The specialist financial services firms have combined assets under management of over £500m.
Borehamwood-based Hightree Financial Services has 16 registered individuals and around £400m funds under management.
Financial Management Group, formerly Mellor Associates specialises in wealth management services for private and corporate clients, has five registered individuals and around £110m funds under management.
Investment specialist Total Financial Solutions has advisers covering London, Plymouth, Buckingham, Worcester and Taunton and around £50m in funds under management.
Succession Advisory Services chief executive Simon Chamberlain says: “There is now a solid base of reputable, productive and profitable IFA firms powered by Succession, representing £3.5bn of client assets.”