The contracts extend across numerous roles, including deputy managers and senior analysts, Money Marketing understands.
Henderson said last week that it is to pay up to £2.9m in cash and £1.34m through 1.65 million new ordinary shares to lock in some New Star directors and staff until September 30.
A Henderson spokesperson says: “We can confirm that some people are coming over purely for the transition to help with areas like back-office and general merging. There will also be those who are initially here for a period of time but may be needed in the longer term and, in that case, their role will be discussed.”
Skerritt Consultants head of investments Andrew Merricks says: “There are bound to be departures on both sides as the merger is likely to result in some teething problems.”