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EXHIBIT 11
SECURITY DYNAMICS TECHNOLOGIES, INC
AND SUBSIDIARIES
COMPUTATION OF INCOME PER COMMON AND COMMON EQUIVALENT SHARE
THREE AND SIX MONTHS ENDED JUNE 30, 1997 AND 1996
(IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
THREE MONTHS ENDED SIX MONTHS
JUNE 30, ENDED JUNE 30,
1997 1996 1997 1996
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PRIMARY
Weighted average number of common and
common equivalent shares outstanding:
Common stock 35,038 33,986 34,952 33,848
Common equivalent shares resulting from
stock options (treasury stock method) 1,591 2,618 1,629 2,550
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Total 36,629 36,604 36,581 36,398
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Net income $ 5,502 $ 2,884 $10,231 $ 5,052
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Net income per common and common equivalent share $ .15 $ .08 $ .28 $ .14
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FULLY DILUTED
Weighted average number of common and
common equivalent shares outstanding:
Common stock 35,038 33,986 34,952 33,848
Common equivalent shares resulting from
stock options (treasury stock method) 1,789 2,661 1,835 2,658
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Total 36,827 36,647 36,787 36,506
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Net income $ 5,502 $ 2,884 $10,231 $ 5,052
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Net income per common and common equivalent share $ .15 $ .08 $ .28 $ .14
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