Appointment of new Chairman

21 March 2012

FOR IMMEDIATE RELEASE

ARM HOLDINGS PLC - APPOINTMENT OF NEW CHAIRMAN

ARM Holdings plc is pleased to announce the forthcoming appointment of Sir John Buchanan as Chairman of the Board with effect from 3 May 2012. He is currently Chairman of Smith & Nephew plc, Deputy Chairman of Vodafone Group Plc, Senior Independent Director of BHP Billiton plc and Chairman of the International Chamber of Commerce (UK).

There are no further disclosures pursuant to paragraphs 9.6.13(1) to 9.6.13(6) of the Listing Rules in relation this appointment.

As was announced at ARM's 2011 AGM, Doug Dunn intends to retire at the AGM to be held on 3 May 2012. John Buchanan will be appointed on the same date and will take over as Chairman immediately following the AGM.

Doug Dunn, Chairman said:

"It has been a pleasure and a privilege to serve as a member of the ARM board since 1998 and as Chairman since 2006. I am very pleased that John has agreed to succeed me as Chairman of ARM when I retire, as planned, in May and to know that I will be leaving with a strong and very able board in place."

Warren East, CEO said:

"I am delighted to welcome John to the ARM Board as Doug's successor and look forward to working closely with him. He has a wealth of international business experience gained through his executive and non-executive roles with a number of leading FTSE100 companies. I would also like to take this opportunity of thanking Doug on behalf of the Board for his excellent contribution as a non-executive director and as Chairman and to wish him well for the future."

John Buchanan said:

"I am delighted to be joining ARM as the Company builds its impressive global business and I look forward to working with the Board and the wider team."

CONTACTS:

Sarah West/Anne Bark Tim Score/Ian Thornton

Brunswick ARM Holdings plc

+44 (0)207 404 5959 +44(0)1223 400796

ENDS