10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2020

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 000-26251

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

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered:
Common Stock, $0.001 par value per share	NTCT	Nasdaq Global Select Market

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  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

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

        Large accelerated filer  ☒            Accelerated filer             ☐    

        Non-accelerated filer   ☐             Smaller reporting company    ☐

                            Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  ☐    No  ☒

The number of shares outstanding of the registrant's common stock, par value $0.001 per share, as of October 29, 2020 was 73,576,022.

NETSCOUT SYSTEMS, INC.

FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2020

TABLE OF CONTENTS

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS		1
PART I: FINANCIAL INFORMATION
Item 1.	Unaudited Financial Statements:
	Consolidated Balance Sheets: At September 30, 2020 and March 31, 2020	2
	Consolidated Statements of Operations: For the three and six months ended September 30, 2020 and 2019	3
	Consolidated Statements of Comprehensive Loss: For the three and six months ended September 30, 2020 and 2019	4
	Consolidated Statements of Stockholder's Equity: For the three and six months ended September 30, 2020 and 2019	5
	Consolidated Statements of Cash Flows: For the six months ended September 30, 2020 and 2019	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	43
Item 4.	Controls and Procedures	43
PART II: OTHER INFORMATION
Item 1.	Legal Proceedings	44
Item 1A.	Risk Factors	44
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.	Defaults Upon Senior Securities	45
Item 4.	Mine Safety Disclosures	45
Item 5.	Other Information	45
Item 6.	Exhibits	46
SIGNATURES		47

Unless the context suggests otherwise, references in this Quarterly Report on Form 10-Q, or Quarterly Report, to "NetScout," the "Company," "we," "us," and "our" refer to NetScout Systems, Inc. and, where appropriate, our consolidated subsidiaries.

NetScout, the NetScout logo, Adaptive Service Intelligence and other trademarks or service marks of NetScout appearing in this Quarterly Report are the property of NetScout Systems, Inc. and/or its subsidiaries and/or affiliates in the United States and/or other countries. Any third-party trade names, trademarks and service marks appearing in this Quarterly Report are the property of their respective holders.

Cautionary Statement Concerning Forward-Looking Statements

In addition to historical information, the following discussion and other parts of this Quarterly Report contain forward-looking statements under Section 21E of the Securities Exchange Act of 1934, as amended, 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. The outcome of the events described in these forward-looking statements is subject to risks, uncertainties, and other factors, including those described in Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K for our fiscal year ended March 31, 2020, filed with the Securities and Exchange Commission, and elsewhere in this Quarterly Report. These factors may cause our actual results to differ materially from any forward-looking statement. Moreover, we operate in a very competitive and rapidly changing environment. New risks and uncertainties emerge from time to time, and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-looking statements contained in this Quarterly Report on Form 10-Q. We cannot assure you that the results, events, and circumstances reflected in the forward-looking statements will be achieved or occur, and actual results, events, or circumstances could differ materially from those described in the forward-looking statements.

The forward-looking statements made in this Quarterly Report on Form 10-Q relate only to events as of the date on which the statements are made. We undertake no obligation to update any forward-looking statements made in this Quarterly Report on Form 10-Q to reflect events or circumstances after the date of this Quarterly Report on Form 10-Q or to reflect new information or the occurrence of unanticipated events, except as required by law. We may not actually achieve the plans, intentions, or expectations disclosed in our forward-looking statements and you should not place undue reliance on our forward-looking statements. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures, or investments we may make.

1

PART I: FINANCIAL INFORMATION

Item 1. Unaudited Financial Statements

NetScout Systems, Inc.

Consolidated Balance Sheets

(In thousands, except share data)

	September 30, 2020		March 31, 2020
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	415,719	$	338,489
Marketable securities	12,127		47,969
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $782 and $1,350 at September 30, 2020 and March 31, 2020, respectively	169,687		213,514
Inventories and deferred costs	26,223		22,227
Prepaid income taxes	8,998		13,505
Prepaid expenses and other current assets	36,654		24,039
Total current assets	669,408		659,743
Fixed assets, net	53,168		57,715
Operating lease right-of-use assets	65,562		68,583
Goodwill	1,718,595		1,725,680
Intangible assets, net	551,783		582,179
Deferred income taxes	6,690		6,220
Long-term marketable securities	—		2,613
Other assets	12,345		17,770
Total assets	$	3,077,551	$	3,120,503
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable	$	18,083	$	20,004
Accrued compensation	61,842		75,632
Accrued other	34,484		21,840
Income taxes payable	233		903
Deferred revenue and customer deposits	236,240		270,281
Current portion of operating lease liabilities	11,325		10,337
Total current liabilities	362,207		398,997
Other long-term liabilities	14,646		10,039
Deferred tax liability	108,716		114,394
Accrued long-term retirement benefits	36,408		34,256
Long-term deferred revenue and customer deposits	99,581		104,240
Operating lease liabilities, net of current portion	66,673		70,658
Long-term debt	450,000		450,000
Total liabilities	1,138,231		1,182,584
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at September 30, 2020 and March 31, 2020	—		—
Common stock, $0.001 par value:
300,000,000 shares authorized; 123,840,945 and 122,006,077 shares issued and 73,574,035 and 72,220,906 shares outstanding at September 30, 2020 and March 31, 2020, respectively	123		122
Additional paid-in capital	2,924,757		2,891,553
Accumulated other comprehensive loss	(1,258)		(3,160)
Treasury stock at cost, 50,266,910 and 49,785,171 shares at September 30, 2020 and March 31, 2020, respectively	(1,318,535)		(1,305,935)
Retained earnings	334,233		355,339
Total stockholders' equity	1,939,320		1,937,919
Total liabilities and stockholders' equity	$	3,077,551	$	3,120,503

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

2

NetScout Systems, Inc.

Consolidated Statements of Operations

(In thousands, except per share data)

(Unaudited)

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Revenue:
Product	$	91,979	$	102,775	$	163,672	$	178,494
Service	113,360		113,646		225,482		223,951
Total revenue	205,339		216,421		389,154		402,445
Cost of revenue:
Product	26,977		29,368		48,129		56,303
Service	31,923		29,764		63,751		57,572
Total cost of revenue	58,900		59,132		111,880		113,875
Gross profit	146,439		157,289		277,274		288,570
Operating expenses:
Research and development	46,455		50,058		91,836		93,785
Sales and marketing	60,300		73,067		119,734		146,592
General and administrative	20,573		25,177		45,726		47,388
Amortization of acquired intangible assets	15,363		16,132		30,624		32,275
Restructuring charges	(31)		150		62		273
Total operating expenses	142,660		164,584		287,982		320,313
Income (loss) from operations	3,779		(7,295)		(10,708)		(31,743)
Interest and other expense, net:
Interest income	171		1,214		437		2,872
Interest expense	(2,715)		(5,173)		(5,789)		(11,538)
Other income (expense), net	(850)		343		(2,822)		651
Total interest and other expense, net	(3,394)		(3,616)		(8,174)		(8,015)
Income (loss) before income tax expense	385		(10,911)		(18,882)		(39,758)
Income tax expense	4,071		6,561		2,224		7,057
Net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Basic net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Diluted net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Weighted average common shares outstanding used in computing:
Net loss per share - basic	73,058		75,687		72,682		76,490
Net loss per share - diluted	73,058		75,687		72,682		76,490

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

3

NetScout Systems, Inc.

Consolidated Statements of Comprehensive Loss

(In thousands)

(Unaudited)

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Other comprehensive income (loss):
Cumulative translation adjustments	940		(525)		1,893		(1,086)
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) taxes of ($10), $5, ($33) and $11, respectively	(33)		2		(107)		37
Total net change in market value of investments	(33)		2		(107)		37
Changes in market value of derivatives:
Changes in market value of derivatives, net of taxes (benefit) of $55, ($22), $59 and ($41), respectively	181		(5)		188		(60)
Reclassification adjustment for net gains included in net loss, net of (benefit) taxes of ($32), $11, ($22) and $21, respectively	(105)		13		(72)		49
Total net change in market value of derivatives	76		8		116		(11)
Other comprehensive income (loss)	983		(515)		1,902		(1,060)
Total comprehensive loss	$	(2,703)	$	(17,987)	$	(19,204)	$	(47,875)

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

4

NetScout Systems, Inc.

Consolidated Statements of Stockholders' Equity

(In thousands, except share data)

(Unaudited)

	Three Months Ended September 30, 2020
	Common Stock Voting			Additional Paid In Capital		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Retained Earnings		Total Stockholders' Equity
	Shares	Par Value						Shares	Stated Value
Balance, June 30, 2020	122,353,504	$	122	$	2,903,055	$	(2,241)	49,898,334	$	(1,309,038)	$	337,919	$	1,929,817
Net loss											(3,686)		(3,686)
Unrealized net investment losses						(33)							(33)
Unrealized net gains on derivative financial instruments						76							76
Cumulative translation adjustments						940							940
Issuance of common stock pursuant to vesting of restricted stock units	1,207,629	1											1
Stock-based compensation expense for restricted stock units granted to employees				15,227									15,227
Issuance of common stock under employee stock purchase plan	279,812			6,475									6,475
Repurchase of treasury stock								368,576	(9,497)				(9,497)
Balance, September 30, 2020	123,840,945	$	123	$	2,924,757	$	(1,258)	50,266,910	$	(1,318,535)	$	334,233	$	1,939,320

	Six Months Ended September 30, 2020
	Common Stock Voting			Additional Paid In Capital		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Retained Earnings		Total Stockholders' Equity
	Shares	Par Value						Shares	Stated Value
Balance, March 31, 2020	122,006,077	$	122	$	2,891,553	$	(3,160)	49,785,171	$	(1,305,935)	$	355,339	$	1,937,919
Net loss											(21,106)		(21,106)
Unrealized net investment losses						(107)							(107)
Unrealized net gains on derivative financial instruments						116							116
Cumulative translation adjustments						1,893							1,893
Issuance of common stock pursuant to vesting of restricted stock units	1,555,056	1											1
Stock-based compensation expense for restricted stock units granted to employees				26,729									26,729
Issuance of common stock under employee stock purchase plan	279,812			6,475									6,475
Repurchase of treasury stock								481,739	(12,600)				(12,600)
Balance, September 30, 2020	123,840,945	$	123	$	2,924,757	$	(1,258)	50,266,910	$	(1,318,535)	$	334,233	$	1,939,320

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

5

NetScout Systems, Inc.

Consolidated Statements of Stockholders' Equity

(In thousands, except share data)

(Unaudited)

	Three Months Ended September 30, 2019
	Common Stock Voting			Additional Paid In Capital		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Retained Earnings		Total Stockholders’ Equity
	Shares	Par Value						Shares	Stated Value
Balance, June 30, 2019	120,123,018	$	120	$	2,841,001	$	(3,184)	43,568,720	$	(1,155,252)	$	328,750	$	2,011,435
Net loss											(17,472)		(17,472)
Unrealized net investment gains						2							2
Unrealized net gains on derivative financial instruments						8							8
Cumulative translation adjustments						(525)							(525)
Issuance of common stock pursuant to vesting of restricted stock units	1,228,094	2											2
Stock-based compensation expense for restricted stock units granted to employees				15,409									15,409
Issuance of common stock under employee stock purchase plan	297,635			6,593									6,593
Repurchase of treasury stock								3,241,980	(75,188)				(75,188)
Balance, September 30, 2019	121,648,747	$	122	$	2,863,003	$	(3,699)	46,810,700	$	(1,230,440)	$	311,278	$	1,940,264

	Six Months Ended September 30, 2019
	Common Stock Voting			Additional Paid In Capital		Accumulated Other Comprehensive Income (Loss)		Treasury Stock			Retained Earnings		Total Stockholders’ Equity
	Shares	Par Value						Shares	Stated Value
Balance, March 30, 2019	119,760,132	$	120	$	2,828,922	$	(2,639)	42,149,771	$	(1,119,063)	$	358,093	$	2,065,433
Net loss											(46,815)		(46,815)
Unrealized net investment gains						37							37
Unrealized net losses on derivative financial instruments						(11)							(11)
Cumulative translation adjustments						(1,086)							(1,086)
Issuance of common stock pursuant to vesting of restricted stock units	1,590,980	2											2
Stock-based compensation expense for restricted stock units granted to employees				27,488									27,488
Issuance of common stock under employee stock purchase plan	297,635			6,593									6,593
Repurchase of treasury stock								4,660,929	(111,377)				(111,377)
Balance, September 30, 2019	121,648,747	$	122	$	2,863,003	$	(3,699)	46,810,700	$	(1,230,440)	$	311,278	$	1,940,264

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

6

NetScout Systems, Inc.

Consolidated Statements of Cash Flows

(In thousands)

(Unaudited)

	Six Months Ended
	September 30,
	2020		2019
Cash flows from operating activities:
Net loss	$	(21,106)	$	(46,815)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	53,152		58,666
Operating lease right-of-use assets	5,190		5,106
Loss on disposal of fixed assets	37		—
Share-based compensation expense	27,832		28,600
Net change in fair value of contingent and contractual liabilities	—		541
Accretion of contingent consideration	—		(24)
Deferred income taxes	(6,624)		(2,945)
Other gains	—		(85)
Changes in assets and liabilities
Accounts receivable and unbilled costs	44,640		32,937
Inventories	(5,472)		(2,484)
Prepaid expenses and other assets	(4,330)		11,289
Accounts payable	(1,339)		10,099
Accrued compensation and other expenses	9,484		(4,370)
Operating lease liabilities	(5,168)		(6,565)
Income taxes payable	(171)		(48)
Deferred revenue	(39,479)		(35,446)
Net cash provided by operating activities	56,646		48,456
Cash flows from investing activities:
Purchase of marketable securities	(6,780)		(83,502)
Proceeds from sales and maturity of marketable securities	45,094		98,147
Purchase of fixed assets	(5,769)		(9,056)
Purchase of intangible assets	(4,537)		—
Decrease (increase) in deposits	106		(4)
Acquisition of businesses	—		(4,154)
Net cash provided by investing activities	28,114		1,431
Cash flows from financing activities:
Issuance of common stock under stock plans	1		2
Payment of contingent consideration	(1,000)		—
Repayment of long-term debt	—		(100,000)
Treasury stock repurchases	—		(100,000)
Tax withholding on restricted stock units	(12,600)		(11,377)
Net cash used in financing activities	(13,599)		(211,375)
Effect of exchange rate changes on cash and cash equivalents	5,069		(2,268)
Net increase (decrease) in cash and cash equivalents and restricted cash	76,230		(163,756)
Cash and cash equivalents and restricted cash, beginning of period	340,237		409,820
Cash and cash equivalents and restricted cash, end of period	$	416,467	$	246,064
Supplemental disclosures:
Cash paid for interest	$	4,177	$	10,167
Cash paid for income taxes	$	5,377	$	7,232
Non-cash transactions:
Transfers of inventory to fixed assets	$	1,530	$	2,290
Additions to property, plant and equipment included in accounts payable	$	605	$	238
Issuance of common stock under employee stock plans	$	6,475	$	6,593
Contingent consideration related to acquisition, included in accrued other	$	—	$	1,000

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

7

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. (NetScout or the Company). Certain information and footnote disclosures normally included in financial statements prepared under United States 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 and stockholders' equity, results of operations and cash flows. The year-end consolidated balance sheet data and statement of stockholders' equity were derived from the Company's audited financial statements, but do not include all disclosures required by GAAP. The results reported in these unaudited interim consolidated financial statements are not necessarily indicative of results that may be expected for the entire year. All significant intercompany accounts and transactions are eliminated in consolidation.

These unaudited interim 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, 2020 filed with the Securities and Exchange Commission on May 20, 2020.

COVID-19 Risks and Uncertainties

The Company is closely monitoring the impact of COVID-19 on all aspects of its business. COVID-19 was declared a

global pandemic by the World Health Organization on March 11, 2020 and the President of the United States declared the

COVID-19 outbreak a national emergency. While the COVID-19 pandemic has not had a material adverse impact on the

Company’s operations to date, the future impacts of the pandemic and any resulting economic impact are largely unknown and

rapidly evolving. It is possible that the COVID-19 pandemic, the measures taken by the governments of countries affected and

the resulting economic impact may materially and adversely affect the Company’s results of operations, cash flows and

financial position as well as its customers.

