NETSCOUT SYSTEMS INC — Director's Dealing 2011

May 18, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NETSCOUT SYSTEMS INC (NTCT)
CIK: 0001078075
Period of Report: 2011-05-16

Reporting Person: SZABADOS MICHAEL (Chief Operating Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-16	Common Stock	S	1875	$23.03	Disposed	43166	Direct

Footnotes

F1: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

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 $22.90 to $23.10.