10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended December 31, 2014

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to                     

Commission file number 0000-26251

NETSCOUT SYSTEMS, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	04-2837575
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification No.)

310 Littleton Road, Westford, MA 01886

(978) 614-4000

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files.)    YES  x    NO  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES  ¨    NO  x

The number of shares outstanding of the registrant’s common stock, par value $0.001 per share, as of January 22, 2015 was 41,217,480.

NETSCOUT SYSTEMS, INC.

FORM 10-Q

FOR THE QUARTER ENDED DECEMBER 31, 2014

TABLE OF CONTENTS

PART I: FINANCIAL INFORMATION
Item 1.	Unaudited Financial Statements:
	Consolidated Balance Sheets: At December 31, 2014 and March 31, 2014	1
	Consolidated Statements of Operations: For the three and nine months ended December 31, 2014 and 2013	2
	Consolidated Statements of Comprehensive Income: For the three and nine months ended December 31, 2014 and 2013	3
	Consolidated Statements of Cash Flows: For the nine months ended December 31, 2014 and 2013	4
	Notes to Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	31
Item 4.	Controls and Procedures	31
PART II: OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	32
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	34
Item 6.	Exhibits	35
SIGNATURES		36
EXHIBIT INDEX		37

PART I: FINANCIAL INFORMATION

Item 1. Unaudited Financial Statements

NetScout Systems, Inc.

Consolidated Balance Sheets

(In thousands, except share and per share data)

	December 31, 2014			March 31, 2014
Assets	(Unaudited)
Current assets:
Cash and cash equivalents	$	106,704		$	102,076
Marketable securities	87,967			75,234
Accounts receivable, net of allowance for doubtful accounts of $177 and $313 at December 31, 2014 and March 31, 2014, respectively	83,415			60,518
Inventories	10,274			12,580
Prepaid income taxes	2,864			1,012
Deferred income taxes	14,174			15,846
Prepaid expenses and other current assets	9,846			11,496
Total current assets	315,244			278,762
Fixed assets, net	23,016			23,098
Goodwill	200,271			203,446
Intangible assets, net	52,469			58,513
Long-term marketable securities	46,055			41,484
Other assets	1,873			2,460
Total assets	$	638,928		$	607,763
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	10,927		$	11,541
Accrued compensation	39,369			34,901
Accrued other	11,026			6,430
Income taxes payable	—			791
Deferred revenue	107,595			109,301
Total current liabilities	168,917			162,964
Other long-term liabilities	2,147			2,370
Deferred tax liability	2,679			2,757
Accrued long-term retirement benefits	1,586			1,581
Long-term deferred revenue	27,036			24,639
Contingent liabilities, net of current portion	4,445			4,291
Total liabilities	206,810			198,602
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at December 31, 2014 and March 31, 2014	—			—
Common stock, $0.001 par value:
150,000,000 shares authorized; 50,717,718 and 49,922,959 shares issued and 41,217,480 and 41,165,784 shares outstanding at December 31, 2014 and March 31, 2014, respectively	51			50
Additional paid-in capital	292,059			273,574
Accumulated other comprehensive income (loss)	(1,552		)	2,772
Treasury stock at cost, 9,500,238 and 8,757,175 shares at December 31, 2014 and March 31, 2014, respectively	(149,345		)	(117,802		)
Retained earnings	290,905			250,567
Total stockholders’ equity	432,118			409,161
Total liabilities and stockholders’ equity	$	638,928		$	607,763

The accompanying notes are an integral part of these consolidated financial statements.

1

NetScout Systems, Inc.

Consolidated Statements of Operations

(In thousands, except per share data)

(Unaudited)

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
Revenue:
Product	$	76,446		$	68,561		$	198,765		$	163,895
Service	46,387			41,867			135,519			120,435
Total revenue	122,833			110,428			334,284			284,330
Cost of revenue:
Product	18,310			14,534			45,015			36,117
Service	8,672			9,068			26,158			24,111
Total cost of revenue	26,982			23,602			71,173			60,228
Gross profit	95,851			86,826			263,111			224,102
Operating expenses:
Research and development	18,864			18,348			56,872			50,951
Sales and marketing	34,836			32,425			104,304			96,184
General and administrative	13,391			7,929			33,211			22,367
Amortization of acquired intangible assets	821			860			2,539			2,571
Total operating expenses	67,912			59,562			196,926			172,073
Income from operations	27,939			27,264			66,185			52,029
Interest and other income (expense), net:
Interest income	95			66			298			210
Interest expense	(191		)	(198		)	(580		)	(575		)
Other (expense) income, net	(416		)	176			(904		)	277
Total interest and other income (expense), net	(512		)	44			(1,186		)	(88		)
Income before income tax expense	27,427			27,308			64,999			51,941
Income tax expense	9,798			10,014			24,661			19,511
Net income	$	17,629		$	17,294		$	40,338		$	32,430
Basic net income per share	$	0.43		$	0.42		$	0.98		$	0.78
Diluted net income per share	$	0.42		$	0.41		$	0.97		$	0.77
Weighted average common shares outstanding used in computing:
Net income per share - basic	41,206			41,425			41,128			41,417
Net income per share - diluted	41,536			41,884			41,679			41,969

The accompanying notes are an integral part of these consolidated financial statements.

2

NetScout Systems, Inc.

Consolidated Statements of Comprehensive Income

(In thousands)

(Unaudited)

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
Net income	$	17,629		$	17,294		$	40,338		$	32,430
Other comprehensive income:
Cumulative translation adjustments	(1,290		)	405			(3,397		)	1,624
Changes in market value of investments:
Changes in unrealized (losses) gains	(75		)	3			(54		)	7
Total net change in market value of investments	(75		)	3			(54		)	7
Changes in market value of derivatives:
Changes in market value of derivatives, net of (benefits) taxes of ($327), $31, ($595) and $35	(597		)	56			(1,068		)	55
Reclassification adjustment for net gains (losses) included in net income, net of taxes (benefits) of $133, ($15), $115 and $85	214			(25		)	195			164
Total net change in market value of derivatives	(383		)	31			(873		)	219
Other comprehensive (loss) income	(1,748		)	439			(4,324		)	1,850
Total comprehensive income	$	15,881		$	17,733		$	36,014		$	34,280

The accompanying notes are an integral part of these consolidated financial statements.

3

NetScout Systems, Inc.

Consolidated Statements of Cash Flows

(In thousands)

(Unaudited)

	Nine Months Ended
	December 31,
	2014			2013
Cash flows from operating activities:
Net income	40,338			32,430
Adjustments to reconcile net income to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	14,449			13,774
Loss on disposal of fixed assets	536			38
Deal related compensation expense and accretion charges	114			114
Share-based compensation expense associated with equity awards	11,947			9,959
Net change in fair value of contingent and contractual liabilities	(9		)	(289		)
Deferred income taxes	2,151			4,259
Other losses (gains)	84			(69		)
Changes in assets and liabilities
Accounts receivable	(22,973		)	(302		)
Inventories	1,359			(5,346		)
Prepaid expenses and other assets	(143		)	1,345
Accounts payable	(700		)	(1,255		)
Accrued compensation and other expenses	10,132			2,259
Income taxes payable	(791		)	591
Deferred revenue	828			3,259
Net cash provided by operating activities	57,322			60,767
Cash flows from investing activities:
Purchase of marketable securities	(78,547		)	(88,802		)
Proceeds from maturity of marketable securities	61,189			49,405
Purchase of fixed assets	(8,630		)	(8,709		)
Purchase of intangible assets	(131		)	(713		)
Decrease in deposits	103			37
Net cash used in investing activities	(26,016		)	(48,782		)
Cash flows from financing activities:
Issuance of common stock under stock plans	105			755
Payment of contingent consideration	—			(841		)
Treasury stock repurchases	(31,543		)	(25,033		)
Excess tax benefit from share-based compensation awards	4,322			2,039
Net cash used in financing activities	(27,116		)	(23,080		)
Effect of exchange rate changes on cash and cash equivalents	438			(187		)
Net increase (decrease) in cash and cash equivalents	4,628			(11,282		)
Cash and cash equivalents, beginning of period	102,076			99,930
Cash and cash equivalents, end of period	$	106,704		$	88,648
Supplemental disclosures:
Cash paid for income taxes	$	20,830		$	12,628
Non-cash transactions:
Transfers of inventory to fixed assets	$	940		$	1,781
Additions to property, plant and equipment included in accounts payable	$	380		$	233
Gross decrease in contractual liability relating to fair value adjustment	$	(49	)	$	(148	)
Gross increase (decrease) in contingent consideration liability relating to fair value adjustment	$	40		$	(141	)
Issuance of common stock under employee stock plans	$	2,760		$	2,230

The accompanying notes are an integral part of these consolidated financial statements.

4

NetScout Systems, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 1 – BASIS OF PRESENTATION

The accompanying unaudited interim consolidated financial statements have been prepared by NetScout Systems, Inc., or NetScout or the Company. Certain information and footnote disclosures normally included in financial statements prepared under generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, the unaudited interim consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the Company’s financial position, results of operations and cash flows. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. The results reported in these consolidated financial statements are not necessarily indicative of results that may be expected for the entire year. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2014.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers: Topic 606 (ASU 2014-09), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company in its first quarter of fiscal year 2018 using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU 2014-09; or (ii) retrospective with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU 2014-09. The Company is currently evaluating the impact of its pending adoption of ASU 2014-09 on its consolidated financial statements.

NOTE 2 – CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

Financial instruments that potentially subject us to concentration of credit risk consist primarily of investments, trade accounts receivable and accounts payable. Our cash, cash equivalents, and marketable securities are placed with financial institutions with high credit standings.

At December 31, 2014, the Company had no indirect channel partner or direct customer which accounted for more than 10% of the accounts receivable balance. At March 31, 2014, one direct customer accounted for more than 10% of the accounts receivable balance, while no indirect channel partner accounted for more than 10% of the accounts receivable balance.

During the three and nine months ended December 31, 2014, no direct customer or indirect channel partner accounted for more than 10% of our total revenue.

During the three and nine months ended December 31, 2013, one direct customer accounted for more than 10% of our total revenue, while no indirect channel partner accounted for more than 10% of our total revenue.

Historically, the Company has not experienced any significant failure of its customers to meet their payment obligations nor does the Company anticipate material non-performance by its customers in the future; accordingly, the Company does not require collateral from its customers. However, if the Company’s assumptions are incorrect, there could be an adverse impact on its allowance for doubtful accounts.

5

NOTE 3 – SHARE-BASED COMPENSATION

The following is a summary of share-based compensation expense including restricted stock units and employee stock purchases made under our employee stock purchase plan (ESPP) based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Cost of product revenue	$	85	$	62	$	238	$	174
Cost of service revenue	294		194		836		566
Research and development	1,455		1,157		3,971		3,316
Sales and marketing	1,221		944		3,419		2,952
General and administrative	1,095		860		3,483		2,951
	$	4,150	$	3,217	$	11,947	$	9,959

Employee Stock Purchase Plan – The Company maintains an ESPP for all eligible employees as described in the Company’s Annual Report on Form 10-K for the year ended March 31, 2014. Under the ESPP, shares of the Company’s common stock may be purchased on the last day of each bi-annual offering period at 85% of the fair value on the last day of such offering period. The offering periods run from March 1 through August 31 and from September 1 through February 28 of each year. During the nine months ended December 31, 2014, employees purchased 59,897 shares under the ESPP and the value per share was $46.07.

NOTE 4 – CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents and those investments with original maturities greater than three months to be marketable securities. Cash and cash equivalents consisted of money market instruments and cash maintained with various financial institutions at December 31, 2014 and March 31, 2014.

Marketable Securities

The following is a summary of marketable securities held by NetScout at December 31, 2014 classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	74,483	$	15		$	74,498
Commercial paper	7,586		4			7,590
Corporate bonds	5,882		(3		)	5,879
Total short-term marketable securities	87,951		16			87,967
U.S. government and municipal obligations	45,248		(45		)	45,203
Corporate bonds	852		0			852
Total long-term marketable securities	46,100		(45		)	46,055
Total marketable securities	$	134,051	$	(29	)	$	134,022

6

The following is a summary of marketable securities held by NetScout at March 31, 2014, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	53,854	$	26		$	53,880
Commercial paper	14,581		—			14,581
Corporate bonds	6,772		1			6,773
Total short-term marketable securities	75,207		27			75,234
U.S. government and municipal obligations	37,875		2			37,877
Corporate bonds	3,611		(4		)	3,607
Total long-term marketable securities	41,486		(2		)	41,484
Total marketable securities	$	116,693	$	25		$	116,718

Contractual maturities of the Company’s marketable securities held at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	December 31, 2014		March 31, 2014
Available-for-sale securities:
Due in 1 year or less	$	87,967	$	75,234
Due after 1 year through 5 years	46,055		41,484
	$	134,022	$	116,718

NOTE 5 – FAIR VALUE MEASUREMENTS

The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant non-observable inputs. The following tables present the Company’s financial assets and liabilities measured on a recurring basis using the fair value hierarchy at December 31, 2014 and March 31, 2014 (in thousands).

	Fair Value Measurements at
	December 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	106,704	$	—		$	—		$	106,704
U.S. government and municipal obligations	39,852		79,849			—			119,701
Commercial paper	—		7,590			—			7,590
Corporate bonds	6,731		—			—			6,731
Derivative financial instruments	—		16			—			16
	$	153,287	$	87,455		$	—		$	240,742
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,445	)	$	(4,445	)
Derivative financial instruments	—		(1,223		)	—			(1,223		)
	$	—	$	(1,223	)	$	(4,445	)	$	(5,668	)

7

	Fair Value Measurements at
	March 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	82,079	$	19,997		$	—		$	102,076
U.S. government and municipal obligations	21,992		69,765			—			91,757
Commercial paper	—		14,581			—			14,581
Corporate bonds	10,380		—			—			10,380
Derivative financial instruments	—		368			—			368
	$	114,451	$	104,711		$	—		$	219,162
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,291	)	$	(4,291	)
Contingent contractual non-compliance liability	—		—			(49		)	(49		)
Derivative financial instruments	—		(139		)	—			(139		)
	$	—	$	(139	)	$	(4,340	)	$	(4,479	)

This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at fair value, including marketable securities and derivative financial instruments.

The Company’s Level 1 investments are classified as such because they are valued using quoted market prices or alternative pricing sources with reasonable levels of price transparency.

The Company’s Level 2 investments are classified as such because fair value is being calculated using data from similar but not identical sources, or a discounted cash flow model using the contractual interest rate as compared to the underlying interest yield curve. The Company's derivative financial instruments consist of forward foreign exchange contracts and are classified as Level 2 because the fair values of these derivatives are determined using models based on market observable inputs, including spot prices for foreign currencies and credit derivatives, as well as an interest rate factor. The Company classifies municipal obligations as level 2 because the fair values are determined using quoted prices from markets the Company considers to be inactive. Commercial paper is classified as Level 2 because the Company uses market information from similar but not identical instruments and discounted cash flow models based on interest rate yield curves to determine fair value. For further information on the Company's derivative instruments refer to Note 8.

The Company’s contingent purchase consideration at December 31, 2014 and March 31, 2014 was classified as Level 3 in the fair value hierarchy. The contingent contractual non-compliance liability was also classified as Level 3 at March 31, 2014. At December 31, 2014, the contingent contractual obligation has been reduced to zero as NetScout has either settled those liabilities or believes that because of the passage of time that the probability of a future negative settlement is essentially zero. These liabilities are valued by probability weighting expected payment scenarios and then applying a discount based on the present value of the future cash flow streams. They are classified as Level 3 because the probability weighting of future payment scenarios is based on assumptions developed by management.

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the nine months ended December 31, 2014 (in thousands):

	Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at beginning of period	$	(4,291	)	$	(49	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(154		)	49
Balance at end of period	$	(4,445	)	$	—

The Company has updated the probabilities used in the fair value calculation of the contingent liabilities at December 31, 2014 which reduced the liability by $9 thousand and is included as part of earnings for the nine months ended December 31, 2014. Key assumptions include a 3.3% discount rate, and a percent weighted-probability of the settlement of the contingent contractual non-compliance liability. Deal related compensation expense, accretion charges and changes related to settlements

8

of contractual non-compliance liabilities for the nine months ended December 31, 2014 was $114 thousand and was included as part of earnings.

NOTE 6 – INVENTORIES

Inventories are stated at the lower of actual cost or net realizable value. Cost is determined by using the first in, first out (FIFO) method. Inventories consist of the following (in thousands):

	December 31, 2014		March 31, 2014
Raw materials	$	3,257	$	6,025
Work in process	127		161
Finished goods	6,890		6,394
	$	10,274	$	12,580

NOTE 7 – GOODWILL AND INTANGIBLE ASSETS

Goodwill

The Company has two reporting units: (1) Unified Service Delivery and (2) Test Optimization. At December 31, 2014 and March 31, 2014, goodwill attributable to the Unified Service Delivery reporting unit was $197.9 million and $201.0 million, respectively. Goodwill attributable to the Test Optimization reporting unit was $2.4 million at December 31, 2014 and March 31, 2014. Goodwill is tested for impairment at a reporting unit level at least annually, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the reporting unit below its carrying value.

The change in the carrying amount of goodwill for the nine months ended December 31, 2014 is due to the impact of foreign currency translation adjustments related to asset balances that are recorded in currencies other than the U.S. Dollar.

The changes in the carrying amount of goodwill for the nine months ended December 31, 2014 are as follows (in thousands):

Balance at March 31, 2014	$	203,446
Foreign currency translation impact for the nine months ended December 31, 2014	(3,175		)
Balance at December 31, 2014	$	200,271

Intangible Assets

The net carrying amounts of intangible assets were $52.5 million and $58.5 million at December 31, 2014 and March 31, 2014, respectively. Intangible assets acquired in a business combination are recorded under the acquisition method of accounting at their estimated fair values at the date of acquisition. The Company amortizes intangible assets over their estimated useful lives, except for the acquired trade name which resulted from the Network General Central Corporation (Network General) acquisition, which has an indefinite life and thus is not amortized. The carrying value of the indefinite lived trade name is evaluated for potential impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.

During the fiscal year ended March 31, 2014, the Company acquired certain rights to Accanto Systems, S.r.l. (Accanto) software not previously purchased as part of the acquisition transaction in fiscal year 2013 for $500 thousand.  This amount is included within developed technology and is being amortized using the economic benefit method and a useful life of 6.3 years.

During the fiscal year ended March 31, 2014, the Company acquired a certain technology license for $300 thousand. This amount is included within developed technology at March 31, 2014 and is being amortized using the economic benefit method and a useful life of 3 years.

9

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at December 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,374	$	(25,201	)	$	6,173
Customer relationships	38,641		(16,240		)	22,401
Distributor relationships	1,787		(727		)	1,060
Core technology	7,331		(3,472		)	3,859
Non-compete agreements	315		(315		)	—
Other	901		(525		)	376
	$	80,349	$	(46,480	)	$	33,869

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,946	$	(23,524	)	$	8,422
Customer relationships	38,801		(14,046		)	24,755
Distributor relationships	2,014		(568		)	1,446
Core technology	7,572		(2,701		)	4,871
Non-compete agreements	355		(295		)	60
Other	769		(410		)	359
	$	81,457	$	(41,544	)	$	39,913

Amortization of software and core technology included as cost of product revenue was $905 thousand and $2.8 million for the three and nine months ended December 31, 2014, respectively. Amortization of other intangible assets included as operating expense was $858 thousand and $2.7 million for the three and nine months ended December 31, 2014, respectively.

Amortization of software and core technology included as cost of product revenue was $837 thousand and $2.5 million for the three and nine months ended December 31, 2013, respectively. Amortization of other intangible assets included as operating expense was $891 thousand and $2.7 million for the three and nine months ended December 31, 2013, respectively.

The following is the expected future amortization expense at December 31, 2014 for the years ending March 31 (in thousands):

2015 (remaining three months)	$	1,759
2016	6,455
2017	5,850
2018	5,004
2019	4,044
Thereafter	10,757
	$	33,869

The weighted average amortization period of developed technology and core technology is 6.7 years. The weighted average amortization period for customer and distributor relationships is 13.3 years. The weighted average amortization period for amortizing all intangible assets is 10.1 years.

10

NOTE 8 – DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

NetScout operates internationally and, in the normal course of business, is exposed to fluctuations in foreign currency exchange rates. The exposures result from costs that are denominated in currencies other than the U.S. Dollar, primarily the Euro, British Pound, Canadian Dollar, and Indian Rupee. The Company manages its foreign cash flow risk by hedging forecasted cash flows for operating expenses denominated in foreign currencies for up to twelve months, within specified guidelines through the use of forward contracts. The Company enters into foreign currency exchange contracts to hedge cash flow exposures from costs that are denominated in currencies other than the U.S. Dollar. These hedges are designated as cash flow hedges at inception.

All of the Company’s derivative instruments are utilized for risk management purposes, and the Company does not use derivatives for speculative trading purposes. These contracts will mature over the next twelve months and are expected to impact earnings on or before maturity.

The notional amounts and fair values of derivative instruments in the consolidated balance sheets at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	Notional Amounts (a)				Other Current Assets				Accrued Other Liabilities
	December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014
Derivatives Designated as Hedging Instruments:
Forward contracts	$	19,776	$	17,483	$	16	$	368	$	1,223	$	139

(a) Notional amounts represent the gross contract/notional amount of the derivatives outstanding.

