Henderson Group - Holding(s) in Company - UBS

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached:

Henderson Group plc

JE00B3CM9527

AU000000HGG2

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

X

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to thenotification obligation:

UBS Global Asset Management (Traditional Entities)

4. Full name of shareholder(s)  (if different from 3.):

UBS Global Asset Management (Australia) Ltd

5. Date of the transaction and date onwhich the threshold is crossed orreached:

15 June 2012

6. Date on which issuer notified:

20 June 2012

7. Threshold(s) that is/are crossed orreached:

3%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

No previous disclosure

No previous disclosure

34,858,309

-

34,858,309

-

3.15%

JE00B3CM9527

AU000000HGG2

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/Conversion Period

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date

Exercise/Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

34,858,309

3.15%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable:

UBS Global Asset Management (Australia) Ltd - 34,858,309 - 3.15%

Proxy Voting:

10. Name of the proxy holder:

UBS Global Asset Management on behalf of a number of clients

11. Number of voting rights proxy holder will ceaseto hold:

12. Date on which proxy holder will cease to holdvoting rights:

13. Additional information:

14. Contact name:

Konstantina Georgaki / Zuzana Gorogova

15. Contact telephone number:

+41 44 239 6225