Actelion Ltd will announce the half year financial results 2008 on Tuesday, 22 July 2008, at 07.00 hrs CEST / 06.00 hrs BST / 01.00 a.m. EDT.

To discuss the results, Actelion will host an Investor Conference Call / Webcast as follows:

Date/Time:

22 July 2008       15.30 hrs – 16.15 hrs   Basel (CEST) 
                         14.30 hrs – 15.15 hrs   UK (BST)
                         09.30 hrs – 10.15 hrs   US (EDT)

Conference Call Connect #:
Dial-in participants should start calling the number below 10-15 minutes before the conference is due to begin.

Dial:
Europe:           +41 44 580 64 03
UK:                 +44 207 10 86 206
US:                 +1 866 92 86 044

Participant’s mode:
Listen-Only with possibility to open individual lines during Q&A session. Participants will be asked for their Name and Company.

Webcast Access:
Webcast participants should visit the Actelion website 10-15 minutes before the webcast is due to begin. If you experience any access problems go directly to the URL:

Participant’s mode:
Listen-Only with possibility to ask individual questions by clicking on the Q&A button. Participants will be asked to provide their Name and Company.      

Webcast Replay:
The archived Investor Webcast will be available for replay through http://www.actelion.com approximately 60 minutes after the call has ended.