BOARD OF DIRECTORS

Robert A. Ingram
Chairman of the Board
Vice Chairman, Pharmaceuticals GlaxoSmithKline

Colin Goddard, Ph.D.
Chief Executive Officer

Edwin A. Gee, Ph.D.
Chairman, Emeritus
Former Chairman & CEO
International Paper, Inc.


Michael G. Atieh
Group President
Dendrite International


G. Morgan Browne
Former Chief Financial Officer and Administrative Director
Cold Spring Harbor Laboratory


John H. French II
Vice Chairman
Company of the Far Countries


Daryl K. Granner, M.D.
Director, Vanderbilt Diabetes Center; Professor, Molecular Physiology and Biophysics, Vanderbilt University

Walter M. Lovenberg, Ph.D.
Former Executive Vice President
Marion Merrell Dow Inc.


Viren Mehta
Mehta Partners LLC

Sir Mark Richmond
Formerly Head of Research and Special Assignments,
Glaxo Research & Development


John P. White, Esq.
Partner
Cooper & Dunham LLP




EXECUTIVE MANAGEMENT COMMITTEE
Colin Goddard, Ph.D.
Chief Executive Officer

Gabriel Leung
Executive Vice President and President, Oncology Business

Nicole Onetto, M.D.

Executive Vice President and Chief Medical Officer

Robert L. Van Nostrand

Vice President and
Chief Financial Officer


Barbara A. Wood, Esq.
Vice President and General Counsel

Robert L. Simon
Vice President, Global Regulatory Affairs and CMC

Neil Gibson, Ph.D.
Vice President, Research

Corporate Headquarters
OSI Pharmaceuticals, Inc.
58 South Service Road
Suite 110
Melville, NY 11747

Other Company Locations
OSI Pharmaceuticals (UK) Limited
Watlington Road
Oxford, OX4 6LT
United Kingdom

OSI Pharmaceuticals (Boulder)
2860 Wilderness Place
Boulder, CO 80301

OSI Pharmaceuticals (US Research)
1 Bioscience Park Drive
Farmingdale, NY 11735

Transfer Agent
& Registrar

Bank of New York
101 Barclay Street
New York, NY 10286
(800) 524-4458
http://stock.bankofny.com




Corporate Counsel
Saul Ewing LLP
Centre Square West
1500 Market Street
Philadelphia, PA 19102

General Counsel
Mintz, Levin
666 Third Avenue
New York, NY 10017

Patent Counsel
Cooper & Dunham LLP
1185 Avenue of The Americas
New York, NY 10036

Auditors
KPMG LLP
1305 Walt Whitman Road
Melville, NY 11747

Annual Meeting
The annual meeting of
shareholders will be held on March 17, 2004 at 10:00AM at:
OSI Pharmaceuticals, Inc.
Corporate Headquarters
58 South Service Road
Melville, New York 11747

Annual Report
on Form 10-K

The Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission and other information may be obtained without charge by writing, phoning or visiting our website:

OSI Pharmaceuticals, Inc.
58 South Service Road
Suite 110
Melville, NY 11747
(631) 962-2000
www.osip.com

Stock Listing
Nasdaq: OSIP

Copyright © 2004 OSI Pharmaceuticals, Inc.
All Rights Reserved.

Design:
Ross Culbert & Lavery, Inc.
www.rclnyc.com

Portrait Photography:
Mark Asnin, Peter Vidor,
Dwight Cendrowski