The following table provides the effect foreign exchange forward contracts had on other comprehensive income (loss) (OCI) and results of operations for the three months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014			December 31, 2013
Forward contracts	$	(924	)	$	87	Research and development	$	1		$	(109	)	Research and development	$	(46	)	$	75
						Sales and marketing	(348		)	149			Sales and marketing	(5		)	3
	$	(924	)	$	87		$	(347	)	$	40			$	(51	)	$	78

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

11

The following table provides the effect foreign exchange forward contracts had on OCI and results of operations for the nine months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014		December 31, 2013
Forward contracts	$	(1,663	)	$	90	Research and development	$	23		$	(293	)	Research and development	$	148	$	172
						Sales and marketing	(333		)	44			Sales and marketing	24		(3		)
	$	(1,663	)	$	90		$	(310	)	$	(249	)		$	172	$	169

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

NOTE 9 – LONG-TERM DEBT

On November 22, 2011, the Company entered into a credit facility (the Credit Agreement) with a syndicate of lenders led by KeyBank National Association (KeyBank) providing the Company with a $250 million revolving credit facility, which may be increased to $300 million at any time up to 90 days before maturity. The revolving credit facility includes a swing line loan sub-facility of up to $10 million and a letter of credit sub-facility of up to $10 million. The credit facility under the Credit Agreement matures on November 21, 2016. At December 31, 2014, there were no amounts outstanding under this credit facility.

At the Company’s election, revolving loans under the Credit Agreement bear interest at either (a) a rate per annum equal to the highest of (1) KeyBank’s prime rate, (2) 0.50% in excess of the federal funds effective rate, or (3) one hundred (100.00) basis points in excess of the London Interbank Offered Rate (LIBOR) for one-month interest periods, or the Base Rate; or (b) the one-, two-, three-, or six-month per annum LIBOR, as selected by the Company, multiplied by the statutory reserve adjustment, or collectively, the Eurodollar Rate, in each case plus an applicable margin. Swing line loans will bear interest at the Base Rate plus the applicable Base Rate margin. The applicable margin depends on the Company’s leverage ratio, ranging from 100 basis points for Base Rate loans and 200 basis points for Eurodollar Rate loans if the Company’s consolidated leverage ratio is 2.50 to 1.00 or higher, down to 25 basis points for Base Rate loans and 125 basis points for Eurodollar Rate loans if the Company’s consolidated leverage ratio is 1.00 to 1.00 or less.

The Company may prepay loans under the Credit Agreement at any time, without penalty, subject to certain notice requirements. Debt is recorded at the amount drawn on the revolving credit facility plus interest based on floating rates reflective of changes in the market which approximates fair value.

The loans are guaranteed by each of the Company’s domestic subsidiaries and are collateralized by all of the assets of the Company and its domestic subsidiaries, as well as 65% of the capital stock of the Company’s foreign subsidiaries directly owned by the Company and its domestic subsidiaries. The Credit Agreement generally prohibits any other liens on the assets of the Company and its subsidiaries, subject to certain exceptions as described in the Credit Agreement. The Credit Agreement contains certain covenants applicable to the Company and its subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes (including material mergers and dispositions of assets), dividends and distributions, capital expenditures, investments (including material acquisitions and investments in foreign subsidiaries), transactions with affiliates, sale-leaseback transactions, hedge agreements, payment of junior financing, material changes in business, and other limitations customary in senior secured credit facilities. In addition, the Company is required to maintain certain consolidated leverage and interest coverage ratios as well as a minimum liquidity amount. At December 31, 2014, the Company was in compliance with all of these covenants.

12

NOTE 10 – RESTRUCTURING CHARGES

During the fiscal year ended March 31, 2013, the Company restructured part of its international sales organization related to an overlap of personnel acquired as part of the Accanto acquisition. The Company recorded $1.2 million of restructuring charges related to severance costs.

The following table provides a summary of the activity related to this restructuring plan and the related liability included as accrued compensation on the Company's consolidated balance sheet (in thousands):

	Three months ended		Nine Months Ended
Employee Severance:	December 31, 2014		December 31, 2014
Balance at beginning of period	$	—	$	71
Other adjustments	—		—
Cash payments	—		(71		)
Balance at December 31, 2014	$	—	$	—

NOTE 11 – COMMITMENTS AND CONTINGENCIES

Acquisition related– The Company recorded two contingent liabilities related to the acquisition of Simena, LLC (Simena), one relates to future consideration to be paid to the former owner which had an initial fair value of $8.0 million at the time of acquisition and another relates to contractual non-compliance liabilities incurred by Simena with an initial fair value of $1.6 million at the time of acquisition. At December 31, 2014, the present value of the future consideration was $4.4 million and the contractual non-compliance liability was $0. The contingent contractual obligation has been reduced to zero as NetScout has either settled those liabilities or believes that because of the passage of time that the probability of a future negative settlement is essentially zero.

Legal – From time to time, NetScout is subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a significant adverse effect on the Company’s financial condition, results of operations or cash flows.

NOTE 12 – TREASURY STOCK

On September 17, 2001, the Company announced an open market stock repurchase program to purchase up to one million shares of outstanding Company common stock, subject to market conditions and other factors. Any purchases under the Company’s stock repurchase program may be made from time to time without prior notice. On July 26, 2006, the Company announced that it had expanded the existing open market stock repurchase program to enable the Company to purchase up to an additional three million shares of the Company’s outstanding common stock, bringing the total number of shares authorized for repurchase to four million shares. Through June 30, 2014, the Company had repurchased a total of 4,000,000 shares of common stock through the open market stock repurchase program. The Company repurchased 243,300 shares for $9.4 million under this program during the nine months ended December 31, 2014. At June 30, 2014, all authorized shares under this stock repurchase program have been repurchased.

On April 22, 2014, the Company's board of directors approved an additional stock repurchase program. This program authorizes management to make additional repurchases of NetScout outstanding common stock of up to $100 million. The share repurchase authorization does not have an expiration date and the pace and timing of repurchases will depend on factors such as cash generation from operations, cash requirements for acquisitions, economic and market conditions, stock price and legal and regulatory requirements. Through December 31, 2014, the Company has repurchased 256,700 shares totaling $11.5 million in the open market under this stock repurchase plan. At December 31, 2014, $88.5 million of common stock remained available to be purchased under the plan.

In connection with the vesting and release of the restriction on previously vested shares of restricted stock units, the Company repurchased 243,063 shares for $10.6 million related to minimum statutory tax withholding requirements on these restricted stock units during the nine months ended December 31, 2014. These repurchase transactions do not fall under the repurchase program described above, and therefore do not reduce the amount that is available for repurchase under that program.

13

NOTE 13 – NET INCOME PER SHARE

Calculations of the basic and diluted net income per share and potential common shares are as follows (in thousands, except for per share data):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Numerator:
Net income	$	17,629	$	17,294	$	40,338	$	32,430
Denominator:
Denominator for basic net income per share - weighted average common shares outstanding	41,206		41,425		41,128		41,417
Dilutive common equivalent shares:
Weighted average stock options	7		43		11		63
Weighted average restricted stock units	323		416		540		489
Denominator for diluted net income per share - weighted average shares outstanding	41,536		41,884		41,679		41,969
Net income per share:
Basic net income per share	$	0.43	$	0.42	$	0.98	$	0.78
Diluted net income per share	$	0.42	$	0.41	$	0.97	$	0.77

The following table sets forth restricted stock units excluded from the calculation of diluted net income per share, since their inclusion would be antidilutive (in thousands):

	Three Months Ended		Nine Months Ended
	December 31,		December 31,
	2014	2013	2014	2013
Restricted stock units	19	—	12	195

Basic EPS is calculated by dividing net income by the weighted average number of shares outstanding during the period. Unvested restricted shares, although legally issued and outstanding, are not considered outstanding for purposes of calculating basic earnings per share. Diluted EPS is calculated by dividing net income by the weighted average number of shares outstanding plus the dilutive effect, if any, of outstanding stock options, restricted shares and restricted stock units using the treasury stock method. The calculation of the dilutive effect of outstanding equity awards under the treasury stock method includes consideration of proceeds from the assumed exercise of stock options, unrecognized compensation expense and any tax benefits as additional proceeds.

NOTE 14 – INCOME TAXES

Our effective income tax rates were 35.7% and 36.7% for the three months ended December 31, 2014 and 2013, respectively.  Generally, the effective tax rates differ from statutory rates due to the impact of the domestic production activities deduction, research and development credits if enacted, the impact of state taxes, income generated in jurisdictions that have a different tax rate than the U.S. statutory rate, and losses not benefited in certain foreign jurisdictions.The effective tax rate for the three months ended December 31, 2014 is lower than the effective rate for the three months ended December 31, 2013 primarily due to the increase in the domestic production activities deduction as well as the delayed reenactment of the research and development tax credit.

Our effective tax rates were 37.9% and 37.6% for the nine months ended December 31, 2014 and 2013, respectively. At this time, the effective tax rate is higher than the comparable year primarily due to an increase in certain foreign losses for which a benefit cannot be realized.

NOTE 15 – SEGMENT AND GEOGRAPHIC INFORMATION

The Company reports revenues and income under one reportable segment. The consolidated financial information is used by the chief operating decision maker in deciding how to allocate resources and in assessing performance.

14

The Company manages its business in the following geographic areas: United States, Europe, Asia and the rest of the world. In accordance with United States export control regulations, the Company does not sell or do business with countries subject to economic sanctions and export controls.

Total revenue by geography is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
United States	$	88,905	$	86,747	$	254,260	$	216,364
Europe	16,981		12,313		37,032		33,906
Asia	8,075		4,035		19,464		14,788
Rest of the world	8,872		7,333		23,528		19,272
	$	122,833	$	110,428	$	334,284	$	284,330

The United States revenue includes sales to resellers in the United States. These resellers fulfill customer orders and may subsequently ship the Company’s products to international locations. The Company reports these shipments as United States revenue since the Company ships the products to a United States location. A majority of revenue attributable to locations outside of the United States is a result of export sales. Substantially all of the Company’s identifiable assets are located in the United States.

NOTE 16 - RELATED PARTY TRANSACTION

A member of the Company’s Board of Directors also serves as a member of the board of directors for EMC, Corp. (EMC) and therefore, the Company considers the sale of equipment to EMC to be a related party transaction.  The Company generated $208 thousand in revenue from EMC during the nine months ended December 31, 2014.

NOTE 17 – PROPOSED ACQUISITION

On October 12, 2014, NetScout Systems, Inc., Danaher Corporation (Danaher), Potomac Holding LLC, a wholly-owned subsidiary of Danaher (Newco), RS Merger Sub I, Inc., a wholly-owned subsidiary of the Company (Merger Sub) and RS Merger Sub II, LLC, a wholly-owned subsidiary of the Company (Merger Sub II and, together with Merger Sub, the Merger Subs), entered into an Agreement and Plan of Merger and Reorganization (Merger Agreement) pursuant to which the Company will acquire the communications group business of Danaher conducted under the brands Tektronix Communications, Fluke Networks and Arbor Networks (Communications Business), but excluding Danaher’s data communications cable installation business and its communication service provider business in a Reverse Morris Trust transaction (the Transaction).

Prior to the Mergers (as defined below) and pursuant to a Separation and Distribution Agreement (Distribution Agreement), dated as of October 12, 2014, among Danaher, Newco and the Company, Danaher will, among other things, transfer the Communications Business to Newco and, thereafter, Danaher will distribute to Danaher stockholders all of the issued and outstanding shares of Newco (the Distribution).

Immediately following the Distribution, the Company, Danaher, Newco and the Merger Subs will effect a two-step merger process whereby (i) Merger Sub I will merge with and into Newco, with Newco continuing as the surviving corporation (the First Merger) and (ii) immediately following the First Merger, Newco will merge with and into Merger Sub II, with Merger Sub II surviving as a wholly-owned subsidiary of the Company (the Second Merger, and together with the First Merger, the Mergers).

Upon consummation of the transactions contemplated by the Merger Agreement and the Distribution Agreement, the common units of Newco then outstanding will be automatically converted into 62.5 million shares of the Company’s common stock (the Company Common Stock) and will represent approximately 59.5% of the Company Common Stock outstanding after giving effect to the stock issuance in the Transaction. The Company’s existing stockholders will continue to hold the remaining approximately 40.5% of the Company Common Stock. The common units of Newco then outstanding could convert into more than 62.5 million shares of the Company’s common stock if the Company issues Company Common Stock in certain acquisitions prior to the First Merger (in which case such additional conversion shares shall be calculated by multiplying 1.46 by the number of shares of Company Common Stock issued in such acquisition).

15

The consummation of the First Merger is subject to various customary closing conditions, including, among other things (i) accuracy of Danaher’s and the Company’ representations and warranties, (ii) compliance by Danaher and the Company with certain covenants in the Merger Agreement, (iii) effectiveness of the registration statements to be filed with the Securities and Exchange Commission to register the Newco common units and the Company Common Stock to be issued to Danaher’s stockholders, (iv) approval of the Company’s stockholders of the issuance of the Company Common Stock in the First Merger, (v) completion of the transactions contemplated by the Distribution Agreement, (vi) no material adverse effect shall have occurred with respect to either the Company or the Communications Business, (vii) expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvement Act of 1976, as amended, (viii) absence of any law or order from any court or governmental authority restraining, enjoining or prohibiting the Transaction, (ix) receipt of certain rulings from the Internal Revenue Service and (x) receipt of certain tax opinions from tax counsel to Danaher.

The Merger Agreement contains certain termination rights for both the Company and Danaher and further provides that, upon termination of the Merger Agreement under specified circumstances, the Company must pay Danaher a termination fee of $55 million. The circumstances under which the Company must pay Danaher the termination fee include, among other circumstances:

•the Merger Agreement is terminated by Danaher following a Company triggering event. A Company triggering event is defined in the Merger Agreement to include, among other things, the failure of the Company’s board of directors to recommend that the Company’s stockholders vote in favor of the issuance of the Company Common Stock in the First Merger, the withdrawal or adverse modification by the Company’s board of directors of such recommendation, or the Company’s material breach of its covenants not to solicit any alternative acquisition proposal.

•(1) a competing bona fide acquisition proposal is presented by a third party to the Company or its stockholders, (2) the Merger Agreement is thereafter terminated (A) by either party for failure to close before October 12, 2015, (B) by Danaher as a result of a breach by the Company of its representations or covenants that results in the failure of a closing condition that cannot be cured or (C) by either Danaher or the Company because the Company has failed to obtain stockholder approval, and (3) within 9 months after the termination of the Merger Agreement, the Company enters into an agreement for or consummates an acquisition proposal made by a third party.

The Company has incurred $6.2 million in acquisition related costs during the nine months ended December 31, 2014.

In connection with RBC Capital Markets’ services as NetScout’s financial advisor, NetScout has agreed to pay RBC Capital Markets an aggregate fee of $11 million, a portion of which was payable upon delivery of RBC Capital Markets’ opinion and $9.5 million of which is contingent upon consummation of the Mergers. NetScout also has agreed to reimburse RBC Capital Markets for expenses reasonably incurred in connection with RBC Capital Markets’ services and to indemnify RBC Capital Markets and related persons against certain liabilities, including liabilities under the federal securities laws, arising out of RBC Capital Markets’ engagement.

The transaction is expected to increase NetScout’s scale and broaden its customer base in both the service provider and enterprise markets, while accelerating NetScout’s entry into the Cyber Intelligence market.  The transaction is expected to close in the first half of NetScout’s fiscal year 2016.

16

Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

In addition to historical information, the following discussion and other parts of this Quarterly Report contain forward-looking statements under Section 21E of the Exchange Act and other federal securities laws. These forward looking statements involve risks and uncertainties. These statements relate to future events or our future financial performance and are identified by terminology such as “may,” “will,” “could,” “should,” “expects,” “plans,” “intends,” “seeks,” “anticipates,” “believes,” “estimates,” “potential” or “continue,” or the negative of such terms or other comparable terminology. These statements are only predictions. You should not place undue reliance on these forward-looking statements. Actual events or results may differ materially due to competitive factors and other factors referred to in Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K for our fiscal year ended March 31, 2014 and elsewhere in this Quarterly Report. These factors may cause our actual results to differ materially from any forward-looking statement.

Overview

NetScout was founded in 1984 and is headquartered in Westford, Massachusetts. We are an industry leader for advanced network, application and service assurance solutions, providing high-quality performance analytics and operational intelligence solutions that facilitate the evolution toward new computing paradigms, such as virtualization, mobility and cloud. We design, develop, manufacture, market, license, sell and support these products focused on assuring service delivery quality, performance and availability for some of the world’s largest, most demanding and complex internet protocol (IP) based service delivery environments. We manufacture and market these products in integrated hardware and software solutions that are used by commercial enterprises, large governmental agencies and telecommunication service providers worldwide. We have a single operating segment and substantially all of our identifiable assets are located in the United States.

Our operating results are influenced by a number of factors, including, but not limited to, the mix and quantity of products and services sold, pricing, costs of materials used in our products, growth in employee related costs, including commissions, and the expansion of our operations. Factors that affect our ability to maximize our operating results include, but are not limited to, our ability to introduce and enhance existing products, the marketplace acceptance of those new or enhanced products, continued expansion into international markets, development of strategic partnerships, competition, successful acquisition integration efforts, our ability to achieve expense reductions and make structural improvements and current economic conditions.

Our key objectives have been to continue to gain market share in the wireless service provider market and to accelerate our enterprise growth by extending into the application performance management segment. The development and mid-2013 launch of our nGeniusONE unified performance management platform, which is powered by our patented, proprietary Adaptive Session Intelligence software, has been a critical component in our ability to make progress toward achieving these objectives. The enhancement and expansion of our nGeniusONE solutions has been bolstered by our acquisitions and integration of both voice/video and packet flow or monitoring switch technology.

On October 12, 2014, NetScout, Danaher Corporation (Danaher), Potomac Holding LLC, a wholly-owned subsidiary of Danaher (Newco), RS Merger Sub I, Inc., a wholly-owned subsidiary of the Company (Merger Sub) and RS Merger Sub II, LLC, a wholly-owned subsidiary of the Company (Merger Sub II and, together with Merger Sub, the Merger Subs), entered into an Agreement and Plan of Merger and Reorganization (Merger Agreement) pursuant to which the Company will acquire the communications group business of Danaher conducted under the brands Tektronix Communications, Fluke Networks and Arbor Networks, but excluding Danaher’s data communications cable installation business and its communication service provider business (Communications Business) in a Reverse Morris Trust transaction (the Transaction). For additional information regarding the proposed acquisition, see Note 17 of our Notes to Consolidated Financial Statements.

Results Overview

We generated continued growth during the quarter ended December 31, 2014, with product revenue growth of 12% and overall revenue growth of 11% compared to the same period in the prior year.

Our business has maintained strong gross profit margins. Our gross profit for the quarter ended December 31, 2014 increased by $9.0 million, or 10%, when compared to the quarter ended December 31, 2013. The gross profit percentage decreased by one point to 78% during the quarter ended December 31, 2014, when compared to the quarter ended December 31, 2013.

The combination of continued revenue growth, strong gross profit margins and a scalable infrastructure supported by prudent investment across key areas of our business, including research and development initiatives, and sales and marketing programs, has enabled us produce strong operating profit margins. Despite higher one-time expenses associated with the aforementioned

17

acquisition of Danaher’s Communications Business, our operating profit margin for the quarter ended December 31, 2014 was 23%, as compared to 25% for the same quarter one year ago.

We continue to maintain strong liquidity. At December 31, 2014, we had cash, cash equivalents and marketable securities of $240.7 million. This represents an increase of $21.9 million from March 31, 2014.

Use of Non-GAAP Financial Measures

We supplement the generally accepted accounting principles (GAAP) financial measures we report in quarterly and annual earnings announcements, investor presentations and other investor communications by reporting the following non-GAAP measures: non-GAAP revenue, non-GAAP net income and non-GAAP net income per diluted share. Non-GAAP revenue eliminates the GAAP effects of acquisitions by adding back revenue related to deferred revenue revaluation. Non-GAAP net income includes the foregoing adjustment and also removes expenses related to the amortization of acquired intangible assets, share-based compensation, restructuring, certain expenses relating to acquisitions including compensation for post-combination services and business development charges, net of related income tax effects. Non-GAAP diluted net income per share also excludes these expenses as well as the related impact of all these adjustments on the provision for income taxes.

These non-GAAP measures are not in accordance with GAAP, should not be considered an alternative for measures prepared in accordance with GAAP (revenue, net income and diluted net income per share), and may have limitations in that they do not reflect all our results of operations as determined in accordance with GAAP. These non-GAAP measures should only be used to evaluate our results of operations in conjunction with the corresponding GAAP measures. The presentation of non-GAAP information is not meant to be considered superior to, in isolation from, or as a substitute for results prepared in accordance with GAAP.

Management believes these non-GAAP financial measures enhance the reader's overall understanding of our current financial performance and its prospects for the future by providing a higher degree of transparency for certain financial measures and providing a level of disclosure that helps investors understand how we plan and measure our business. We believe that providing these non-GAAP measures affords investors a view of our operating results that may be more easily compared to our peer companies and also enables investors to consider our operating results on both a GAAP and non-GAAP basis during and following the integration period of our acquisitions. Presenting the GAAP measures on their own may not be indicative of our core operating results. Furthermore, management believes that the presentation of non-GAAP measures when shown in conjunction with the corresponding GAAP measures provide useful information to management and investors regarding present and future business trends relating to our financial condition and results of operations.

The following table reconciles revenue, net income and net income per share on a GAAP and non-GAAP basis for the three and nine months endedDecember 31, 2014 and 2013 (in thousands, except for per share amounts):

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
GAAP revenue	$	122,833		$	110,428		$	334,284		$	284,330
Deferred revenue fair value adjustment	—			140			18			419
Non-GAAP revenue	$	122,833		$	110,568		$	334,302		$	284,749
GAAP net income	$	17,629		$	17,294		$	40,338		$	32,430
Deferred revenue fair value adjustment	—			140			18			419
Share based compensation expense	4,150			3,217			11,947			9,959
Amortization of acquired intangible assets	1,726			1,697			5,301			5,051
Business development and integration expense	4,698			78			6,175			482
Compensation for post combination services	312			530			1,393			1,685
Income tax adjustments	(3,909		)	(1,941		)	(8,727		)	(6,034		)
Non-GAAP net income	$	24,606		$	21,015		$	56,445		$	43,992
GAAP diluted net income per share	$	0.42		$	0.41		$	0.97		$	0.77
Per share impact of non-GAAP adjustments identified above	0.17			0.09			0.38			0.28
Non-GAAP diluted net income per share	$	0.59		$	0.50		$	1.35		$	1.05

18

Critical Accounting Policies

 Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America consistently applied. The preparation of these consolidated financial statements requires us to make significant estimates and judgments that affect the amounts reported in our consolidated financial statements and the accompanying notes. These items are regularly monitored and analyzed by management for changes in facts and circumstances, and material changes in these estimates could occur in the future. Changes in estimates are recorded in the period in which they become known. We base our estimates on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Actual results may differ from our estimates.

While all of our accounting policies impact the consolidated financial statements, certain policies are viewed to be critical. Critical accounting policies are those that are both most important to the portrayal of our financial condition and results of operations and that require management's most subjective or complex judgments and estimates. We consider the following accounting policies to be critical in fully understanding and evaluating our financial results:

• marketable securities;

• revenue recognition;

• valuation of goodwill, intangible assets and other acquisition accounting items; and

• share-based compensation.

Please refer to the critical accounting policies set forth in our Annual Report on Form 10-K for the fiscal year ended March 31, 2014, filed with the Securities and Exchange Commission (SEC) on May 20, 2014, for a description of all of our critical accounting policies.

Three Months Ended December 31, 2014 and 2013

Revenue

Product revenue consists of sales of our hardware products and licensing of our software products. Service revenue consists of customer support agreements, consulting and training. During the three months ended December 31, 2014, no direct customer or indirect channel partner accounted for more than 10% of our total revenue. During the three months ended December 31, 2013, one direct customer accounted for more than 10% of our total revenue, while no indirect channel partner accounted for more than 10% of our total revenue.

	Three Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$		%
Revenue:
Product	$	76,446	62	%	$	68,561	62	%	$	7,885	12	%
Service	46,387		38		41,867		38		4,520		11	%
Total revenue	$	122,833	100	%	$	110,428	100	%	$	12,405	11	%

Product.The 12%, or $7.9 million, increase in product revenue was due to a $7.7 million increase in revenue from our general enterprise sector, and a $5.6 million increase in our government enterprise sector. This reflects increased demand primarily from existing customers and, to a lesser extent, success in winning business with new customers. These increases were partially offset by a $5.4 million decrease from our service provider sector which reflects the timing and magnitude of various projects with service providers. Compared to the same period in the prior year, we realized a 9% increase in units shipped, while the average selling price per unit of our products remained flat.

We expect continued growth in all major sectors through the year ended March 31, 2015.

Service.The 11%, or $4.5 million, increase in service revenue was due to a $3.4 million increase in revenue from new maintenance contracts and renewals from a growing support base and a $1.2 million increase in premium support contracts. We

19

expect continued service revenue growth to be generated by product revenue growth which increases our installed base and therefore our related maintenance contracts.

Total product and service revenue from direct and indirect channels are as follows:

	Three Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$			%
Indirect	$	70,380	57	%	$	53,930	49	%	$	16,450		31	%
Direct	52,453		43		56,498		51		(4,045		)	(7	)%
Total revenue	$	122,833	100	%	$	110,428	100	%	$	12,405		11	%

The 31%, or $16.5 million, increase in indirect channel revenue is the result of the increase in sales to our government enterprise sector in the United States, as well as in our service provider and general enterprise sector internationally. Sales to customers outside the United States are export sales typically through channel partners, who are generally responsible for distributing our products and providing technical support and service to customers within their territories. Our reported international revenue does not include any revenue from sales to customers outside the United States that are shipped to our United States-based indirect channel partners. These domestic resellers fulfill customer orders based upon joint selling efforts in conjunction with our direct sales force and may subsequently ship our products to international locations; however, we report these shipments as United States revenue since we ship the products to a domestic location. The 7%, or $4.0 million, decrease in direct revenue is primarily the result of decreased domestic revenue from our service provider and government sectors, partially offset by increases in our general enterprise sector.

Total revenue by geography is as follows:

	Three Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$		%
United States	$	88,905	72	%	$	86,747	79	%	$	2,158	2	%
International:
Europe	16,981		14		12,313		11		4,668		38	%
Asia	8,075		7		4,035		4		4,040		100	%
Rest of the world	8,872		7		7,333		6		1,539		21	%
Subtotal international	33,928		28		23,681		21		10,247		43	%
Total revenue	$	122,833	100	%	$	110,428	100	%	$	12,405	11	%

United States revenues increased 2%, or $2.2 million, primarily due to gains within the general enterprise and government sectors, offset by a decrease in the service provider sector. The 43%, or $10.2 million, increase in international revenue is due to increases across the service provider and general enterprise sectors. In Asia, the volume of orders as well as dollar size of the orders increased when compared to the three months ended December 31, 2013. We expect revenue from sales to customers outside the United States to continue to account for a significant portion of our total revenue in the future. In accordance with United States export control regulations we do not sell to, or do business with, countries subject to economic sanctions and export controls.

20

Cost of Revenue and Gross Profit

Cost of product revenue consists primarily of material components, manufacturing personnel expenses, manuals, packaging materials, overhead and amortization of capitalized software, acquired software and core technology. Cost of service revenue consists primarily of personnel, material, overhead and support costs.

	Three Months Ended										Change
	December 31,
	(Dollars in Thousands)
	2014					2013
				% of Revenue					% of Revenue		$			%
Cost of revenue
Product	$	18,310		15	%	$	14,534		13	%	$	3,776		26	%
Service	8,672			7		9,068			8		(396		)	(4	)%
Total cost of revenue	$	26,982		22	%	$	23,602		21	%	$	3,380		14	%
Gross profit:
Product $	$	58,136		47	%	$	54,027		49	%	$	4,109		8	%
Product gross profit %	76		%			79		%
Service $	$	37,715		31	%	$	32,799		30	%	$	4,916		15	%
Service gross profit %	81		%			78		%
Total gross profit $	$	95,851				$	86,826				$	9,025		10	%
Total gross profit %	78		%			79		%

Product. The 26%, or $3.8 million, increase in cost of product revenue was primarily due to the 12%, or $7.9 million, increase in product revenue during the three months ended December 31, 2014. In addition, there was a $1.8 million increase in obsolescence charges for the three months ended December 31, 2014. The product gross profit percentage decreased by three percentage points to 76% during the three months ended December 31, 2014 as compared to the three months ended December 31, 2013. The 8%, or $4.1 million, increase in product gross profit corresponds with the 12%, or $7.9 million, increase in product revenue, offset by the 26%, or $3.8 million, increase in cost of product revenue. Average headcount in manufacturing was 33 and 32 for the three months ended December 31, 2014 and 2013, respectively.

Service. The 4%, or $396 thousand, decrease in cost of service revenue was primarily due to a $732 thousand decrease in the cost of materials used to support customers under service contracts, and a $424 thousand decrease in allocated overhead. These decreases were offset by a $747 thousand increase in employee related expenses resulting in part from headcount to support our growing installed base as well as increased compensation related items. The service gross profit percentage increased by three percentage points to 81% for the three months ended December 31, 2014 as compared to the three months ended December 31, 2013. The 15%, or $4.9 million, increase in service gross profit corresponds with the 11%, or $4.5 million, increase in service revenue, and the 4%, or $396 thousand, decrease in cost of services. Average service headcount was 168 and 145 for the three months ended December 31, 2014 and 2013, respectively.

Gross profit. Our gross profit increased 10%, or $9.0 million. This increase is attributable to our increase in revenue of 11%, or $12.4 million, partially offset by a 14%, or $3.4 million, increase in cost of revenue. The gross profit percentage decreased by one percentage point to 78% for the three months ended December 31, 2014 as compared to the three months ended December 31, 2013. Overall, we expect our gross profit percentage to remain relatively flat in future periods with increased sales volumes offset by corresponding increases in product and service costs.

21

Operating Expenses

	Three Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$			%
Research and development	$	18,864	15	%	$	18,348	17	%	$	516		3	%
Sales and marketing	34,836		28		32,425		29		2,411			7	%
General and administrative	13,391		11		7,929		7		5,462			69	%
Amortization of acquired intangible assets	821		1		860		1		(39		)	(5	)%
Total operating expenses	$	67,912	55	%	$	59,562	54	%	$	8,350		14	%

Research and development. Research and development expenses consist primarily of personnel expenses, fees for outside consultants, overhead and related expenses associated with the development of new products and the enhancement of existing products.

The 3%, or $516 thousand, increase in research and development expenses is due to a $584 thousand increase in employee related expenses resulting from increased headcount, a $292 thousand increase in depreciation expense, and a $259 thousand increase in consulting expenses. These increases were partially offset by a $343 thousand decrease in non-recurring engineering expenses, and a $104 thousand decrease in computer supplies expense. Average headcount in research and development was 363 and 347 for the three months ended December 31, 2014 and 2013, respectively.

Sales and marketing. Sales and marketing expenses consist primarily of personnel expenses and commissions, overhead and other expenses associated with selling activities and marketing programs such as trade shows, seminars, advertising, and new product launch activities.

The 7%, or $2.4 million, increase in total sales and marketing expenses was due to a $1.1 million increase in employee related expenses due to increased headcount and other employee related costs. In addition, there was a $465 thousand increase in advertising expenses, a $372 thousand increase in travel expenses, a $278 thousand increase in commissions, and a $224 thousand increase in consulting expenses. Average headcount in sales and marketing was 376 and 361 for the three months ended December 31, 2014 and 2013, respectively.

General and administrative. General and administrative expenses consist primarily of personnel expenses for executive, financial, legal and human resource employees, overhead and other corporate expenditures.

The 69%, or $5.5 million, increase in general and administrative expenses was primarily due to a $4.6 million increase in business development expenses due to the planned acquisition of the Danaher Communications Business as described in Note 17 , a $281 thousand increase in legal expenses, and a $250 thousand increase in employee related expenses due to compensation related items and other employee related costs. Average headcount in general and administrative was 126 and 116 for the three months ended December 31, 2014 and 2013, respectively.

Amortization of acquired intangible assets. Amortization of acquired intangible assets consists primarily of amortization of customer relationships related to the acquisitions of ONPATH Technologies, Inc. (ONPATH), Accanto, Simena, LLC (Simena), Fox Replay BV (Replay), Psytechnics, Ltd (Psytechnics) and Network General.

Interest and Other Income (Expense), Net. Interest and other income (expense), net includes interest earned on our cash, cash equivalents and marketable securities, interest expense and other non-operating gains or losses.

	Three Months Ended									Change
	December 31,
	(Dollars in Thousands)
	2014					2013
				% of Revenue				% of Revenue		$			%
Interest and other income (expense), net	$	(512	)	—	%	$	44	—	%	$	(556	)	(1,264	)%

22

The $556 thousand increase in interest and other expense was due to a $479 thousand increase in foreign currency exchange expense and a $209 thousand increase in loss on disposal of equipment. This increase to interest and other expense, net was partially offset by a $94 thousand increase in other income and a $29 thousand increase in interest income received on investments.

Income Tax Expense. Our effective income tax rates were 35.7% and 36.7% for the three months ended December 31, 2014 and 2013, respectively.  Generally, the effective tax rates differ from statutory rates due to the impact of the domestic production activities deduction, research and development credits if enacted, the impact of state taxes, income generated in jurisdictions that have a different tax rate than the U.S. statutory rate, and losses not benefited in certain foreign jurisdictions.The effective tax rate for the three months ended December 31, 2014 is lower than the comparable prior year period primarily due to the increase in the domestic production activities deduction as well as the delayed reenactment of the research and development tax credit.

	Three Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$			%
Income tax expense	$	9,798	8	%	$	10,014	9	%	$	(216	)	(2	)%

Nine months endedDecember 31, 2014 and 2013

Revenue

During the nine months endedDecember 31, 2014, no direct customer or channel partner accounted for more than 10% of our total revenue. During the nine months ended December 31, 2013, one direct customer accounted for more than 10% of our total revenue, while no indirect channel partner accounted for more than 10% of our total revenue.

	Nine Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$		%
Revenue:
Product	$	198,765	59	%	$	163,895	58	%	$	34,870	21	%
Service	135,519		41	%	120,435		42	%	15,084		13	%
Total revenue	$	334,284	100	%	$	284,330	100	%	$	49,954	18	%

Product.The 21%, or $34.9 million, increase in product revenue was due to a $12.8 million increase in revenue from our service provider sector, an $11.2 million increase in revenue from our government enterprise sector, and a $10.9 million increase in revenue from our general enterprise sector. Compared to the same period in the prior year, we realized a 12% increase in units shipped and a 5% increase in the average selling price per unit of our products.

Service.The 13%, or $15.1 million, increase in service revenue was due to an $11.6 million increase in revenue from maintenance contracts due to increased new maintenance contracts and renewals from a growing support base and a $3.7 million increase in premium support contracts. These were partially offset by a $161 thousand decrease in consulting revenue.

23

Total product and service revenue from direct and indirect channels are as follows:

	Nine Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$		%
Indirect	$	170,524	51	%	$	142,420	50	%	$	28,104	20	%
Direct	163,760		49		141,910		50		21,850		15	%
Total revenue	$	334,284	100	%	$	284,330	100	%	$	49,954	18	%

The 20%, or $28.1 million, increase in indirect channel revenue is the result of increases in sales to our government enterprise and general enterprise sectors in the United States. The 15%, or $21.9 million, increase in direct revenue is primarily the result of increased domestic revenue from our service provider customers.

Total revenue by geography is as follows:

	Nine Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$		%
United States	$	254,260	76	%	$	216,364	76	%	$	37,896	18	%
International:
Europe	37,032		11		33,906		12		3,126		9	%
Asia	19,464		6		14,788		5		4,676		32	%
Rest of the world	23,528		7		19,272		7		4,256		22	%
Subtotal international	80,024		24		67,966		24		12,058		18	%
Total revenue	$	334,284	100	%	$	284,330	100	%	$	49,954	18	%

United States revenues increased 18%, or $37.9 million, as a result of an increase across all sectors. The 18%, or $12.1 million, increase in international revenue is due to increases across the service provider and government enterprise sectors.

24

Cost of Revenue and Gross Profit

	Nine Months Ended										Change
	December 31,
	(Dollars in Thousands)
	2014					2013
				% of Revenue					% of Revenue		$		%
Cost of revenue
Product	$	45,015		13	%	$	36,117		13	%	$	8,898	25	%
Service	26,158			8		24,111			8		2,047		8	%
Total cost of revenue	$	71,173		21	%	$	60,228		21	%	$	10,945	18	%
Gross profit:
Product $	$	153,750		46	%	$	127,778		45	%	$	25,972	20	%
Product gross profit %	77		%			78		%
Service $	$	109,361		33	%	$	96,324		34	%	$	13,037	14	%
Service gross profit %	81		%			80		%
Total gross profit $	$	263,111				$	224,102				$	39,009	17	%
Total gross profit %	79		%			79		%

Product. The 25%, or $8.9 million, increase in cost of product revenue was mainly a result of the 21%, or $34.9 millionincrease in product revenue. In addition, there was a $2.0 million increase in obsolescence charges, a $348 thousand increase in manufacturing supplies expense, a $292 thousand increase in employee related expenses due to increased compensation related items, and a $276 thousand increase in amortization of software and core technology included as cost of product revenue. The product gross profit percentage decreased by one percentage point to 77% during the nine months ended December 31, 2014. Average headcount in manufacturing was 32 for the nine months ended December 31, 2014 and 2013.

Service. The 8%, or $2.0 million, increase in cost of service revenue was primarily due to a $3.2 million increase in employee related expenses resulting in part from increased headcount to support our growing installed base, as well as from increased compensation related items. In addition, there was a $174 thousand increase in depreciation expense, and a $168 thousand increase in travel expenses. These were partially offset by a $902 thousand decrease in allocated overhead and a $638 thousand decrease in cost of materials used to support customers under service contracts. The service gross profit percentage increased by one percentage point to 81% for the nine months ended December 31, 2014 when compared to the nine months endedDecember 31, 2013. The 14%, or $13.0 million, increase in service gross profit corresponds with the 13%, or $15.1 million, increase in service revenue, partially offset by the 8%, or $2.0 million, increase in cost of services. Average service headcount was 164 and 144 for the nine months ended December 31, 2014 and 2013, respectively.

Gross profit. Our gross profit increased 17%, or $39.0 million. This increase is attributable to our increase in revenue of 18% or $50.0 million, partially offset by an 18%, or $10.9 million, increase in cost of revenue. The gross profit percentage remained flat at 79% for the nine months ended December 31, 2014 when compared to the nine months ended December 31, 2013.

25

Operating Expenses

	Nine Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$			%
Research and development	$	56,872	17	%	$	50,951	18	%	$	5,921		12	%
Sales and marketing	104,304		31		96,184		34	%	8,120			8	%
General and administrative	33,211		10		22,367		8	%	10,844			48	%
Amortization of acquired intangible assets	2,539		1		2,571		1	%	(32		)	(1	)%
Total operating expenses	$	196,926	59	%	$	172,073	61	%	$	24,853		14	%

Research and development. The 12%, or $5.9 million, increase in research and development expenses is due to a $5.0 million increase in employee related expenses due to increased headcount as well as increased compensation related items. In addition, there was an $835 thousand increase in depreciation expense, an $816 thousand increase in consulting expenses, and a $486 thousand increase in allocated overhead. These expenses were offset by a $590 thousand decrease in non-recurring engineering expenses, a $106 thousand decrease in computer supplies and a $74 thousand decrease in deal related compensation related to the acquisition of Replay. Average headcount in research and development was 358 and 353 for the nine months ended December 31, 2014 and 2013, respectively.

Sales and marketing. The 8%, or $8.1 million, increase in total sales and marketing expenses was due to a $5.3 million increase in employee related expenses as a result of increased headcount and other employee related costs, a $956 thousand increase in allocated overhead, a $710 thousand increase in sales meeting costs, a $645 thousand increase in travel expenses, a $611 thousand increase in commissions due to higher shipments during the nine months ended December 31, 2014 compared to the nine months ended December 31, 2013. In addition, there was a $431 thousand increase in recruitment expenses, a $257 thousand increase in consulting expenses, and a $216 thousand increase in trade show expenses. These expenses were partially offset by a $673 thousand decrease in depreciation expense. Average headcount in sales and marketing was 373 and 355 for the nine months ended December 31, 2014 and 2013, respectively.

General and administrative. The 48%, or $10.8 million, increase in general and administrative expenses was due to a $5.7 million increase in business development expenses, a $3.3 million increase in employee related expenses as a result of compensation related items and other employee related costs, a $1.0 million increase in legal expenses, a $636 thousand increase in consulting expenses, and a $224 thousand increase in depreciation expense. These increases were partially offset by a $223 thousand decrease in bad debt expense. Average headcount in general and administrative was 121 and 119 for the nine months ended December 31, 2014 and 2013, respectively.

Amortization of acquired intangible assets. Amortization of acquired intangible assets consists primarily of amortization of customer relationships related to the acquisitions of ONPATH, Accanto, Simena, Replay, Psytechnics and Network General.

Interest and Other Expense, Net. Interest and other (expense) income, net includes interest earned on our cash, cash equivalents and marketable securities, interest expense and other non-operating gains or losses.

	Nine Months Ended								Change
	December 31,
	(Dollars in Thousands)
	2014				2013
			% of Revenue				% of Revenue		$			%
Interest and other expense, net	(1,186	)	—	%	(88	)	—	%	$	(1,098	)	(1,248	)%

The $1.1 million, increase in interest and other expense was due to a $1.1 million increase in foreign currency exchange expense, and a $173 thousand increase in loss on disposal of equipment. This increase to interest and other expense, net was partially offset by a $106 thousand increase in other income and an $88 thousand increase in interest income received on investments.

26

Income Tax Expense. Our effective income tax rates were 37.9% and 37.6% for the nine months ended December 31, 2014 and 2013, respectively. Generally, the effective tax rates differ from statutory rates due to the impact of the domestic production activities deduction, the impact of state taxes, and federal, foreign and state tax credits.At this time,the effective tax rate for the nine months ended December 31, 2014 is higher than the comparable prior year period primarily due to an increase in certain foreign losses for which a benefit cannot be realized.

	Nine Months Ended						Change
	December 31,
	(Dollars in Thousands)
	2014			2013
		% of Revenue			% of Revenue		$		%
Income tax expense	24,661	7	%	19,511	7	%	$	5,150	26	%

Off-Balance Sheet Arrangements

At December 31, 2014 and 2013, we did not have any off-balance sheet arrangements as defined in Regulation S-K, Item 303(a)(4)(ii).

Commitment and Contingencies

We account for claims and contingencies in accordance with authoritative guidance that requires us to record an estimated loss from a claim or loss contingency when information available prior to issuance of our consolidated financial statements indicates that it is probable that a liability has been incurred at the date of the consolidated financial statements and the amount of the loss can be reasonably estimated. If we determine that it is reasonably possible but not probable that an asset has been impaired or a liability has been incurred or if the amount of a probable loss cannot be reasonably estimated, then in accordance with the authoritative guidance, we disclose the amount or range of estimated loss if the amount or range of estimated loss is material. Accounting for claims and contingencies requires us to use our judgment. We consult with legal counsel on those issues related to litigation and seek input from other experts and advisors with respect to matters in the ordinary course of business. For additional information with respect to legal proceedings, refer to Part II, Item 1 “Legal Proceedings.”

We recorded two contingent liabilities related to the acquisition of Simena. One relates to future consideration to be paid to the former owner which had an initial fair value of $8.0 million at the time of acquisition and another relates to contractual non-compliance liabilities incurred by Simena with an initial fair value of $1.6 million at the time of acquisition. At December 31, 2014, the present value of the future consideration was $4.4 million and the contractual non-compliance liability was $0. The contingent contractual obligation has been reduced to zero as NetScout has either settled those liabilities or believes that because of the passage of time that the probability of a future negative settlement is essentially zero.

Liquidity and Capital Resources

Cash, cash equivalents and marketable securities consist of the following (in thousands):

	December 31, 2014		March 31, 2014
Cash and cash equivalents	$	106,704	$	102,076
Short-term marketable securities	87,967		75,234
Long-term marketable securities	46,055		41,484
Cash, cash equivalents and marketable securities	$	240,726	$	218,794

Cash, cash equivalents and marketable securities

At December 31, 2014, cash, cash equivalents and marketable securities totaled $240.7 million, up$21.9 million from $218.8 million at March 31, 2014 due primarily to cash flow from operations of $57.3 million and $4.3 million generated from excess tax benefits from share-based compensation awards, partially offset by $31.5 million of cash used to repurchase shares of our common stock and $8.6 million of cash used for capital expenditures.

27

Substantially all of our cash, cash equivalents and marketable securities are located in the United States. At December 31, 2014, cash and short-term and long-term investments in the United States was $238.6 million, while cash held outside the United States was approximately $2.1 million.

Cash and cash equivalents were impacted by the following:

	Nine months ended December 31,
	(Dollars in Thousands)
	2014			2013
Net cash provided by operating activities	$	57,322		$	60,767
Net cash used in investing activities	$	(26,016	)	$	(48,782	)
Net cash used in financing activities	$	(27,116	)	$	(23,080	)

Net cash provided by operating activities

Cash provided by operating activities was $57.3 million during the nine months ended December 31, 2014, compared to $60.8 million of cash provided by operating activities during the nine months ended December 31, 2013. This $3.5 million decrease was due in part to a $22.7 million unfavorable impact from accounts receivable in the nine months ended December 31, 2014 as compared to the nine months ended December 31, 2013. Days sales outstanding was 62 days at December 31, 2014 compared to 47 days at March 31, 2014 and 61 days at December 31, 2013. In addition, there was a $2.4 million decrease from deferred revenue, a $2.1 million decrease from deferred income taxes, a $1.5 million decrease from prepaid expenses and other assets, and a $1.4 million decrease from income taxes payable. These decreases were offset by a $7.9 million increase from net income and a $7.9 million increase from accrued compensation and other expenses. This was due largely to the timing of accruals and payments for compensation related items, as well as increased accruals for legal and accounting related fees. There was also a $6.7 million increase from inventories related to a buildup of the inventory balance during the nine months ended December 31, 2013 as compared to the nine months ended December 31, 2014, a $2.0 million increase from share based compensation expense, a $675 thousand increase from depreciation and amortization, and a $555 thousand increase from accounts payable due to timing of payments.

Net cash used in investing activities

	Nine months ended December 31,
	(Dollars in Thousands)
	2014			2013
Cash used in investing activities included the following:
Purchase of marketable securities	$	(78,547	)	$	(88,802	)
Proceeds from maturity of marketable securities	61,189			49,405
Purchase of fixed assets	(8,630		)	(8,709		)
Purchase of intangible assets	(131		)	(713		)
Decrease in deposits	103			37
	$	(26,016	)	$	(48,782	)

Cash used in investing activities was down$22.8 million to $26.0 million during the nine months ended December 31, 2014, compared to $48.8 million of cash used in investing activities in the nine months ended December 31, 2013.

Our investments in property and equipment consist primarily of computer equipment, demonstration units, office equipment and facility improvements. We plan to continue to invest in capital expenditures to support our infrastructure through the remainder of fiscal year 2015.

The overall decrease in cash outflow related to a net decrease in the purchase of investments of $22.0 million during the nine months ended December 31, 2014 when compared to the nine months ended December 31, 2013.

28

Net cash used in financing activities

	Nine months ended December 31,
	(Dollars in Thousands)
	2014			2013
Cash used in financing activities included the following:
Issuance of common stock under stock plans	$	105		$	755
Payment of contingent consideration	—			(841		)
Treasury stock repurchases	(31,543		)	(25,033		)
Excess tax benefit from share-based compensation awards	4,322			2,039
	$	(27,116	)	$	(23,080	)

Cash used in financing activities was up$4.0 million to $27.1 million during the nine months ended December 31, 2014, compared to $23.1 million of cash used in financing activities in the nine months ended December 31, 2013.

During the nine months ended December 31, 2013, we paid $0.8 million related to the contingent purchase consideration for the acquisition of Simena. For additional information with respect to the contingent purchase consideration, see Note 11 in the Notes to the Consolidated Financial Statements of this Form 10-Q.

On September 17, 2001, we announced an open market stock repurchase program to purchase up to one million shares of our outstanding common stock, subject to market conditions and other factors. Any purchases under this stock repurchase program may be made from time to time without prior notice. On July 26, 2006, we announced that we had expanded the existing open market stock repurchase program to enable us to purchase up to an additional three million shares of our outstanding common stock, bringing the total number of shares authorized for repurchase to four million shares. Through June 30, 2014, we had repurchased a total of 4,000,000 shares of common stock through the open market stock repurchase program. We repurchased 243,300 and 475,407 shares at a cost of $9.4 million and $11.7 million under this program during the nine months ended December 31, 2014 and 2013, respectively. At June 30, 2014, all authorized shares under this stock repurchase program have been repurchased.

On April 22, 2014, our board of directors approved an additional stock repurchase program. This program authorizes management to make additional repurchases of our outstanding common stock of up to $100 million. The share repurchase authorization does not have an expiration date and the pace and timing of repurchases will depend on factors such as cash generation from operations, cash requirements for acquisitions, economic and market conditions, stock price and legal and regulatory requirements. We did not repurchase any stock during the three months ending December 31, 2014. Through December 31, 2014, we repurchased 256,700 shares totaling $11.5 million in the open market under this stock repurchase plan. At December 31, 2014, $88.5 million of common stock remained to be purchased under the plan.

Future repurchases of shares will reduce our cash balance. In addition, during the nine months ended December 31, 2014 and 2013, we had 243,063 and 209,756 shares transferred to us from employees for tax withholding at a cost of $10.6 million and $5.3 million, respectively.

We generated $4.3 million and $2.0 million during the nine months ended December 31, 2014 and 2013, respectively, of excess tax benefits from share-based compensation awards.

Credit Facility

On November 22, 2011, we entered into a credit facility with a syndicate of lenders led by KeyBank National Association (KeyBank) which provides us with a $250 million revolving credit facility, which may be increased to $300 million at any time up to 90 days before maturity. The revolving credit facility includes a swing line loan sub-facility of up to $10 million and a letter of credit sub-facility of up to $10 million. The credit facility matures on November 21, 2016 and is secured by substantially all of our assets. At December 31, 2014, there were no amounts outstanding under the credit facility.

Expectations for Fiscal Year 2015

We believe that our cash balances, short-term marketable securities classified as available-for-sale and future cash flows generated by operations will be sufficient to meet our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. In addition, we expect that cash provided by operating activities will continue to increase due to an expected increase in cash collections related to anticipated higher revenues, partially offset by an anticipated increase in operating expenses that require cash outlays such as salaries and commissions. Capital expenditures in our fiscal year 2015 are currently anticipated to be in line with previous years’ amounts.

29

Additionally, a portion of our cash may be used to acquire or invest in complementary businesses or products or to obtain the right to use complementary technologies. From time to time, in the ordinary course of business, we evaluate potential acquisitions of such businesses, products or technologies. If our existing sources of liquidity are insufficient to satisfy our liquidity requirements, we may seek to sell additional equity or debt securities. The sale of additional equity or debt securities could result in additional dilution to our stockholders.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers: Topic 606 (ASU 2014-09), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for us in our first quarter of fiscal year 2018 using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU 2014-09; or (ii) retrospective with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU 2014-09. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements.

30

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

Credit Risk. Our cash equivalents and marketable securities consist primarily of money market instruments, U.S. Treasury bills, certificates of deposit, commercial paper, corporate bonds and municipal obligations.

At December 31, 2014, we maintained cash balances in various operating accounts in excess of federally insured limits. We limit the amount of credit exposure with any one financial institution by evaluating the creditworthiness of the financial institutions with which we invest.

Foreign Currency Exchange Risk. As a result of our foreign operations, we face exposure to movements in foreign currency exchange rates, primarily the Euro, British Pound, Canadian Dollar and Indian Rupee. The current exposures arise primarily from expenses denominated in foreign currencies. We currently engage in foreign currency hedging activities in order to limit these exposures. We do not use derivative financial instruments for speculative trading purposes.

As of December 31, 2014, we had foreign currency forward contracts with notional amounts totaling $19.8 million. The valuation of outstanding foreign currency forward contracts at December 31, 2014 resulted in an asset balance of $16 thousand, reflecting favorable rates in comparison to current market rates and a liability balance of $1.2 million, reflecting unfavorable contract rates in comparison to current market rates at this date. As of March 31, 2014, we had foreign currency forward contracts with notional amounts totaling $17.5 million. The valuation of outstanding foreign currency forward contracts at March 31, 2014 resulted in a liability balance of $139 thousand, reflecting unfavorable contract rates in comparison to current market rates at this date and an asset balance of $368 thousand reflecting favorable rates in comparison to current market rates.

Item 4.  Controls and Procedures

At December 31, 2014, NetScout, under the supervision and with the participation of our management, including the Company's principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) promulgated under the Securities Exchange Act of 1934, as amended (Exchange Act). Based upon that evaluation, our principal executive officer and principal financial officer concluded that, at December 31, 2014, our disclosure controls and procedures were effective in ensuring that material information relating to NetScout, including its consolidated subsidiaries, required to be disclosed by NetScout in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, including ensuring that such material information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

There were no changes in our internal controls that occurred during our last fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

31

PART II: OTHER INFORMATION

Item 1.  Legal Proceedings

From time to time, NetScout is subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a significant adverse effect on our financial condition, results of operations or cash flows.

Item 1A.  Risk Factors

In addition to the other information set forth in this report, you should carefully consider the factors discussed in Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for our fiscal year ended March 31, 2014, the risk factors set forth under the caption “Risk Factors” in our preliminary proxy statement on Schedule 14A filed with the Commission on January 9, 2015 (which are incorporated herein by reference and filed as Exhibit 99.1 to this Form 10-Q), and the risk factors listed below. The risks discussed in our Annual Report on Form 10-K, in the preliminary proxy statement, and below could materially affect our business, financial condition and future results. The risks described in our Annual Report on Form 10-K, in the preliminary proxy statement, and below are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition or operating results.

The announcement and pendency of the proposed acquisition of the Communications Business could have an adverse effect on our stock price, business, financial condition, results of operations or business prospects.

 The announcement and pendency of the transaction could disrupt our business in the following ways, among others:

 ·Our customers, channel partners and other third-party business partners may delay or defer purchase decisions with regard to our products and services or may seek to terminate and/or renegotiate their relationships with us as a result of the transaction, whether pursuant to the terms of their existing agreements with us or otherwise; and

 ·Current and prospective employees may experience uncertainty regarding their future roles with the combined company, which might adversely affect our ability to retain, recruit and motivate key personnel and may adversely affect the focus of our employees on our sales efforts.

 Should they occur, any of these matters could adversely affect our stock price or harm our financial condition, results of operations or business prospects.

Failure to complete the proposed acquisition of the Communications Business could negatively impact our business, financial condition, results of operations or stock price.

 Completion of the transaction is conditioned upon NetScout and Danaher satisfying certain closing conditions, including the approval of the shares to be issued in connection with the transaction by our stockholders, as set forth in the merger agreement. The required conditions to closing may not be satisfied in a timely manner, if at all, or, if permissible, waived. If the transaction is not consummated for these or any other reasons, our ongoing business may be adversely affected and will be subject to a number of risks including:

 ·The market price of our common stock may decline to the extent that the current market price reflects a market assumption that the transaction will be completed;

 ·We may experience negative reactions to the termination of the transaction from customers, channel partners, suppliers, strategic partners, investors or analysts;

 ·We would not realize any of the anticipated benefits of having completed the transaction;

32

 ·We may be required to pay a termination fee of $55.0 million to Danaher if the Merger Agreement is terminated under certain circumstances; and

 ·Our expenses incurred related to the transaction, such as legal and accounting fees, must be paid even if the transaction is not completed and may not, except in certain circumstances, be recovered from Danaher.

 In addition, any delay in the consummation of the transaction or, any uncertainty about the consummation of the transaction, may adversely affect our future business, growth, revenue and results of operations.

The market price of our common stock may decline as a result of the acquisition of the Communications Business.

 The market price of our common stock may decline as a result of the transaction for a number of reasons including if:

 ·We do not achieve the perceived benefits of the transaction as rapidly or to the extent anticipated;

 ·The effect of the transaction on our business and prospects is not consistent with the expectations of financial or industry analysts; or

 ·Investors react negatively to the effect of the transaction on our business and prospects.

NetScout and Danaher may be unable to satisfy the conditions or obtain the approvals required to complete the Mergers or such approvals may contain material restrictions or conditions.

The consummation of the Mergers is subject to numerous conditions including (i) consummation of certain transactions contemplated by the Merger Agreement and the Distribution Agreement (such as the separation of the Communications Business from Danaher’s other business) and (ii) the receipt of certain regulatory approvals without imposing a condition (other than as specifically set forth in the Distribution Agreement or any ancillary agreement) on any of NetScout, Danaher, Merger Sub or Newco to divest or agree to divest (or cause any of its subsidiaries to divest or agree to divest) any of its respective material businesses, material product lines or material assets, or to take or agree to take (or cause any of its subsidiaries to take or agree to take) any other material action or agree (or cause any of its subsidiaries to agree) to any material limitation or material restriction on any of its respective material businesses, material product lines or material assets, except as would not, or as would not reasonably be expected to, involve the divestiture of assets that generated in the aggregate more than 10% of the combined gross revenues of the Newco and its subsidiaries and NetScout and each of its subsidiaries, including Merger Sub and Merger Sub II, for the 12 months ending June 27, 2014 (a “Burdensome Condition”). We cannot make any assurances that the Mergers and related transactions will be consummated on the terms or timeline currently contemplated, or at all. Each of Danaher and NetScout has and will continue to expend time and resources and incur expenses related to the proposed transaction.

On December 24, 2014, we received a request for additional information (“second request”) from the Department of Justice (“DOJ”) in connection with the proposed acquisition of the Communications business. The second request was issued under notification requirements of the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (“HSR Act”). The effect of the second request is to extend the waiting period imposed by the HSR Act until 30 days after both NetScout and Danaher have substantially complied with the request, unless that period is extended voluntarily by the parties or terminated sooner by the DOJ. The DOJ may not approve the Mergers or the related transactions necessary to complete the Mergers or may impose conditions to the approval of such transactions or require changes to the terms of such transactions. Any such conditions or changes could have the effect of delaying completion of the Mergers, imposing costs on or limiting the revenues of the combined company following the Mergers or otherwise reducing the anticipated benefits of the Mergers. Any condition or change which results in a Burdensome Condition on the Communications Business and/or NetScout under the Merger Agreement might cause Danaher and/or NetScout to restructure or terminate the Mergers or the related transactions, or could have a material adverse effect on the anticipated benefits of the transaction.

33

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

The following table provides information about purchases we made during the quarter ended December 31, 2014 of equity securities that are registered by us pursuant to Section 12 of the Exchange Act:

Period	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares That May Yet be Purchased Under the Program
10/1/2014 - 10/31/2014	14,982	$	40.91	—
11/1/2014 - 11/30/2014	1,555	46.14		—
12/1/2014 - 12/31/2014	—	—		—
Total	16,537	$	41.40	—	$	88,521,377

(1) We purchased an aggregate of 16,537 shares transferred to us from employees in satisfaction of minimum tax withholding obligations associated with the vesting of restricted stock units during the period. These purchases reflected in the table do not reduce the maximum number of shares that may be purchased under the plan.

34

Item 6. Exhibits

(a) Exhibits

10.1		Form of Employee Matters Agreement (filed as Exhibit10.1 to NetScout’s Registration Statement on Form S-4, SEC File No. 333-200704, filed on December 3, 2014 and incorporated herein by reference).
10.2		Form of Tax Matters Agreement (filed as Exhibit10.2 to NetScout’s Registration Statement on Form S-4, SEC File No. 333-200704, filed on December 3, 2014 and incorporated herein by reference).
10.3		Form of Transition Services Agreement (filed as Exhibit 10.4 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.4		Form of Trademark License Agreement (filed as Exhibit 10.5 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.5		Form of DBS License Agreement (filed as Exhibit 10.6 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.6		Form of IP License Agreement (filed as Exhibit 10.7 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.7		Form of Lease Agreement (filed as Exhibit 10.8 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.8	+	Summary of Non-Employee Director Compensation.
10.9	+	Form of Amendment to Amended and Restated Severance Agreement for Executive Officers.
31.1	+	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	+	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	++	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	++	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
99.1	+	Risk factors.
101.INS	**	XBRL Instance Document.
101.SCH	**	XBRL Taxonomy Extension Schema Document.
101.CAL	**	XBRL Taxonomy Extension Calculation Linkbase document.
101.DEF	**	XBRL Taxonomy Extension Definition Linkbase document.
101.LAB	**	XBRL Taxonomy Extension Label Linkbase document.
101.PRE	**	XBRL Taxonomy Extension Presentation Linkbase document.

+	Filed herewith.
++	Furnished herewith.
**	XBRL (Extensible Business Reporting Language) information is furnished and not filed or a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, as amended, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, as amended, and otherwise is not subject to liability under these sections.

35

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	NETSCOUT SYSTEMS, INC.
Date: January 27, 2015	/s/ Anil K. Singhal
	Anil K. Singhal
	President, Chief Executive Officer and Chairman
	(Principal Executive Officer)
Date: January 27, 2015	/s/ Jean Bua
	Jean Bua
	Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)
	(Principal Accounting Officer)

36

EXHIBIT INDEX

Exhibit No.		Description
10.1		Form of Employee Matters Agreement (filed as Exhibit10.1 to NetScout’s Registration Statement on Form S-4, SEC File No. 333-200704, filed on December 3, 2014 and incorporated herein by reference).
10.2		Form of Tax Matters Agreement (filed as Exhibit10.2 to NetScout’s Registration Statement on Form S-4, SEC File No. 333-200704, filed on December 3, 2014 and incorporated herein by reference).
10.3		Form of Transition Services Agreement (filed as Exhibit 10.4 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.4		Form of Trademark License Agreement (filed as Exhibit 10.5 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.5		Form of DBS License Agreement (filed as Exhibit 10.6 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.6		Form of IP License Agreement (filed as Exhibit 10.7 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.7		Form of Lease Agreement (filed as Exhibit 10.8 to NetScout’s Amendment No. 1 to Registration Statement on Form S-4, SEC File No. 333-200704, filed on January 9, 2015 and incorporated herein by reference).
10.8	+	Summary of Non-Employee Director Compensation.
10.9	+	Form of Amendment to Amended and Restated Severance Agreement for Executive Officers.
31.1	+	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	+	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	++	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	++	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
99.1	+	Risk factors.
101.INS	**	XBRL Instance Document.
101.SCH	**	XBRL Taxonomy Extension Schema Document.
101.CAL	**	XBRL Taxonomy Extension Calculation Linkbase document.
101.DEF	**	XBRL Taxonomy Extension Definition Linkbase document.
101.LAB	**	XBRL Taxonomy Extension Label Linkbase document.
101.PRE	**	XBRL Taxonomy Extension Presentation Linkbase document.

+	Filed herewith.
++	Furnished herewith.
**	XBRL (Extensible Business Reporting Language) information is furnished and not filed or a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, as amended, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, as amended, and otherwise is not subject to liability under these sections.

37

EX-10.8

Exhibit 10.8

NetScout Systems, Inc.

Summary of Non-Employee Director Compensation

Effective as of November 2014, non-employee directors are compensated $36,000 annually for their services and do not receive any additional compensation for any regular Board meeting attended. The lead non-employee director receives an additional annual retainer of $30,000. Non-employee directors currently receive $10,000 annually for serving on the Audit Committee, $8,000 annually for serving on the Compensation Committee, and $6,000 annually for serving on the Nominating Committee. In addition, directors who are chairpersons of a particular committee are also given additional annual compensation of $20,000 for the Audit Committee, and $10,000 for the Compensation Committee, and $8,000 for the Nominating Committee and $6,000 for the Finance Committee. Finance Committee members receive $1,000 for each meeting attended in person and $800 for each meeting attended via telephone. Non-employee directors are also reimbursed for their reasonable out-of-pocket expenses incurred in attending meetings of the Board or of any committee and for attendance at approved director education programs.

Non-employee directors are granted annually equity-based awards in the form of restricted stock units and related cash amounts upon vesting to defray the corresponding tax liability as follows:

Element	Role/Position
	Lead Director		Chairperson		Other Directors
Total value (RSU Grant and Cash Offset)	$	212,000	$	159,000	$	132,500
RSU Grant	$	132,000	$	99,000	$	82,500
Cash Offset	$	80,000	$	60,000	$	50,000

These restricted stock unit awards vest 100% on the date of our annual meeting provided that during such year, such director attends at least 75%, collectively, of the meetings of the Board and any committee of the Board of which such director is a member. In the event that the foregoing attendance requirements are not met, then 100% of these restricted stock units will vest on the third anniversary of the date of grant. No other equity awards are given to our non-employee directors.

EX-10.9

Exhibit 10.9

FORM OF AMENDMENT TO AMENDED AND RESTATED SEVERANCE AGREEMENT

FOR EXECUTIVE OFFICERS

THIS AMENDMENT TO AMENDED AND RESTATED SEVERANCE AGREEMENT, dated effective as of [_____] (the “Amendment”), is made by and between NetScout Systems, Inc. (the “Company”), and [Name] (the “Executive”) residing at [Address].

WHEREAS, the Company and the Executive are party to an Amended and Restated Severance Agreement (the “Severance Agreement”); and

WHEREAS, the Company and the Executive desire to clarify that the effectuation of the transactions contemplated by that certain Agreement and Plan of Merger and Reorganization, dated as of October 12, 2014, as may be amended from time to time, by and between the Company, Danaher Corporation, Potomac Holding LLC, RS Merger Sub I, Inc., and RS Merger Sub II, LLC (the “Merger Agreement”) do not constitute a Change in Control for purposes of the Severance Agreement;

THEREFORE, in consideration of the foregoing and other respective covenants and agreements of the parties herein contained, the parties hereto agree that the Severance Agreement is hereby amended as follows:

1.Defined Terms. The definition of “Change in Control” set forth in the Severance Agreement is hereby amended to add the additional following paragraph at the end of such defintion:

“Notwithstanding anything in the foregoing to the contrary, no Change in Control shall be deemed to have occurred for purposes of this Agreement as a result of the transactions contemplated by that certain Agreement and Plan of Merger and Reorganization, dated as of October 12, 2014, as may be amended from time to time, by and between the Company, Danaher Corporation, Potomac Holding LLC, RS Merger Sub I, Inc., and RS Merger Sub II, LLC.”

2. Assignment. This Amendment and the Severance Agreement and the rights and obligations of the parties hereto shall bind and inure to the benefit of any successor of the Company by reorganization, merger or consolidation and any assignee of all or substantially all of its business and properties. Neither the Severance Agreement, as amended by this Amendment, nor any rights or benefits hereunder or thereunder may be assigned by the Executive, except that, upon the Executive’s death, the Executive’s earned and unpaid economic benefits will be paid to the Executive’s heirs or beneficiaries.

3. Governing Law; Arbitration. The validity, interpretation, construction and performance of this Agreement shall be governed by the laws of the Commonwealth of Massachusetts, without regard to its conflict of laws provisions. Any dispute or controversy arising under or in connection with this Agreement shall be settled exclusively by arbitration in Boston, Massachusetts in accordance with the rules of the American Arbitration Association then in effect. Judgment may be entered on the arbitrator’s award in any court having jurisdiction.

4. Miscellaneous. No provision of this Amendment may be modified, waived or discharged unless such waiver, modification or discharge is agreed to in writing and signed by the Executive and the Chief Executive Officer of the Company. No waiver by either party hereto at any time of any breach by the other party hereto of, or of any lack of compliance with, any condition or provision of this Amendment to be performed by such other party shall be deemed a waiver of similar or dissimilar provisions or conditions at the same or at any prior or subsequent time. This Amendment supersedes and is in lieu of any other agreements or representations, oral or otherwise, express or implied, with respect to the subject matter hereof (including any severance agreement by and between the Company and the Executive) which have been made by either party. The invalidity or unenforceability of any provision of this Amendment shall not affect the validity or enforceability of any other provision of this Amendment, which shall remain in full force and effect.

5. Counterparts. This Amendment may be executed in several counterparts, each of which shall be deemed to be an original but all of which together will constitute one and the same instrument.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, the Company and the Executive have signed this Agreement as of the date first above written.

NETSCOUT SYSTEMS, INC.

By: ______________________

Name:

Title:

EXECUTIVE:

____________________________

[Signature]

____________________________

[Print Name]

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Anil K. Singhal, certify that:

1. I have reviewed this quarterly report on Form 10-Q of NetScout Systems, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 27, 2015

/s/ Anil K. Singhal

Anil K. Singhal

President, Chief Executive Officer and Chairman

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Jean Bua, certify that:

1. I have reviewed this quarterly report on Form 10-Q of NetScout Systems, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 27, 2015

/s/ Jean Bua

Jean Bua

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

(Principal Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NetScout Systems, Inc. (the “Company”) on Form 10-Q for the period ending December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anil K. Singhal, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Anil K. Singhal

Anil K. Singhal

President, Chief Executive Officer and Chairman

January 27, 2015

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Netscout Systems, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NetScout Systems, Inc. (the “Company”) on Form 10-Q for the period ending December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jean Bua, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Jean Bua

Jean Bua

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

(Principal Accounting Officer)

January 27, 2015

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Netscout Systems, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

EX-99.1

Exhibit 99.1

RISK FACTORS

You should carefully consider the following risks, together with the other information contained or incorporated by reference in this document and the annexes hereto. Some of the risks described below relate principally to the business and the industry in which NetScout, including the Communications Business, will operate after the Transactions, while others relate principally to the Transactions. The remaining risks relate principally to the securities markets generally and ownership of shares of NetScout common stock. For a discussion of additional uncertainties associated with forward-looking statements in this document, please see the section entitled “Cautionary Statement Concerning Forward-Looking Statements.” In addition, you should consider the risks associated with NetScout’s business that appear in NetScout’s Annual Report on Form 10-K for the year ended March 31, 2014 and NetScout’s Quarterly Report on Form 10-Q for the period ended September 30, 2014, which are incorporated by reference into this document.

Risks Related to the Transactions

The calculation of the merger consideration will not be adjusted if the value of the business or assets of the Communications Business declines or if the value of NetScout increases before the Mergers are completed.

The calculation of the number of shares of NetScout common stock to be distributed in the Mergers will not be adjusted if the value of the business or assets of the Communications Business declines prior to the consummation of the Mergers or the value of NetScout increases prior to the Mergers. NetScout will not be required to consummate the Mergers if there has been any “material adverse effect” (as this term is described in the section of this document entitled “The Merger Agreement—Representations and Warranties”) on the Communications Business. However, NetScout will not be permitted to terminate the Merger Agreement or resolicit the vote of NetScout stockholders because of any changes in the market prices of NetScout’s common stock or any changes in the value of the Communications Business that do not constitute a material adverse effect on the Communications Business.

Upon completion of the Transactions, NetScout will incur significant expenses in connection with the integration of the Communications Business.

Upon completion of the Transactions, NetScout expects to incur significant expenses in connection with the integration of the Communications Business, including integrating products and technology, personnel, information technology systems, accounting systems, suppliers, and channel partners of each business and implementing consistent standards, policies, and procedures, and may possibly be subject to material write downs in assets and charges to earnings, which may include severance pay and other costs.

NetScout will assume certain non-U.S. pension benefit obligations associated with the Communications Business. Future funding obligations related to these liabilities could restrict cash available for NetScout’s operations, capital expenditures or other requirements, or require NetScout to borrow additional funds.

In the Transactions, NetScout will assume certain funded and unfunded non-U.S. pension obligations related to non-U.S. employees of the Communications Business who become employees of Newco to the extent the assumption is required by applicable law. In connection therewith, Danaher will transfer to NetScout all assets set aside by Danaher to fund such non-U.S. pension obligations related to the Communications Business. If the non-U.S. pension liabilities transferred by Danaher exceed the assets transferred by Danaher, Danaher is obligated to transfer an amount of cash to NetScout equal to the difference between the non-U.S. pension liabilities transferred and the assets transferred. The transfers of assets and non-U.S. pension liabilities will be governed by applicable law, provided that if the mechanism for the transfers is not mandated by applicable law, the assets and liabilities will be transferred on a projected benefit obligation basis in accordance with GAAP.

Funding obligations with respect to non-U.S. pension plans change due to, among other things, the actual investment return on plan assets. Continued volatility in the capital markets may have a further negative impact on the funded status of the non-U.S. pension plans, which may in turn increase attendant funding obligations. Changing economic conditions, poor pension investment returns or other factors may require NetScout to make substantial cash contributions to the pension plans in the future, preventing the use of increased cash contributions for other purposes and adversely affecting NetScout’s liquidity.

While NetScout intends to comply with any future funding obligations for its non-U.S. pension benefit plans through the use of cash from operations, there can be no assurance that NetScout will generate enough cash to do so and also meet its other required or intended cash uses. NetScout’s inability to fund these obligations through cash from operations could require it to seek funding from other sources, including through additional borrowings, which could materially increase NetScout’s outstanding debt or debt service requirements.

Current NetScout stockholders’ ownership interest in NetScout will be substantially diluted in the Mergers.

Following the consummation of the Mergers, NetScout’s stockholders will, in the aggregate, own a significantly smaller percentage of NetScout than they will own of NetScout immediately prior to the Mergers. Following the consummation of the Mergers, NetScout’s stockholders immediately prior to the Mergers are expected to collectively hold no more than approximately 40.5% of NetScout’s common stock immediately after the Mergers. Consequently, NetScout’s current stockholders, as a group, will be able to exercise less influence over the management and policies of NetScout following the Mergers than they will exercise over the management and policies of NetScout immediately prior to the Mergers.

Sales of NetScout common stock after the Transactions may negatively affect the market price of NetScout common stock.

The shares of NetScout common stock to be issued in the Transactions to holders of Newco common units will generally be eligible for immediate resale. The market price of NetScout common stock could decline as a result of sales of a large number of shares of NetScout common stock in the market after the consummation of the Transactions or even the perception that these sales could occur.

It is expected that immediately after consummation of the First Merger, pre-First Merger holders of Newco common units will hold approximately 59.5% of NetScout’s common stock on a fully-diluted basis and NetScout’s existing stockholders will hold approximately 40.5% of NetScout’s common stock on a fully-diluted basis, subject to potential adjustment under limited circumstances as described in the section of this document entitled “The Merger Agreement—Merger Consideration.” Currently, Danaher stockholders may include index funds that have performance tied to certain stock indices, and institutional investors subject to various investing guidelines. Because NetScout may not be included in these indices following the consummation of the Transactions or may not meet the investing guidelines of some of these institutional investors, these index funds and institutional investors may decide to or may be required to sell the NetScout common stock that they receive in the Transactions. In addition, the investment fiduciaries of Danaher’s defined contribution and defined benefit plans may decide to sell any NetScout common stock that the trusts for these plans receive in the Transactions, or may decide not to participate in the exchange offer, if applicable, in response to their fiduciary obligations under applicable law. These sales, or the possibility that these sales may occur, may also make it more difficult for NetScout to obtain additional capital by selling equity securities in the future at a time and at a price that it deems appropriate.

The historical financial information of the Communications Business may not be representative of its results or financial condition if it had been operated independently of Danaher and, as a result, may not be a reliable indicator of its future results.

The Communications Business is currently operated by Danaher. Consequently, the financial information of the Communications Business included in this document has been derived from the consolidated financial statements and accounting records of the Communications Business and reflects all direct costs as well as assumptions and allocations made by management of Danaher. The financial position, results of operations and cash

flows of the Communications Business presented may be different from those that would have resulted had the Communications Business been operated independently of Danaher during the applicable periods or at the applicable dates. For example, in preparing the financial statements of the Communications Business, Danaher made allocations of costs and Danaher corporate expenses deemed to be attributable to the Communications Business. However, these costs and expenses reflect the costs and expenses attributable to the Communications Business operated as part of a larger organization and do not necessarily reflect costs and expenses that would be incurred by the Communications Business had it been operated independently. As a result, the historical financial information of the Communications Business may not be a reliable indicator of future results.

NetScout’s business, financial condition and results of operations may be adversely affected following the Transactions if NetScout cannot negotiate terms that are as favorable as those Danaher has received when NetScout replaces contracts after the closing of the Transactions.

Prior to consummation of the Transactions, certain functions (such as purchasing, information systems, sales, logistics and distribution) for the Communications Business are generally being performed under centralized systems that will not be transferred to NetScout and, in some cases, under contracts that are also used for Danaher’s other businesses and which are not intended to be assigned to NetScout with the Communications Business. In addition, some other contracts that Danaher or its subsidiaries are a party to on behalf of the Communications Business require consents of third parties to assign them to Newco. While Danaher, under the Transition Services Agreement, will agree to provide NetScout with certain services, there can be no assurance that NetScout will be able to obtain those consents or negotiate terms that are as favorable as those Danaher received when and if NetScout replaces these services with its own agreements for similar services. Although NetScout believes that it will be able to obtain any such consents or enter into new agreements for similar services, it is possible that the failure to obtain consents for or replace a significant number of these agreements for any of these services or to replace them on terms that as are as favorable as those Danaher has received could have a material adverse impact on NetScout’s business, financial condition and results of operations following the Transactions.

The Distribution could result in significant tax liability, and NetScout may be obligated to indemnify Danaher for any such tax liability imposed on Danaher.

Danaher will receive the Tax Opinion from Skadden to the effect that the Distribution offer will qualify as a tax-free transaction under Sections 355 and 368(a)(1)(D) of the Code and that the Mergers will qualify as a tax-free transaction under Section 368(a)(1)(A) of the Code. Assuming that the Distribution and the Mergers so qualify, for U.S. federal income tax purposes, no gain or loss will be recognized by a holder of Danaher common stock upon the receipt of Newco common units in the Distribution or upon the exchange of Newco common units for NetScout common stock pursuant to the First Merger other than with respect to cash received in lieu of fractional shares, and Danaher will not recognize gain or loss with respect to the transfer of Newco units pursuant to the Distribution. Danaher also intends to seek a ruling from the IRS regarding certain issues relevant to the qualification of the Distribution and certain other aspects of the Separation for tax-free treatment for U.S. federal income tax purposes.

Although the IRS ruling, if received, will generally be binding on the IRS, the continuing validity of such ruling will be subject to the accuracy of factual representations and assumptions made in the ruling request. Also, as part of the IRS’s general policy with respect to rulings on spin-off and split-off transactions (including the Distribution), the IRS will not rule on the overall qualification of the transaction for tax-free treatment, but instead only on certain significant issues related thereto. As a result of this IRS policy, Danaher will obtain the opinion of counsel described above. The opinion will be based upon various factual representations and assumptions, as well as certain undertakings made by Danaher and Newco. If any of those factual representations or assumptions are untrue or incomplete in any material respect, any undertaking is not complied with, or the facts upon which the opinion will be based are materially different from the facts at the time of the Distribution, the Distribution may not qualify for tax-free treatment. Opinions of counsel are not binding on the IRS. As a result, the conclusions expressed in the opinion of counsel could be challenged by the IRS, and if the IRS prevails in such challenge, the tax consequences to Danaher and its stockholders could be materially unfavorable.

If the Distribution were determined not to qualify for non-recognition of gain and loss under Sections 355 and 368(a)(1)(D) of the Code, Danaher would generally recognize gain with respect to the transfer of Newco common units in the Distribution.

The Distribution and certain aspects of the Separation could be taxable to Danaher if Newco, its unit holders, NetScout or NetScout’s stockholders were to engage in a Disqualifying Action. In such cases, under the Tax Matters Agreement, Newco and NetScout will be required to indemnify Danaher against any taxes resulting from the Distribution or certain aspects of the Separation that arise as a result of a Disqualifying Action. If Danaher were to recognize gain on the Distribution or certain aspects of the Separation for reasons not related to a Disqualifying Action by Newco or NetScout, Danaher would not be entitled to be indemnified under the Tax Matters Agreement and the resulting tax to Danaher could have a material adverse effect on Danaher. If Newco or NetScout were required to indemnify Danaher as a result of the Distribution or certain aspects of the Separation being taxable, this indemnification obligation would likely be substantial and could have a material adverse effect on NetScout, including with respect to its financial condition and results of operations.

NetScout is required to abide by potentially significant restrictions which could limit NetScout’s ability to undertake certain corporate actions (such as the issuance of NetScout common stock or the undertaking of a merger or consolidation) that otherwise could be advantageous.

To preserve the tax-free treatment to Danaher and/or its stockholders of the Distribution and certain related transactions, under the Tax Matters Agreement, NetScout is restricted from taking any action that prevents such transactions from being tax-free for U.S. federal income tax purposes. These restrictions may limit NetScout’s ability to pursue certain strategic transactions or engage in other transactions, including using NetScout common stock to make acquisitions and in connection with equity capital market transactions that might increase the value of NetScout’s business. See “Additional Material Agreements—Tax Matters Agreement” for a detailed description of these restrictions.

Failure to consummate the Transactions could adversely impact the market price of NetScout’s common stock as well as NetScout’s business, financial condition and results of operations.

If the Transactions are not completed for any reason, the price of NetScout’s common stock may decline. In addition, NetScout may be subject to additional risks, including:

• depending on the reasons for and the timing of the termination of the Merger Agreement, the requirement in the Merger Agreement that NetScout pay Danaher a termination fee of $55 million or reimburse Danaher for certain out-of-pocket costs relating to the Transactions;

• substantial costs related to the Transactions, such as legal, accounting, regulatory filing, financial advisory and financial printing fees, which must be paid regardless of whether the Transactions are completed; and

The Merger Agreement contains provisions that may discourage other companies from trying to acquire NetScout. In addition, NetScout will have more shares of its common stock outstanding after the Transactions, which may discourage other companies from trying to acquire NetScout.

The Merger Agreement contains provisions that may discourage a third-party from submitting a business combination proposal to NetScout prior to the closing of the Transactions that might result in greater value to NetScout stockholders than the Transactions. For example, the Merger Agreement generally prohibits NetScout from soliciting any takeover proposal. In addition, if the Merger Agreement is terminated by NetScout or Danaher in circumstances that obligate NetScout to pay a termination fee or to reimburse transaction expenses to Danaher, NetScout’s liquidity or financial condition may be materially adversely affected as a result of such payment, and the requirement to make such a payment might deter third parties from proposing alternative business combination proposals. In addition, the Merger Agreement requires that NetScout seek stockholder approval for the issuance of shares of NetScout common stock in the Merger, even if the NetScout board of directors changes its recommendation regarding the issuance of shares of NetScout common stock in the Merger.

NetScout expects to issue 62.5 million shares of its common stock as part of the Transactions, assuming no adjustments pursuant to the Merger Agreement. Because NetScout will be a significantly larger company and have significantly more shares of its common stock outstanding after the Transactions, an acquisition of NetScout may become more expensive. As a result, some companies may not seek to acquire NetScout, and the reduction in potential parties that may seek to acquire NetScout could negatively impact the prices at which NetScout’s common stock trades.

NetScout’s estimates and judgments related to the acquisition accounting models used to record the purchase price allocation may be inaccurate.

Management will make significant accounting judgments and estimates for the application of acquisition accounting under US generally accepted accounting principles, and the underlying valuation models. NetScout’s business, operating results and financial condition could be materially and adversely impacted in future periods if NetScout’s accounting judgments and estimates related to these models prove to be inaccurate.

NetScout may be required to recognize impairment charges for goodwill and other intangible assets.

The proposed transaction will add approximately $2.7 billion of goodwill and other intangible assets to NetScout’s consolidated balance sheet. In accordance with US generally accepted accounting principles, management periodically assesses these assets to determine if they are impaired. Significant negative industry or economic trends, disruptions to NetScout’s business, inability to effectively integrate acquired businesses, unexpected significant changes or planned changes in use of the assets, divestitures and market capitalization declines may impair goodwill and other intangible assets. Any charges relating to such impairments would adversely affect results of operations in the periods recognized.

Other Risks that Relate to NetScout, Including the Communications Business, After the Transactions

NetScout’s failure to successfully integrate the Communications Business into its business within its expected timetable could adversely affect the combined company’s future results and the market price of NetScout’s common stock following the completion of the Transactions.

The success of the Transactions will depend, in large part, on NetScout’s ability, as a combined company following the completion of the Transactions to realize the anticipated benefits and on the sales and profitability of the combined company. To realize these anticipated benefits, the combined company must successfully integrate its respective businesses. This integration will be complex and time-consuming. The failure to successfully integrate and manage the challenges presented by the integration process may result in NetScout’s failure to achieve some or all of the anticipated benefits of the Transactions.

Potential difficulties that may be encountered in the integration process include the following:

• Lost sales and customers as a result of customers of NetScout’s or the Communications Business deciding not to do business with the combined company;

• Complexities associated with managing the larger, more complex, combined business;

• Integrating personnel of NetScout’s and the Communications Business while maintaining focus on providing consistent, high quality products and service to customers;

• The loss of key employees; and

• Potential unknown liabilities and unforeseen expenses, delays or regulatory conditions associated with the Transactions.

If any of these events were to occur, NetScout’s ability to maintain relationships with customers, channel partners, suppliers and employees or NetScout’s ability to achieve the anticipated benefits of the Transactions could be adversely affected, or could reduce NetScout’s sales or earnings or otherwise adversely affect NetScout’s

business and financial results after the Transactions and, as a result, adversely affect the market price of NetScout’s common stock.

The success of the combined company will also depend on relationships with third parties and pre-existing customers and channel partners of NetScout and the Communications Business, which relationships may be affected by customer, channel partner or third-party preferences or public attitudes about the Transactions. Any adverse changes in these relationships could adversely affect the combined company’s business, financial condition or results of operations.

The combined company’s success will depend on NetScout’s ability to maintain and renew relationships with pre-existing customers, channel partners, suppliers, and other third-parties of both NetScout and the Communications Business and NetScout’s ability to establish new relationships. There can be no assurance that the business of the combined company will be able to maintain and renew pre-existing contracts and other business relationships, or enter into or maintain new contracts and other business relationships, on acceptable terms, if at all. The failure to maintain important business relationships could have a material adverse effect on NetScout’s business, financial condition or results of operations as a combined company.

The growth of the combined company could suffer if the markets into which the combined company sells its products and services experience cyclicality.

The growth of the combined company will depend in part on the growth of the markets which the Communications Business serves. The Communications Business serves certain industries that have historically been cyclical and have experienced periodic downturns that have had a material adverse impact on demand for the products, software and services that the Communications Business offers. Any of these factors could adversely affect the business, financial condition and results of operations of the combined company in any given period.

Defects, quality issues, inadequate disclosure or misuse with respect to the products, software or services of the combined company could adversely affect the business, reputation and financial statements of the combined company.

Defects in, quality issues with respect to or inadequate disclosure of risks relating to the use of the combined company’s products, software and services, or the misuse of the combined company’s products, software and services, could lead to lost profits and other economic damage, property damage, violation of privacy rights, personal injury or other liability resulting in third party claims, criminal liability, significant costs, damage to its reputation and loss of business. Any of these factors could adversely affect the business, financial condition and results of operations of the combined company.

International economic, political, legal, compliance and business factors could negatively affect the financial statements and growth of the combined company.

The Communications Business derives significant sales from customers outside the U.S. and certain manufacturing operations, suppliers and employees of the Communications Business are located outside the U.S. The Communications Business expects to continue to increase its sales and presence outside the U.S., particularly in the high-growth markets. The Communications Business’ international business (and particularly its business in high-growth markets) is subject to risks that are customarily encountered in non-U.S. operations, any of which could negatively affect the business, financial condition and results of operations of the combined company.

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - Contractual Maturities of Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Available-for-sale securities:
Due in 1 year or less	$ 87,967	$ 75,234
Due after 1 year through 5 years	46,055	41,484
Fair Value	$ 134,022	$ 116,718

XML

COMMITMENTS AND CONTINGENCIES - Narrative (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability	$ 4,445,000	$ 4,291,000
Contractual non-compliance liabilities incurred by Simena		49,000
Simena LLC
Commitments and Contingencies Disclosure [Line Items]
Number of contingent liabilities recorded	2
Fair value of contingent liability	8,000,000
Contractual non-compliance liabilities incurred by Simena	1,600,000
Simena LLC | Present value of future consideration
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability	4,400,000
Contractual non-compliance liabilities incurred by Simena	0
Contingent contractual obligation	$ 0

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) (USD $)	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Managing period of hedging forecasted cash flows for operating expenses denominated in foreign currencies		12 months
Contract maturity period		12 months
Reclassified gain (loss) as a result of discontinuance of cash flow hedges	$ 0	$ 0

XML

TREASURY STOCK - Narrative (Details) (USD $)	9 Months Ended		153 Months Ended	0 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2014	Apr. 22, 2014	Dec. 31, 2014	Jul. 26, 2006	Sep. 17, 2001
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)							4,000,000	1,000,000
Additional stock authorized to repurchase under stock repurchase program (in shares)							3,000,000
Shares repurchased during the period, value	$ 31,543,000	$ 25,033,000
Open market stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)	243,300		4,000,000
Shares repurchased during the period, value	9,400,000
Share Repurchase Program, April 2014
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)						256,700
Shares repurchased during the period, value						11,500,000
Stock repurchase program, authorized amount					100,000,000
Remaining stock authorized to repurchase under stock repurchase program				88,500,000
Restricted stock units
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)	243,063
Shares repurchased during the period, value	$ 10,600,000

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cost	$ 80,349	$ 81,457
Accumulated Amortization	(46,480)	(41,544)
Net	33,869	39,913
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	31,374	31,946
Accumulated Amortization	(25,201)	(23,524)
Net	6,173	8,422
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	38,641	38,801
Accumulated Amortization	(16,240)	(14,046)
Net	22,401	24,755
Distributor relationships
Finite-Lived Intangible Assets [Line Items]
Cost	1,787	2,014
Accumulated Amortization	(727)	(568)
Net	1,060	1,446
Core technology
Finite-Lived Intangible Assets [Line Items]
Cost	7,331	7,572
Accumulated Amortization	(3,472)	(2,701)
Net	3,859	4,871
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	315	355
Accumulated Amortization	(315)	(295)
Net	0	60
Other
Finite-Lived Intangible Assets [Line Items]
Cost	901	769
Accumulated Amortization	(525)	(410)
Net	$ 376	$ 359

XML

NET INCOME PER SHARE (Tables)

9 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Calculations of the Basic and Diluted Net Income Per Share and Potential Common Shares

Calculations of the basic and diluted net income per share and potential common shares are as follows (in thousands, except for per share data):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Numerator:
Net income	$	17,629	$	17,294	$	40,338	$	32,430
Denominator:
Denominator for basic net income per share - weighted average common shares outstanding	41,206		41,425		41,128		41,417
Dilutive common equivalent shares:
Weighted average stock options	7		43		11		63
Weighted average restricted stock units	323		416		540		489
Denominator for diluted net income per share - weighted average shares outstanding	41,536		41,884		41,679		41,969
Net income per share:
Basic net income per share	$	0.43	$	0.42	$	0.98	$	0.78
Diluted net income per share	$	0.42	$	0.41	$	0.97	$	0.77

Antidilutive Securities Excluded from Computation of Diluted EPS

The following table sets forth restricted stock units excluded from the calculation of diluted net income per share, since their inclusion would be antidilutive (in thousands):

	Three Months Ended		Nine Months Ended
	December 31,		December 31,
	2014	2013	2014	2013
Restricted stock units	19	—	12	195

XML

NET INCOME PER SHARE - Antidilutive Securities Excluded from Computation of Diluted EPS (Details) (Restricted stock units) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Restricted stock units (in shares)	19	0	12	195

XML

BASIS OF PRESENTATION (Policies)

9 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers: Topic 606 (ASU 2014-09), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company in its first quarter of fiscal year 2018 using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU 2014-09; or (ii) retrospective with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU 2014-09. The Company is currently evaluating the impact of its pending adoption of ASU 2014-09 on its consolidated financial statements.

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Foreign Exchange Forward Contracts on Other Comprehensive Income and Results of Operations (Details) (Forward contracts, USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (924)	[1]	$ 87	[1]	$ (1,663)	[1]	$ 90	[1]
Gain (Loss) Reclassified from Accumulated OCI into Income	(347)	[2]	40	[2]	(310)	[2]	(249)	[2]
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	(51)	[3]	78	[3]	172	[3]	169	[3]
Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	1	[2]	(109)	[2]	23	[2]	(293)	[2]
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	(46)	[3]	75	[3]	148	[3]	172	[3]
Sales and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	(348)	[2]	149	[2]	(333)	[2]	44	[2]
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	$ (5)	[3]	$ 3	[3]	$ 24	[3]	$ (3)	[3]

[1] The amount represents the change in fair value of derivative contracts due to changes in spot rates.

[2] The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

[3] The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

XML

FAIR VALUE MEASUREMENTS - Reconciliation of Changes in Fair Value of Level III Financial Assets (Details) (Fair value, measurements, recurring, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2014
Contingent Purchase Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ (4,291)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(154)
Balance at end of period	(4,445)
Contingent Contractual Non-compliance Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	(49)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	49
Balance at end of period	$ 0

XML

SHARE-BASED COMPENSATION - Narrative (Details) (USD $)	9 Months Ended
	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of common stock price for employees	85.00%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP shares purchased in period (in shares)	59,897
ESPP share price (in USD per share)	46.07

XML

RESTRUCTURING CHARGES - Narrative (Details) (Severance, USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2013
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1.2

XML

RELATED PARTY TRANSACTION - Narrative (Details) (EMC, Corp., Member of board of directors, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2014
EMC, Corp. | Member of board of directors
Related Party Transaction [Line Items]
Revenue	$ 208

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Expected Future Amortization Expense (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015 (remaining three months)	$ 1,759
2016	6,455
2017	5,850
2018	5,004
2019	4,044
Thereafter	10,757
Total	$ 33,869

XML

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

9 Months Ended

Dec. 31, 2014

Risks and Uncertainties [Abstract]

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

Financial instruments that potentially subject us to concentration of credit risk consist primarily of investments, trade accounts receivable and accounts payable. Our cash, cash equivalents, and marketable securities are placed with financial institutions with high credit standings.

At December 31, 2014, the Company had no indirect channel partner or direct customer which accounted for more than 10% of the accounts receivable balance. At March 31, 2014, one direct customer accounted for more than 10% of the accounts receivable balance, while no indirect channel partner accounted for more than 10% of the accounts receivable balance.

During the three and nine months ended December 31, 2014, no direct customer or indirect channel partner accounted for more than 10% of our total revenue.

During the three and nine months ended December 31, 2013, one direct customer accounted for more than 10% of our total revenue, while no indirect channel partner accounted for more than 10% of our total revenue.

Historically, the Company has not experienced any significant failure of its customers to meet their payment obligations nor does the Company anticipate material non-performance by its customers in the future; accordingly, the Company does not require collateral from its customers. However, if the Company’s assumptions are incorrect, there could be an adverse impact on its allowance for doubtful accounts.

XML

PROPOSED ACQUISITION - Narrative (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	6 Months Ended
	Dec. 31, 2014	Sep. 30, 2015
Newco
Business Acquisition [Line Items]
Acquisition related costs	$ 6.2
Merger agreement termination fee | Newco
Business Acquisition [Line Items]
Contract termination fee	55
Scenario, forecast
Business Acquisition [Line Items]
Ownership percentage		40.50%
Scenario, forecast | Newco
Business Acquisition [Line Items]
Percentage of common stock outstanding		59.50%
Scenario, forecast | Common stock | Newco
Business Acquisition [Line Items]
Shares issued in business acquisition (in shares)		62.5
Common stock conversion multiplier		1.46
Scenario, forecast | RBC capital markets
Business Acquisition [Line Items]
Acquisition related costs		11.0
Scenario, forecast | Consummation of mergers | RBC capital markets
Business Acquisition [Line Items]
Acquisition related costs		9.5

XML

INVENTORIES - Components of Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 3,257	$ 6,025
Work in process	127	161
Finished goods	6,890	6,394
Total inventories	$ 10,274	$ 12,580

XML

INVENTORIES (Tables)

9 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Components of Inventories

Inventories consist of the following (in thousands):

	December 31, 2014		March 31, 2014
Raw materials	$	3,257	$	6,025
Work in process	127		161
Finished goods	6,890		6,394
	$	10,274	$	12,580

XML

FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities

The following tables present the Company’s financial assets and liabilities measured on a recurring basis using the fair value hierarchy at December 31, 2014 and March 31, 2014 (in thousands).

	Fair Value Measurements at
	December 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	106,704	$	—		$	—		$	106,704
U.S. government and municipal obligations	39,852		79,849			—			119,701
Commercial paper	—		7,590			—			7,590
Corporate bonds	6,731		—			—			6,731
Derivative financial instruments	—		16			—			16
	$	153,287	$	87,455		$	—		$	240,742
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,445	)	$	(4,445	)
Derivative financial instruments	—		(1,223		)	—			(1,223		)
	$	—	$	(1,223	)	$	(4,445	)	$	(5,668	)

	Fair Value Measurements at
	March 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	82,079	$	19,997		$	—		$	102,076
U.S. government and municipal obligations	21,992		69,765			—			91,757
Commercial paper	—		14,581			—			14,581
Corporate bonds	10,380		—			—			10,380
Derivative financial instruments	—		368			—			368
	$	114,451	$	104,711		$	—		$	219,162
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,291	)	$	(4,291	)
Contingent contractual non-compliance liability	—		—			(49		)	(49		)
Derivative financial instruments	—		(139		)	—			(139		)
	$	—	$	(139	)	$	(4,340	)	$	(4,479	)

Reconciliation of Changes in Fair Value of Level III Financial Assets

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the nine months ended December 31, 2014 (in thousands):

	Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at beginning of period	$	(4,291	)	$	(49	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(154		)	49
Balance at end of period	$	(4,445	)	$	—

XML

NET INCOME PER SHARE - Calculations of Basic and Diluted Net Income Per Share and Potential Common Shares (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income	$ 17,629	$ 17,294	$ 40,338	$ 32,430
Denominator:
Denominator for basic net income per share - weighted average common shares outstanding (in shares)	41,206	41,425	41,128	41,417
Dilutive common equivalent shares:
Weighted average stock options (in shares)	7	43	11	63
Weighted average restricted stock units (in shares)	323	416	540	489
Denominator for diluted net income per share - weighted average shares outstanding (in shares)	41,536	41,884	41,679	41,969
Net income per share:
Basic net income per share (in USD per share)	$ 0.43	$ 0.42	$ 0.98	$ 0.78
Diluted net income per share (in USD per share)	$ 0.42	$ 0.41	$ 0.97	$ 0.77

XML

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014 reporting_unit	Dec. 31, 2013	Mar. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Number of reporting units			2
Goodwill	$ 200,271,000		$ 200,271,000		$ 203,446,000
Carrying value of intangible assets	52,469,000		52,469,000		58,513,000
Payments to acquire software rights			131,000	713,000
Weighted average useful life of acquired intangible assets			10 years 1 month 6 days
Amortization expenses	821,000	860,000	2,539,000	2,571,000
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	18,600,000		18,600,000		18,600,000
Developed Technology, Accanto Systems
Acquired Finite-Lived Intangible Assets [Line Items]
Payments to acquire software rights					500,000
Weighted average useful life of acquired intangible assets					6 years 3 months 18 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Payments to acquire software rights					300,000
Weighted average useful life of acquired intangible assets					3 years
Acquired software and core technology | Included as cost of product revenue
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expenses	905,000	837,000	2,800,000	2,500,000
Other acquired intangible assets | Included as operating expense
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expenses	858,000	891,000	2,700,000	2,700,000
Developed and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets			6 years 8 months 12 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets			13 years 3 months 18 days
Unified Service Delivery
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	197,900,000		197,900,000		201,000,000
Test Optimization
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,400,000		$ 2,400,000		$ 2,400,000

XML

GOODWILL AND INTANGIBLE ASSETS (Tables)

9 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the nine months ended December 31, 2014 are as follows (in thousands):

Balance at March 31, 2014	$	203,446
Foreign currency translation impact for the nine months ended December 31, 2014	(3,175		)
Balance at December 31, 2014	$	200,271

Schedule of Intangible Assets

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at December 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,374	$	(25,201	)	$	6,173
Customer relationships	38,641		(16,240		)	22,401
Distributor relationships	1,787		(727		)	1,060
Core technology	7,331		(3,472		)	3,859
Non-compete agreements	315		(315		)	—
Other	901		(525		)	376
	$	80,349	$	(46,480	)	$	33,869

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,946	$	(23,524	)	$	8,422
Customer relationships	38,801		(14,046		)	24,755
Distributor relationships	2,014		(568		)	1,446
Core technology	7,572		(2,701		)	4,871
Non-compete agreements	355		(295		)	60
Other	769		(410		)	359
	$	81,457	$	(41,544	)	$	39,913

Schedule of Expected Future Amortization Expense

The following is the expected future amortization expense at December 31, 2014 for the years ending March 31 (in thousands):

2015 (remaining three months)	$	1,759
2016	6,455
2017	5,850
2018	5,004
2019	4,044
Thereafter	10,757
	$	33,869

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)

9 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Notional Amounts and Fair Values of Derivative Instruments on Consolidated Balance Sheet

The notional amounts and fair values of derivative instruments in the consolidated balance sheets at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	Notional Amounts (a)				Other Current Assets				Accrued Other Liabilities
	December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014
Derivatives Designated as Hedging Instruments:
Forward contracts	$	19,776	$	17,483	$	16	$	368	$	1,223	$	139

(a) Notional amounts represent the gross contract/notional amount of the derivatives outstanding.

Effect of Foreign Exchange Forward Contracts on OCI and Results of Operations

The following table provides the effect foreign exchange forward contracts had on other comprehensive income (loss) (OCI) and results of operations for the three months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014			December 31, 2013
Forward contracts	$	(924	)	$	87	Research and development	$	1		$	(109	)	Research and development	$	(46	)	$	75
						Sales and marketing	(348		)	149			Sales and marketing	(5		)	3
	$	(924	)	$	87		$	(347	)	$	40			$	(51	)	$	78

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

The following table provides the effect foreign exchange forward contracts had on OCI and results of operations for the nine months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014		December 31, 2013
Forward contracts	$	(1,663	)	$	90	Research and development	$	23		$	(293	)	Research and development	$	148	$	172
						Sales and marketing	(333		)	44			Sales and marketing	24		(3		)
	$	(1,663	)	$	90		$	(310	)	$	(249	)		$	172	$	169

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

XML

BASIS OF PRESENTATION

9 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION

The accompanying unaudited interim consolidated financial statements have been prepared by NetScout Systems, Inc., or NetScout or the Company. Certain information and footnote disclosures normally included in financial statements prepared under generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, the unaudited interim consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the Company’s financial position, results of operations and cash flows. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. The results reported in these consolidated financial statements are not necessarily indicative of results that may be expected for the entire year. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2014.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers: Topic 606 (ASU 2014-09), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company in its first quarter of fiscal year 2018 using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU 2014-09; or (ii) retrospective with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application and providing certain additional disclosures as defined per ASU 2014-09. The Company is currently evaluating the impact of its pending adoption of ASU 2014-09 on its consolidated financial statements.

XML

RESTRUCTURING CHARGES (Tables)

9 Months Ended

Dec. 31, 2014

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Liability

The following table provides a summary of the activity related to this restructuring plan and the related liability included as accrued compensation on the Company's consolidated balance sheet (in thousands):

	Three months ended		Nine Months Ended
Employee Severance:	December 31, 2014		December 31, 2014
Balance at beginning of period	$	—	$	71
Other adjustments	—		—
Cash payments	—		(71		)
Balance at December 31, 2014	$	—	$	—

XML

FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities (Details) (USD $)	Dec. 31, 2014	Mar. 31, 2014
ASSETS:
Cash and cash equivalents	$ 106,704,000	$ 102,076,000
Marketable securities	134,022,000	116,718,000
Derivative financial instruments	16,000	368,000
Total assets	240,742,000	219,162,000
LIABILITIES:
Contingent purchase consideration	(4,445,000)	(4,291,000)
Contingent contractual non-compliance liability		(49,000)
Derivative financial instruments	(1,223,000)	(139,000)
Total liabilities	(5,668,000)	(4,479,000)
U.S. government and municipal obligations
ASSETS:
Marketable securities	119,701,000	91,757,000
Commercial paper
ASSETS:
Marketable securities	7,590,000	14,581,000
Corporate bonds
ASSETS:
Marketable securities	6,731,000	10,380,000
Level 1
ASSETS:
Cash and cash equivalents	106,704,000	82,079,000
Derivative financial instruments	0	0
Total assets	153,287,000	114,451,000
LIABILITIES:
Contingent purchase consideration	0	0
Contingent contractual non-compliance liability		0
Derivative financial instruments	0	0
Total liabilities	0	0
Level 1 | U.S. government and municipal obligations
ASSETS:
Marketable securities	39,852,000	21,992,000
Level 1 | Commercial paper
ASSETS:
Marketable securities	0	0
Level 1 | Corporate bonds
ASSETS:
Marketable securities	6,731,000	10,380,000
Level 2
ASSETS:
Cash and cash equivalents	0	19,997,000
Derivative financial instruments	16,000	368,000
Total assets	87,455,000	104,711,000
LIABILITIES:
Contingent purchase consideration	0	0
Contingent contractual non-compliance liability		0
Derivative financial instruments	(1,223,000)	(139,000)
Total liabilities	(1,223,000)	(139,000)
Level 2 | U.S. government and municipal obligations
ASSETS:
Marketable securities	79,849,000	69,765,000
Level 2 | Commercial paper
ASSETS:
Marketable securities	7,590,000	14,581,000
Level 2 | Corporate bonds
ASSETS:
Marketable securities	0	0
Level 3
ASSETS:
Cash and cash equivalents	0	0
Derivative financial instruments	0	0
Total assets	0	0
LIABILITIES:
Contingent purchase consideration	(4,445,000)	(4,291,000)
Contingent contractual non-compliance liability		(49,000)
Derivative financial instruments	0	0
Total liabilities	(4,445,000)	(4,340,000)
Level 3 | U.S. government and municipal obligations
ASSETS:
Marketable securities	0	0
Level 3 | Commercial paper
ASSETS:
Marketable securities	0	0
Level 3 | Corporate bonds
ASSETS:
Marketable securities	$ 0	$ 0

XML

RESTRUCTURING CHARGES - Schedule of Restructuring Liability (Details) (Severance, USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
Severance
Employee Severance:
Balance at beginning of period	$ 0	$ 71
Other adjustments	0	0
Cash payments	0	(71)
Balance at December 31, 2014	$ 0	$ 0

