SIMPSON MANUFACTURING CO., INC. AND SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON SHARE (UNAUDITED) EXHIBIT 11 -------------- Primary Earnings per Share Three Months Ended Six Months Ended June 30, June 30, 1997 1996 1997 1996 ------------ ------------ ------------ ------------ Weighted average number of common shares outstanding 11,457,312 11,428,130 11,458,580 11,409,066 Shares issuable pursuant to employee stock option plans, less shares assumed repurchased at the average fair value during the period 439,146 315,867 429,102 279,563 Shares issuable pursuant to the independent director stock option plan, less shares assumed repurchased at the average fair value during the period 4,870 3,509 4,805 3,044 ------------ ------------ ------------ ------------ Number of shares for computation of primary net income per share 11,901,328 11,747,506 11,892,487 11,691,673 ============ ============ ============ ============ Net income $ 7,020,993 $ 5,167,849 $ 11,778,267 $ 8,430,353 ============ ============ ============ ============ Primary net income per share $ 0.59 $ 0.44 $ 0.99 $ 0.72 ============ ============ ============ ============ SIMPSON MANUFACTURING CO., INC. AND SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON SHARE (UNAUDITED) EXHIBIT 11 -------------- Fully Diluted Earnings per Share Three Months Ended Six Months Ended June 30, June 30, 1997 1996 1997 1996 ------------ ------------ ------------ ------------ Weighted average number of common shares outstanding 11,457,312 11,428,130 11,458,580 11,409,066 Shares issuable pursuant to employee stock option plans, less shares assumed repurchased at the end of period fair value 452,968 362,332 451,125 370,836 Shares issuable pursuant to the independent director stock option plan, less shares assumed repurchased at the end of period fair value 4,981 4,000 4,981 4,000 ------------ ------------ ------------ ------------ Number of shares for computation of fully diluted net income per share 11,915,261 11,794,462 11,914,686 11,783,902 ============ ============ ============ ============ Net income $ 7,020,993 $ 5,167,849 $ 11,778,267 $ 8,430,353 ============ ============ ============ ============ Fully diluted net income per share $ 0.59 $ 0.44 $ 0.99 $ 0.72 ============ ============ ============ ============