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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1078075	Netscout Systems Inc	NTCT	Services-Computer Integrated Systems Design (7373)	042837575

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1233501	J Vincent Mullarkey	C/O Netscout Systems, Inc. 310 Littleton Road Westford MA 01886		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-10-27	30,000	$15.13	72,792	No	4	M	Direct
Common Stock	Disposition	2010-10-27	30,000	$22.93	42,792	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Options (Right to Buy)	Disposition	2010-10-27	30,000	$0.00	30,000	$15.13

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2011-01-17	No	4	M	Direct

Footnotes

Option was exercised and related Common stock was sold pursuant to a 10b5-1 plan.
The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $22.53 to $23.26.
Option vested over three years in equal annual installments. The initial portion of the option grant initially became exercisable on January 17, 2002 and the remainder vested in equal annual installments thereafter.