Q1 2005 Results Announcement Conference Call Invitation

ARM Holdings plc

cordially invites you to participate in a
CONFERENCE CALL

on Tuesday 19 April, 2005
following the 7.00am announcement of
its Q1 Results Statement
(The press release will be available after 8.00am from www.arm.com)

Hosted by:

Sir Robin Saxby, Chairman
Warren East, Chief Executive Officer
Tim Score, Chief Financial Officer

Time:

1.30pm BST
2.30pm CET
8.30am EDT

Dial In Numbers:

There will also be a live simultaneous audio webcast available at www.arm.com

If you cannot attend, you can listen to a taped recording which will
be available approximately 1 hour after the call ends for 5 days.

UK/Continental Europe: +44 20 7081 9440
(Account Number: 130866
Recording Number: 567858)

US +1 866 717 8634
(Account Number: 130866
Recording Number: 567858)

If you have any queries, please contact:

Anna Bateman
Financial Dynamics
Tel: +44 20 7831 3113
Anna.bateman@fd.com