Under Accounting Standards Update (ASU) 2014-15, Presentation of Financial Statements—Going Concern (Subtopic

205-40), or ASC 205-40, the Company has the responsibility to evaluate whether conditions and/or events raise substantial doubt about its ability to meet its future financial obligations as they become due within one year after the date that the financial

statements are issued. The Company is taking precautionary actions to reduce costs and spending across the organization. This

includes limiting discretionary spending and reducing hiring activities. In addition, based on covenant levels at September 30, 2020, the Company has an incremental $317 million available under the $1.0 billion revolving credit facility.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the CARES Act) was enacted. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The Company has elected to defer the employer-paid portion of social security taxes. As of September 30, 2020, the Company had deferred $7.4 million of employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022.

The Company expects net cash provided by operating activities combined with cash, cash equivalents, and marketable securities and borrowing availability under the Company's revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirements over at least the next twelve months.

Recent Accounting Pronouncements

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The adoption is not expected to have a material impact on the Company's financial position, results of operations, and disclosures.

In January 2020, the FASB issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321,

8

Topic 323, and Topic 815. This guidance addresses accounting for the transition into and out of the equity method and provides clarification of the interaction of rules for equity securities, the equity method of accounting, and forward contracts and purchase options on certain types of securities. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020. Early adoption is permitted. ASU 2020-01 is effective for NetScout beginning April 1, 2021. The Company is currently assessing the effect that ASU 2020-01 will have on its financial position, results of operations, and disclosures.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for fiscal years beginning after December 15, 2021. ASU 2019-12 is effective for NetScout beginning April 1, 2022. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company is currently assessing the effect that ASU 2019-12 will have on its financial position, results of operations, and disclosures.

In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. This ASU adds, modifies and clarifies several disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 adds, modifies and removes several disclosure requirements relative to the three levels of inputs used to measure fair value in accordance with Topic 820, Fair Value Measurement. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) and also issued subsequent amendments to the initial guidance: ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-11 and ASU 2020-02 (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held. Topic 326 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. The Company adopted the guidance prospectively as of April 1, 2020. The adoption did not result in a cumulative adjustment to retained earnings and has not had an impact on the Company's consolidated financial statements other than with respect to the updated disclosure requirements.

NOTE 2 – REVENUE

Revenue Recognition Policy

The Company exercises judgment and uses estimates in connection with determining the amounts of product and service revenues to be recognized in each accounting period.

The Company derives revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software and service offerings. The majority of the Company's product sales consist of hardware appliances with embedded software that are essential to providing customers the intended functionality of the solutions. The Company also sells software offerings decoupled from the underlying hardware and software solutions to provide customers with enhanced functionality.

The Company accounts for revenue once a legally enforceable contract with a customer has been approved by the parties and the related promises to transfer products or services have been identified. A contract is defined by the Company as an arrangement with commercial substance identifying payment terms, each party’s rights and obligations regarding the products or services to be transferred and the amount the Company deems probable of collection. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. Revenue is recognized when control of the products or services are transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for products and services.

Product revenue is typically recognized upon shipment, provided a legally enforceable contract exists, control has passed to the customer, and in the case of software products, when the customer has the rights and ability to access the software; and collection of the related receivable is probable. If any significant obligations to the customer remain post-delivery, typically involving obligations relating to installation and acceptance by the customer, revenue recognition is deferred until such

9

obligations have been fulfilled. The Company's service offerings include installation, integration, extended warranty and maintenance services, post-contract customer support, stand-ready software-as-a-service (SAAS) and other professional services including consulting and training. The Company generally provides software and/or hardware support as part of product sales. Revenue related to the initial bundled software and hardware support is recognized ratably over the support period. In addition, customers can elect to purchase extended support agreements for periods after the initial software/hardware warranty expiration. Support services generally include rights to unspecified upgrades (when and if available), telephone and internet-based support, updates, bug fixes and hardware repair and replacement. Consulting services are recognized upon delivery or completion of performance depending on the terms of the underlying contract. Reimbursements of out-of-pocket expenditures incurred in connection with providing consulting services are included in services revenue, with the offsetting expense recorded in cost of service revenue. Training services include on-site and classroom training. Training revenues are recognized upon delivery of the training.

Generally, the Company's contracts are accounted for individually. However, when contracts are closely interrelated and dependent on each other, it may be necessary to account for two or more contracts as one to reflect the substance of the group of contracts.

Bundled arrangements are concurrent customer purchases of a combination of the Company's product and service offerings that may be delivered at various points in time. The Company allocates the transaction price among the performance obligations in an amount that depicts the relative standalone selling prices (SSP) of each obligation. Judgment is required to determine the SSP for each distinct performance obligation. The Company uses a range of amounts to estimate SSP when it sells each of the products and services separately based on the element’s historical pricing. The Company also considers its overall pricing objectives and practices across different sales channels and geographies, and market conditions. Generally, the Company has established SSP for a majority of its service elements based on historical standalone sales. In certain instances, the Company has established SSP for services based upon an estimate of profitability and the underlying cost to fulfill those services. Further, for certain service engagements, the Company considers quoted prices as part of multi-element arrangements of those engagements as a basis for establishing SSP. SSP has been established for product elements as the average or median selling price the element was recently sold for, whether sold alone or sold as part of a multiple element transaction. The Company reviews sales of the product elements on a quarterly basis and updates, when appropriate, its SSP for such elements to ensure that it reflects recent pricing experience. The Company's products are distributed through its direct sales force and indirect distribution channels through alliances with resellers and distributors. Revenue arrangements with resellers and distributors are recognized on a sell-in basis; that is, when control of the product transfers to the reseller or distributor. The Company records consideration given to a customer as a reduction of revenue to the extent they have recorded revenue from the customer. With limited exceptions, the Company's return policy does not allow product returns for a refund. Returns have been insignificant to date. In addition, the Company has a history of successfully collecting receivables from its resellers and distributors.

During the six months ended September 30, 2020, the Company recognized revenue of $165.7 million related to the Company's deferred revenue balance reported at March 31, 2020.

Performance Obligations

Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. The transaction price is allocated among performance obligations in bundled contracts in an amount that depicts the relative standalone selling prices of each obligation.

For contracts involving distinct hardware and software licenses, the performance obligations are satisfied at a point in time when control is transferred to the customer. For standalone maintenance and post-contract support (PCS) the performance obligation is satisfied ratably over the contract term as a stand-ready obligation. For consulting and training services, the performance obligation may be satisfied over the contract term as a stand-ready obligation, satisfied over a period of time as those services are delivered, or satisfied at the completion of the service when control has transferred, or the services have expired unused.

Payments for hardware, software licenses, one-year maintenance, PCS and consulting services, are typically due up front with payment terms of 30 to 90 days. However, the Company does have contracts pursuant to which billings occur ratably over a period of years following the transfer of control for the contracted performance obligations. Payments on multi-year maintenance, PCS and consulting services are typically due in annual installments over the contract term. The Company did not have any material variable consideration such as obligations for returns, refunds or warranties at September 30, 2020.

At September 30, 2020, the Company had total deferred revenue of $335.8 million, which represents the aggregate total contract price allocated to undelivered performance obligations. The Company expects to recognize $236.2 million, or 70%, of this revenue during the next 12 months, and expects to recognize the remaining $99.6 million, or 30%, of this revenue thereafter.

10

Because of NetScout's revenue recognition policies, there are circumstances for which the Company does not recognize revenue relating to sales transactions that have been billed, and the related account receivable has not been collected. While the receivable represents an enforceable obligation, for balance sheet presentation purposes, the Company has not recognized the deferred revenue, or the related account receivable and no amounts appear in the consolidated balance sheets for such transactions because control of the underlying deliverable has not transferred. The aggregate amount of unrecognized accounts receivable and deferred revenue was $5.7 million and $11.1 million at September 30, 2020 and March 31, 2020, respectively.

NetScout expects that the amount of billed and unbilled deferred revenue will change from quarter to quarter for several reasons, including the specific timing, duration and size of large customer support and service agreements, varying billing cycles of such agreements, the specific timing of customer renewals, and foreign currency fluctuations. The Company did not have any significant financing components, or variable consideration or performance obligations satisfied in a prior period recognized during the six months ended September 30, 2020.

Contract Balances

The Company may receive payments from customers based on a billing schedule as established by the Company's contracts. Contract assets relate to performance obligations where control has transferred to the customer in advance of scheduled billings. The Company records unbilled accounts receivable representing the right to consideration in exchange for goods or services that have been transferred to a customer conditional on the passage of time. Deferred revenue relates to payments received in advance of performance under the contract.

Costs to Obtain Contracts

The Company has determined that the only significant incremental costs incurred to obtain contracts with customers within the scope of Topic 606 are sales commissions paid to its employees. Sales commissions are recorded as an asset and amortized to expense ratably over the remaining performance periods of the related contracts with remaining performance obligations. The Company expenses costs as incurred for sales commissions when the amortization period would have been one year or less.

At September 30, 2020, the consolidated balance sheet included $7.5 million in assets related to sales commissions to be expensed in future periods. A balance of $4.5 million was included in prepaid expenses and other current assets, and a balance of $3.0 million was included in other assets in the Company's consolidated balance sheet at September 30, 2020. At March 31, 2020, the consolidated balance sheet included $7.2 million in assets related to sales commissions to be expensed in future periods. A balance of $3.9 million was included in prepaid expenses and other current assets, and a balance of $3.3 million was included in other assets in the Company's consolidated balance sheet at March 31, 2020.

During the three and six months ended September 30, 2020 and 2019, respectively, the Company recognized $1.5 million, $1.6 million, $3.1 million and $3.2 million of amortization related to this sales commission asset, which is included in the sales and marketing expense line in the Company's consolidated statements of operations.

Allowance for Doubtful Accounts

The Company continually monitors collections from its customers. The Company evaluates the collectability of its accounts receivable and determines the appropriate allowance for doubtful accounts based on a combination of factors, including but not limited to, analysis of the aging schedules, past due balances, historical collection experience and prevailing economic conditions.

The following table summarizes the activity in the allowance for doubtful accounts (in thousands):

Balance at March 31, 2020	$	1,350
Provision for allowance for doubtful accounts	25
Recoveries and other adjustments	(533)
Write off charged against the allowance for doubtful accounts	(60)
Balance at September 30, 2020	$	782

NOTE 3 – CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

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

11

At September 30, 2020, the Company had one direct customer who 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. At March 31, 2020, the Company had no direct customers or indirect channel partners which accounted for more than 10% of the accounts receivable balance.

During the three and six months ended September 30, 2020 and 2019, no direct customers or indirect channel partners accounted for more than 10% of the Company's total revenue.

Historically, the Company has not experienced any significant failure of its customers' ability 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.

NOTE 4 – SHARE-BASED COMPENSATION

The following is a summary of share-based compensation expense including restricted stock units granted pursuant to the Company's 2007 Equity Incentive Plan, as amended (Amended 2007 Plan), and 2019 Equity Incentive Plan (2019 Plan) and employee stock purchases made under the Company's 2011 Employee Stock Purchase Plan, as amended, (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Cost of product revenue	$	344	$	345	$	589	$	612
Cost of service revenue	1,810		1,842		3,160		3,309
Research and development	4,935		4,820		8,716		8,639
Sales and marketing	5,357		5,288		9,349		9,423
General and administrative	3,290		3,562		6,018		6,617
	$	15,736	$	15,857	$	27,832	$	28,600

On September 12, 2019, the Company’s stockholders approved the 2019 Plan, which replaced the Company’s Amended 2007 Plan. The 2019 Plan permits the granting of incentive and nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, and other stock awards, collectively referred to as "share-based awards." On September 10, 2020, the Company's stockholders approved an amendment and restatement of the 2019 Equity Incentive Plan (the Amended 2019 Plan) to increase the number of shares of shares authorized for issuance under the Amended 2019 Plan by 4,700,000. A total of 11,494,651 shares are reserved for issuance under the Amended 2019 Plan. Periodically, the Company grants share-based awards to employees, officers, and directors of the Company and its subsidiaries. The Company accounts for these share-based awards in accordance with GAAP, which requires the measurement and recognition of compensation expense based on estimated fair values for all share-based payment awards made to its employees and directors. Share-based award grants are generally measured at fair value on the date of grant based on the number of shares granted and the quoted price of the Company’s common stock. Such value is recognized as a cost of revenue or an operating expense over the corresponding vesting period.

Employee Stock Purchase Plan – The Company maintains the ESPP for all eligible employees as described in the Company's Annual Report on Form 10-K for the year ended March 31, 2020. 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 1st through August 31st and from September 1st through the last day of February each year. During the six months ended September 30, 2020, employees purchased 279,812 shares under the ESPP and the value per share was $23.14.

NOTE 5 – CASH, CASH EQUIVALENTS, RESTRICTED CASH 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 at September 30, 2020 and U.S. government and municipal obligations, commercial paper, money market instruments and cash maintained with various financial institutions at March 31, 2020.

12

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):

	September 30, 2020		March 31, 2020		September 30, 2019		March 31, 2019
Cash and cash equivalents	$	415,719	$	338,489	$	245,064	$	409,632
Restricted cash	748		1,748		1,000		188
Total cash, cash equivalents and restricted cash	$	416,467	$	340,237	$	246,064	$	409,820

The Company's restricted cash includes cash balances which are legally or contractually restricted. The Company's restricted cash is included within prepaid and other current assets and consists of amounts related to holdbacks associated with prior acquisitions.

Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	3,585	$	29	$	3,614
Commercial paper	6,595		—		6,595
Corporate bonds	1,908		10		1,918
Total short-term marketable securities	12,088		39		12,127
Total long-term marketable securities	—		—		—
Total marketable securities	$	12,088	$	39	$	12,127

The following is a summary of marketable securities held by NetScout at March 31, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	28,621	$	107	$	28,728
Commercial paper	14,644		—		14,644
Corporate bonds	4,587		10		4,597
Total short-term marketable securities	47,852		117		47,969
U.S. government and municipal obligations	2,562		51		2,613
Total long-term marketable securities	2,562		51		2,613
Total marketable securities	$	50,414	$	168	$	50,582

Contractual maturities of the Company's marketable securities held at September 30, 2020 and March 31, 2020 were as follows (in thousands):

	September 30, 2020		March 31, 2020
Available-for-sale securities:
Due in 1 year or less	$	12,127	$	47,969
Due after 1 year through 5 years	—		2,613
	$	12,127	$	50,582

13

NOTE 6 – 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 September 30, 2020 and March 31, 2020 (in thousands):

	Fair Value Measurements at
	September 30, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	415,719	$	—	$	—	$	415,719
U.S. government and municipal obligations	2,576		1,038		—		3,614
Commercial paper	—		6,595		—		6,595
Corporate bonds	1,918		—		—		1,918
Derivative financial instruments	—		151		—		151
	$	420,213	$	7,784	$	—	$	427,997
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(748)	$	(748)
	$	—	$	—	$	(748)	$	(748)

	Fair Value Measurements at
	March 31, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	338,489	$	—	$	—	$	338,489
U.S. government and municipal obligations	31,341		—		—		31,341
Commercial paper	—		14,644		—		14,644
Corporate bonds	4,597		—		—		4,597
	$	374,427	$	14,644	$	—	$	389,071
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(1,748)	$	(1,748)
Derivative financial instruments	—		(49)		—		(49)
	$	—	$	(49)	$	(1,748)	$	(1,797)

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 calculated using market observable data for similar but not identical instruments, or a discounted cash flow model using the contractual interest rate as compared to the underlying interest yield curve. 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. 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's Level 3 liabilities consists of contingent purchase considerations.

The Company had a contingent liability at September 30, 2020 and March 31, 2020 for $0.7 million related to the acquisition of Gigavation Incorporated (Gigavation) in February 2020. The contingent purchase consideration represents

14

amounts deposited into an escrow account which was established to cover damages NetScout may suffer related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. The $0.7 million of contingent purchase consideration was included in accrued other in the Company’s consolidated balance sheet at September 30, 2020 and March 31, 2020. Except to the extent that valid indemnification claims are made prior to such time, the $0.7 million will be paid to the seller in February 2021.

The Company had a contingent liability at March 31, 2020 related to the acquisition of Eastwind Networks, Inc. (Eastwind) in April 2019. The contingent purchase consideration represented amounts deposited into an escrow account which was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. The contingent purchase consideration of $1.0 million was included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The contingent purchase consideration of $1.0 million was paid to the seller in April 2020.

The following table sets forth a reconciliation of changes in the fair value of the Company's Level 3 financial liabilities for the six months ended September 30, 2020 (in thousands):

	Contingent Purchase Consideration
Balance at March 31, 2020	$	(1,748)
Payments made	1,000
Balance at September 30, 2020	$	(748)

NOTE 7 – 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):

	September 30, 2020		March 31, 2020
Raw materials	$	16,267	$	15,311
Work in process	125		819
Finished goods	6,057		5,376
Deferred costs	3,774		721
	$	26,223	$	22,227

NOTE 8 - ACQUISITIONS & DIVESTITURES

Gigavation Acquisition

On February 5, 2020 (the Gigavation Closing Date), the Company acquired 100% of the common stock of Gigavation Incorporated, a cybersecurity company for $8.0 million. Gigavation's solutions provide security to device communication protocols, end point protection and security analytics. The Gigavation technology and engineering talent have been integrated into our service assurance products in order to support the ongoing enhancement of that products portfolio.

Goodwill of $3.8 million was recognized for the excess purchase price over the fair value of the net assets acquired. Goodwill and intangible assets recorded as part of the acquisition are not deductible for tax purposes.

Eastwind Acquisition

    On April 3, 2019 (the Eastwind Closing Date), the Company completed the acquisition of certain assets and liabilities of Eastwind for $5.2 million. Eastwind's breach analytics cloud analyzes data to identify malicious activity, insider threats and data leakage.

    Goodwill of $1.0 million was recognized for the excess purchase price over the fair value of the net assets acquired. Goodwill and intangible assets recorded as part of the acquisition are deductible for tax purposes.

HNT Tools Business Divestiture

    On September 14, 2018 (the HNT Divestiture Date), the Company divested its Handheld Network Tools (HNT) business. As part of the divestiture, the Company recorded contingent consideration which represents potential future earnout payments of up to $4.0 million over two years that are contingent on the achievement of certain milestones by the HNT business. The

15

Company recorded a $0.5 million change in the fair value of the contingent consideration, which is included in other income (expense), net within the Company’s consolidated statements of operations for the six months ended September 30, 2019. The fair value of the contingent consideration was $0 at September 30, 2020 and March 31, 2020.

    In connection with the divestiture, the Company entered into a transitional services agreement with the buyer to provide certain services for a period of up to eighteen months. The transitional services agreement ended in fiscal year 2020. Income associated with the transitional services agreement for the three and six months ended September 30, 2020 and 2019 was $0.1 million, $0.3 million, $0.1 million, and $1.2 million, respectively. Transitional services agreement income is included within other income (expense), net in the Company's consolidated statements of operations.

NOTE 9 – GOODWILL AND INTANGIBLE ASSETS

Goodwill

The Company assesses goodwill for impairment at the 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 Company completed its annual impairment test on January 31, 2020. During the fourth quarter of fiscal year 2020, the Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic to be a triggering event. As such, the Company performed a quantitative analysis as of March 31, 2020. The quantitative impairment test indicated goodwill was not impaired as of March 31, 2020.

Reporting units are determined based on the components of a Company's operating segments that constitute a business for which financial information is available and for which operating results are regularly reviewed by segment management. Through the first half of fiscal year 2020, the Company had two reporting units: (1) Service Assurance and (2) Security. As part of its continued integration efforts, effective during the third quarter of fiscal year 2020, the Company reorganized its business units. As a result of this change, the Company reduced the number of reporting units from two reporting units to one reporting unit. The former Service Assurance and Security reporting units were combined as result of organizational changes made to fully integrate the resources and assets of the Service Assurance and Security business units. The Company completed an assessment of any potential impairment for all reporting units immediately prior to and after the reporting unit change and determined that no impairment existed.

At September 30, 2020 and March 31, 2020, the carrying amount of goodwill was $1.7 billion. The change in the carrying amount of goodwill for the six months ended September 30, 2020 was 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 following table summarizes the changes in the carrying amount of goodwill for the six months ended September 30, 2020 as follows (in thousands):

Balance at March 31, 2020	$	1,725,680
Foreign currency translation impact	(7,085)
Balance at September 30, 2020	$	1,718,595

Intangible Assets

The net carrying amounts of intangible assets were $551.8 million and $582.2 million at September 30, 2020 and March 31, 2020, 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 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. The Company completed its annual impairment test on January 31, 2020. During the fourth quarter of fiscal year 2020, the Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic and concluded that it was not more likely than not that the trade name was impaired and therefore a quantitative Step 1 assessment was not performed as of March 31, 2020.

16

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at September 30, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	251,824	$	(203,010)	$	48,814
Customer relationships	775,018		(305,680)		469,338
Distributor relationships and technology licenses	11,454		(7,233)		4,221
Definite-lived trademark and trade name	39,394		(28,960)		10,434
Core technology	7,192		(7,133)		59
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,461		(16,461)		—
Capitalized software	3,317		(3,255)		62
Other	1,208		(953)		255
	$	1,106,996	$	(573,813)	$	533,183

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	249,675	$	(191,876)	$	57,799
Customer relationships	767,366		(275,361)		492,005
Distributor relationships and technology licenses	6,785		(6,321)		464
Definite-lived trademark and trade name	39,059		(26,246)		12,813
Core technology	7,192		(7,074)		118
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,223		(16,223)		—
Capitalized software	3,317		(3,202)		115
Other	1,208		(943)		265
	$	1,091,953	$	(528,374)	$	563,579

Amortization included as cost of product revenue consists of amortization of developed technology, distributor relationships and technology licenses, core technology and software. Amortization included as operating expense consists of all other intangible assets. The following table provides a summary of amortization expense for the three and six months ended September 30, 2020 and 2019, respectively (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Amortization of intangible assets included as:
Cost of product revenue	$	5,320	$	6,677	$	10,333	$	13,479
Operating expense	15,368		16,137		30,634		32,285
	$	20,688	$	22,814	$	40,967	$	45,764

17

The following is the expected future amortization expense at September 30, 2020 for the fiscal years ending March 31 (in thousands):

2021 (remaining six months)	$	40,544
2022	71,466
2023	63,731
2024	55,485
2025	48,421
Thereafter	253,536
	$	533,183

The weighted-average amortization period of developed technology and core technology is 11.2 years. The weighted-average amortization period for customer and distributor relationships is 15.9 years. The weighted-average amortization period for trademarks and trade names is 8.6 years. The weighted-average amortization period for capitalized software is 3.0 years. The weighted-average amortization period for amortizing all intangible assets is 14.6 years.

NOTE 10 – 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.

NetScout also periodically enters into forward contracts to manage exchange rate risks associated with certain third-party transactions and for which the Company does not elect hedge accounting treatment as there is no difference in the timing of gain or loss recognition on the hedging instrument and the hedged item.

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 September 30, 2020 and March 31, 2020 were as follows (in thousands):

	Notional Amounts (a)				Prepaid Expenses and Other Current Assets				Accrued Other
	September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020
Derivatives Designated as Hedging Instruments:
Forward contracts	$	3,516	$	1,722	$	105	$	—	$	—	$	49
Derivatives Not Designated as Hedging Instruments:
Forward contracts	6,566		—		46		—		—		—
					$	151	$	—	$	—	$	49

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

18

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	236	$	(27)	Research and development	$	(22)	$	(4)
					Sales and marketing	(115)		28
	$	236	$	(27)		$	(137)	$	24

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	247	$	(101)	Research and development	$	(13)	$	(8)
					Sales and marketing	(81)		78
	$	247	$	(101)		$	(94)	$	70

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

NOTE 11 – LONG-TERM DEBT

On January 16, 2018, the Company amended and expanded its existing credit agreement (Amended Credit Agreement) with a syndicate of lenders by and among: the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and

19

collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Fifth Third Bank, Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Amended Credit Agreement provides for a five-year, $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. The Company may elect to use the new credit facility for general corporate purposes or to finance the repurchase of up to twenty-five million shares of the Company's common stock under the Company's common stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. At September 30, 2020, $450 million was outstanding under the Amended Credit Agreement.

At the Company's election, revolving loans under the Amended Credit Agreement bear interest at either (a) an Alternate Base Rate per annum equal to the greatest of (1) JPMorgan's prime rate, (2) 0.50% in excess of the New York Federal Reserve Bank (NYFRB) rate, or (3) an adjusted one month LIBOR rate plus 1%; or (b) such adjusted LIBOR rate (for the interest period selected by the Company), in each case plus an applicable margin. For the period from the delivery of the Company's financial statements for the quarter ended June 30, 2020, until the Company has delivered financial statements for the quarter ended September 30, 2020, the applicable margin will be 1.50% per annum for LIBOR loans and 0.50% per annum for Alternate Base Rate loans, and thereafter the applicable margin will vary depending on the Company's leverage ratio, ranging from 1.00% per annum for Base Rate loans and 2.00% per annum for LIBOR loans if the Company's consolidated leverage ratio is greater than 3.50 to 1.00, down to 0.00% per annum for Alternate Base Rate loans and 1.00% per annum for LIBOR loans if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00.

On July 27, 2017, the U.K. Financial Conduct Authority (FCA) announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. The Company's Amended Credit Agreement provides for the Administrative Agent to determine if (i) adequate and reasonable means do not exist for ascertaining the LIBOR rate or (ii) the FCA or Government Authority having jurisdiction over the Administrative Agent has made a public statement identifying a specific date after which the LIBOR rate shall no longer be used for determining interest rates for loans and the Administrative Agent determines that (i) and (ii) above are unlikely to be temporary, then the Administrative Agent and the Company would agree to transition to an Alternate Base Rate borrowing as described above or amend the Credit Agreement to establish an alternate rate of interest to LIBOR that gives due consideration to the then prevailing market convention for determining a rate of interest for syndicated loans in the United States at such time.

The Company's consolidated leverage ratio is the ratio of its total funded debt compared to its consolidated adjusted EBITDA. Consolidated adjusted EBITDA includes certain adjustments, including, without limitation, adjustments relating to extraordinary, unusual or non-recurring charges, certain restructuring charges, non-cash charges, certain transaction costs and expenses and certain pro forma adjustments in connection with material acquisitions and dispositions, all as set forth in detail in the definition of consolidated adjusted EBITDA in the Amended Credit Agreement.

Commitment fees will accrue on the daily unused amount of the credit facility. For the period from the delivery of the Company's financial statements for the quarter ended June 30, 2020 until the Company has delivered financial statements for the quarter ended September 30, 2020, the commitment fee will be 0.25% per annum, and thereafter the commitment fee will vary depending on the Company's consolidated leverage ratio, ranging from 0.30% per annum if the Company's consolidated leverage ratio is greater than 2.75 to 1.00, down to 0.15% per annum if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00.

Letter of credit participation fees are payable to each lender on the amount of such lender’s letter of credit exposure, during the period from the closing date of the Amended Credit Agreement to but excluding the date which is the later of (i) the date on which such lender’s commitment terminates or (ii) the date on which such lender ceases to have any letter of credit exposure, at a rate per annum equal to the applicable margin for LIBOR loans. Additionally, the Company will pay a fronting fee to each issuing bank in amounts to be agreed to between the Company and the applicable issuing bank.

Interest on Alternate Base Rate loans is payable at the end of each calendar quarter. Interest on LIBOR loans is payable at the end of each interest rate period or at the end of each three-month interval within an interest rate period if the period is longer than three months. The Company may also prepay loans under the Amended 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 and other obligations under the credit facility are (a) guaranteed by each of the Company's wholly owned material domestic restricted subsidiaries, subject to certain exceptions, and (b) are secured by substantially all of the assets of the Company and the subsidiary guarantors, including a pledge of all the capital stock of material subsidiaries held directly by the Company and the subsidiary guarantors (which pledge, in the case of any foreign subsidiary, is limited to 65% of the voting

20

stock), subject to certain customary exceptions and limitations. The Amended Credit Agreement generally prohibits any other liens on the assets of the Company and its restricted subsidiaries, subject to certain exceptions as described in the Amended Credit Agreement.

The Amended Credit Agreement contains certain covenants applicable to the Company and its restricted subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes, dividends and distributions, investments (including acquisitions), transactions with affiliates, asset sales, including sale-leaseback transactions, speculative hedge agreements, payment of junior financing, 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. These covenants and limitations are more fully described in the Amended Credit Agreement. At September 30, 2020, the Company was in compliance with all of these covenants.

The Amended Credit Agreement provides that events of default will exist in certain circumstances, including failure to make payment of principal or interest on the loans when required, failure to perform certain obligations under the Amended Credit Agreement and related documents, defaults under certain other indebtedness, certain insolvency events, certain events arising under ERISA, a change of control and certain other events. Upon an event of default, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may, terminate the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents.

In connection with the Company's Amended Credit Agreement described above, the Company terminated its previous term loan dated as of July 14, 2015, by and among the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Company has capitalized debt issuance costs totaling $12.2 million at September 30, 2020, which are being amortized over the life of the revolving credit facility. The unamortized balance was $4.0 million as of September 30, 2020. The balance of $1.7 million was included as prepaid expenses and other current assets and a balance of $2.3 million was included as other assets in the Company's consolidated balance sheet.

NOTE 12 – RESTRUCTURING CHARGES

During the second quarter of the fiscal year ended March 31, 2019, the Company implemented a voluntary separation program (VSP) for employees who met certain age and service requirements to reduce overall headcount resulting in a total restructuring charge for the program of $17.3 million. As a result of the related workforce reduction, one hundred fifty-five employees voluntarily terminated their employment with the Company. As a result of the related workforce reduction, during the six months ended September 30, 2019, the Company recorded restructuring charges totaling $0.1 million related to one-time termination benefits for employees who voluntarily terminated their employment with the Company during the period. The one-time termination benefits were paid in full by the end of the first quarter of the fiscal year ended March 31, 2020.

During the fiscal year ended March 31, 2020, the Company approved two restructuring plans. During the second quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions resulting in a total restructuring charge for the program of $0.5 million. As a result of the workforce reduction, during the six months ended September 30, 2019, the Company recorded a restructuring charge totaling $0.2 million related to one-time termination benefits. The one-time termination benefits were paid in full during the first quarter of the fiscal year ending March 31, 2021. During the fourth quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions. As a result of the workforce reduction, the Company recorded a restructuring charge totaling $2.1 million during the fiscal year ended March 31, 2020 and an additional $0.1 million during the six months ended September 30, 2020. The one-time termination benefits were paid in full by the end of the second quarter of the fiscal year ending March 31, 2021.

21

The following table provides a summary of the activity related to the restructuring plans and the related restructuring liabilities (in thousands):

	Q2FY20 Plan		Q4FY20 Plan
	Employee-Related		Employee-Related		Total
Balance at March 31, 2020	$	3	$	1,717	$	1,720
Restructuring charges to operations	—		62		62
Cash payments	(3)		(1,860)		(1,863)
Other adjustments	—		81		81
Balance at September 30, 2020	$	—	$	—	$	—

NOTE 13 - LEASES

The Company determines if an arrangement is a lease at inception. ROU assets represent the Company’s right to use an underlying asset for the duration of the lease term. Lease liabilities represent the Company’s contractual obligation to make lease payments over the lease term. ROU assets are recorded and recognized at commencement for the lease liability amount, plus initial direct costs incurred less lease incentives received. Lease liabilities are recorded at the present value of future lease payments over the lease term at commencement. The discount rate used is generally the Company’s estimated incremental borrowing rate unless the lessor’s implicit rate is readily determinable. Incremental borrowing rates are calculated periodically to estimate the rate the Company would pay to borrow the funds necessary to obtain an asset of similar value over a similar term. Lease expenses relating to operating leases are recognized on a straight-line basis over the lease term.

The Company has operating leases for administrative, research and development, sales and marketing and manufacturing facilities and equipment under various non-cancelable lease agreements. The Company’s leases have remaining lease terms ranging from 1 year to 11 years. The Company’s lease terms may include options to extend or terminate the lease where it is reasonably certain that the Company will exercise those options. The Company considers several economic factors when making this determination, including but not limited to, the significance of leasehold improvements incurred in the office space, the difficulty in replacing the asset, underlying contractual obligations, or specific characteristics unique to a particular lease. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Most of the Company’s lease agreements contain variable payments, primarily for common area maintenance (CAM), which are expensed as incurred and not included in the measurement of the ROU assets and lease liabilities.

The components of operating lease cost for the three and six months ended September 30, 2020 and 2019 were as follows (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Lease cost under long-term operating leases	$	3,263	$	3,276	$	6,525	$	6,521
Lease cost under short-term operating leases	1,567		897		2,380		1,749
Variable lease cost under short-term and long-term operating leases	1,068		1,063		1,950		2,275
Total operating lease cost	$	5,898	$	5,236	$	10,855	$	10,545

The table below presents supplemental cash flow information related to leases during the six months ended September 30, 2020 and 2019 (in thousands):

	September 30, 2020		September 30, 2019
Right-of-use assets obtained in exchange for new operating lease liabilities	$	1,794	$	2,049

22

At September 30, 2020 and March 31, 2020, the weighted average remaining lease term in years and weighted average discount rate were as follows:

	September 30, 2020		March 31, 2020
Weighted average remaining lease term in years - operating leases	8.09		8.59
Weighted average discount rate - operating leases	4.1	%	4.1	%

Future minimum payments under non-cancellable leases at September 30, 2020 are as follows (in thousands):

Year ending March 31:
2021 (remaining six months)	$	6,141
2022	14,507
2023	12,339
2024	10,216
2025	10,057
Thereafter	38,364
Total lease payments	$	91,624
Less imputed interest	(13,626)
Present value of lease liabilities	$	77,998

NOTE 14 – COMMITMENTS AND CONTINGENCIES

Acquisition related - The Company had a contingent liability at September 30, 2020 for $0.7 million related to the acquisition of Gigavation in February 2020 for which an escrow account was established to cover damages NetScout may suffer related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. Except to the extent that valid indemnification claims are made prior to such time, the $0.7 million will be paid to the seller in February 2021. The contingent purchase consideration of $0.7 million was included as accrued other in the Company's consolidated balance sheet at September 30, 2020 and March 31, 2020.

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 material adverse effect on the Company’s financial condition, results of operations or cash flows.

As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against NetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’s Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. NetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’s patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. Following the entry of final judgment, on June 12, 2019, NetScout filed its Notice of Appeal. On July 14, 2020, the Court of Appeals for the Federal Circuit issued a decision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. NetScout continues to avail itself of its legal options. NetScout has concluded that the risk of loss associated with the post-suit damages award is "probable" in accounting terms, regardless of the options NetScout may pursue, and that the risk of loss associated with pre-suit damages is now remote. Accounting rules require NetScout to provide an estimate for the range of potential liability. NetScout currently estimates that the range of liability is the sum of post-suit damages, plus pre- and post-judgment interest amounts and royalties owed on post-trial sales of the accused G10 and GeoBlade products. Any potential enhancement is not reasonably estimable but is likely within the range of $0 to $2,800,000.

23

Other Contingent Liability - During fiscal year 2020, one of the Company's subsidiaries, located in the United Kingdom (UK), determined that value added tax (VAT) was not properly applied to certain supplies of service to the UK. The Company filed a blank disclosure with HM Revenue & Customs (HMRC) notifying HMRC of these application differences, and subsequently filed a voluntary disclosure agreement (VDA). The VDA covered the period of March 1, 2016 through February 29, 2020. The penalties associated with the application differences can range from 0%-30% of the underpayment and are based on objective and subjective determinations to be made by HMRC. At March 31, 2020 and September 30, 2020 the Company had accrued the penalties that it believes are probable and estimable of assessment by HMRC. A majority of the difference in the Company's application of the VAT rules relates to services for which the subsidiary did not collect VAT from its customers and for which customers would have been eligible to reclaim under the UK VAT regime. Based on these facts, the Company currently believes that it is probable that it will be required to settle these amounts separately with its customers and HMRC; hence, the Company has recorded a liability, which is included as accrued other in the Company's consolidated balance sheet and an asset, which is included in prepaid expenses and other current assets in the Company's consolidated balance sheet at September 30, 2020 for approximately $6.3 million, respectively.

NOTE 15 – PENSION BENEFIT PLANS

Certain of the Company's non-U.S. employees participate in noncontributory defined benefit pension plans. None of the Company's employees in the U.S. participate in any noncontributory defined benefit pension plans. In general, these plans are funded based on considerations relating to legal requirements, underlying asset returns, the plan's funded status, the anticipated deductibility of the contribution, local practices, market conditions, interest rates and other factors.

The following sets forth the components of the Company's net periodic pension cost of the noncontributory defined benefit pension plans for the three and six months ended September 30, 2020 and 2019 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Service cost	$	52	$	45	$	104	$	86
Interest cost	93		106		186		202
Net periodic pension cost	$	145	$	151	$	290	$	288

Expected Contributions

During the six months ended September 30, 2020, the Company made contributions of $0.2 million to its defined benefit pension plans. During the fiscal year ending March 31, 2021, the Company's cash contribution requirements for its defined benefit pension plans are expected to be less than $1.0 million. As a majority of the participants within the Company's plans are all active employees, the benefit payments are not expected to be material in the foreseeable future.

NOTE 16 – TREASURY STOCK

On October 24, 2017, the Company’s Board of Directors approved a share repurchase program that enables the Company to repurchase up to twenty-five million shares of its common stock. This new program became effective when the Company’s previously disclosed twenty million share repurchase program was completed. The Company is not obligated to acquire any specific amount of common stock within any particular timeframe as a result of this new share repurchase program. 

Through September 30, 2020, the Company has repurchased 17,756,569 shares for $468.7 million in the open market under the twenty-five million share repurchase program. At September 30, 2020, 7,243,431 shares of common stock remained available to be purchased under the current repurchase program. There were no share repurchases during the six months ended September 30, 2020. The Company repurchased 4,160,836 shares for $100.0 million under the twenty-five million share repurchase program during the six months ended September 30, 2019.

In connection with the delivery of shares of the Company's common stock upon vesting of restricted stock units, the Company withheld 481,739 shares and 500,093 shares at a cost of $12.6 million and $11.4 million, respectively, related to minimum statutory tax withholding requirements on these restricted stock units during the six months ended September 30, 2020 and 2019, respectively. These withholding transactions do not fall under the repurchase program described above, and therefore do not reduce the number of shares that are available for repurchase under that program.

24

NOTE 17 – NET LOSS PER SHARE

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Numerator:
Net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Denominator:
Denominator for basic net loss per share - weighted average common shares outstanding	73,058		75,687		72,682		76,490
Dilutive common equivalent shares:
Weighted average restricted stock units	—		—		—		—
Denominator for diluted net loss per share - weighted average shares outstanding	73,058		75,687		72,682		76,490
Net loss per share:
Basic net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Diluted net loss per share	(0.05)		(0.23)		(0.29)		(0.61)

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

	Three Months Ended		Six Months Ended
	September 30,		September 30,
	2020	2019	2020	2019
Restricted stock units	536	624	839	897

Basic net loss per share is calculated by dividing net loss 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 net loss per share is calculated by dividing net loss 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 and unrecognized compensation expense as additional proceeds. As the Company incurred a net loss during the three and six months ended September 30, 2020 and 2019, all outstanding restricted stock units have an anti-dilutive effect and are therefore excluded from the computation of diluted weighted average shares outstanding.

NOTE 18 – INCOME TAXES

Generally, the Company's effective tax rate differs from the statutory tax rate due to state income taxes, foreign withholding taxes, and US taxation on foreign earnings, which are partially offset by research and development tax credits, foreign tax credits and the Foreign Derived Intangible Income deduction.

The Company's effective income tax rates were 1,057.4% and 60.1% for the three months ended September 30, 2020 and 2019, respectively. The effective tax rate for the three months ended September 30, 2020 differed from the effective tax rate for the three months ended September 30, 2019, primarily due to generating a significant pre-tax loss in the three months ended September 30, 2019 when compared to the pre-tax income generated during the three months ended September 30, 2020.

The Company's effective income tax rates were 11.8% and 17.7% for the six months ended September 30, 2020 and 2019, respectively. The effective tax rate for the six months ended September 30, 2020 differed from the effective tax rate for the six months ended September 30, 2019, primarily due to a significant discrete tax expense related to elections made to treat several of the Company's foreign subsidiaries as U.S. branches for federal income tax purposes in the six months ended September 30, 2019. As a result, the Company recorded additional tax expense for the three and six months ended September 30, 2019 due to establishing new U.S. net deferred tax liabilities resulting from the differences between the GAAP basis and the U.S. federal tax basis of the existing assets and liabilities of those foreign subsidiaries.

25

NOTE 19 – SEGMENT AND GEOGRAPHIC INFORMATION

The Company reports revenues and income under one reportable segment.

The Company manages its business in the following geographic areas: United States, Europe, Asia and the rest of the world. The Company's policies mandate compliance with economic sanctions and the export controls.

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
United States	$	120,027	$	139,544	$	227,350	$	246,647
Europe	37,990		33,901		72,748		65,210
Asia	13,878		13,138		27,574		25,690
Rest of the world	33,444		29,838		61,482		64,898
	$	205,339	$	216,421	$	389,154	$	402,445

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. Further, the Company determines the geography of its sales after considering where the contract originated. 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.

26

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

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with the condensed consolidated financial statements and notes thereto included elsewhere in this Quarterly Report and in our Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the Securities and Exchange Commission. This discussion contains forward-looking statements that involve risks and uncertainties. When reviewing the discussion below, you should keep in mind the substantial risks and uncertainties that could impact our business. In particular, we encourage you to review the risks and uncertainties described in Part I, Item 1A "Risk Factors" in our Annual Report on Form 10-K for the fiscal year ended March 31, 2020. These risks and uncertainties could cause actual results to differ significantly from those projected in forward-looking statements contained in this report or implied by past results and trends. Forward-looking statements are statements that attempt to forecast or anticipate future developments in our business, financial condition or results of operations. See the section titled "Cautionary Statement Concerning Forward-Looking Statements" that appears at the beginning of this Quarterly Report. These statements, like all statements in this report, speak only as of the date of this Quarterly Report (unless another date is indicated), and, except as required by law, we undertake no obligation to update or revise these statements in light of future developments.

Overview

We are an industry leader with over 35 years of experience in providing service assurance and security solutions that are used by customers worldwide to protect their digital business services against disruption. Service providers and enterprises, including local, state and federal government agencies, rely on our solutions to achieve the visibility necessary to optimize network performance, ensure the delivery of high-quality, mission-critical applications and services, gain timely insight into the end user experience and protect their networks from attack. With our offerings, customers can quickly, efficiently and effectively identify and resolve issues that result in downtime, interruptions to services, poor service quality or compromised data, thereby driving compelling returns on their investments in their networks and broader technology initiatives. Some of the more significant technology trends and catalysts for our business include the evolution of customers' digital transformation initiatives, the rapidly evolving security threat landscape, business intelligence and analytics advancements, and the 5G evolution in both the service provider and enterprise verticals.

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, and our ability to achieve expense reductions and make improvements in a highly competitive industry.

COVID-19 Impact

In March 2020, the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide. The pandemic and these containment and mitigation measures have led to adverse impacts on the U.S. and global economies. Due to the critical nature of our products and services, we are considered critical under State and Federal guidelines. While we have begun a phased reopening at some of our facilities, we remain focused on protecting the health and well-being of our employees and continue to maintain work from home policies for a vast majority of our employees where feasible.

We are closely monitoring the impact of the COVID-19 pandemic on all aspects of our business, including how it has impacted and will continue to impact our customers, employees, supply chain, and distribution network. Our business and operations have proven to be largely resilient as we navigate the global pandemic and macroeconomic uncertainty. However, we are not immune from the impacts of the COVID-19 global pandemic and resulting challenging macro-economic environment that is causing elongated purchasing cycles and we expect our fiscal year financial results to be affected given these uncertainties. Despite this impact, we are committed to managing our costs to attempt to mitigate the impact of a revenue decline to deliver improved GAAP earnings per share compared with the same period last year.

We believe our current cash reserves leave us well-positioned to manage our business through this crisis as it continues to unfold. We expect net cash provided by operating activities combined with cash, cash equivalents and marketable securities and borrowing availability under our revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirements over at least the next twelve months. We are taking actions to reduce costs and increase productivity throughout our company. This includes limiting discretionary spending and reducing hiring activities. In addition, based on covenant levels at September 30, 2020, we have an incremental $317 million available to us under our $1.0 billion revolving credit facility.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the CARES Act) was enacted. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social

27

security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. We have elected to defer the employer-paid portion of social security taxes. As of September 30, 2020, we had deferred $7.4 million of employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022.

The extent of the impact of the COVID-19 pandemic on our operational and financial performance will depend on certain developments, including the duration and spread of the outbreak, its impact on our customers and suppliers and the range of governmental and community reactions to the pandemic, which are uncertain and cannot be fully predicted at this time. We will continue to proactively respond to the situation and may take further actions that alter our business operations as may be required by governmental authorities, or that we determine are in the best interests of our stakeholders.

Results Overview

Total revenue for the six months ended September 30, 2020 was impacted by a decrease in revenue from our network performance management offerings in both the service provider and enterprise verticals, partially offset by an increase in our enterprise vertical for DDoS offerings.

Our gross profit percentage decreased one percentage point during the six months ended September 30, 2020 as compared with the six months ended September 30, 2019.

Net loss for the six months ended September 30, 2020 was $21.1 million, as compared with a net loss for the six months ended September 30, 2019 of $46.8 million, a decrease of $25.7 million. The decrease in net loss was primarily due to a $13.1 million decrease in travel expenses primarily attributable to COVID-19 related restrictions, a $8.1 million decrease in expenses related to trade shows and other sales and marketing related events attributable to continued cost control and COVID-19 related restrictions, a $5.7 million decrease in interest expense, a $4.8 million decrease in amortization of intangible assets, and a $4.7 million decrease in inventory related charges. These decreases were partially offset by an $8.8 million increase in employee-related expenses largely due to an increase in variable incentive compensation.

At September 30, 2020, we had cash, cash equivalents and marketable securities (short-term and long-term) of $427.8 million. This represents an increase of $38.7 million from $389.1 million at March 31, 2020. This increase was primarily due to cash provided by operating activities of $56.6 million, partially offset by $12.6 million used for tax withholdings on restricted stock units, $5.8 million used for capital expenditures and $4.5 million used for purchases of intangible assets during the six months ended September 30, 2020.

