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EXHIBIT 11
SECURITY DYNAMICS TECHNOLOGIES, INC.
AND SUBSIDIARIES
COMPUTATION OF INCOME PER COMMON AND COMMON EQUIVALENT SHARE
THREE MONTHS ENDED MARCH 31, 1997 AND 1996
(IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
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1997 1996
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PRIMARY
Weighted average number of common and
common equivalent shares outstanding:
Common stock 34,865 33,710
Common equivalent shares resulting from
stock options (treasury stock method) 1,693 2,564
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Total 36,558 36,274
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Net income $ 4,729 $ 2,168
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Net income per common and common equivalent share $ .13 $ .06
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FULLY DILUTED
Weighted average number of common and
common equivalent shares outstanding:
Common stock 34,865 33,710
Common equivalent shares resulting from
stock options (treasury stock method) 1,693 2,564
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Total 36,558 36,274
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Net income $ 4,729 $ 2,168
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Net income per common and common equivalent share $ .13 $ .06
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