NEWS RELEASE: AMGEN ANNOUNCES WEBCAST OF R&D DAY WITH THE INVESTMENT COMMUNITY THOUSAND OAKS, Calif. (February 23, 2004) - Amgen Inc. (NASDAQ: AMGN), the world’s largest biotechnology company, today announced that it would broadcast over the Internet its first ever R&D Day meeting with the investment community on Tuesday, March 23, 2004 at 8:30 a.m. EST, from New York City. At this meeting, Amgen will provide comprehensive detail regarding its research and development programs. This broadcast will be available to media, investors and the general public. The meeting is expected to last approximately four hours. This event can be accessed by going to Amgen's Web site, http://www.amgen.com and clicking on Investors, then on Amgen Events. Audio and slide presentations will be available through the Web site. The event will be archived and available for replay for one week after the event. Amgen is a global biotechnology company that discovers, develops, manufactures and markets important human therapeutics based on advances in cellular and molecular biology. CONTACT: Amgen, Thousand Oaks Sabrina Johnson: (805) 447-4587 (media) Cary Rosansky: (805) 447-1060 (investors) # # # EDITOR'S NOTE: An electronic version of this news release may be accessed via our Web site at http://www.amgen.com Journalists and media representatives may sign up to receive all news releases electronically at time of announcement by filling out a short form in the Media section of the Web site. SOURCE: Amgen Events http://www.amgen.com/news/news04/pressRelease040223.pdf * * * ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn