Henderson Group - Share sale facility conclusion

Conclusion of share sale facility

16 July 2012

As announced on 28 May 2012, Henderson Group (the Company) offered a share sale facility (Facility) to shareholders with 320 or fewer shares.

Following expiry of the notice period, 16,674,461 shares (representing 1.5% of the Company's issued share capital) have been sold under the Facility on behalf of 53,493 participating shareholders. The sale was conducted via a placing to institutional investors. The average price obtained was 95.0482 pence, A$1.4300 or NZ$1.8214 per share.

Payments to participating shareholders are expected to be despatched on or around 25 July 2012.

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.