The management buyout deal was led by Petronella West, director of private clients, alongside chief investment officer Peter Lowman and wealth manager Nicholas Rolf. West’s title has already been updated as CEO on the Investment Quorum website.
Robertson would not disclose the sum of the sale.
Speaking to Portfolio Adviser, Robertson said: “Having run the firm for 18 years, it feels like it is about the right time.
“I enjoyed my time there immensely and while it was a difficult decision to make, I will remain a consultant to the board.”
Robertson said he is working on a new business venture, which he plans to launch later this year.
“I’ve enjoyed growing the business but after 18 years there and 30 years as an adviser, I have decided to pursue something else,” he said.
“I’m not looking to be a wealth manager or adviser anymore although I have a new online business idea within financial services.”