Henderson Group - Correction to Key dates in 2015

1Q15 Interim Management Statement

28 April

Henderson Group 2015 Annual General Meeting

30 April

Last day for processing requests by ordinary shareholders to convert ordinary shares into CDIs before the record date for the 2014 Final Dividend

30 April (London time)

Last day for processing requests by CDI holders to convert CDIs into ordinary shares before the record date for the 2014 Final Dividend

1 May(Sydney time)

CDIs begin trading on the ASX on an ex-dividend basis

6 May

Ordinary shares begin trading on the LSE on an ex-dividend basis

7 May

Record Date for the 2014 Final Dividend

8 May

Processing recommences for requests by CDI holders to convert CDIs into ordinary shares or by ordinary shareholders to convert ordinary shares into CDIs

11 May

Dividend payment date (subject to shareholder approval at the 2015 Annual General Meeting)

29 May

1H15 Interim Results

30 July

Last day for processing requests by ordinary shareholders to convert ordinary shares into CDIs before the record date for the 2015 Interim Dividend

21 August (London time)

Last day for processing requests by CDI holders to convert CDIs into ordinary shares before the record date for the 2015 Interim Dividend

24 August (Sydney time)

CDIs begin trading on the ASX on an ex-dividend basis

26 August

Ordinary shares begin trading on the LSE on an ex-dividend basis

27 August

Record Date for the 2015 Interim Dividend

28 August

Processing recommences for requests by CDI holders to convert CDIs into ordinary shares or by ordinary shareholders to convert ordinary shares into CDIs

31 August

Dividend payment date

18 September

3Q15 Interim Management Statement

29 October

Further information

www.henderson.com/IR or

Investor enquiries

Miriam McKay

+44 (0) 20 7818 2106 or

Head of Investor Relations

+44 (0) 20 7818 5310

[email protected] or

[email protected]

Louise Curran

Investor Relations Manager

+44 (0) 20 7818 5927

[email protected]