Actelion to discuss Half Year financial results 2009

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announcement.
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Actelion senior management to host Q & A session

Dear Member of the Investment Community

Actelion Ltd will announce the Half Year financial results 2009 on
Tuesday, 21 July 2009, at 07.00 hrs CEST / 06.00 hrs BST / 01.00 a.m.
EDT. An investor conference call & webcast will be held at 15.30 hrs,
CEST to discuss the results.
In addition, the company will provide a comprehensive update on its
clinical development pipeline.

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

Date/Time:

21 July 2009 15.30 hrs - 16.30 hrs Basel (CEST)
14.30 hrs - 15.30 hrs U.K. (BST)
09.30 a.m. - 10.30 a.m. U.S. (EDT)

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

Dial: Europe: +41 44 580 64 03
U.K.: +44 203 147 47 52
U.S.: +1 866 931 15 72

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
http://www.actelion.com 10-15 minutes before the conference is due to
start. If you experience any access problems go directly to the URL:
http://gaia.world-television.com/actelion/20090721/trunc

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.

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Actelion Pharmaceuticals Ltd
Gewerbestrasse 16 Allschwil
Switzerland

WKN: 936767; ISIN: CH0010532478; Index: SBIOM, SLIFE, SMCI, SMIEXP,
SMIM, SPI, SPIEX;
Listed: Main Market in SIX Swiss Exchange;
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