Investor Update

Basel, 19 July 2005

Reminder: 20 July - Roche's 2005 Half Year Results and Report

Presentation in London – 14.00 GMT (15.00 CET)

07.00 CET (Central European time):
Roche will publish its HALF YEAR RESULTS for 2005 prior to the opening of the Swiss Stock Exchange.  Concurrently, the HALF YEAR PRESENTATION SLIDES and the HALF YEAR REPORT will be available from the Roche website ir.roche.com.

14.00 - 17.00 GMT (15.00 – 18.00 CET):
We would like to invite all interested parties to dial in or attend in person the HALF YEAR PRESENTATION followed by Q&A and additional break-out sessions held at Cabot Hall, Cabot Place West, Canary Warf, London E14 5AB. Participants will be:

Dr. Franz B. Humer, Chairman of the Board of Directors and Chief Executive Officer
Dr. Erich Hunziker, CFO and Deputy Head of the Corporate Executive Committee
William M. Burns, CEO Division Roche Pharma
Heino von Prondzynski, CEO Division Roche Diagnostics

This presentation can be followed by a live audio webcast with synchronized presentation slides accessed via ir.roche.com. It is also possible to email questions into the event from this website.

Alternatively, you can dial in to the conference using the following dial-in numbers (listen only mode, no live access to speakers):

+41 (0) 91 610 56 00 (Europe and ROW) or
+44 (0) 207 107 06 11 (UK)  or
+1 (1) 866 291 41 66  (USA)

At 16.00 GMT (17.00 CET) the break-out sessions covering the topics Strategy & Finance, Pharmaceuticals, Diagnostics and Accounting will be held following the main Q&A session.
The break-out sessions will be recorded and placed on the Roche website shortly after the event.

REPLAY:
A replay will be available one hour after the respective event, for 48 hours. Access is by dialing:
+41 91 612 43 30  (Europe) or +44 207 108 62 33 (UK) or +1  (1) 866 416 25 58 (USA) and enter the conference ID 692 followed by the # sign.

The webcast will be available on demand at http://ir.roche.com.