XML

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 106,704	$ 102,076
Marketable securities	87,967	75,234
Accounts receivable, net of allowance for doubtful accounts of $177 and $313 at December 31, 2014 and March 31, 2014, respectively	83,415	60,518
Inventories	10,274	12,580
Prepaid income taxes	2,864	1,012
Deferred income taxes	14,174	15,846
Prepaid expenses and other current assets	9,846	11,496
Total current assets	315,244	278,762
Fixed assets, net	23,016	23,098
Goodwill	200,271	203,446
Intangible assets, net	52,469	58,513
Long-term marketable securities	46,055	41,484
Other assets	1,873	2,460
Total assets	638,928	607,763
Current liabilities:
Accounts payable	10,927	11,541
Accrued compensation	39,369	34,901
Accrued other	11,026	6,430
Income taxes payable	0	791
Deferred revenue	107,595	109,301
Total current liabilities	168,917	162,964
Other long-term liabilities	2,147	2,370
Deferred tax liability	2,679	2,757
Accrued long-term retirement benefits	1,586	1,581
Long-term deferred revenue	27,036	24,639
Contingent liabilities, net of current portion	4,445	4,291
Total liabilities	206,810	198,602
Commitments and contingencies (Note 11)
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at December 31, 2014 and March 31, 2014	0	0
Common stock, $0.001 par value:
150,000,000 shares authorized; 50,717,718 and 49,922,959 shares issued and 41,217,480 and 41,165,784 shares outstanding at December 31, 2014 and March 31, 2014, respectively	51	50
Additional paid-in capital	292,059	273,574
Accumulated other comprehensive income (loss)	(1,552)	2,772
Treasury stock at cost, 9,500,238 and 8,757,175 shares at December 31, 2014 and March 31, 2014, respectively	(149,345)	(117,802)
Retained earnings	290,905	250,567
Total stockholders’ equity	432,118	409,161
Total liabilities and stockholders’ equity	$ 638,928	$ 607,763

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2014
Goodwill [Roll Forward]
Balance at March 31, 2014	$ 203,446
Foreign currency translation impact for the nine months ended December 31, 2014	(3,175)
Balance at December 31, 2014	$ 200,271

XML

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Changes in market value of derivatives, taxes	$ (327)	$ 31	$ (595)	$ 35
Reclassification adjustment for net losses included in net income, benefits	$ 133	$ (15)	$ 115	$ 85

XML

SEGMENT AND GEOGRAPHIC INFORMATION - Narrative (Details)	9 Months Ended
	Dec. 31, 2014 Segment
Segment Reporting [Abstract]
Number of reportable segments	1

XML

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS - Narrative (Details) (Customer Concentration Risk)	9 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2014 Customer	Mar. 31, 2014 Customer	Dec. 31, 2014 Customer	Dec. 31, 2013 Customer	Dec. 31, 2013 Customer
Indirect Customer | Accounts receivable
Concentration Risk [Line Items]
Number of customers contributing to more than 10% of total revenue	0	0
Indirect Customer | Sales Revenue
Concentration Risk [Line Items]
Number of customers contributing to more than 10% of total revenue	0		0	0	0
Direct Customer | Accounts receivable
Concentration Risk [Line Items]
Number of customers contributing to more than 10% of total revenue	0	1
Direct Customer | Sales Revenue
Concentration Risk [Line Items]
Number of customers contributing to more than 10% of total revenue	0		0	1	1
Minimum | Indirect Customer | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%
Minimum | Indirect Customer | Sales Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%		10.00%	10.00%	10.00%
Minimum | Direct Customer | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%
Minimum | Direct Customer | Sales Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%		10.00%	10.00%	10.00%

XML

SEGMENT AND GEOGRAPHIC INFORMATION

9 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

SEGMENT AND GEOGRAPHIC INFORMATION

SEGMENT AND GEOGRAPHIC INFORMATION

The Company reports revenues and income under one reportable segment. The consolidated financial information is used by the chief operating decision maker in deciding how to allocate resources and in assessing performance.

The Company manages its business in the following geographic areas: United States, Europe, Asia and the rest of the world. In accordance with United States export control regulations, the Company does not sell or do business with countries subject to economic sanctions and export controls.

Total revenue by geography is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
United States	$	88,905	$	86,747	$	254,260	$	216,364
Europe	16,981		12,313		37,032		33,906
Asia	8,075		4,035		19,464		14,788
Rest of the world	8,872		7,333		23,528		19,272
	$	122,833	$	110,428	$	334,284	$	284,330

The United States revenue includes sales to resellers in the United States. These resellers fulfill customer orders and may subsequently ship the Company’s products to international locations. The Company reports these shipments as United States revenue since the Company ships the products to a United States location. A majority of revenue attributable to locations outside of the United States is a result of export sales. Substantially all of the Company’s identifiable assets are located in the United States.

XML

SHARE-BASED COMPENSATION - Components of Share-Based Compensation Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 4,150	$ 3,217	$ 11,947	$ 9,959
Cost of product revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	85	62	238	174
Cost of service revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	294	194	836	566
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,455	1,157	3,971	3,316
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,221	944	3,419	2,952
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 1,095	$ 860	$ 3,483	$ 2,951

XML

PROPOSED ACQUISITION

9 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

PROPOSED ACQUISITION

PROPOSED ACQUISITION

On October 12, 2014, NetScout Systems, Inc., Danaher Corporation (Danaher), Potomac Holding LLC, a wholly-owned subsidiary of Danaher (Newco), RS Merger Sub I, Inc., a wholly-owned subsidiary of the Company (Merger Sub) and RS Merger Sub II, LLC, a wholly-owned subsidiary of the Company (Merger Sub II and, together with Merger Sub, the Merger Subs), entered into an Agreement and Plan of Merger and Reorganization (Merger Agreement) pursuant to which the Company will acquire the communications group business of Danaher conducted under the brands Tektronix Communications, Fluke Networks and Arbor Networks (Communications Business), but excluding Danaher’s data communications cable installation business and its communication service provider business in a Reverse Morris Trust transaction (the Transaction).

Prior to the Mergers (as defined below) and pursuant to a Separation and Distribution Agreement (Distribution Agreement), dated as of October 12, 2014, among Danaher, Newco and the Company, Danaher will, among other things, transfer the Communications Business to Newco and, thereafter, Danaher will distribute to Danaher stockholders all of the issued and outstanding shares of Newco (the Distribution).

Immediately following the Distribution, the Company, Danaher, Newco and the Merger Subs will effect a two-step merger process whereby (i) Merger Sub I will merge with and into Newco, with Newco continuing as the surviving corporation (the First Merger) and (ii) immediately following the First Merger, Newco will merge with and into Merger Sub II, with Merger Sub II surviving as a wholly-owned subsidiary of the Company (the Second Merger, and together with the First Merger, the Mergers).

Upon consummation of the transactions contemplated by the Merger Agreement and the Distribution Agreement, the common units of Newco then outstanding will be automatically converted into 62.5 million shares of the Company’s common stock (the Company Common Stock) and will represent approximately 59.5% of the Company Common Stock outstanding after giving effect to the stock issuance in the Transaction. The Company’s existing stockholders will continue to hold the remaining approximately 40.5% of the Company Common Stock. The common units of Newco then outstanding could convert into more than 62.5 million shares of the Company’s common stock if the Company issues Company Common Stock in certain acquisitions prior to the First Merger (in which case such additional conversion shares shall be calculated by multiplying 1.46 by the number of shares of Company Common Stock issued in such acquisition).

The consummation of the First Merger is subject to various customary closing conditions, including, among other things (i) accuracy of Danaher’s and the Company’ representations and warranties, (ii) compliance by Danaher and the Company with certain covenants in the Merger Agreement, (iii) effectiveness of the registration statements to be filed with the Securities and Exchange Commission to register the Newco common units and the Company Common Stock to be issued to Danaher’s stockholders, (iv) approval of the Company’s stockholders of the issuance of the Company Common Stock in the First Merger, (v) completion of the transactions contemplated by the Distribution Agreement, (vi) no material adverse effect shall have occurred with respect to either the Company or the Communications Business, (vii) expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvement Act of 1976, as amended, (viii) absence of any law or order from any court or governmental authority restraining, enjoining or prohibiting the Transaction, (ix) receipt of certain rulings from the Internal Revenue Service and (x) receipt of certain tax opinions from tax counsel to Danaher.

The Merger Agreement contains certain termination rights for both the Company and Danaher and further provides that, upon termination of the Merger Agreement under specified circumstances, the Company must pay Danaher a termination fee of $55 million. The circumstances under which the Company must pay Danaher the termination fee include, among other circumstances:

•the Merger Agreement is terminated by Danaher following a Company triggering event. A Company triggering event is defined in the Merger Agreement to include, among other things, the failure of the Company’s board of directors to recommend that the Company’s stockholders vote in favor of the issuance of the Company Common Stock in the First Merger, the withdrawal or adverse modification by the Company’s board of directors of such recommendation, or the Company’s material breach of its covenants not to solicit any alternative acquisition proposal.

•(1) a competing bona fide acquisition proposal is presented by a third party to the Company or its stockholders, (2) the Merger Agreement is thereafter terminated (A) by either party for failure to close before October 12, 2015, (B) by Danaher as a result of a breach by the Company of its representations or covenants that results in the failure of a closing condition that cannot be cured or (C) by either Danaher or the Company because the Company has failed to obtain stockholder approval, and (3) within 9 months after the termination of the Merger Agreement, the Company enters into an agreement for or consummates an acquisition proposal made by a third party.

The Company has incurred $6.2 million in acquisition related costs during the nine months ended December 31, 2014.

In connection with RBC Capital Markets’ services as NetScout’s financial advisor, NetScout has agreed to pay RBC Capital Markets an aggregate fee of $11 million, a portion of which was payable upon delivery of RBC Capital Markets’ opinion and $9.5 million of which is contingent upon consummation of the Mergers. NetScout also has agreed to reimburse RBC Capital Markets for expenses reasonably incurred in connection with RBC Capital Markets’ services and to indemnify RBC Capital Markets and related persons against certain liabilities, including liabilities under the federal securities laws, arising out of RBC Capital Markets’ engagement.

The transaction is expected to increase NetScout’s scale and broaden its customer base in both the service provider and enterprise markets, while accelerating NetScout’s entry into the Cyber Intelligence market.  The transaction is expected to close in the first half of NetScout’s fiscal year 2016.

XML

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 40,338	$ 32,430
Adjustments to reconcile net income to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	14,449	13,774
Loss on disposal of fixed assets	536	38
Deal related compensation expense and accretion charges	114	114
Share-based compensation expense associated with equity awards	11,947	9,959
Net change in fair value of contingent and contractual liabilities	(9)	(289)
Deferred income taxes	2,151	4,259
Other losses (gains)	84	(69)
Changes in assets and liabilities
Accounts receivable	(22,973)	(302)
Inventories	1,359	(5,346)
Prepaid expenses and other assets	(143)	1,345
Accounts payable	(700)	(1,255)
Accrued compensation and other expenses	10,132	2,259
Income taxes payable	(791)	591
Deferred revenue	828	3,259
Net cash provided by operating activities	57,322	60,767
Cash flows from investing activities:
Purchase of marketable securities	(78,547)	(88,802)
Proceeds from maturity of marketable securities	61,189	49,405
Purchase of fixed assets	(8,630)	(8,709)
Purchase of intangible assets	(131)	(713)
Decrease in deposits	103	37
Net cash used in investing activities	(26,016)	(48,782)
Cash flows from financing activities:
Issuance of common stock under stock plans	105	755
Payment of contingent consideration	0	(841)
Treasury stock repurchases	(31,543)	(25,033)
Excess tax benefit from share-based compensation awards	4,322	2,039
Net cash used in financing activities	(27,116)	(23,080)
Effect of exchange rate changes on cash and cash equivalents	438	(187)
Net increase (decrease) in cash and cash equivalents	4,628	(11,282)
Cash and cash equivalents, beginning of period	102,076	99,930
Cash and cash equivalents, end of period	106,704	88,648
Supplemental disclosures:
Cash paid for income taxes	20,830	12,628
Non-cash transactions:
Transfers of inventory to fixed assets	940	1,781
Additions to property, plant and equipment included in accounts payable	380	233
Gross decrease in contractual liability relating to fair value adjustment	(49)	(148)
Gross increase (decrease) in contingent consideration liability relating to fair value adjustment	40	(141)
Issuance of common stock under employee stock plans	$ 2,760	$ 2,230

XML

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 177	$ 313
Preferred stock, par value (in USD per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	50,717,718	49,922,959
Common stock, shares outstanding	41,217,480	41,165,784
Treasury stock, shares	9,500,238	8,757,175

XML

RESTRUCTURING CHARGES

9 Months Ended

Dec. 31, 2014

Restructuring and Related Activities [Abstract]

RESTRUCTURING CHARGES

RESTRUCTURING CHARGES

During the fiscal year ended March 31, 2013, the Company restructured part of its international sales organization related to an overlap of personnel acquired as part of the Accanto acquisition. The Company recorded $1.2 million of restructuring charges related to severance costs.

The following table provides a summary of the activity related to this restructuring plan and the related liability included as accrued compensation on the Company's consolidated balance sheet (in thousands):

	Three months ended		Nine Months Ended
Employee Severance:	December 31, 2014		December 31, 2014
Balance at beginning of period	$	—	$	71
Other adjustments	—		—
Cash payments	—		(71		)
Balance at December 31, 2014	$	—	$	—

XML

Document and Entity Information	9 Months Ended
	Dec. 31, 2014	Jan. 22, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	NETSCOUT SYSTEMS INC
Entity Central Index Key	0001078075
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	NTCT
Amendment Flag	false
Entity Common Stock, Shares Outstanding		41,217,480

XML

COMMITMENTS AND CONTINGENCIES

9 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Acquisition related– The Company recorded two contingent liabilities related to the acquisition of Simena, LLC (Simena), one relates to future consideration to be paid to the former owner which had an initial fair value of $8.0 million at the time of acquisition and another relates to contractual non-compliance liabilities incurred by Simena with an initial fair value of $1.6 million at the time of acquisition. At December 31, 2014, the present value of the future consideration was $4.4 million and the contractual non-compliance liability was $0. The contingent contractual obligation has been reduced to zero as NetScout has either settled those liabilities or believes that because of the passage of time that the probability of a future negative settlement is essentially zero.

Legal – From time to time, NetScout is subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a significant adverse effect on the Company’s financial condition, results of operations or cash flows.

XML

Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Product	$ 76,446	$ 68,561	$ 198,765	$ 163,895
Service	46,387	41,867	135,519	120,435
Total revenue	122,833	110,428	334,284	284,330
Cost of revenue:
Product	18,310	14,534	45,015	36,117
Service	8,672	9,068	26,158	24,111
Total cost of revenue	26,982	23,602	71,173	60,228
Gross profit	95,851	86,826	263,111	224,102
Operating expenses:
Research and development	18,864	18,348	56,872	50,951
Sales and marketing	34,836	32,425	104,304	96,184
General and administrative	13,391	7,929	33,211	22,367
Amortization of acquired intangible assets	821	860	2,539	2,571
Total operating expenses	67,912	59,562	196,926	172,073
Income from operations	27,939	27,264	66,185	52,029
Interest and other income (expense), net:
Interest income	95	66	298	210
Interest expense	(191)	(198)	(580)	(575)
Other (expense) income, net	(416)	176	(904)	277
Total interest and other income (expense), net	(512)	44	(1,186)	(88)
Income before income tax expense	27,427	27,308	64,999	51,941
Income tax expense	9,798	10,014	24,661	19,511
Net income	$ 17,629	$ 17,294	$ 40,338	$ 32,430
Basic net income per share (in USD per share)	$ 0.43	$ 0.42	$ 0.98	$ 0.78
Diluted net income per share (in USD per share)	$ 0.42	$ 0.41	$ 0.97	$ 0.77
Weighted average common shares outstanding used in computing:
Net income per share - basic (in shares)	41,206	41,425	41,128	41,417
Net income per share - diluted (in shares)	41,536	41,884	41,679	41,969

XML

FAIR VALUE MEASUREMENTS

9 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant non-observable inputs. The following tables present the Company’s financial assets and liabilities measured on a recurring basis using the fair value hierarchy at December 31, 2014 and March 31, 2014 (in thousands).

	Fair Value Measurements at
	December 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	106,704	$	—		$	—		$	106,704
U.S. government and municipal obligations	39,852		79,849			—			119,701
Commercial paper	—		7,590			—			7,590
Corporate bonds	6,731		—			—			6,731
Derivative financial instruments	—		16			—			16
	$	153,287	$	87,455		$	—		$	240,742
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,445	)	$	(4,445	)
Derivative financial instruments	—		(1,223		)	—			(1,223		)
	$	—	$	(1,223	)	$	(4,445	)	$	(5,668	)

	Fair Value Measurements at
	March 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	82,079	$	19,997		$	—		$	102,076
U.S. government and municipal obligations	21,992		69,765			—			91,757
Commercial paper	—		14,581			—			14,581
Corporate bonds	10,380		—			—			10,380
Derivative financial instruments	—		368			—			368
	$	114,451	$	104,711		$	—		$	219,162
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,291	)	$	(4,291	)
Contingent contractual non-compliance liability	—		—			(49		)	(49		)
Derivative financial instruments	—		(139		)	—			(139		)
	$	—	$	(139	)	$	(4,340	)	$	(4,479	)

This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at fair value, including marketable securities and derivative financial instruments.

The Company’s Level 1 investments are classified as such because they are valued using quoted market prices or alternative pricing sources with reasonable levels of price transparency.

The Company’s Level 2 investments are classified as such because fair value is being calculated using data from similar but not identical sources, or a discounted cash flow model using the contractual interest rate as compared to the underlying interest yield curve. The Company's derivative financial instruments consist of forward foreign exchange contracts and are classified as Level 2 because the fair values of these derivatives are determined using models based on market observable inputs, including spot prices for foreign currencies and credit derivatives, as well as an interest rate factor. The Company classifies municipal obligations as level 2 because the fair values are determined using quoted prices from markets the Company considers to be inactive. Commercial paper is classified as Level 2 because the Company uses market information from similar but not identical instruments and discounted cash flow models based on interest rate yield curves to determine fair value. For further information on the Company's derivative instruments refer to Note 8.

The Company’s contingent purchase consideration at December 31, 2014 and March 31, 2014 was classified as Level 3 in the fair value hierarchy. The contingent contractual non-compliance liability was also classified as Level 3 at March 31, 2014. At December 31, 2014, the contingent contractual obligation has been reduced to zero as NetScout has either settled those liabilities or believes that because of the passage of time that the probability of a future negative settlement is essentially zero. These liabilities are valued by probability weighting expected payment scenarios and then applying a discount based on the present value of the future cash flow streams. They are classified as Level 3 because the probability weighting of future payment scenarios is based on assumptions developed by management.

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the nine months ended December 31, 2014 (in thousands):

	Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at beginning of period	$	(4,291	)	$	(49	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(154		)	49
Balance at end of period	$	(4,445	)	$	—

The Company has updated the probabilities used in the fair value calculation of the contingent liabilities at December 31, 2014 which reduced the liability by $9 thousand and is included as part of earnings for the nine months ended December 31, 2014. Key assumptions include a 3.3% discount rate, and a percent weighted-probability of the settlement of the contingent contractual non-compliance liability. Deal related compensation expense, accretion charges and changes related to settlements of contractual non-compliance liabilities for the nine months ended December 31, 2014 was $114 thousand and was included as part of earnings.

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

9 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents and those investments with original maturities greater than three months to be marketable securities. Cash and cash equivalents consisted of money market instruments and cash maintained with various financial institutions at December 31, 2014 and March 31, 2014.

Marketable Securities

The following is a summary of marketable securities held by NetScout at December 31, 2014 classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	74,483	$	15		$	74,498
Commercial paper	7,586		4			7,590
Corporate bonds	5,882		(3		)	5,879
Total short-term marketable securities	87,951		16			87,967
U.S. government and municipal obligations	45,248		(45		)	45,203
Corporate bonds	852		0			852
Total long-term marketable securities	46,100		(45		)	46,055
Total marketable securities	$	134,051	$	(29	)	$	134,022

The following is a summary of marketable securities held by NetScout at March 31, 2014, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	53,854	$	26		$	53,880
Commercial paper	14,581		—			14,581
Corporate bonds	6,772		1			6,773
Total short-term marketable securities	75,207		27			75,234
U.S. government and municipal obligations	37,875		2			37,877
Corporate bonds	3,611		(4		)	3,607
Total long-term marketable securities	41,486		(2		)	41,484
Total marketable securities	$	116,693	$	25		$	116,718

Contractual maturities of the Company’s marketable securities held at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	December 31, 2014		March 31, 2014
Available-for-sale securities:
Due in 1 year or less	$	87,967	$	75,234
Due after 1 year through 5 years	46,055		41,484
	$	134,022	$	116,718

XML

RELATED PARTY TRANSACTION

9 Months Ended

Dec. 31, 2014

Related Party Transactions [Abstract]

RELATED PARTY TRANSACTION

RELATED PARTY TRANSACTION

A member of the Company’s Board of Directors also serves as a member of the board of directors for EMC, Corp. (EMC) and therefore, the Company considers the sale of equipment to EMC to be a related party transaction.  The Company generated $208 thousand in revenue from EMC during the nine months ended December 31, 2014.

XML

TREASURY STOCK

9 Months Ended

Dec. 31, 2014

Equity [Abstract]

TREASURY STOCK

TREASURY STOCK

On September 17, 2001, the Company announced an open market stock repurchase program to purchase up to one million shares of outstanding Company common stock, subject to market conditions and other factors. Any purchases under the Company’s stock repurchase program may be made from time to time without prior notice. On July 26, 2006, the Company announced that it had expanded the existing open market stock repurchase program to enable the Company to purchase up to an additional three million shares of the Company’s outstanding common stock, bringing the total number of shares authorized for repurchase to four million shares. Through June 30, 2014, the Company had repurchased a total of 4,000,000 shares of common stock through the open market stock repurchase program. The Company repurchased 243,300 shares for $9.4 million under this program during the nine months ended December 31, 2014. At June 30, 2014, all authorized shares under this stock repurchase program have been repurchased.

On April 22, 2014, the Company's board of directors approved an additional stock repurchase program. This program authorizes management to make additional repurchases of NetScout outstanding common stock of up to $100 million. The share repurchase authorization does not have an expiration date and the pace and timing of repurchases will depend on factors such as cash generation from operations, cash requirements for acquisitions, economic and market conditions, stock price and legal and regulatory requirements. Through December 31, 2014, the Company has repurchased 256,700 shares totaling $11.5 million in the open market under this stock repurchase plan. At December 31, 2014, $88.5 million of common stock remained available to be purchased under the plan.

In connection with the vesting and release of the restriction on previously vested shares of restricted stock units, the Company repurchased 243,063 shares for $10.6 million related to minimum statutory tax withholding requirements on these restricted stock units during the nine months ended December 31, 2014. These repurchase transactions do not fall under the repurchase program described above, and therefore do not reduce the amount that is available for repurchase under that program.

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

9 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

NetScout operates internationally and, in the normal course of business, is exposed to fluctuations in foreign currency exchange rates. The exposures result from costs that are denominated in currencies other than the U.S. Dollar, primarily the Euro, British Pound, Canadian Dollar, and Indian Rupee. The Company manages its foreign cash flow risk by hedging forecasted cash flows for operating expenses denominated in foreign currencies for up to twelve months, within specified guidelines through the use of forward contracts. The Company enters into foreign currency exchange contracts to hedge cash flow exposures from costs that are denominated in currencies other than the U.S. Dollar. These hedges are designated as cash flow hedges at inception.

All of the Company’s derivative instruments are utilized for risk management purposes, and the Company does not use derivatives for speculative trading purposes. These contracts will mature over the next twelve months and are expected to impact earnings on or before maturity.

The notional amounts and fair values of derivative instruments in the consolidated balance sheets at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	Notional Amounts (a)				Other Current Assets				Accrued Other Liabilities
	December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014		December 31, 2014		March 31, 2014
Derivatives Designated as Hedging Instruments:
Forward contracts	$	19,776	$	17,483	$	16	$	368	$	1,223	$	139

(a) Notional amounts represent the gross contract/notional amount of the derivatives outstanding.

The following table provides the effect foreign exchange forward contracts had on other comprehensive income (loss) (OCI) and results of operations for the three months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014			December 31, 2013
Forward contracts	$	(924	)	$	87	Research and development	$	1		$	(109	)	Research and development	$	(46	)	$	75
						Sales and marketing	(348		)	149			Sales and marketing	(5		)	3
	$	(924	)	$	87		$	(347	)	$	40			$	(51	)	$	78

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

The following table provides the effect foreign exchange forward contracts had on OCI and results of operations for the nine months ended December 31, 2014 and 2013 (in thousands):

Derivatives in Cash Flow Hedging Relationships	Effective Portion												Ineffective Portion
	Gain (Loss) Recognized in OCI on Derivative (a)					Gain (Loss) Reclassified from Accumulated OCI into Income (b)							Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing) (c)
	December 31, 2014			December 31, 2013		Location	December 31, 2014			December 31, 2013			Location	December 31, 2014		December 31, 2013
Forward contracts	$	(1,663	)	$	90	Research and development	$	23		$	(293	)	Research and development	$	148	$	172
						Sales and marketing	(333		)	44			Sales and marketing	24		(3		)
	$	(1,663	)	$	90		$	(310	)	$	(249	)		$	172	$	169

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b) The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.

(c) The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.

XML

SEGMENT AND GEOGRAPHIC INFORMATION - Total Revenue by Geography (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total revenue	$ 122,833	$ 110,428	$ 334,284	$ 284,330
United States
Segment Reporting Information [Line Items]
Total revenue	88,905	86,747	254,260	216,364
Europe
Segment Reporting Information [Line Items]
Total revenue	16,981	12,313	37,032	33,906
Asia
Segment Reporting Information [Line Items]
Total revenue	8,075	4,035	19,464	14,788
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 8,872	$ 7,333	$ 23,528	$ 19,272

XML

INVENTORIES

9 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories are stated at the lower of actual cost or net realizable value. Cost is determined by using the first in, first out (FIFO) method. Inventories consist of the following (in thousands):

	December 31, 2014		March 31, 2014
Raw materials	$	3,257	$	6,025
Work in process	127		161
Finished goods	6,890		6,394
	$	10,274	$	12,580

XML

GOODWILL AND INTANGIBLE ASSETS

9 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS

Goodwill

The Company has two reporting units: (1) Unified Service Delivery and (2) Test Optimization. At December 31, 2014 and March 31, 2014, goodwill attributable to the Unified Service Delivery reporting unit was $197.9 million and $201.0 million, respectively. Goodwill attributable to the Test Optimization reporting unit was $2.4 million at December 31, 2014 and March 31, 2014. Goodwill is tested for impairment at a reporting unit level at least annually, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the reporting unit below its carrying value.

The change in the carrying amount of goodwill for the nine months ended December 31, 2014 is due to the impact of foreign currency translation adjustments related to asset balances that are recorded in currencies other than the U.S. Dollar.

The changes in the carrying amount of goodwill for the nine months ended December 31, 2014 are as follows (in thousands):

Balance at March 31, 2014	$	203,446
Foreign currency translation impact for the nine months ended December 31, 2014	(3,175		)
Balance at December 31, 2014	$	200,271

Intangible Assets

The net carrying amounts of intangible assets were $52.5 million and $58.5 million at December 31, 2014 and March 31, 2014, respectively. Intangible assets acquired in a business combination are recorded under the acquisition method of accounting at their estimated fair values at the date of acquisition. The Company amortizes intangible assets over their estimated useful lives, except for the acquired trade name which resulted from the Network General Central Corporation (Network General) acquisition, which has an indefinite life and thus is not amortized. The carrying value of the indefinite lived trade name is evaluated for potential impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.

During the fiscal year ended March 31, 2014, the Company acquired certain rights to Accanto Systems, S.r.l. (Accanto) software not previously purchased as part of the acquisition transaction in fiscal year 2013 for $500 thousand.  This amount is included within developed technology and is being amortized using the economic benefit method and a useful life of 6.3 years.

During the fiscal year ended March 31, 2014, the Company acquired a certain technology license for $300 thousand. This amount is included within developed technology at March 31, 2014 and is being amortized using the economic benefit method and a useful life of 3 years.

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at December 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,374	$	(25,201	)	$	6,173
Customer relationships	38,641		(16,240		)	22,401
Distributor relationships	1,787		(727		)	1,060
Core technology	7,331		(3,472		)	3,859
Non-compete agreements	315		(315		)	—
Other	901		(525		)	376
	$	80,349	$	(46,480	)	$	33,869

Intangible assets include an indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2014 (in thousands):

	Cost		Accumulated Amortization			Net
Developed technology	$	31,946	$	(23,524	)	$	8,422
Customer relationships	38,801		(14,046		)	24,755
Distributor relationships	2,014		(568		)	1,446
Core technology	7,572		(2,701		)	4,871
Non-compete agreements	355		(295		)	60
Other	769		(410		)	359
	$	81,457	$	(41,544	)	$	39,913

Amortization of software and core technology included as cost of product revenue was $905 thousand and $2.8 million for the three and nine months ended December 31, 2014, respectively. Amortization of other intangible assets included as operating expense was $858 thousand and $2.7 million for the three and nine months ended December 31, 2014, respectively.

Amortization of software and core technology included as cost of product revenue was $837 thousand and $2.5 million for the three and nine months ended December 31, 2013, respectively. Amortization of other intangible assets included as operating expense was $891 thousand and $2.7 million for the three and nine months ended December 31, 2013, respectively.

The following is the expected future amortization expense at December 31, 2014 for the years ending March 31 (in thousands):

2015 (remaining three months)	$	1,759
2016	6,455
2017	5,850
2018	5,004
2019	4,044
Thereafter	10,757
	$	33,869

The weighted average amortization period of developed technology and core technology is 6.7 years. The weighted average amortization period for customer and distributor relationships is 13.3 years. The weighted average amortization period for amortizing all intangible assets is 10.1 years.

XML

LONG-TERM DEBT

9 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBT

On November 22, 2011, the Company entered into a credit facility (the Credit Agreement) with a syndicate of lenders led by KeyBank National Association (KeyBank) providing the Company with a $250 million revolving credit facility, which may be increased to $300 million at any time up to 90 days before maturity. The revolving credit facility includes a swing line loan sub-facility of up to $10 million and a letter of credit sub-facility of up to $10 million. The credit facility under the Credit Agreement matures on November 21, 2016. At December 31, 2014, there were no amounts outstanding under this credit facility.

At the Company’s election, revolving loans under the Credit Agreement bear interest at either (a) a rate per annum equal to the highest of (1) KeyBank’s prime rate, (2) 0.50% in excess of the federal funds effective rate, or (3) one hundred (100.00) basis points in excess of the London Interbank Offered Rate (LIBOR) for one-month interest periods, or the Base Rate; or (b) the one-, two-, three-, or six-month per annum LIBOR, as selected by the Company, multiplied by the statutory reserve adjustment, or collectively, the Eurodollar Rate, in each case plus an applicable margin. Swing line loans will bear interest at the Base Rate plus the applicable Base Rate margin. The applicable margin depends on the Company’s leverage ratio, ranging from 100 basis points for Base Rate loans and 200 basis points for Eurodollar Rate loans if the Company’s consolidated leverage ratio is 2.50 to 1.00 or higher, down to 25 basis points for Base Rate loans and 125 basis points for Eurodollar Rate loans if the Company’s consolidated leverage ratio is 1.00 to 1.00 or less.

The Company may prepay loans under the Credit Agreement at any time, without penalty, subject to certain notice requirements. Debt is recorded at the amount drawn on the revolving credit facility plus interest based on floating rates reflective of changes in the market which approximates fair value.

The loans are guaranteed by each of the Company’s domestic subsidiaries and are collateralized by all of the assets of the Company and its domestic subsidiaries, as well as 65% of the capital stock of the Company’s foreign subsidiaries directly owned by the Company and its domestic subsidiaries. The Credit Agreement generally prohibits any other liens on the assets of the Company and its subsidiaries, subject to certain exceptions as described in the Credit Agreement. The Credit Agreement contains certain covenants applicable to the Company and its subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes (including material mergers and dispositions of assets), dividends and distributions, capital expenditures, investments (including material acquisitions and investments in foreign subsidiaries), transactions with affiliates, sale-leaseback transactions, hedge agreements, payment of junior financing, material changes in business, and other limitations customary in senior secured credit facilities. In addition, the Company is required to maintain certain consolidated leverage and interest coverage ratios as well as a minimum liquidity amount. At December 31, 2014, the Company was in compliance with all of these covenants.

XML

SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

9 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Total Revenue by Geography

Total revenue by geography is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
United States	$	88,905	$	86,747	$	254,260	$	216,364
Europe	16,981		12,313		37,032		33,906
Asia	8,075		4,035		19,464		14,788
Rest of the world	8,872		7,333		23,528		19,272
	$	122,833	$	110,428	$	334,284	$	284,330

XML

LONG-TERM DEBT - Narrative (Details) (USD $)	0 Months Ended	9 Months Ended
	Nov. 22, 2011	Dec. 31, 2014
Debt Instrument [Line Items]
Revolving credit facility outstanding amount	$ 250,000,000	$ 0
Increase in revolving credit facility outstanding amount	300,000,000
Term for increase in revolving credit facility before maturity date, days	90 days
Line of credit facility, maturity	Nov. 21, 2016
Percentage of capital stock of foreign subsidiaries used as guarantee		65.00%
Federal funds effective rate
Debt Instrument [Line Items]
Interest rate in excess of effective rate	0.50%
LIBOR
Debt Instrument [Line Items]
Margin over applicable interest rate	1.00%
Maximum
Debt Instrument [Line Items]
Leverage ratio	1.00
Maximum | Base rate loans
Debt Instrument [Line Items]
Margin over applicable interest rate	1.00%
Maximum | Eurodollar rate loans
Debt Instrument [Line Items]
Margin over applicable interest rate	2.00%
Minimum
Debt Instrument [Line Items]
Leverage ratio	2.50
Minimum | Base rate loans
Debt Instrument [Line Items]
Margin over applicable interest rate	0.25%
Minimum | Eurodollar rate loans
Debt Instrument [Line Items]
Margin over applicable interest rate	1.25%
Swing line loan sub-facility | Maximum
Debt Instrument [Line Items]
Revolving credit facility outstanding amount	10,000,000
Letter of credit sub-facility | Maximum
Debt Instrument [Line Items]
Revolving credit facility outstanding amount	$ 10,000,000

XML

INCOME TAXES

9 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Our effective income tax rates were 35.7% and 36.7% for the three months ended December 31, 2014 and 2013, respectively.  Generally, the effective tax rates differ from statutory rates due to the impact of the domestic production activities deduction, research and development credits if enacted, the impact of state taxes, income generated in jurisdictions that have a different tax rate than the U.S. statutory rate, and losses not benefited in certain foreign jurisdictions.The effective tax rate for the three months ended December 31, 2014 is lower than the effective rate for the three months ended December 31, 2013 primarily due to the increase in the domestic production activities deduction as well as the delayed reenactment of the research and development tax credit.

Our effective tax rates were 37.9% and 37.6% for the nine months ended December 31, 2014 and 2013, respectively. At this time, the effective tax rate is higher than the comparable year primarily due to an increase in certain foreign losses for which a benefit cannot be realized.

XML

SHARE-BASED COMPENSATION (Tables)

9 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Components of Share-Based Compensation Expense

The following is a summary of share-based compensation expense including restricted stock units and employee stock purchases made under our employee stock purchase plan (ESPP) based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Cost of product revenue	$	85	$	62	$	238	$	174
Cost of service revenue	294		194		836		566
Research and development	1,455		1,157		3,971		3,316
Sales and marketing	1,221		944		3,419		2,952
General and administrative	1,095		860		3,483		2,951
	$	4,150	$	3,217	$	11,947	$	9,959

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Summary of Notional Amounts and Fair Values of Derivative Instruments on Consolidated Balance Sheet (Details) (Forward contracts, USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Mar. 31, 2014
Derivatives, Fair Value [Line Items]
Notional Amounts	$ 19,776	[1]	$ 17,483	[1]
Other Current Assets
Derivatives, Fair Value [Line Items]
Other Current Assets	16		368
Accrued Other Liabilities
Derivatives, Fair Value [Line Items]
Accrued Other Liabilities	$ 1,223		$ 139

[1] Notional amounts represent the gross contract/notional amount of the derivatives outstanding.

XML

FAIR VALUE MEASUREMENTS - Narrative (Details) (USD $)	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent contractual non-compliance liability			$ 49,000
Recognized adjustment in earnings for decrease in liability	9,000
Fair value assumption, discount rate	3.30%
Deal related compensation expense and accretion charges	114,000	114,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent contractual non-compliance liability			49,000
Contingent contractual obligation	$ 0

XML

Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 17,629	$ 17,294	$ 40,338	$ 32,430
Other comprehensive income:
Cumulative translation adjustments	(1,290)	405	(3,397)	1,624
Changes in market value of investments:
Changes in unrealized (losses) gains	(75)	3	(54)	7
Total net change in market value of investments	(75)	3	(54)	7
Changes in market value of derivatives:
Changes in market value of derivatives, net of (benefits) taxes of ($327), $31, ($595) and $35	(597)	56	(1,068)	55
Reclassification adjustment for net gains (losses) included in net income, net of taxes (benefits) of $133, ($15), $115 and $85	214	(25)	195	164
Total net change in market value of derivatives	(383)	31	(873)	219
Other comprehensive (loss) income	(1,748)	439	(4,324)	1,850
Total comprehensive income	$ 15,881	$ 17,733	$ 36,014	$ 34,280

XML

SHARE-BASED COMPENSATION

9 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION

The following is a summary of share-based compensation expense including restricted stock units and employee stock purchases made under our employee stock purchase plan (ESPP) based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Cost of product revenue	$	85	$	62	$	238	$	174
Cost of service revenue	294		194		836		566
Research and development	1,455		1,157		3,971		3,316
Sales and marketing	1,221		944		3,419		2,952
General and administrative	1,095		860		3,483		2,951
	$	4,150	$	3,217	$	11,947	$	9,959

Employee Stock Purchase Plan – The Company maintains an ESPP for all eligible employees as described in the Company’s Annual Report on Form 10-K for the year ended March 31, 2014. Under the ESPP, shares of the Company’s common stock may be purchased on the last day of each bi-annual offering period at 85% of the fair value on the last day of such offering period. The offering periods run from March 1 through August 31 and from September 1 through February 28 of each year. During the nine months ended December 31, 2014, employees purchased 59,897 shares under the ESPP and the value per share was $46.07.

XML

INCOME TAXES - Narrative (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Estimated annual effective tax rate	35.70%	36.70%	37.90%	37.60%

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)

9 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities

The following is a summary of marketable securities held by NetScout at December 31, 2014 classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	74,483	$	15		$	74,498
Commercial paper	7,586		4			7,590
Corporate bonds	5,882		(3		)	5,879
Total short-term marketable securities	87,951		16			87,967
U.S. government and municipal obligations	45,248		(45		)	45,203
Corporate bonds	852		0			852
Total long-term marketable securities	46,100		(45		)	46,055
Total marketable securities	$	134,051	$	(29	)	$	134,022

The following is a summary of marketable securities held by NetScout at March 31, 2014, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	53,854	$	26		$	53,880
Commercial paper	14,581		—			14,581
Corporate bonds	6,772		1			6,773
Total short-term marketable securities	75,207		27			75,234
U.S. government and municipal obligations	37,875		2			37,877
Corporate bonds	3,611		(4		)	3,607
Total long-term marketable securities	41,486		(2		)	41,484
Total marketable securities	$	116,693	$	25		$	116,718

Contractual Maturities of Marketable Securities

Contractual maturities of the Company’s marketable securities held at December 31, 2014 and March 31, 2014 were as follows (in thousands):

	December 31, 2014		March 31, 2014
Available-for-sale securities:
Due in 1 year or less	$	87,967	$	75,234
Due after 1 year through 5 years	46,055		41,484
	$	134,022	$	116,718

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 134,051	$ 116,693
Unrealized Gains (Losses)	(29)	25
Fair Value	134,022	116,718
U.S. government and municipal obligations
Schedule of Available-for-sale Securities [Line Items]
Fair Value	119,701	91,757
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Fair Value	7,590	14,581
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Fair Value	6,731	10,380
Short-term marketable securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	87,951	75,207
Unrealized Gains (Losses)	16	27
Fair Value	87,967	75,234
Short-term marketable securities | U.S. government and municipal obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	74,483	53,854
Unrealized Gains (Losses)	15	26
Fair Value	74,498	53,880
Short-term marketable securities | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,586	14,581
Unrealized Gains (Losses)	4	0
Fair Value	7,590	14,581
Short-term marketable securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,882	6,772
Unrealized Gains (Losses)	(3)	1
Fair Value	5,879	6,773
Long-term marketable securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	46,100	41,486
Unrealized Gains (Losses)	(45)	(2)
Fair Value	46,055	41,484
Long-term marketable securities | U.S. government and municipal obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45,248	37,875
Unrealized Gains (Losses)	(45)	2
Fair Value	45,203	37,877
Long-term marketable securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	852	3,611
Unrealized Gains (Losses)	0	(4)
Fair Value	$ 852	$ 3,607

XML

NET INCOME PER SHARE

9 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

NET INCOME PER SHARE

NET INCOME PER SHARE

Calculations of the basic and diluted net income per share and potential common shares are as follows (in thousands, except for per share data):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Numerator:
Net income	$	17,629	$	17,294	$	40,338	$	32,430
Denominator:
Denominator for basic net income per share - weighted average common shares outstanding	41,206		41,425		41,128		41,417
Dilutive common equivalent shares:
Weighted average stock options	7		43		11		63
Weighted average restricted stock units	323		416		540		489
Denominator for diluted net income per share - weighted average shares outstanding	41,536		41,884		41,679		41,969
Net income per share:
Basic net income per share	$	0.43	$	0.42	$	0.98	$	0.78
Diluted net income per share	$	0.42	$	0.41	$	0.97	$	0.77

The following table sets forth restricted stock units excluded from the calculation of diluted net income per share, since their inclusion would be antidilutive (in thousands):

	Three Months Ended		Nine Months Ended
	December 31,		December 31,
	2014	2013	2014	2013
Restricted stock units	19	—	12	195

Basic EPS is calculated by dividing net income by the weighted average number of shares outstanding during the period. Unvested restricted shares, although legally issued and outstanding, are not considered outstanding for purposes of calculating basic earnings per share. Diluted EPS is calculated by dividing net income by the weighted average number of shares outstanding plus the dilutive effect, if any, of outstanding stock options, restricted shares and restricted stock units using the treasury stock method. The calculation of the dilutive effect of outstanding equity awards under the treasury stock method includes consideration of proceeds from the assumed exercise of stock options, unrecognized compensation expense and any tax benefits as additional proceeds.