| Date | Event |
| 5-Nov-09 | ALEXION PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 22-Oct-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements a |
| 24-Sep-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Amendment or Waiver to Code of Ethics, Financial Statements and Exhib |
| 21-Sep-09 | Price hit new 52-week high ($46.80) |
| 18-Sep-09 | Price hit new 52-week high ($46.79) |
| 17-Sep-09 | Price hit new 52-week high ($46.64) |
| 24-Jul-09 | ALEXION PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 23-Jul-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements a |
| 1-Jul-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Fina |
| 2-Jun-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 29-May-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Unregistered Sale of Equity Securities |
| 8-May-09 | ALEXION PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |
| 23-Apr-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition, Change in Directors or |
| 17-Apr-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Unregistered Sale of Equity Securities |
| 9-Apr-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Unregistered Sale of Equity Securities |
| 23-Feb-09 | ALEXION PHARMACEUTICALS INC Files SEC form 10-K, Annual Report |
| 12-Feb-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements a |
| 5-Jan-09 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 12-Nov-08 | ALEXION PHARMACEUTICALS INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and E |
| 30-Oct-08 | ALEXION PHARMACEUTICALS INC Files SEC form 10-Q, Quarterly Report |