011. ### How is the firm’s real estate exposure structured? The firm holds residential real estate through SCI JEMA, a property vehicle located in Cholet, Maine-et-Loire. Real estate advisory is also one of the four core service pillars offered to client families, alongside financial, wealth-planning, and administrative services. ## Related profiles - [Andromède](https://altss.com/profile/andromede) - [Annex Wealth Management](https://altss.com/profile/annexwealthmanagement) --- Last updated: 2026-06-03T20:00:00.000Z Canonical page: https://altss.com/profile/financiere-diocles-family-office Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology