CLOSURE MEDICAL CORPORATION COMPUTATION OF PRO FORMA NET INCOME (LOSS) PER SHARE (Unaudited) (In thousands, except per share data) Three Months Ended Six Months Ended June 30, June 30, June 30, June 30, 1998 1997 1998 1997 -------- -------- -------- ------- Weighted average common shares outstanding for the period 13,264 13,186 13,258 12,701 -------- ------- ------- ------ Shares used in computing net income (loss) per share 13,264 13,186 13,258 12,701 ======== ======= ======= ======= Net income (loss) $ (2,320) $(1,699) $(4,276) (3,195) ======== ======= ======= ======= Net income (loss) per share $ (0.17) $ (0.13) $ (0.32) $(0.25) ======== ======= ======= =======