PSigma was formed in February 2007 as a joint venture between the founding partners (50%) and Punter Southall Group (50%) and has since then amassed £750m AUM.
Both Punter Southall and the directors at PSigma stressed there would be no change to key investment teams and managers and said it would be "business as usual".
As a result of the transaction, Bill Mott and Ian Chimes, two of PSigma’s founding partners, have also become significant shareholders in the Punter Southall Group.
CEO of Punter Southall, Jonathan Punter, said the deal had reinforced the scope and scale of investment services the group offers clients.
"Our business keeps growing and this agreement is part of the strategy to provide a unique range of financial services. Over the past five years we have enjoyed a creative and fruitful relationship with Bill and Ian and look forward to working together for continued future success," Punter added.
