MELVILLE, N.Y.--(BUSINESS WIRE)--Jan. 25, 2006--OSI Pharmaceuticals, Inc. (NASDAQ:OSIP) today informed investors that it will announce fourth quarter and year-end financial results on March 7, 2006 at 5:00PM Eastern Standard Time. At 7:30AM on March 8, 2006, OSI will webcast a conference call live on the Company’s website to review the Company’s financial results and business developments. OSI also announced that on March 10, 2006, the Company will host an analyst meeting in New York, New York to review its research and development programs and product portfolio. Further details to access these events will follow in future announcements.