INTERNATIONAL MUREX TECHNOLOGIES CORPORATION COMPUTATIONS OF EARNINGS PER SHARE (1) THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, ---------------------- -------------------- 1997 1996 1997 1996 ---------- -------- --------- -------- PRIMARY Weighted average shares outstanding during the period 16,510 16,168 16,460 16,164 Shares issuable upon assumed exercise of stock options and warrants, less amounts assumed repurchased under treasury stock method(2) 1,269 279 1,221 93 ---------- -------- --------- -------- Total common shares and common shares equivalents 17,779 16,447 17,681 16,257 ========== ======== ========= ======== Net income (loss) $2,565 $1,292 $6,313 $9 ========== ======== ========= ======== Primary per share amount $0.14 $0.08 $0.36 $0.00 ========== ======== ========= ======== FULLY DILUTED(3) Total common shares and common share equivalents 17,779 16,447 17,681 16,257 Additional shares issuable upon assumed exercise of stock options and warrants, less amounts assumed repurchased under treasury stock method(2) 53 395 93 132 ---------- -------- --------- -------- Total 17,832 16,842 17,774 16,389 ========== ======== ========= ======== Net income (loss) $2,565 $1,292 $6,313 $9 ========== ======== ========= ======== Fully diluted per share amount $0.14 $0.08 $0.36 $0.00 ========== ======== ========= ======== (1) Weighted average share and dollar amounts, except per share amounts, are stated in thousands (2) Shares issued from assumed exercise of options and warrants include the number of incremental shares which result from applying the "treasury stock method" for options and warrants, APB Opinion No. 15, paragraph 36. The options and warrants are antidilutive in 1995 and are not included in the calculation. (3) This calculation is submitted in accordance with 17 CFR 229.601(b)(11) although not required by APB Opinion No. 15 because it results in dilution of less than 3%. -21-