NETSCOUT SYSTEMS INC — Director's Dealing 2011

May 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NETSCOUT SYSTEMS INC (NTCT)
CIK: 0001078075
Period of Report: 2011-05-03

Reporting Person: HADZIMA JOSEPH G JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-03	Common Stock	M	10000	$5.41	Acquired	130074	Direct
2011-05-03	Common Stock	S	10000	$24.1516	Disposed	120074	Direct
2011-05-04	Common Stock	S	2500	$23.909	Disposed	117574	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-03	Stock Options (Right to Buy)	$5.41	M	10000	Disposed	2013-10-14	Common Stock (10000)	Direct

Footnotes

F1: Option was exercised and related Common stock was sold.

F2: 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 $24.02 to $24.23.

F3: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F4: 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 $23.77 to $24.14.