Use of Non-GAAP Financial Measures

We supplement the United States 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 total revenue, non-GAAP gross profit, non-GAAP income from operations, non-GAAP operating margin, non-GAAP earnings before interest and other expense, income taxes, depreciation and amortization (EBITDA) from operations, non-GAAP net income, and non-GAAP net income per share (diluted). Non-GAAP revenue eliminates the GAAP effects of acquisitions by adding back revenue related to deferred revenue revaluation. Non-GAAP gross profit includes the aforementioned revenue adjustments and also removes expenses related to the amortization of acquired intangible assets, share-based compensation, and acquisition-related depreciation. Non-GAAP income from operations includes the aforementioned adjustments and also removes business development and integration expense, compensation for post-combination services, legal judgments expense, restructuring charges, and costs related to new accounting standard implementation, and adds back transitional service agreement income. Non-GAAP net income includes the foregoing adjustments related to non-GAAP income from operations, net of related income tax effects while removing transitional service agreement income and changes in contingent consideration. Non-GAAP EBITDA from operations includes the aforementioned items related to non-GAAP income from operations and also removes non-acquisition-related depreciation expense. 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, gross profit, operating profit, net income (loss) and diluted net income (loss) 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 our prospects for the future by providing a higher degree of transparency for certain financial

28

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 with 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, gross profit, income (loss) from operations, net income (loss) and net income (loss) per share on a GAAP and non-GAAP basis for the six months ended September 30, 2020 and 2019 (in thousands, except for per share amounts):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
GAAP revenue	$	205,339	$	216,421	$	389,154	$	402,445
Service deferred revenue fair value adjustment	1		48		3		96
Non-GAAP revenue	$	205,340	$	216,469	$	389,157	$	402,541
GAAP gross profit	$	146,439	$	157,289	$	277,274	$	288,570
Service deferred revenue fair value adjustment	1		48		3		96
Share-based compensation expense	2,154		2,187		3,749		3,921
Amortization of acquired intangible assets	4,765		6,225		9,500		12,455
Acquisition related depreciation expense	5		6		11		19
Non-GAAP gross profit	$	153,364	$	165,755	$	290,537	$	305,061
GAAP income (loss) from operations	$	3,779	$	(7,295)	$	(10,708)	$	(31,743)
Service deferred revenue fair value adjustment	1		48		3		96
Share-based compensation expense	15,736		15,857		27,832		28,600
Amortization of acquired intangible assets	20,128		22,357		40,124		44,730
Business development and integration expense	—		39		16		18
New standard implementation expense	—		—		—		9
Compensation for post-combination services	63		135		127		328
Restructuring charges	(31)		150		62		273
Acquisition related depreciation expense	60		69		121		190
Transitional service agreement income	101		275		101		1,184
Legal judgments expense	—		—		2,804		—
Non-GAAP income from operations	$	39,837	$	31,635	$	60,482	$	43,685

29

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
GAAP net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Service deferred revenue fair value adjustment	1		48		3		96
Share-based compensation expense	15,736		15,857		27,832		28,600
Amortization of acquired intangible assets	20,128		22,357		40,124		44,730
Business development and integration expense	—		39		16		18
New standard implementation expense	—		—		—		9
Compensation for post-combination services	63		135		127		328
Restructuring charges	(31)		150		62		273
Acquisition-related depreciation expense	60		69		121		190
Change in contingent consideration	—		(6)		—		517
Legal judgments expense	—		—		2,804		—
Income tax adjustments	(4,027)		181		(9,523)		(994)
Non-GAAP net income	$	28,244	$	21,358	$	40,460	$	26,952
GAAP diluted net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Per share impact of non-GAAP adjustments identified above	0.43		0.51		0.84		0.96
Non-GAAP diluted net income per share	$	0.38	$	0.28	$	0.55	$	0.35
GAAP income (loss) from operations	$	3,779	$	(7,295)	$	(10,708)	$	(31,743)
Previous adjustments to determine non-GAAP income from operations	36,058		38,930		71,190		75,428
Non-GAAP income from operations	39,837		31,635		60,482		43,685
Depreciation excluding acquisition related	6,955		6,905		12,907		13,746
Non-GAAP EBITDA from operations	$	46,792	$	38,540	$	73,389	$	57,431

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 GAAP 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:

•revenue recognition;

•share-based compensation;

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

•marketable securities.

30

Please refer to the critical accounting policies set forth in our Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the Securities and Exchange Commission (SEC) on May 20, 2020, for a description of all of our critical accounting policies.

Three Months Ended September 30, 2020 and 2019

Revenue

Product revenue consists of sales of our hardware products and licensing of our software products. Service revenue consists of customer support agreements, consulting, training and stand-ready software as a service offering. During the three months ended September 30, 2020 and 2019, no direct customer or indirect channel partner accounted for more than 10% of our total revenue.

	Three Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Revenue:
Product	$	91,979	45	%	$	102,775	47	%	$	(10,796)	(11)	%
Service	113,360		55		113,646		53		(286)		—	%
Total revenue	$	205,339	100	%	$	216,421	100	%	$	(11,082)	(5)	%

Product. The 11%, or $10.8 million, decrease in product revenue compared with the same period last year was primarily due to a decrease in revenue from network performance management offerings for enterprise customers due to lower revenue from the federal government sector, partially offset by an increase in revenue from distributed denial of service (DDoS) offerings.

Service. The $0.3 million decrease in service revenue compared to the same period last year was primarily driven by a decrease in post-contract services.

Total revenue by geography was as follows:

	Three Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
United States	$	120,027	58	%	$	139,544	64	%	$	(19,517)	(14)	%
International:
Europe	37,990		19		33,901		16		4,089		12	%
Asia	13,878		7		13,138		6		740		6	%
Rest of the world	33,444		16		29,838		14		3,606		12	%
Subtotal international	85,312		42		76,877		36		8,435		11	%
Total revenue	$	205,339	100	%	$	216,421	100	%	$	(11,082)	(5)	%

United States revenue decreased 14%, or $19.5 million, primarily due to a decrease in revenue from network performance management offerings, partially offset by an increase in revenue from DDoS offerings. The 11%, or $8.4 million, increase in international revenue compared with the same period last year was primarily driven by higher revenue from network performance management offerings.

Cost of Revenue and Gross Profit

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

31

	Three Months Ended										Change
	September 30,
	(Dollars in Thousands)
	2020					2019
				% of Revenue					% of Revenue		$		%
Cost of revenue
Product	$	26,977		13	%	$	29,368		14	%	$	(2,391)	(8)	%
Service	31,923			16		29,764			14		2,159		7	%
Total cost of revenue	$	58,900		29	%	$	59,132		28	%	$	(232)	—	%
Gross profit:
Product $	$	65,002		32	%	$	73,407		34	%	$	(8,405)	(11)	%
Product gross profit %	71		%			71		%
Service $	$	81,437		40	%	$	83,882		39	%	$	(2,445)	(3)	%
Service gross profit %	72		%			74		%
Total gross profit $	$	146,439				$	157,289				$	(10,850)	(7)	%
Total gross profit %	71		%			73		%

Product. The 8%, or $2.4 million, decrease in cost of product revenue was primarily due to a $4.9 million decrease in direct material costs as a result of the decrease in product revenue, a $2.2 million decrease in inventory obsolescence charges, a $1.3 million decrease in the amortization of intangible assets, and a $0.7 million decrease in employee-related expenses associated with the timing of certain projects. These decreases were partially offset by a $6.9 million increase in costs to deliver model calibration products. The product gross profit percentage remained flat at 71% during the three months ended September 30, 2020 as compared with the three months ended September 30, 2019. The 11%, or $8.4 million, decrease in product gross profit is attributable to the 11%, or $10.8 million, decrease in product revenue, partially offset by the 8%, or $2.4 million, decrease in cost of product revenue.

Service. The 7%, or $2.2 million, increase in cost of service revenue during the three months ended September 30, 2020 when compared with the three months ended September 30, 2019 was primarily due to a $1.1 million increase in employee-related expenses associated with the timing of certain projects and an increase in variable incentive compensation, a $0.6 million increase in cost of materials used to support customers under service contracts, and a $0.4 million increase in warranty expense. These increases were offset by a $0.6 million decrease in travel expense primarily attributable to COVID-19 related restrictions. The service gross profit percentage decreased by two percentage points to 72% for the three months ended September 30, 2020 as compared with the three months ended September 30, 2019. The 3%, or $2.4 million decrease in service gross profit is attributable to the $0.3 million decrease in service revenue and the 7%, or $2.2 million, increase in cost of service revenue.

Gross profit. Our gross profit decreased 7%, or $10.9 million, during the three months ended September 30, 2020 when compared with the three months ended September 30, 2019. This decrease is attributable to the decrease in revenue of 5%, or $11.1 million, partially offset by the $0.2 million, decrease in cost of revenue. The gross profit percentage decreased by two percentage points to 71% for the three months ended September 30, 2020 as compared with the three months ended September 30, 2019.

32

Operating Expenses

	Three Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Research and development	$	46,455	23	%	$	50,058	23	%	$	(3,603)	(7)	%
Sales and marketing	60,300		29		73,067		34		(12,767)		(17)
General and administrative	20,573		10		25,177		12		(4,604)		(18)
Amortization of acquired intangible assets	15,363		7		16,132		7		(769)		(5)
Restructuring charges	(31)		—		150		—		(181)		(121)
Total operating expenses	$	142,660	69	%	$	164,584	76	%	$	(21,924)	(13)	%

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 7%, or $3.6 million, decrease in research and development expenses was primarily due to a $1.1 million decrease in employee-related expenses associated with a reduction in headcount, a $0.6 million decrease in travel expense primarily attributable to COVID-19 related restrictions, and a $0.5 million decrease in depreciation expense during the three months ended September 30, 2020 when compared with the three months ended September 30, 2019.

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 17%, or $12.8 million, decrease in total sales and marketing expenses was primarily due to a $4.5 million decrease in travel expense primarily attributable to COVID-19 related restrictions, a $3.7 million decrease in commissions expense, a $2.5 million decrease in advertising expense, a $1.6 million decrease in employee-related expenses largely due to a reduction in headcount, and a $0.6 million decrease in expenses related to trade shows, user conferences and other events attributable to continued cost control and COVID-19 related restrictions during the three months ended September 30, 2020 when compared with the three months ended September 30, 2019.

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 18%, or $4.6 million, decrease in general and administrative expenses was primarily due to a $3.0 million decrease in legal-related expenses and penalties, a $0.5 million decrease in bad debt expenses, a $0.4 million decrease in travel expense primarily attributable to COVID-19 related restrictions, and a $0.4 million decrease in rent and other facilities-related expenses during the three months ended September 30, 2020 when compared with the three months ended September 30, 2019.

Amortization of acquired intangible assets. Amortization of acquired intangible assets consists primarily of amortization of customer relationships, definite-lived trademarks and tradenames, and leasehold interests related to our acquisitions of Danaher Corporation's communications business (Comms Transaction), ONPATH Technologies, Inc. (ONPATH), Simena, LLC (Simena), Psytechnics, Ltd (Psytechnics), Network General Corporation (Network General), Avvasi Inc. (Avvasi) and Efflux Systems, Inc. (Efflux).

The 5%, or $0.8 million, decrease in amortization of acquired intangible assets was largely due to a decrease in the amortization of intangible assets related to the Comms Transaction.

33

Interest and Other Expense, Net. Interest and other 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
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Interest and other expense, net	$	(3,394)	(2)	%	$	(3,616)	(2)	%	$	222	6	%

The 6%, or $0.2 million, decrease in interest and other expense, net was primarily due to a $2.5 million decrease in interest expense due to debt repayments on the credit facility as well as a decrease in the average interest rate, partially offset by a $1.0 million increase in foreign exchange expense, and a $1.0 million decrease in interest income received on investments.

Income Taxes. Our effective income tax rates were 1,057.4% and 60.1% for the three months ended September 30, 2020 and 2019, respectively. The effective income tax rate for the three months ended September 30, 2020 differed from the effective income tax rate for the three months ended September 30, 2019, primarily due to generating a significant pre-tax loss in the three months ended September 30, 2019 when compared to the pre-tax income generated during the three months ended September 30, 2020.

	Three Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Income tax expense	$	4,071	2	%	$	6,561	3	%	$	(2,490)	(38)	%

Six Months Ended September 30, 2020 and 2019

Revenue

During the six months ended September 30, 2020, and 2019, no direct customer or indirect channel partner accounted for more than 10% of our total revenue.

	Six Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Revenue:
Product	$	163,672	42	%	$	178,494	44	%	$	(14,822)	(8)	%
Service	225,482		58	%	223,951		56	%	1,531		1	%
Total revenue	$	389,154	100	%	$	402,445	100	%	$	(13,291)	(3)	%

Product. The 8%, or $14.8 million, decrease in product revenue compared with the same period last year was primarily due to a decrease in revenue from network performance management offerings for enterprise and service provider customers, partially offset by an increase in revenue from DDoS offerings.

Service. The 1%, or $1.5 million, increase in service revenue compared with the same period last year was primarily due to an increase in revenue from DDoS offerings and new maintenance contracts, partially offset by a decrease in post-contract services.

34

Total revenue by geography was as follows:

	Six Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
United States	$	227,350	58	%	$	246,647	61	%	$	(19,297)	(8)	%
International:
Europe	72,748		19		65,210		16		7,538		12	%
Asia	27,574		7		25,690		7		1,884		7	%
Rest of the world	61,482		16		64,898		16		(3,416)		(5)	%
Subtotal international	161,804		42		155,798		39		6,006		4	%
Total revenue	$	389,154	100	%	$	402,445	100	%	$	(13,291)	(3)	%

United States revenue decreased 8%, or $19.3 million, primarily due to a decrease in revenue from network performance management offerings, partially offset by an increase in revenue from DDoS offerings. International revenue increased 4%, or $6.0 million, primarily driven by higher revenue from DDoS offerings, as well as a smaller increase in revenue from network performance management offerings.

Cost of Revenue and Gross Profit

	Six Months Ended										Change
	September 30,
	(Dollars in Thousands)
	2020					2019
				% of Revenue					% of Revenue		$		%
Cost of revenue
Product	$	48,129		12	%	$	56,303		14	%	$	(8,174)	(15)	%
Service	63,751			16		57,572			14		6,179		11	%
Total cost of revenue	$	111,880		28	%	$	113,875		28	%	$	(1,995)	(2)	%
Gross profit:
Product $	$	115,543		30	%	$	122,191		30	%	$	(6,648)	(5)	%
Product gross profit %	71		%			68		%
Service $	$	161,731		42	%	$	166,379		41	%	$	(4,648)	(3)	%
Service gross profit %	72		%			74		%
Total gross profit $	$	277,274				$	288,570				$	(11,296)	(4)	%
Total gross profit %	71		%			72		%

Product. The 15%, or $8.2 million, decrease in cost of product revenue compared to the same period last year was primarily due to a $7.3 million decrease in direct material costs due to a decrease in product revenue, a $3.6 million decrease in inventory obsolescence charges, a $3.1 million decrease in the amortization of intangible assets, a $0.8 million decrease in overhead costs, and a $0.6 million decrease in employee-related expenses largely due to the timing of certain projects, partially offset by an increase in variable incentive compensation. These decreases were partially offset by a $7.7 million increase in costs to deliver model calibration products. The product gross profit percentage increased by three percentage points to 71% during the six months ended September 30, 2020 when compared to the six months ended September 30, 2019. The 5%, or $6.6 million, decrease in product gross profit is attributable to the 8%, or $14.8 million, decrease in product revenue, partially offset by the 15%, or $8.2 million, decrease in cost of product revenue.

Service. The 11%, or $6.2 million, increase in cost of service revenue compared to the same period last year was primarily due to a $5.5 million increase in employee-related expenses due to an increase in variable incentive compensation and the timing of certain projects, a $0.6 million increase in cost of materials used to support customers under service contracts, and a $0.5M increase in warranty expense. These increases were partially offset by a $1.0 million decrease in travel expense primarily attributable to COVID-19 related restrictions. The service gross profit percentage decreased two percentage points to

35

72% for the six months ended September 30, 2020 when compared to the six months ended September 30, 2019. The 3%, or $4.6 million, decrease in service gross profit is attributable to the 11%, or $6.2 million, increase in cost of service revenue, partially offset by the 1%, or $1.5 million, increase in service revenue.

Gross profit. Our gross profit for the six months ended September 30, 2020 decreased 4%, or $11.3 million, compared to the same period last year. This decrease is primarily attributable to the decrease in revenue of 3%, or $13.3 million, partially offset by the decrease in cost of revenue of 2%, or $2.0 million. The gross profit percentage decreased by one percentage point to 71% for the six months ended September 30, 2020 when compared to the six months ended September 30, 2019.

Operating Expenses

	Six Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Research and development	$	91,836	24	%	$	93,785	23	%	$	(1,949)	(2)	%
Sales and marketing	119,734		31		146,592		36		(26,858)		(18)
General and administrative	45,726		12		47,388		12		(1,662)		(4)
Amortization of acquired intangible assets	30,624		8		32,275		8		(1,651)		(5)
Restructuring charges	62		—		273		—		(211)		(77)
Total operating expenses	$	287,982	75	%	$	320,313	79	%	$	(32,331)	(10)	%

Research and development. The 2%, or $1.9 million, decrease in research and development expenses for the six months ended September 30, 2020 compared to the same period last year was primarily due to a $1.5 million decrease in travel expense primarily attributable to COVID-19 related restrictions, a $1.2 million decrease in depreciation expense, a $1.0 million decrease in contractor fees, and a $0.7 million decrease in rent and other facilities related expenses. These decreases were offset by a $3.5 million increase in employee-related expenses due to an increase in variable incentive compensation.

Sales and marketing. The 18%, or $26.9 million, decrease in total sales and marketing expenses for the six months ended September 30, 2020 compared to the same period last year was primarily due to a $9.7 million decrease in travel expense primarily attributable to COVID-19 related restrictions, a $8.1 million decrease in expenses related to trade shows, user conferences and other events attributable to continued cost control and COVID-19 related restrictions, a $4.6 million decrease in advertising expense, a $3.5 million decrease in commissions expense, and a $0.8 million decrease in employee-related expenses due to a reduction in headcount partially offset by an increase in variable incentive compensation.

General and administrative. The 4%, or $1.7 million, decrease in general and administrative expenses for the six months ended September 30, 2020 compared to the same period last year was primarily due to a $1.0 million decrease in legal-related expenses and penalties, an $0.8 million decrease in rent and other facilities related expenses, an $0.8 million decrease in travel expense primarily attributable to COVID-19 related restrictions, and a $0.7 million decrease in bad debt expense. These decreases were partially offset by a $1.2 million increase in employee-related expenses due to an increase in variable incentive compensation.

Amortization of acquired intangible assets. Amortization of acquired intangible assets consists primarily of amortization of customer relationships, definite-lived trademark and tradenames, and leasehold interest related to the Comms Transaction and the acquisitions of ONPATH, Simena, Psytechnics, Network General, Avvasi and Efflux.

The 5%, or $1.7 million, decrease in amortization of acquired intangible assets for the six months ended September 30, 2020 compared to the same period last year was largely due to a reduction in the amortization of intangible assets related to the Comms Transaction.

Restructuring. During the fiscal years ended March 31, 2020 and 2019, we implemented programs to restructure certain departments to better align functions and reduce overall headcount. As a result of the workforce reduction, during the six months ended September 30, 2020 and 2019, we recorded a restructuring charge totaling $0.1 million and $0.3 million, respectively, related to one-time termination benefits.

36

Interest and Other Expense, Net

	Six Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Interest and other expense, net	$	(8,174)	(2)	%	$	(8,015)	(2)	%	$	(159)	(2)	%

The 2%, or $0.2 million, increase in interest and other expense, net was primarily due to a $2.9 million increase in foreign exchange expense, a $2.4 million decrease in interest income received on investments and a $1.2 million decrease in transitional services agreement income related to the HNT business divestiture. These increases in interest and other expense, net were partially offset by a $5.7 million decrease in interest expense due to debt repayments on the credit facility as well as a decrease in the average interest rate, and a $0.5 million decrease in other expense due to a change in the fair value of the contingent consideration related to the HNT business divestiture recorded during the six months ended September 30, 2019.

Income Taxes. Our effective income tax rates were 11.8% and 17.7% for the six months ended September 30, 2020 and 2019, respectively. The effective income tax rate for the six months ended September 30, 2020 differed from the effective rate for the six months ended September 30, 2019, primarily due to a significant discrete tax expense related to elections made to treat several of the Company's foreign subsidiaries as U.S. branches for federal income tax purposes in the six months ended September 30, 2019. As a result, we recorded additional tax expense for the six months ended September 30, 2019 due to establishing new U.S. net deferred tax liabilities resulting from the differences between the GAAP basis and the U.S. federal tax basis of the existing assets and liabilities of those foreign subsidiaries.

	Six Months Ended								Change
	September 30,
	(Dollars in Thousands)
	2020				2019
			% of Revenue				% of Revenue		$		%
Income tax expense	$	2,224	1	%	$	7,057	2	%	$	(4,833)	(68)	%

Off-Balance Sheet Arrangements

At September 30, 2020 and 2019, we did not have any off-balance sheet arrangements as defined in Regulation S-K, Item 303(a)(4)(ii).

Commitments 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.

Acquisition related – We had a contingent liability at September 30, 2020 for $0.7 million related to the acquisition of Gigavation in February 2020 for which an escrow account was established to cover damages we may suffer related to any liabilities that we did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. Except to the extent that valid indemnification claims are made prior to such time, the $0.7 million will be paid to the seller in February 2021. The contingent purchase consideration of $0.7 million was included as accrued other in our consolidated balance sheet at September 30, 2020 and March 31, 2020.

37

We had a contingent liability at March 31, 2020 related to the acquisition of Eastwind in April 2019. The contingent purchase consideration represents amounts deposited into an escrow account which was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. The contingent purchase consideration of $1.0 million was included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The contingent purchase consideration of $1.0 million was paid to the seller in April 2020.

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 material adverse effect on our financial condition, results of operations or cash flows.

As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against NetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’s Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. NetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’s patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. Following the entry of final judgment, on June 12, 2019, we filed our Notice of Appeal. On July 14, 2020, the Court of Appeals for the Federal Circuit issued a decision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. NetScout continues to avail itself of its legal options. NetScout has concluded that the risk of loss associated with the post-suit damages award is "probable" in accounting terms, regardless of the options NetScout may pursue, and that the risk of loss associated with pre-suit damages is now remote. Accounting rules require us to provide an estimate for the range of potential liability. NetScout currently estimates that the range of liability is the sum of post-suit damages, plus pre- and post-judgment interest amounts and royalties owed on post-trial sales of the accused G10 and GeoBlade products. Any potential enhancement is not reasonably estimable but is likely within the range of $0 to $2,800,000.

Other contingent liabilities - During fiscal year 2020, one of our subsidiaries, located in the United Kingdom (UK), determined that value added tax (VAT) was not properly applied to certain supplies of service to the UK. We filed a blank disclosure with HM Revenue & Customs (HMRC) notifying HMRC of these application differences, and subsequently filed a voluntary disclosure agreement (VDA). The VDA covered the period from March 1, 2016 through February 29, 2020. The penalties associated with the application differences can range from 0%-30% of the underpayment and are based on objective and subjective determinations to be made by HMRC. At March 31, 2020 and September 30, 2020, we have accrued the penalties that we believe are probable and estimable of assessment by HMRC. A majority of the difference in our application of the VAT rules relates to services for which the subsidiary did not collect VAT from its customers and for which customers would have been eligible to reclaim under the UK VAT regime. Based on these facts, we currently believe that it is probable that we will be required to settle these amounts separately with our customers and HMRC, hence we have recorded a liability, which is included as accrued other in our consolidated balance sheet and an asset, which is included in prepaid expenses and other current assets in our consolidated balance sheet at September 30, 2020 for approximately $6.3 million, respectively.

Liquidity and Capital Resources

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

	September 30, 2020		March 31, 2020
Cash and cash equivalents	$	415,719	$	338,489
Short-term marketable securities	12,127		47,969
Long-term marketable securities	—		2,613
Cash, cash equivalents and marketable securities	$	427,846	$	389,071

38

Cash, cash equivalents and marketable securities

At September 30, 2020, cash, cash equivalents and marketable securities (current and non-current) totaled $427.8 million, a $38.7 million increase from $389.1 million at March 31, 2020. This increase was primarily due to cash provided by operating activities of $56.6 million, partially offset by $12.6 million used for tax withholdings on restricted stock units, $5.8 million used for capital expenditures, and $4.5 million used for purchases of intangible assets during the six months ended September 30, 2020.

At September 30, 2020, cash and short-term and long-term investments in the United States were $293.8 million, while cash held outside the United States was approximately $134.0 million.

Cash and cash equivalents were impacted by the following:

	Six Months Ended
	September 30,
	(in thousands)
	2020		2019
Net cash provided by operating activities	$	56,646	$	48,456
Net cash provided by investing activities	$	28,114	$	1,431
Net cash used in financing activities	$	(13,599)	$	(211,375)

Net cash from operating activities

Cash provided by operating activities was $56.6 million during the six months ended September 30, 2020, compared with $48.5 million of cash provided by operating activities during the six months ended September 30, 2019. This $8.1 million increase was due in part to a $25.7 million increase from a smaller net loss, a $13.9 million increase from accrued compensation and other expenses, an $11.7 million increase from accounts receivable, and a $1.4 million increase from operating lease liabilities. These increases were partially offset by a $15.6 million decrease from prepaid expenses and other assets, an $11.4 million decrease from accounts payable, a $5.5 million decrease from depreciation and amortization expense, a $4.0 million decrease from deferred revenue, a $3.7 million decrease from deferred income taxes, a $3.0 million decrease from inventories, and a $0.8 million decrease from share-based compensation expense during the six months ended September 30, 2020 as compared with the six months ended September 30, 2019.

Net cash from investing activities

	Six Months Ended
	September 30,
	(in thousands)
	2020		2019
Cash provided by investing activities included the following:
Purchase of marketable securities	$	(6,780)	$	(83,502)
Proceeds from sales and maturity of marketable securities	45,094		98,147
Purchase of fixed assets	(5,769)		(9,056)
Purchase of intangible assets	(4,537)		—
Decrease (increase) in deposits	106		(4)
Acquisition of businesses	—		(4,154)
	$	28,114	$	1,431

Cash provided by investing activities increased $26.7 million from $1.4 million during the six months ended September 30, 2019 to $28.1 million during the six months ended September 30, 2020

The overall increase in cash inflow from marketable securities was primarily related to a decrease of $76.7 million in the purchase of marketable securities offset by a $53.1 million decrease in proceeds from the sales and maturity of marketable securities during the six months ended September 30, 2020 when compared with the six months ended September 30, 2019.

During the six months ended September 30, 2020, there was a $4.5 million cash outflow related to the purchases of intangible assets.

39

During the six months ended September 30, 2019, there was a $4.2 million cash outflow related to the acquisition of Eastwind.

Cash used for the purchase of fixed assets decreased $3.3 million from $9.1 million during the six months ended September 30, 2019 to $5.8 million during the six months ended September 30, 2020.

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 2021.

Net cash from financing activities

	Six Months Ended
	September 30,
	(in thousands)
	2020		2019
Cash used in financing activities included the following:
Issuance of common stock under stock plans	$	1	$	2
Payment of contingent consideration	(1,000)		—
Repayment of long-term debt	—		(100,000)
Treasury stock repurchases	—		(100,000)
Tax withholding on restricted stock units	(12,600)		(11,377)
	$	(13,599)	$	(211,375)

Cash used in financing activities decreased by $197.8 million to $13.6 million during the six months ended September 30, 2020, compared with $211.4 million of cash used in financing activities during the six months ended September 30, 2019.

During the six months ended September 30, 2020, we paid $1.0 million of contingent purchase consideration related to the Eastwind acquisition in April 2020.

During the six months ended September 30, 2019, we repaid $100.0 million of borrowings under the Amended Credit Agreement.

During the six months ended September 30, 2019, we repurchased 4,160,836 shares of our common stock for $100.0 million under the twenty-five million share repurchase program. There were no repurchases during the six months ended September 30, 2020.

In connection with the delivery of the Company's common stock upon vesting of restricted stock units, we withheld 481,739 and 500,093 shares at a cost of $12.6 million and $11.4 million related to minimum statutory tax withholding requirements on these restricted stock units during the six months ended September 30, 2020 and 2019, respectively. These withholding transactions do not fall under the repurchase program described above, and therefore do not reduce the number of shares that are available for repurchase under that program.

Credit Facility

On January 16, 2018, we amended and expanded our existing credit agreement (Amended Credit Agreement) with a syndicate of lenders by and among: NetScout; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Fifth Third Bank, Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Amended Credit Agreement provides for a five-year, $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. We may elect to use the new credit facility for general corporate purposes or to finance the repurchase of up to twenty-five million shares of common stock under our common stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. At September 30, 2020, $450 million was outstanding under the Amended Credit Agreement.

At our election, revolving loans under the Amended Credit Agreement bear interest at either (a) an Alternate Base Rate per annum equal to the greatest of (1) JPMorgan's prime rate, (2) 0.50% in excess of the New York Federal Reserve Bank (NYFRB) rate, or (3) an adjusted one month LIBOR rate plus 1%; or (b) such adjusted LIBOR rate (for the interest period selected by us), in each case plus an applicable margin. For the period from the delivery of our financial statements for the quarter ended June 30, 2020, until we have delivered financial statements for the quarter ended September 30, 2020, the

40

applicable margin will be 1.50% per annum for LIBOR loans and 0.50% per annum for Alternate Base Rate loans, and thereafter the applicable margin will vary depending on our leverage ratio, ranging from 1.00% per annum for Base Rate loans and 2.00% per annum for LIBOR loans if our consolidated leverage ratio is greater than 3.50 to 1.00, down to 0.00% per annum for Alternate Base Rate loans and 1.00% per annum for LIBOR loans if our consolidated leverage ratio is equal to or less than 1.50 to 1.00.

On July 27, 2017, the U.K. Financial Conduct Authority (FCA) announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. Our Amended Credit Agreement provides for the Administrative Agent to determine if (i) adequate and reasonable means do not exist for ascertaining the LIBOR rate or (ii) the FCA or Government Authority having jurisdiction over the Administrative Agent has made a public statement identifying a specific date after which the LIBOR rate shall no longer be used for determining interest rates for loans and the Administrative Agent determines that (i) and (ii) above are unlikely to be temporary, then the Administrative Agent and NetScout would agree to transition to an Alternate Base Rate borrowing as described above or amend the Credit Agreement to establish an alternate rate of interest to LIBOR that gives due consideration to the then prevailing market convention for determining a rate of interest for syndicated loans in the United States at such time.

Our consolidated leverage ratio is the ratio of our total funded debt compared to our consolidated adjusted EBITDA. Consolidated adjusted EBITDA includes certain adjustments, including, without limitation, adjustments relating to extraordinary, unusual or non-recurring charges, certain restructuring charges, non-cash charges, certain transaction costs and expenses and certain pro forma adjustments in connection with material acquisitions and dispositions, all as set forth in detail in the definition of consolidated adjusted EBITDA in the Amended Credit Agreement.

Commitment fees will accrue on the daily unused amount of the credit facility. For the period from the delivery of our financial statements for the quarter ended June 30, 2020, until we have delivered financial statements for the quarter ended September 30, 2020, the commitment fee will be 0.25% per annum, and thereafter the commitment fee will vary depending on our consolidated leverage ratio, ranging from 0.30% per annum if our consolidated leverage ratio is greater than 2.75 to 1.00, down to 0.15% per annum if our consolidated leverage ratio is equal to or less than 1.50 to 1.00.

Letter of credit participation fees are payable to each lender on the amount of such lender’s letter of credit exposure, during the period from the closing date of the Amended Credit Agreement to but excluding the date which is the later of (i) the date on which such lender’s commitment terminates or (ii) the date on which such lender ceases to have any letter of credit exposure, at a rate per annum equal to the applicable margin for LIBOR loans. Additionally, we will pay a fronting fee to each issuing bank in amounts to be agreed to between us and the applicable issuing bank.

Interest on Alternate Base Rate loans is payable at the end of each calendar quarter. Interest on LIBOR loans is payable at the end of each interest rate period or at the end of each three-month interval within an interest rate period if the period is longer than three months. We may also prepay loans under the Amended 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 and other obligations under the credit facility are (a) guaranteed by each of our wholly owned material domestic restricted subsidiaries, subject to certain exceptions, and (b) are secured by substantially all of the assets of us and the subsidiary guarantors, including a pledge of all the capital stock of material subsidiaries held directly by us and the subsidiary guarantors (which pledge, in the case of any foreign subsidiary, is limited to 65% of the voting stock), subject to certain customary exceptions and limitations. The Amended Credit Agreement generally prohibits any other liens on the assets of NetScout and its restricted subsidiaries, subject to certain exceptions as described in the Amended Credit Agreement.

The Amended Credit Agreement contains certain covenants applicable to us and our restricted subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes, dividends and distributions, investments (including acquisitions), transactions with affiliates, asset sales, including sale-leaseback transactions, speculative hedge agreements, payment of junior financing, changes in business and other limitations customary in senior secured credit facilities. In addition, we are required to maintain certain consolidated leverage and interest coverage ratios. These covenants and limitations are more fully described in the Amended Credit Agreement. At September 30, 2020, we were in compliance with all of these covenants.

The Amended Credit Agreement provides that events of default will exist in certain circumstances, including failure to make payment of principal or interest on the loans when required, failure to perform certain obligations under the Amended Credit Agreement and related documents, defaults under certain other indebtedness, certain insolvency events, certain events arising under ERISA, a change of control and certain other events. Upon an event of default, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may, terminate the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents.

41

In connection with the Amended Credit Agreement described above, we terminated our previous term loan dated as of July 14, 2015, by and among NetScout; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

We have capitalized debt issuance costs totaling $12.2 million at September 30, 2020, which are being amortized over the life of the revolving credit facility. The unamortized balance was $4.0 million as of September 30, 2020. The balance of $1.7 million was included as prepaid expenses and other current assets and a balance of $2.3 million was included as other assets in our consolidated balance sheet.

Expectations for Fiscal Year 2021

We are actively managing the business to maintain cash flow and believe that we currently have adequate liquidity. We believe that these factors will allow us to meet our anticipated funding requirements.

We expect net cash provided by operating activities combined with cash, cash equivalents, and marketable securities and borrowing availability under our revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirement over at least the next twelve months.

Additionally, a portion of our cash may be used to acquire or invest in complementary businesses or products, to obtain the right to use complementary technologies, or to repurchase shares of our common stock through our stock repurchase program. 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.

Recent Accounting Pronouncements

For information with respect to recent accounting pronouncements on our consolidated financial statements, see Note 1 contained in the "Notes to Consolidated Financial Statements" included in Part I of this Quarterly Report on Form 10-Q.

42

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk. We hold our cash, cash equivalents and investments for working capital purposes. Some of the securities we invest in are subject to market risk. This means that a change in prevailing interest rates may cause the principal amount of the investment to fluctuate. To minimize this risk, we maintain our portfolio of cash, cash equivalents and investments in a variety of securities, including money market funds and government debt securities. The risk associated with fluctuating interest rates is limited to our investment portfolio. Due to the short-term nature of these instruments, we believe that we do not have any material exposure to changes in the fair value of our investment portfolio as a result of changes in interest rates. Declines in interest rates, however, would reduce future interest income. The effect of a hypothetical 10% increase or decrease in overall interest rates would not have had a material impact on our operating results or the total fair value of the portfolio.

We are exposed to market risks related to fluctuations in interest rates related to our credit facility. At September 30, 2020, we owed $450 million on this loan with an interest rate of 1.65%. A sensitivity analysis was performed on the outstanding portion of our debt obligation as of September 30, 2020. Should the current weighted-average interest rate increase or decrease by 10%, the resulting annual increase or decrease to interest expense would be approximately $0.7 million as of September 30, 2020.

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. Periodically, we also enter into forward contracts to manage exchange risk associated with third-party transactions and for which we do not elect hedge accounting treatment. We do not use derivative financial instruments for speculative trading purposes.

At September 30, 2020, we had foreign currency forward contracts designated as hedging instruments with notional amounts totaling $3.5 million and foreign currency forward contracts not designated as hedging instruments with a notional amount of $6.6 million. The valuation of outstanding foreign currency forward contracts (both designated and not designated as hedging instruments) at September 30, 2020 resulted in an asset balance of $151 thousand, reflecting favorable rates in comparison to current market rates. At March 31, 2020, we had foreign currency forward contracts designated as hedging instruments with notional amounts totaling $1.7 million. The valuation of outstanding foreign currency forward contracts designated as hedging instruments at March 31, 2020 resulted in a liability balance of $49 thousand, reflecting unfavorable contract rates in comparison to current market rates at this date. The effect of a hypothetical 10% change in foreign currency exchange rates applicable to our business would not have a material impact on our historical consolidated financial statements. As our international operations grow, we will continue to reassess our approach to manage our risk relating to fluctuations in currency rates.

Item 4.  Controls and Procedures

At September 30, 2020, 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 (as defined in Rule 13a-15(e) and 15d-15(e) 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 September 30, 2020, our disclosure controls and procedures were effective at the reasonable assurance level 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 control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) occurred during the period covered by this quarterly report that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

43

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 be material to our financial condition, results of operations or cash flows.

As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against NetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’s Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. NetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’s patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. Following the entry of final judgment, on June 12, 2019, we filed our Notice of Appeal. On July 14, 2020, the Court of Appeals for the Federal Circuit issued a decision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. NetScout continues to avail itself of its legal options. NetScout has concluded that the risk of loss associated with the post-suit damages award is "probable" in accounting terms, regardless of the options NetScout may pursue, and that the risk of loss associated with pre-suit damages is now remote. Accounting rules require us to provide an estimate for the range of potential liability. NetScout currently estimates that the range of liability is the sum of post-suit damages, plus pre- and post-judgment interest amounts and royalties owed on post-trial sales of the accused G10 and GeoBlade products. Any potential enhancement is not reasonably estimable but is likely within the range of $0 to $2,800,000.

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, 2020. The risks discussed in our Annual Report on Form 10-K could materially affect our business, financial condition and future results. There have been no material changes to those risk factors since we filed our Annual Report on Form 10-K. The risks described in our Annual Report on Form 10-K 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.

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

Sales of Unregistered Securities

None.

Issuer Purchase of Equity Securities

The following table provides information about purchases we made during the quarter ended September 30, 2020 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	Maximum Number of Shares That May Yet be Purchased Under the Program
7/1/2020-7/31/2020	—	$	—	—	7,243,431
8/1/2020-8/31/2020	368,033	25.77		—	7,243,431
9/1/2020-9/30/2020	543	22.99		—	7,243,431
Total	368,576	$	25.77	—	7,243,431

(1)We purchased an aggregate of 368,576 shares during the three months ended September 30, 2020 transferred to us from employees in satisfaction of minimum tax withholding obligations associated with the vesting of restricted stock units

44

during the period. Such purchases reflected in the table do not reduce the maximum number of shares that may be purchased under our previously announced stock repurchase program (our previously disclosed twenty-five million share repurchase program).

Item 3.  Defaults Upon Senior Securities

None.

Item 4.  Mine Safety Disclosures

Not Applicable.

Item 5.  Other Information

None.

45

Item 6. Exhibits

(a)Exhibits

3.1		Composite conformed copy of Third Amended and Restated Certificate of Incorporation of NetScout (as amended) (filed as Exhibit 3.2 to NetScout's current report on Form 8-K, SEC File No. 000-26251, filed on September 21, 2016, and incorporated herein by reference).
3.2		Amended and Restated By-laws of NetScout (filed as Exhibit 3.1 to NetScout's current report on Form 8-K, SEC File No. 000-26251, filed on May 11, 2020 and incorporated herein by reference).
10.1		NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended and restated (filed as Exhibit 99.1 to NetScout’s Registration Statement on Form S-8, SEC File No. 333-248786, filed on September 14, 2020 and incorporated herein by reference).
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.
101.INS	+	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	+	Inline XBRL Taxonomy Extension Schema Document.
101.CAL	+	Inline XBRL Taxonomy Extension Calculation Linkbase document.
101.DEF	+	Inline XBRL Taxonomy Extension Definition Linkbase document.
101.LAB	+	Inline XBRL Taxonomy Extension Label Linkbase document.
101.PRE	+	Inline XBRL Taxonomy Extension Presentation Linkbase document.
104		The cover page from the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2020 formatted in Inline XBRL

+	Filed herewith.
++	Exhibit has been furnished, is not deemed filed and is not to be incorporated by reference into any of the Company's filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, irrespective of any general incorporation language contained in any such filing.

46

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: November 3, 2020	/s/ Anil K. Singhal
	Anil K. Singhal
	President, Chief Executive Officer and Chairman
	(Principal Executive Officer)
Date: November 3, 2020	/s/ Jean Bua
	Jean Bua
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer)
	(Principal Accounting Officer)

47

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: November 3, 2020

/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: November 3, 2020

/s/ Jean Bua

Jean Bua

Executive 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 September 30, 2020 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

Principal Executive Officer

November 3, 2020

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 September 30, 2020 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

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

(Principal Accounting Officer)

November 3, 2020

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.

XML

Cover Page - shares	6 Months Ended
	Sep. 30, 2020	Oct. 29, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	000-26251
Entity Registrant Name	NETSCOUT SYSTEMS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-2837575
Entity Address, Address Line One	310 Littleton Road
Entity Address, City or Town	Westford
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01886
City Area Code	978
Local Phone Number	614-4000
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	NTCT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		73,576,022
Entity Central Index Key	0001078075
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 415,719	$ 338,489
Marketable securities	12,127	47,969
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $782 and $1,350 at September 30, 2020 and March 31, 2020, respectively	169,687	213,514
Inventories and deferred costs	26,223	22,227
Prepaid income taxes	8,998	13,505
Prepaid expenses and other current assets	36,654	24,039
Total current assets	669,408	659,743
Fixed assets, net	53,168	57,715
Operating lease right-of-use assets	65,562	68,583
Goodwill	1,718,595	1,725,680
Intangible assets, net	551,783	582,179
Deferred income taxes	6,690	6,220
Long-term marketable securities	0	2,613
Other assets	12,345	17,770
Total assets	3,077,551	3,120,503
Current liabilities:
Accounts payable	18,083	20,004
Accrued compensation	61,842	75,632
Accrued other	34,484	21,840
Income taxes payable	233	903
Deferred revenue and customer deposits	236,240	270,281
Current portion of operating lease liabilities	11,325	10,337
Total current liabilities	362,207	398,997
Other long-term liabilities	14,646	10,039
Deferred tax liability	108,716	114,394
Accrued long-term retirement benefits	36,408	34,256
Long-term deferred revenue and customer deposits	99,581	104,240
Operating lease liabilities, net of current portion	66,673	70,658
Long-term debt	450,000	450,000
Total liabilities	1,138,231	1,182,584
Commitments and contingencies (Note 14)
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at September 30, 2020 and March 31, 2020	0	0
Common stock, $0.001 par value:
300,000,000 shares authorized; 123,840,945 and 122,006,077 shares issued and 73,574,035 and 72,220,906 shares outstanding at September 30, 2020 and March 31, 2020, respectively	123	122
Additional paid-in capital	2,924,757	2,891,553
Accumulated other comprehensive loss	(1,258)	(3,160)
Treasury stock at cost, 50,266,910 and 49,785,171 shares at September 30, 2020 and March 31, 2020, respectively	(1,318,535)	(1,305,935)
Retained earnings	334,233	355,339
Total stockholders' equity	1,939,320	1,937,919
Total liabilities and stockholders' equity	$ 3,077,551	$ 3,120,503

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 782	$ 1,350
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	123,840,945	122,006,077
Common stock, shares outstanding (in shares)	73,574,035	72,220,906
Treasury stock, shares (in shares)	50,266,910	49,785,171

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 205,339	$ 216,421	$ 389,154	$ 402,445
Cost of revenue:
Total cost of revenue	58,900	59,132	111,880	113,875
Gross profit	146,439	157,289	277,274	288,570
Operating expenses:
Research and development	46,455	50,058	91,836	93,785
Sales and marketing	60,300	73,067	119,734	146,592
General and administrative	20,573	25,177	45,726	47,388
Amortization of acquired intangible assets	15,363	16,132	30,624	32,275
Restructuring charges	(31)	150	62	273
Total operating expenses	142,660	164,584	287,982	320,313
Income (loss) from operations	3,779	(7,295)	(10,708)	(31,743)
Interest and other expense, net:
Interest income	171	1,214	437	2,872
Interest expense	(2,715)	(5,173)	(5,789)	(11,538)
Other income (expense), net	(850)	343	(2,822)	651
Total interest and other expense, net	(3,394)	(3,616)	(8,174)	(8,015)
Income (loss) before income tax expense	385	(10,911)	(18,882)	(39,758)
Income tax expense	4,071	6,561	2,224	7,057
Net loss	$ (3,686)	$ (17,472)	$ (21,106)	$ (46,815)
Basic net loss per share (in dollars per share)	$ (0.05)	$ (0.23)	$ (0.29)	$ (0.61)
Diluted net loss per share (in dollars per share)	$ (0.05)	$ (0.23)	$ (0.29)	$ (0.61)
Weighted average common shares outstanding used in computing:
Net loss per share - basic (in shares)	73,058	75,687	72,682	76,490
Net loss per share - diluted (in shares)	73,058	75,687	72,682	76,490
Product
Revenue:
Total revenue	$ 91,979	$ 102,775	$ 163,672	$ 178,494
Cost of revenue:
Total cost of revenue	26,977	29,368	48,129	56,303
Service
Revenue:
Total revenue	113,360	113,646	225,482	223,951
Cost of revenue:
Total cost of revenue	$ 31,923	$ 29,764	$ 63,751	$ 57,572

XML

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (3,686)	$ (17,472)	$ (21,106)	$ (46,815)
Other comprehensive income (loss):
Cumulative translation adjustments	940	(525)	1,893	(1,086)
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) taxes of ($10), $5, ($33) and $11, respectively	(33)	2	(107)	37
Total net change in market value of investments	(33)	2	(107)	37
Changes in market value of derivatives:
Changes in market value of derivatives, net of taxes (benefit) of $55, ($22), $59 and ($41), respectively	181	(5)	188	(60)
Reclassification adjustment for net gains included in net loss, net of (benefit) taxes of ($32), $11, ($22) and $21, respectively	(105)	13	(72)	49
Total net change in market value of derivatives	76	8	116	(11)
Other comprehensive income (loss)	983	(515)	1,902	(1,060)
Total comprehensive loss	$ (2,703)	$ (17,987)	$ (19,204)	$ (47,875)

XML

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Changes in unrealized (losses) gains, (benefit) tax	$ (10)	$ 5	$ (33)	$ 11
Changes in market value of derivatives, tax (benefit)	55	(22)	59	(41)
Reclassification adjustment for net gains included in net income (loss), tax	$ (32)	$ 11	$ (22)	$ 21

