Filed by Henderson Group plc

This communication is filed pursuant to Rule 425 under the United States Securities Act of 1933

Subject Company: Janus Capital Group Inc.

Commission File Number: 001-15253

Date: March 24, 2017

Janus Henderson Merger Update Presentation

24 March 2017

The attached presentation is published to accompany the merger documents published earlier this week.

*              *              *

Further information www.henderson.com/IR or
Investor enquiries
Miriam McKay	+44 (0) 20 7818 2106
Head of Investor Relations	miriam.mckay@henderson.com
Louise Curran Investor Relations Manager	+44 (0) 20 7818 5927 louise.curran@henderson.com
or
Investor Relations	+44 (0) 20 7818 5310
	investor.relations@henderson.com

In connection with the proposed merger, Henderson has filed a registration statement on Form F-4 with the U.S. Securities and Exchange Commission (SEC), which was declared effective by the SEC on March 21, 2017, containing a proxy statement of Janus Capital Group and other documents regarding the proposed merger. Before making any voting or investment decision, the respective investors and shareholders of Henderson and Janus Capital Group are urged to carefully read the entire registration statement of Henderson, including the proxy statement of Janus Capital Group, and any other relevant documents filed by either company with the SEC, as well as any amendments or supplements to those documents, because they contain important information about Henderson, Janus Capital Group and the proposed merger. The registration statement and other related documents filed by Henderson and Janus Capital Group are available electronically without charge at the SEC’s website, www.sec.gov. Materials filed with the SEC may also be obtained without charge at Henderson’s website, www.henderson.com or at Janus Capital Group’s website www.janus.com, respectively.

Henderson Group plc

47 Esplanade,

Jersey JE1 0BD

Registered in Jersey

No. 101484

ABN 67 133 992 766