<TABLE>
<CAPTION>
SIMPSON MANUFACTURING CO., INC. AND SUBSIDIARIES
COMPUTATION OF EARNINGS PER COMMON SHARE
(UNAUDITED)
EXHIBIT 11
----------
Basic Earnings per Share
Three Months Ended Six Months Ended
June 30, June 30,
---------------------------- ----------------------------
2000 1999 2000 1999
------------ ------------ ------------ ------------
<S> <C> <C> <C> <C>
Weighted average number of common
shares outstanding 12,042,289 11,779,256 12,031,367 11,680,581
============ ============ ============ ============
Net income $ 11,324,182 $ 10,072,757 $ 20,599,946 $ 17,721,159
============ ============ ============ ============
Basic net income per share $ 0.94 $ 0.86 $ 1.71 $ 1.52
============ ============ ============ ============
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
SIMPSON MANUFACTURING CO., INC. AND SUBSIDIARIES
COMPUTATION OF EARNINGS PER COMMON SHARE
(UNAUDITED)
EXHIBIT 11
----------
DILUTED EARNINGS PER SHARE
Three Months Ended Six Months Ended
June 30, June 30,
---------------------------- ----------------------------
2000 1999 2000 1999
------------ ------------ ------------ ------------
<S> <C> <C> <C> <C>
Weighted average number of common
shares outstanding 12,042,289 11,779,256 12,031,367 11,680,581
Shares issuable pursuant to employee
stock option plans, less shares
assumed repurchased at the average
fair value during the period 272,265 441,999 264,807 481,144
Shares issuable pursuant to the
independent director stock option
plan, less shares assumed repurchased
at the average fair value during the
period 4,296 3,974 4,005 3,731
------------ ------------ ------------ ------------
Number of shares for computation of
diluted net income per share 12,318,850 12,225,229 12,300,179 12,165,456
============ ============ ============ ============
Net income $ 11,324,182 $ 10,072,757 $ 20,559,946 $ 17,721,159
============ ============ ============ ============
Diluted net income per share $ 0.92 $ 0.82 $ 1.67 $ 1.46
============ ============ ============ ============
</TABLE>