Publication of ARM Holdings plc's Annual Report

ARM HOLDINGS PLC

1 March 2013

For immediate release

Publication of ARM Holdings plc's Annual Report 2012

ARM Holdings plc announces that on 28 February 2013 it published its Annual Report for the year ended 31 December 2013 on the company's website at www.arm.com/ir. The Annual Report is also being sent to the National Storage Mechanism of the UK Financial Services Authority.

A hard copy of the Annual Report 2012 is being sent to those shareholders who have elected to continue to receive paper communications. A hard copy of the Circular incorporating Notice of the Annual General Meeting to be held on 2 May 2013 is also being sent to all shareholders at their addresses on the register.

The unaudited Preliminary Results for the year ended 31 December 2012 were announced on 5 February 2013.

In accordance with the requirements of Rule 4.1 of the Disclosure and Transparency Rules of the UK Financial Services Authority, Appendix 1 to this announcement contains a description of the principal risks and uncertainties affecting the Group and Appendix 2 contains a Directors' responsibility statement.

ARM Holdings plc also announces that it has filed with the Securities and Exchange Commission an Annual Report on Form 20-F including audited financial statements for the year ended 31 December 2012.

All of these documents are available online at ARM's website at www.arm.com/ir and the Annual Report on Form 20-F is also available at www.sec.gov.

Shareholders are able to request a hard copy of the 2012 Annual Report free of charge, subject to availability, as follows:

UK - by calling +44(0) 1628 427850 or writing to ARM Holdings plc, Liberty House, Moorbridge Road, Maidenhead, Berkshire SL6 8LT UK.

US - by calling 1-800-555-2470 or writing to Proxy Services Corporation at 200A Executive Drive, Edgewood, NY 11717 USA.

Patricia Alsop

Company Secretary

1 March 2013

Appendix 1

Principal risks and uncertainties

1. Our business and future operating results may be adversely affected by a challenging macroeconomic environment and other events outside our control.

2. We depend largely on a small number of customers and products.

3. We operate in the intensely competitive semiconductor industry.

4. Our business will be adversely affected if we do not effieiently manage the significant changes in the number of our employees and the size of our operations.

5. We may have to defend ourselves against third parties who claim that we have infringed their proprietary rights.

6. A successful patent infringement claim or a significant damage award would adversely impact our operating results.

A more detailed description of the risks facing the company is included in the Annual Report on Form 20-F.

Appendix 2

Directors' Responsibility Statement

Each of the directors whose names and functions are listed below, confirm that, to the best of each person's knowledge and belief:

1. The Group financial statements which have been prepared in accordance with IFRSs as adopted by the European Union, give a true and fair view of the assets, liabilities, financial position and profit of the Group; and

2. The Directors' report and the Financial review and the Risk management sections in the Annual Report include a fair review of the development and performance of the business and the position of the Group, together with a description of the principal risks and uncertainties that it faces.

Name Function

Sir John Buchanan Chairman

Warren East Chief Executive Officer

Tim Score Chief Financial Officer

Simon Segars President

Mike Inglis Chief Commercial Officer

Mike Muller Chief Technology Officer

Andy Green Independent Non-Executive Director

Larry Hirst Independent Non-Executive Director

Kathleen O'Donovan Senior Independent Director

Janice Roberts Independent Non-Executive Director

Philip Rowley Independent Non-Executive Director