EXHIBIT 11.1
NETSCOUT SYSTEMS, INC.
STATEMENT RE COMPUTATION OF PER SHARE EARNINGS
(UNAUDITED)
Below is a summary of the shares used in computing basic and diluted net income
per share for the periods indicated.
THREE MONTHS ENDED NINE MONTHS ENDED
DECEMBER 31, DECEMBER 31,
1999 1998 1999 1998
---- ---- ---- ----
Weighted average number of shares
outstanding ............................... 25,796,397 19,668,172 20,249,284 19,568,493
Shares attributable to Class B Convertible
Common Stock .............................. -- -- 3,374,454 --
Shares attributable to Series A Preferred
Stock ..................................... -- 2,526,316 610,910 2,526,316
Shares attributable to unvested Non-Voting
Common Stock .............................. -- 126,250 -- 155,075
Stock options ............................. 2,357,949 1,659,726 2,327,330 1,542,181
---------- ---------- ---------- ----------
Shares used in computing diluted net income
per share ................................. 28,154,346 23,980,464 26,561,978 23,792,065
========== ========== ========== ==========
Below is a summary of the shares used in computing pro forma basic and diluted
net income per share for the periods indicated.
THREE MONTHS ENDED NINE MONTHS ENDED
DECEMBER 31, DECEMBER 31,
1999 1998 1999 1998
---- ---- ---- ----
Weighted average number of shares
outstanding ................................ 25,796,397 19,668,172 20,249,284 19,568,493
Shares attributable to Class B Convertible
Common Stock ............................... -- -- 3,374,454 --
Shares attributable to Series A Preferred
Stock ...................................... -- 2,526,316 610,910 2,526,316
---------- ---------- ---------- ----------
Shares used in computing pro forma basic net
income per share ........................... 25,796,397 22,194,488 24,234,648 22,094,809
Shares attributable to unvested Non-Voting
Common Stock ............................... -- 126,250 -- 155,075
Stock options .............................. 2,357,949 1,659,726 2,327,330 1,542,181
---------- ---------- ---------- ----------
Shares used in computing pro forma diluted
net income per share ....................... 28,154,346 23,980,464 26,561,978 23,792,065
========== ========== ========== ==========
For both diluted net income per share and pro forma diluted net income per
share, stock options to purchase 57,652 for the three months ended December 31,
1998 (unaudited) and 20,072 and 94,429 shares of Non-Voting Common Stock for the
nine months ended December 31, 1999 and 1998 (unaudited), respectively, were
outstanding at period end but were not included in the computation of diluted or
pro forma diluted net income per share because the exercise prices of the
options were greater than the average fair value of the common stock for the
respective period.