ARTHUR J. GALLAGHER & CO. COMPUTATION OF NET EARNINGS PER COMMON AND COMMON EQUIVALENT SHARE (UNAUDITED) Three-month period ended Six-month period ended June 30, June 30, 1997 1996 1997 1996 -------- -------- -------- -------- (In thousands, except per share data) Net earnings $12,792 $ 7,001 $22,030 $15,535 Adjustments to net earnings for computation related to the 20% limitation on the buyback of common shares using the treasury stock method 288 169 614 312 ------- ------- ------- ------- Net earnings applicable to computation $13,080 $ 7,170 $22,644 $15,847 ======= ======= ======= ======= Average common shares outstanding 16,358 16,484 16,421 16,531 Dilutive effect of stock options using the treasury stock method 1,501 1,230 1,559 1,320 ------- ------- ------- ------- Weighted average number of common and common equivalent shares outstanding 17,859 17,714 17,980 17,851 ======= ======= ======= ======= Net earnings per common and common equivalent share $.73 $.40 $1.26 $.89