Henderson Group - Acqn Horizon Invmt Mngmnt France

Acquisition of Horizon Investment Management France

17 July 2012

Henderson Group plc ('Henderson Group') announces that it has acquired Horizon Investment Management France SAS ('Horizon'), a privately owned French property asset management business, with gross assets of €3 million. Horizon's property experience complements Henderson Group's expertise within retail property.

Founded in 1998, Horizon focuses on advising on asset management in the French real estate market and comprises a €250 million Luxembourg closed-ended real estate fund and a number of asset management contracts to manage 25 properties.

Henderson Group plc

47 Esplanade

St Helier

Jersey JE1 0BD

Registered in Jersey

No. 101484

ABN 67 133 992 766

Notes to editors

About Henderson Group plc

Henderson Group plc ('Henderson Group' or 'Group') is the holding company of the investment management group Henderson Global Investors ('Henderson'). Henderson Group's principal place of business is in London and since December 2003 it has been dual-listed on the London Stock Exchange and Australian Securities Exchange ('ASX'). Henderson Group is a constituent of the FTSE 250 and S&P/ASX 200 indices. Since 31 October 2008, the Group has been incorporated in Jersey and tax-resident in the Republic of Ireland.

Established in 1934, Henderson is a leading independent global asset management firm. The company provides its institutional, retail and high net-worth clients with access to skilled investment professionals representing a broad range of asset classes, including equities, fixed income, property and private equity. Henderson is one of Europe's largest investment managers, with £66.7bn assets under management and employed 1,056 people worldwide (as at 31 March 2012).

About CHESS Depositary Interests

In this announcement, the term "shareholders" refers to all holders of Henderson Group plc shares, including those whose holdings are in the form of CHESS Depositary Interests on the Australian Securities Exchange.

CHESS Depositary Interests, or CDIs, are a way of allowing securities of foreign companies to be traded on the Australian Securities Exchange. CDIs afford shareholders all the same direct economic benefits as ordinary shares, like the right to dividends and the right to participate in rights offers.