EXHIBIT 11 AMPHENOL CORPORATION Computation of Per Share Earnings For the Three Years Ended December 31, 1999 (dollars in thousands, except per share amounts) Year Ended December 31, ------------------------------------------ 1999 1998 1997 ------------ ------------ ------------ Income before extraordinary item .................. $ 44,295 $ 36,510 $ 51,264 Extraordinary item: Loss on early extinguishment of debt, net of income taxes ........................... (8,674) -- (24,547) ------------ ------------ ------------ Net income applicable to Common Stock ............. $ 35,621 $ 36,510 $ 26,717 ============ ============ ============ Net income per common share: Income before extraordinary item .............. $ 2.46 $ 2.07 $ 1.84 Extraordinary loss ............................ (.48) (.88) ------------ ------------ ------------ Net income .................................... $ 1.98 $ 2.07 $ .96 ============ ============ ============ Average common shares outstanding ................. 18,029,778 17,663,212 27,806,260 ============ ============ ============ Net income per common share - assuming dilution: Income before extraordinary item .............. $ 2.42 $ 2.03 $ 1.83 Extraordinary loss ............................ (.48) -- (.88) ------------ ------------ ------------ Net income .................................... $ 1.94 $ 2.03 $ .95 ============ ============ ============ Average common shares outstanding ................. 18,029,778 17,663,212 27,806,260 Employee stock options ............................ 302,230 279,185 196,717 ------------ ------------ ------------ Average common shares outstanding-assuming dilution 18,332,008 17,942,397 28,002,977 ============ ============ ============