CLOSURE MEDICAL CORPORATION COMPUTATION OF PRO FORMA NET INCOME (LOSS) PER SHARE (Unaudited) (In thousands, except per share data) Three Months Ended March 31, March 31, 1997 1996 --------- -------- Weighted average common shares 12,210 9,600 outstanding for the period Common equivalent shares pursuant to Staff Accounting Bulletin #83(1) -- 550 --------- -------- Shares used in computing net income (loss) per share 12,210 10,150 ========= ======== Net income (loss) $ (1,496) $ 1,828 ========= ======== Net income (loss) per share $ (0.12) $ 0.18 ========= ======== (1) Issuance of common stock options at prices below the expected public offering price within 12 months of the effective date of the initial public offering of Closure Medical Corporation have been included as if they had been issued as common stock for all periods prior to June 30, 1996.