TEKELEC STATEMENT OF COMPUTATION OF EARNINGS PER SHARE Three Months Ended PRIMARY March 31, (thousands, except per share data) -------------------------- 1997 1996 ------------ ------------ Net income (loss) ............................................................................... $ 1,628 $ (3,968) ============ ============ Basis for computation of primary earnings per common and common equivalent share: Weighted average number of shares outstanding during period ..................................... 12,207 11,637 Weighted average (incremental) common share equivalent after considering the effects of options exercised and canceled during the period and after assumed repurchase of treasury shares-- treasury stock method ........................................................................... 1,122 -- ------------ ------------ 13,329 11,637 ------------ ------------ Earnings (Loss) per share ....................................................................... $ 0.12 $ (0.34) ============ ============ Three Months Ended FULLY DILUTED March 31, (thousands, except per share data) 1997 1996 ------------ ------------ Net income (loss) ............................................................................... $ 1,628 $ (3,968) ============ ============ Basis for computation of fully diluted earnings per common and common equivalent share: Weighted average number of shares outstanding during period ..................................... 12,207 11,637 Weighted average (incremental) common share equivalent after considering the effects of options exercised and canceled during the period and after assumed repurchase of treasury shares -- treasury stock method ........................................................................... 1,136 -- ------------ ------------ 13,343 11,637 ============ ============ Earnings (Loss) per share ....................................................................... $ 0.12 $ (0.34) ============ ============ TEKELEC EXHIBIT 11.1