Exhibit 11.1 NEWBRIDGE NETWORKS CORPORATION COMPUTATION OF EARNINGS PER SHARE (Accounting principles generally accepted in Canada) (Canadian dollars, amounts in thousands except per share data) for the fiscal quarter ended for the fiscal year ended ---------------------------- ------------------------- Jul 28, Oct 27, Jan 26, Apr 30, Apr 30, Apr 30, Apr 30, 1996 1996 1997 1997 1997 1996 1995 ---- ---- ---- ---- ---- ---- ---- Basic earnings per share Net earnings $60,801 $62,781 $63,031 $(29,696) $156,917 $202,864 $188,390 ====== ====== ====== ====== ======= ======= ======= Common Shares outstanding at the beginning of the period 168,676 169,754 170,741 171,279 168,676 164,515 161,565 Weighted average number of Common Shares issued during the period 552 478 200 422 1,834 1,327 1,326 ------- ------- ------- ------- ------- ------- ------- Weighted average number of Common Shares outstanding at the end of the period 169,228 170,232 170,941 171,701 170,510 165,842 162,891 ======= ======= ======= ======= ======= ======= ======= Basic earnings per share 36(c) 37(c) 37(c) (17)(c) 92(c) $1.22 $1.16 == == == == == ==== ==== Fully diluted earnings per share Earnings before imputed earnings $60,801 $62,781 $63,031 $(29,696) $156,917 $202,864 $188,390 After tax imputed earnings from the investment of funds received through dilution 2,883 2,715 2,693 3,298 11,589 10,470 6,812 ------ ------ ------ ------- ------- ------- ------- Adjusted net earnings $63,684 $65,496 $65,724 $(26,398) $168,506 $213,334 $195,202 ====== ====== ====== ======= ======= ======= ======= Weighted average number of Common Shares outstanding at the end of the period 169,228 170,232 170,941 171,701 170,510 165,842 162,891 equivalents based on conversion of outstanding stock options 18,482 13,899 14,096 15,755 14,085 13,823 12,932 ------- ------- ------- ------- ------- ------- ------- Weighted average number of Common Shares and equivalents outstanding at the end of the period 181,710 184,131 185,037 187,456 184,595 179,665 175,823 ======= ======= ======= ======= ======= ======= ======= Fully diluted earnings per share 35(c) 36(c) 36(c) (17)(c) 91(c) $1.19 $1.11 == == == == == ==== ==== Earnings per share expressed in U.S. dollars Daily average exchange rate of a Canadian dollar for U.S. dollars as reported by the Federal Reserve Bank of New York $0.7309 $0.7322 $0.7406 $0.7284 $0.7344 $0.7345 $0.7248 Basic earnings (loss) per share, in U.S. dollars 26(c) 27(c) 27(c) (13)(c) 68(c) 90(c) 84(c) Fully diluted earnings (loss) per share, in U.S. dollars 26(c) 26(c) 26(c) (13)(c) 67(c) 87(c) 80(c) Page 182