EXHIBIT 11 AMPHENOL CORPORATION Computation of Per Share Earnings For the Three Years Ended December 31, 1998 (dollars in thousands, except per share amounts) Year Ended December 31, ----------------------------------------- 1998 1997 1996 ---------- ---------- ---------- Income before extraordinary item ...................... $36,510 $51,264 $67,578 Extraordinary item: Loss on early extinguishment of debt, net of income taxes ................................. -- (24,547) -- ------- ------- ------- Net income applicable to Common Stock ................. $36,510 $26,717 $67,578 ======= ======= ======= Net income per common share: Income before extraordinary item .................... $2.07 $1.84 $1.45 Extraordinary loss .................................. -- (.88) -- ----- ---- ----- Net income .......................................... $2.07 $.96 $1.45 ===== ==== ===== Average common shares outstanding ..................... 17,663,212 27,806,260 46,649,541 ========== ========== ========== Net income per common share - assuming dilution: Income before extraordinary item .................... $2.03 $1.83 $1.45 Extraordinary loss .................................. -- (.88) -- ----- ----- ----- Net income .......................................... $2.03 $ .95 $1.45 ===== ===== ===== Average common shares outstanding ..................... 17,663,212 27,806,260 46,649,541 Employee stock options ................................ 279,185 196,717 71,359 ---------- ---------- ---------- Average common shares outstanding-assuming dilution ... 17,942,397 28,002,977 46,720,900 ========== ========== ==========