Advisius

Advisius demonstrates notable expertise acting for ultra-high-net-worth individuals and family-owned businesses on tax law issues. Heading the practice, Laurent Donnay de Casteau acts for corporate and private clients on the tax structuring of investments, M&A, and reorganisations. Jean Meeùs advises on estate planning, remuneration, and fund and investment structuring. Joël de Maere d’Aertrycke is a further key contact for management incentive plans, family business succession, and estate planning. Werner Heyvaert joined the firm in May 2026.