NETSCOUT SYSTEMS INC — Director's Dealing 2013

May 2, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NETSCOUT SYSTEMS INC (NTCT)
CIK: 0001078075
Period of Report: 2013-04-30

Reporting Person: EGAN JOHN R (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-04-30	Common Stock	M	10000	$5.41	Acquired	45478	Direct
2013-04-30	Common Stock	J	10000	—	Acquired	10000	Indirect
2013-04-30	Common Stock	J	10000	—	Disposed	35478	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-04-30	Stock Options (Right to Buy)	$5.41	M	10000	Disposed	2013-10-14	Common Stock (10000)	Direct

Footnotes

F1: Option was exercised.

F2: This transaction is being voluntarily reported on this Form 4 in lieu of a Form 5 after the close of the company's fiscal year end.

F3: The shares of common stock were transferred without receipt of consideration to a revocable trust for the benefit of the reporting person concurrently with the option exercise.

F4: Price is not applicable. The shares of common stock were transferred without receipt of consideration.

F5: Shares of common stock are beneficially owned by a revocable trust for the benefit of the reporting person.

F6: Date is N/A.