| Date | Event |
| 6-Nov-09 | OSI PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 21-Oct-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 15-Oct-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 7-Aug-09 | OSI PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 22-Jul-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 9-Jul-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Entry into a Material Definitive Agreement, Other Events |
| 22-Jun-09 | Price hit new 52-week low ($27.42) |
| 19-Jun-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 16-Jun-09 | Price hit new 52-week low ($27.66) |
| 15-Jun-09 | Price hit new 52-week low ($28.09) |
| 3-Jun-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 19-May-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 8-May-09 | OSI PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 29-Apr-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 24-Apr-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 16-Apr-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 24-Mar-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 4-Mar-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 27-Feb-09 | OSI PHARMACEUTICALS INC Files SEC form 10-K, Annual Report |
| 19-Feb-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 12-Feb-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 4-Feb-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 16-Jan-09 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 18-Dec-08 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Change in Directors or Principal Officers, Amendments to Articles of Inc. |
| 16-Dec-08 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Exhib |
| 4-Dec-08 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Regulation FD Disclosure |
| 21-Nov-08 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 12-Nov-08 | OSI PHARMACEUTICALS INC Files SEC form 8-K, Other Events |
| 10-Nov-08 | OSI PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |