EXHIBIT 11 DURA PHARMACEUTICALS, INC. STATEMENTS RE COMPUTATIONS OF NET INCOME PER SHARE IN THOUSANDS, EXCEPT PER SHARE AMOUNTS (UNAUDITED) THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JUNE 30, 1999 1998 1999 1998 ------- ------- ------- ------- NET INCOME PER SHARE - BASIC Net Income $ 7,583 $ 8,177 $15,348 $15,341 ------- ------- ------- ------- ------- ------- ------- ------- Weighted average number of common shares: Common stock 44,085 46,302 44,092 46,139 ------- ------- ------- ------- ------- ------- ------- ------- Net Income per share $ 0.17 $ 0.18 $ 0.35 $ 0.33 ------- ------- ------- ------- ------- ------- ------- ------- NET INCOME PER SHARE - DILUTED Net Income $ 7,583 $ 8,177 $15,348 $15,341 ------- ------- ------- ------- ------- ------- ------- ------- Weighted average number of common and common equivalent shares assuming issuance of all dilutive contingent shares: Common stock 44,085 46,302 44,092 46,139 Stock options 562 621 778 718 Warrants 438 1,150 458 1,464 ------- ------- ------- ------- Total 45,085 48,073 45,328 48,321 ------- ------- ------- ------- ------- ------- ------- ------- Net Income per share $ 0.17 $ 0.17 $ 0.34 $ 0.32 ------- ------- ------- ------- ------- ------- ------- -------