ARM.L Regulatory News (ARM)

ARM Holdings plc

11 February 2013

ARM Holdings plc (the "Company") announces that, following the significant out- performance of ARM against an international peer group over the last 3 years, the relevant performance conditions under the Long Term Incentive Plan ("LTIP") were satisfied in full, giving rise to the vesting of 200% (plus dividend shares) of the conditional awards made in 2010. Details of the number of shares vesting and of shares sold automatically in order to satisfy tax liabilities are listed below.

In addition shares representing 50% of annual bonus earned in respect of the financial year ended 31 December 2009 and awarded in February 2010 have been released under the Deferred Annual Bonus Plan ("DAB"). Under the DAB, 50% of bonus earned is paid in cash and 50% is compulsorily deferred into shares which vest 3 years after the award date. The relevant performance conditions were fully satisfied and matching shares have been triggered in the ratio of 2:1 in respect of these shares.

The LTIP vesting and DAB release took effect on 8 February 2013

*The price at which the tax shares are sold will be confirmed separately

2013 LTIP and 2012 Deferred Annual Bonus ("DAB") Awards

Also with effect from 8 February 2013 annual conditional awards were made under the LTIP and deferred shares were awarded under the DAB in relation to performance during the financial year ended 31 December 2012 to directors and PDMRs as follows:

The mid market closing price on 7 February 2013, being the business day prior to the date of these awards, was 924.50 pence per share.

Under the DAB, the deferred shares and any matching shares earned (which would be subject to achievement of an EPS performance condition) will normally be released 3 years from the date of award. Under the LTIP, the vesting of shares conditionally awarded is subject to achievement of a TSR performance condition and they will normally vest 3 years from the date of award.

ENDS