Urs Wietlisbach, billionaire co-founder of Swiss private equity giant Partners Group, is establishing an independent investment unit within his family office, marking the first major structural split since the firm launched its shared platform in 2013. The move signals shifting priorities among the three founders who built the firm into a CHF 147bn ($185bn) asset manager.

Wietlisbach joins co-founder Alfred Gantner in preparing succession plans, as both men have large families requiring estate arrangements. The founders are drafting a shareholder agreement to govern future decision-making, a significant change for leaders whose wealth has historically flowed through a single common platform since leaving Goldman Sachs to build Partners Group.

The restructuring comes after Partners Group shares plunged roughly 30% this year, following client withdrawals from evergreen funds that triggered withdrawal caps. Management responded by purchasing over $30m in company stock, while dismissing short-seller Grizzly Research's claim that 40% of investments were significantly overvalued as defamatory and misleading.

Beyond markets, the founders wield notable political influence in Switzerland. Gantner recently negotiated reduced US tariff rates with President Trump, and Wietlisbach advocates for loosening Swiss-EU relations. This succession-driven separation reflects broader challenges facing private equity dynasties managing both wealth preservation and generational transition.