Henderson Group - Dividend Rate

Dividend rate

6 May 2011

Henderson Group plc wishes to confirm that shareholders on the register at 5.00pm today, the Record Date, will be entitled to a final dividend in respect of the financial year ended 31 December 2010 of 4.65 pence per ordinary share.

For holders of CHESS Depositary Interests (CDIs), the A$ or the NZ$ equivalent will be 7.180670 cents* (Australia) and 9.734729 cents* (New Zealand) per CDI respectively.

The dividend will be paid on 27 May 2011.

The timetable is as follows:

Record Date for dividend Friday 6 May

Processing recommences for requests by CDI holders toconvert CDIs into ordinary shares and by ordinaryshareholders to convert ordinary shares into CDIs Monday 9 May

Dividend payment date Friday 27 May

\* The exchange rates that have been applied in translating the dividend amount are as follows: £1 = A$ 1.544230 and £1 = NZ$ 2.093490.

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