Vontobel has bought up 60% of TwentyFour, with the ten partners retaining 40% ownership between them.
London-based TwentyFour was founded in 2008 and specialises in fixed income investing. It has £4.3bn in assets under management.
The firm runs six public funds and also offers bespoke portfolios.
“TwentyFour will remain autonomous, run by the partners with full control over day-to-day business decisions,” the firm said in a statement. “Our investment strategies will continue to be managed by the existing team, retaining the same investment process. Continued attention will be paid to delivering strong investment returns while being mindful of capacity constraints. To further strengthen alignment, the partners have agreed to reinvest a significant share of their consideration into existing TwentyFour funds.”
