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Billionaire Partners Founder Moves to Split Family Office

Reported by Bloomberg
Jun 14, 2026· 2 min read
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Key Takeaways
  • • Urs Wietlisbach, one of three billionaire founders of Swiss private equity firm Partners Group Holding AG (PGHN SW), is carving out an independent unit within the family office that has managed their fortunes for over a decade, according to Bloomberg.
  • • Jascha Forster, current chief investment officer of Swiss billionaire Thomas Schmidheiny's family office Spectrum Value Management Ltd, is set to lead the new entity, per people familiar with the matter.
  • • The move is described as an early sign of Wietlisbach's succession planning, rather than a change at the Partners Group firm itself.
Summary
Urs Wietlisbach, one of the three billionaire founders of Swiss private equity firm Partners Group Holding AG, is splitting off an independent unit from the family office at PG3 AG that has managed the founders' fortunes for more than a decade, Bloomberg reported on June 14, 2026. The move is being read as an early step in the executive's succession planning.

According to people familiar with the matter cited by Bloomberg, the new entity will be led by Jascha Forster, currently chief investment officer of Spectrum Value Management Ltd, the family office of Swiss billionaire Thomas Schmidheiny. The report does not specify the size of the carved-out unit, its assets under management, or the timing of the transition.

The development centers on the founders' family office structure rather than the operations of Partners Group, the Zug-based private markets manager listed on the SIX Swiss Exchange under the ticker PGHN. Bloomberg's account is based on sourcing and the report does not include on-the-record comment from the firms involved.

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Sources

1 outlet

AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Bloomberg Billionaire Partners Founder Moves to Split Family Office