<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from MedImmune, Inc.'s quarterly report on Form 10-Q for the nine months ended September 30, 2000 and is qualified in its entiredty by reference to such filing. </LEGEND> <CIK> 0000873591 <NAME> MEDIMMUNE, INC. <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> Dec-31-2000 <PERIOD-START> Jan-1-2000 <PERIOD-END> Sep-30-2000 <CASH> 68,644 <SECURITIES> 385,019 <RECEIVABLES> 34,647 <ALLOWANCES> 0 <INVENTORY> 47,892 <CURRENT-ASSETS> 526,411 <PP&E> 88,767 <DEPRECIATION> 0 <TOTAL-ASSETS> 859,690 <CURRENT-LIABILITIES> 62,421 <BONDS> 9,799 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 2,107 <OTHER-SE> 783,405 <TOTAL-LIABILITY-AND-EQUITY> 859,690 <SALES> 268,409 <TOTAL-REVENUES> 285,204 <CGS> 72,816 <TOTAL-COSTS> 225,383 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 376 <INCOME-PRETAX> 80,327 <INCOME-TAX> 25,303 <INCOME-CONTINUING> 55,024 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 55,024 <EPS-BASIC> 0.26 <EPS-DILUTED> 0.25