St. James's Place, the wealth management group, saw a net inflow of funds of £9.5 billion in 2017 - up 40% from the previous year.
Gross inflows totalled £14.6 billion - up 29% from 2016.
Group funds under management totalled £90.7 billion - an increase of 20%.
Andrew Croft, chief executive, said: "At the heart of this sustained growth is the importance we place on maintaining long lasting relationships with, and between, our partners and clients and serving them well. We continue to see a growing demand for advice and it is therefore also pleasing to report a 7% increase in the number of qualified advisers across our partner businesses.
"Our continuing focus on achieving the best possible outcomes for our clients, through the provision of trusted financial advice and our distinctive investment management approach, gives us confidence that we will continue to grow our business, in line with our objectives, in 2018 and beyond."