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) (Unaudited) FISCAL QUARTERS ENDED TWO FISCAL QUARTERS ENDED --------------------- --------------------------- Nov 1, Nov 2, Nov 1, Nov 2, 1998 1997 1998 1997 -------- -------- -------- -------- BASIC EARNINGS PER SHARE Net earnings $ 53,314 $ 57,993 $ 88,834 $122,347 ======== ======== ======== ======== Common Shares outstanding at the beginning of the period 176,558 174,245 175,686 171,859 Weighted average number of Common Shares issued during the period 208 488 744 1,971 -------- -------- -------- -------- Weighted average number of Common Shares outstanding during the period 176,766 174,733 176,430 173,830 ======== ======== ======== ======== Basic earnings per share $ 0.30 $ 0.33 $ 0.50 $ 0.70 ======== ======== ======== ======== FULLY DILUTED EARNINGS PER SHARE Earnings before imputed earnings $ 53,314 $ 57,993 $ 88,834 $122,347 After tax imputed earnings from the investment of funds received through dilution -- 4,363 -- 8,342 -------- -------- -------- -------- Adjusted net earnings $ 53,314 $ 62,356 $ 88,834 $130,689 ======== ======== ======== ======== Weighted average number of Common Shares outstanding during the period 176,766 174,733 176,430 173,830 Weighted average common share equivalents based on conversion of outstanding stock options -- 15,783 -- 15,953 -------- -------- -------- -------- Weighted average number of Common Shares and equivalents outstanding during the period 176,766 190,516 176,430 189,783 ======== ======== ======== ======== Fully diluted earnings per share $ 0.30 $ 0.33 $ 0.50 $ 0.69 ======== ======== ======== ======== 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 $ 0.6520 $ 0.7204 $ 0.6667 $ 0.7223 Basic earnings per share, in U.S. dollars $ 0.20 $ 0.24 $ 0.34 $ 0.51 ======== ======== ======== ======== Fully diluted earnings per share, in U.S. dollars $ 0.20 $ 0.24 $ 0.34 $ 0.50 ======== ======== ======== ======== (Page 28 of 30)