Och-Ziff has to persuade over one-quarter of shareholders in Whitehead Mann to accept its £25.7m (€38m) before it can push through its first public-to-private buyout.

The $19.5bn (€15.4bn) US hedge fund manager has made its first attempt to lead a public-to-private buyout by offering £25.7m for the UK headhunter, but has so far failed to convince all shareholders.