Solomon managed the group until their breakup in late 1965.
She went on to form the group Pure and Simple, also managing the group.
Eventually joined by Andy Taylor in 1982, the pair have managed the group ever since.
Andrew Devigal manages the group, and I asked him if he could talk a little bit about what they do.
For a time he actually did manage the group.
The station offered her brothers a regular slot on condition that Rose sing with them, despite the opposition of their mother, who managed the group.
Spencer Dryden left the drummer's chair to manage the group in 1978.
The Company manages the group as a whole, whilst members' individual activities are managed by their respective agencies.
Cecil took full control over the group in 1929, though Lloyd continued to manage the group.
In 1995 Knowles' father resigned from his job to manage the group.