XML

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Voting	Additional Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings
Beginning balance (in shares) at Mar. 31, 2019		119,760,132			42,149,771
Beginning balance at Mar. 31, 2019	$ 2,065,433	$ 120	$ 2,828,922	$ (2,639)	$ (1,119,063)	$ 358,093
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(46,815)					(46,815)
Unrealized net investment gains (losses)	37			37
Unrealized net gain (losses) on derivative financial instruments	(11)			(11)
Cumulative translation adjustments	(1,086)			(1,086)
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		1,590,980
Issuance of common stock pursuant to vesting of restricted stock units	2	$ 2
Stock-based compensation expense for restricted stock units granted to employees	27,488		27,488
Issuance of common stock under employee stock purchase plan (in shares)		297,635
Issuance of common stock under employee stock purchase plan	6,593		6,593
Repurchase of treasury stock (in shares)					4,660,929
Repurchase of treasury stock	(111,377)				$ (111,377)
Ending balance (in shares) at Sep. 30, 2019		121,648,747			46,810,700
Ending balance at Sep. 30, 2019	1,940,264	$ 122	2,863,003	(3,699)	$ (1,230,440)	311,278
Beginning balance (in shares) at Jun. 30, 2019		120,123,018			43,568,720
Beginning balance at Jun. 30, 2019	2,011,435	$ 120	2,841,001	(3,184)	$ (1,155,252)	328,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,472)					(17,472)
Unrealized net investment gains (losses)	2			2
Unrealized net gain (losses) on derivative financial instruments	8			8
Cumulative translation adjustments	(525)			(525)
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		1,228,094
Issuance of common stock pursuant to vesting of restricted stock units	2	$ 2
Stock-based compensation expense for restricted stock units granted to employees	15,409		15,409
Issuance of common stock under employee stock purchase plan (in shares)		297,635
Issuance of common stock under employee stock purchase plan	6,593		6,593
Repurchase of treasury stock (in shares)					3,241,980
Repurchase of treasury stock	(75,188)				$ (75,188)
Ending balance (in shares) at Sep. 30, 2019		121,648,747			46,810,700
Ending balance at Sep. 30, 2019	1,940,264	$ 122	2,863,003	(3,699)	$ (1,230,440)	311,278
Beginning balance (in shares) at Mar. 31, 2020		122,006,077			49,785,171
Beginning balance at Mar. 31, 2020	1,937,919	$ 122	2,891,553	(3,160)	$ (1,305,935)	355,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(21,106)					(21,106)
Unrealized net investment gains (losses)	(107)			(107)
Unrealized net gain (losses) on derivative financial instruments	116			116
Cumulative translation adjustments	1,893			1,893
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		1,555,056
Issuance of common stock pursuant to vesting of restricted stock units	1	$ 1
Stock-based compensation expense for restricted stock units granted to employees	26,729		26,729
Issuance of common stock under employee stock purchase plan (in shares)		279,812
Issuance of common stock under employee stock purchase plan	6,475		6,475
Repurchase of treasury stock (in shares)					481,739
Repurchase of treasury stock	(12,600)				$ (12,600)
Ending balance (in shares) at Sep. 30, 2020		123,840,945			50,266,910
Ending balance at Sep. 30, 2020	1,939,320	$ 123	2,924,757	(1,258)	$ (1,318,535)	334,233
Beginning balance (in shares) at Jun. 30, 2020		122,353,504			49,898,334
Beginning balance at Jun. 30, 2020	1,929,817	$ 122	2,903,055	(2,241)	$ (1,309,038)	337,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,686)					(3,686)
Unrealized net investment gains (losses)	(33)			(33)
Unrealized net gain (losses) on derivative financial instruments	76			76
Cumulative translation adjustments	940			940
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		1,207,629
Issuance of common stock pursuant to vesting of restricted stock units	1	$ 1
Stock-based compensation expense for restricted stock units granted to employees	15,227		15,227
Issuance of common stock under employee stock purchase plan (in shares)		279,812
Issuance of common stock under employee stock purchase plan	6,475		6,475
Repurchase of treasury stock (in shares)					368,576
Repurchase of treasury stock	(9,497)				$ (9,497)
Ending balance (in shares) at Sep. 30, 2020		123,840,945			50,266,910
Ending balance at Sep. 30, 2020	$ 1,939,320	$ 123	$ 2,924,757	$ (1,258)	$ (1,318,535)	$ 334,233

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (21,106)	$ (46,815)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	53,152	58,666
Operating lease right-of-use assets	5,190	5,106
Loss on disposal of fixed assets	37	0
Share-based compensation expense	27,832	28,600
Net change in fair value of contingent and contractual liabilities	0	541
Accretion of contingent consideration	0	(24)
Deferred income taxes	(6,624)	(2,945)
Other gains	0	(85)
Changes in assets and liabilities
Accounts receivable and unbilled costs	44,640	32,937
Inventories	(5,472)	(2,484)
Prepaid expenses and other assets	(4,330)	11,289
Accounts payable	(1,339)	10,099
Accrued compensation and other expenses	9,484	(4,370)
Operating lease liabilities	(5,168)	(6,565)
Income taxes payable	(171)	(48)
Deferred revenue	(39,479)	(35,446)
Net cash provided by operating activities	56,646	48,456
Cash flows from investing activities:
Purchase of marketable securities	(6,780)	(83,502)
Proceeds from sales and maturity of marketable securities	45,094	98,147
Purchase of fixed assets	(5,769)	(9,056)
Purchase of intangible assets	(4,537)	0
Decrease (increase) in deposits	106
Decrease (increase) in deposits		(4)
Acquisition of businesses	0	(4,154)
Net cash provided by investing activities	28,114	1,431
Cash flows from financing activities:
Issuance of common stock under stock plans	1	2
Payment of contingent consideration	(1,000)	0
Repayment of long-term debt	0	(100,000)
Treasury stock repurchases	0	(100,000)
Tax withholding on restricted stock units	(12,600)	(11,377)
Net cash used in financing activities	(13,599)	(211,375)
Effect of exchange rate changes on cash and cash equivalents	5,069	(2,268)
Net increase (decrease) in cash and cash equivalents and restricted cash	76,230	(163,756)
Cash and cash equivalents and restricted cash, beginning of period	340,237	409,820
Cash and cash equivalents and restricted cash, end of period	416,467	246,064
Supplemental disclosures:
Cash paid for interest	4,177	10,167
Cash paid for income taxes	5,377	7,232
Non-cash transactions:
Transfers of inventory to fixed assets	1,530	2,290
Additions to property, plant and equipment included in accounts payable	605	238
Issuance of common stock under employee stock plans	6,475	6,593
Contingent consideration related to acquisition, included in accrued other	$ 0	$ 1,000

XML

BASIS OF PRESENTATION

6 Months Ended

Sep. 30, 2020

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. (NetScout or the Company). Certain information and footnote disclosures normally included in financial statements prepared under United States 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 and stockholders' equity, results of operations and cash flows. The year-end consolidated balance sheet data and statement of stockholders' equity were derived from the Company's audited financial statements, but do not include all disclosures required by GAAP. The results reported in these unaudited interim consolidated financial statements are not necessarily indicative of results that may be expected for the entire year. All significant intercompany accounts and transactions are eliminated in consolidation.

These unaudited interim 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, 2020 filed with the Securities and Exchange Commission on May 20, 2020.

COVID-19 Risks and Uncertainties

The Company is closely monitoring the impact of COVID-19 on all aspects of its business. COVID-19 was declared a

global pandemic by the World Health Organization on March 11, 2020 and the President of the United States declared the

COVID-19 outbreak a national emergency. While the COVID-19 pandemic has not had a material adverse impact on the

Company’s operations to date, the future impacts of the pandemic and any resulting economic impact are largely unknown and

rapidly evolving. It is possible that the COVID-19 pandemic, the measures taken by the governments of countries affected and

the resulting economic impact may materially and adversely affect the Company’s results of operations, cash flows and

financial position as well as its customers.

Under Accounting Standards Update (ASU) 2014-15, Presentation of Financial Statements—Going Concern (Subtopic

205-40), or ASC 205-40, the Company has the responsibility to evaluate whether conditions and/or events raise substantial doubt about its ability to meet its future financial obligations as they become due within one year after the date that the financial

statements are issued. The Company is taking precautionary actions to reduce costs and spending across the organization. This

includes limiting discretionary spending and reducing hiring activities. In addition, based on covenant levels at September 30, 2020, the Company has an incremental $317 million available under the $1.0 billion revolving credit facility.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the CARES Act) was enacted. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The Company has elected to defer the employer-paid portion of social security taxes. As of September 30, 2020, the Company had deferred $7.4 million of employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022.

The Company expects net cash provided by operating activities combined with cash, cash equivalents, and marketable securities and borrowing availability under the Company's revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirements over at least the next twelve months.

Recent Accounting Pronouncements

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The adoption is not expected to have a material impact on the Company's financial position, results of operations, and disclosures.

In January 2020, the FASB issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321,

Topic 323, and Topic 815. This guidance addresses accounting for the transition into and out of the equity method and provides clarification of the interaction of rules for equity securities, the equity method of accounting, and forward contracts and purchase options on certain types of securities. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020. Early adoption is permitted. ASU 2020-01 is effective for NetScout beginning April 1, 2021. The Company is currently assessing the effect that ASU 2020-01 will have on its financial position, results of operations, and disclosures.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for fiscal years beginning after December 15, 2021. ASU 2019-12 is effective for NetScout beginning April 1, 2022. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company is currently assessing the effect that ASU 2019-12 will have on its financial position, results of operations, and disclosures.

In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. This ASU adds, modifies and clarifies several disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 adds, modifies and removes several disclosure requirements relative to the three levels of inputs used to measure fair value in accordance with Topic 820, Fair Value Measurement. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) and also issued subsequent amendments to the initial guidance: ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-11 and ASU 2020-02 (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held. Topic 326 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. The Company adopted the guidance prospectively as of April 1, 2020. The adoption did not result in a cumulative adjustment to retained earnings and has not had an impact on the Company's consolidated financial statements other than with respect to the updated disclosure requirements.

XML

REVENUE

6 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

Revenue Recognition Policy

The Company exercises judgment and uses estimates in connection with determining the amounts of product and service revenues to be recognized in each accounting period.

The Company derives revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software and service offerings. The majority of the Company's product sales consist of hardware appliances with embedded software that are essential to providing customers the intended functionality of the solutions. The Company also sells software offerings decoupled from the underlying hardware and software solutions to provide customers with enhanced functionality.

The Company accounts for revenue once a legally enforceable contract with a customer has been approved by the parties and the related promises to transfer products or services have been identified. A contract is defined by the Company as an arrangement with commercial substance identifying payment terms, each party’s rights and obligations regarding the products or services to be transferred and the amount the Company deems probable of collection. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. Revenue is recognized when control of the products or services are transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for products and services.

Product revenue is typically recognized upon shipment, provided a legally enforceable contract exists, control has passed to the customer, and in the case of software products, when the customer has the rights and ability to access the software; and collection of the related receivable is probable. If any significant obligations to the customer remain post-delivery, typically involving obligations relating to installation and acceptance by the customer, revenue recognition is deferred until such

obligations have been fulfilled. The Company's service offerings include installation, integration, extended warranty and maintenance services, post-contract customer support, stand-ready software-as-a-service (SAAS) and other professional services including consulting and training. The Company generally provides software and/or hardware support as part of product sales. Revenue related to the initial bundled software and hardware support is recognized ratably over the support period. In addition, customers can elect to purchase extended support agreements for periods after the initial software/hardware warranty expiration. Support services generally include rights to unspecified upgrades (when and if available), telephone and internet-based support, updates, bug fixes and hardware repair and replacement. Consulting services are recognized upon delivery or completion of performance depending on the terms of the underlying contract. Reimbursements of out-of-pocket expenditures incurred in connection with providing consulting services are included in services revenue, with the offsetting expense recorded in cost of service revenue. Training services include on-site and classroom training. Training revenues are recognized upon delivery of the training.

Generally, the Company's contracts are accounted for individually. However, when contracts are closely interrelated and dependent on each other, it may be necessary to account for two or more contracts as one to reflect the substance of the group of contracts.

Bundled arrangements are concurrent customer purchases of a combination of the Company's product and service offerings that may be delivered at various points in time. The Company allocates the transaction price among the performance obligations in an amount that depicts the relative standalone selling prices (SSP) of each obligation. Judgment is required to determine the SSP for each distinct performance obligation. The Company uses a range of amounts to estimate SSP when it sells each of the products and services separately based on the element’s historical pricing. The Company also considers its overall pricing objectives and practices across different sales channels and geographies, and market conditions. Generally, the Company has established SSP for a majority of its service elements based on historical standalone sales. In certain instances, the Company has established SSP for services based upon an estimate of profitability and the underlying cost to fulfill those services. Further, for certain service engagements, the Company considers quoted prices as part of multi-element arrangements of those engagements as a basis for establishing SSP. SSP has been established for product elements as the average or median selling price the element was recently sold for, whether sold alone or sold as part of a multiple element transaction. The Company reviews sales of the product elements on a quarterly basis and updates, when appropriate, its SSP for such elements to ensure that it reflects recent pricing experience. The Company's products are distributed through its direct sales force and indirect distribution channels through alliances with resellers and distributors. Revenue arrangements with resellers and distributors are recognized on a sell-in basis; that is, when control of the product transfers to the reseller or distributor. The Company records consideration given to a customer as a reduction of revenue to the extent they have recorded revenue from the customer. With limited exceptions, the Company's return policy does not allow product returns for a refund. Returns have been insignificant to date. In addition, the Company has a history of successfully collecting receivables from its resellers and distributors.

During the six months ended September 30, 2020, the Company recognized revenue of $165.7 million related to the Company's deferred revenue balance reported at March 31, 2020.

Performance Obligations

Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. The transaction price is allocated among performance obligations in bundled contracts in an amount that depicts the relative standalone selling prices of each obligation.

For contracts involving distinct hardware and software licenses, the performance obligations are satisfied at a point in time when control is transferred to the customer. For standalone maintenance and post-contract support (PCS) the performance obligation is satisfied ratably over the contract term as a stand-ready obligation. For consulting and training services, the performance obligation may be satisfied over the contract term as a stand-ready obligation, satisfied over a period of time as those services are delivered, or satisfied at the completion of the service when control has transferred, or the services have expired unused.

Payments for hardware, software licenses, one-year maintenance, PCS and consulting services, are typically due up front with payment terms of 30 to 90 days. However, the Company does have contracts pursuant to which billings occur ratably over a period of years following the transfer of control for the contracted performance obligations. Payments on multi-year maintenance, PCS and consulting services are typically due in annual installments over the contract term. The Company did not have any material variable consideration such as obligations for returns, refunds or warranties at September 30, 2020.

At September 30, 2020, the Company had total deferred revenue of $335.8 million, which represents the aggregate total contract price allocated to undelivered performance obligations. The Company expects to recognize $236.2 million, or 70%, of this revenue during the next 12 months, and expects to recognize the remaining $99.6 million, or 30%, of this revenue thereafter.

Because of NetScout's revenue recognition policies, there are circumstances for which the Company does not recognize revenue relating to sales transactions that have been billed, and the related account receivable has not been collected. While the receivable represents an enforceable obligation, for balance sheet presentation purposes, the Company has not recognized the deferred revenue, or the related account receivable and no amounts appear in the consolidated balance sheets for such transactions because control of the underlying deliverable has not transferred. The aggregate amount of unrecognized accounts receivable and deferred revenue was $5.7 million and $11.1 million at September 30, 2020 and March 31, 2020, respectively.

NetScout expects that the amount of billed and unbilled deferred revenue will change from quarter to quarter for several reasons, including the specific timing, duration and size of large customer support and service agreements, varying billing cycles of such agreements, the specific timing of customer renewals, and foreign currency fluctuations. The Company did not have any significant financing components, or variable consideration or performance obligations satisfied in a prior period recognized during the six months ended September 30, 2020.

Contract Balances

The Company may receive payments from customers based on a billing schedule as established by the Company's contracts. Contract assets relate to performance obligations where control has transferred to the customer in advance of scheduled billings. The Company records unbilled accounts receivable representing the right to consideration in exchange for goods or services that have been transferred to a customer conditional on the passage of time. Deferred revenue relates to payments received in advance of performance under the contract.

Costs to Obtain Contracts

The Company has determined that the only significant incremental costs incurred to obtain contracts with customers within the scope of Topic 606 are sales commissions paid to its employees. Sales commissions are recorded as an asset and amortized to expense ratably over the remaining performance periods of the related contracts with remaining performance obligations. The Company expenses costs as incurred for sales commissions when the amortization period would have been one year or less.

At September 30, 2020, the consolidated balance sheet included $7.5 million in assets related to sales commissions to be expensed in future periods. A balance of $4.5 million was included in prepaid expenses and other current assets, and a balance of $3.0 million was included in other assets in the Company's consolidated balance sheet at September 30, 2020. At March 31, 2020, the consolidated balance sheet included $7.2 million in assets related to sales commissions to be expensed in future periods. A balance of $3.9 million was included in prepaid expenses and other current assets, and a balance of $3.3 million was included in other assets in the Company's consolidated balance sheet at March 31, 2020.

During the three and six months ended September 30, 2020 and 2019, respectively, the Company recognized $1.5 million, $1.6 million, $3.1 million and $3.2 million of amortization related to this sales commission asset, which is included in the sales and marketing expense line in the Company's consolidated statements of operations.

Allowance for Doubtful Accounts

The Company continually monitors collections from its customers. The Company evaluates the collectability of its accounts receivable and determines the appropriate allowance for doubtful accounts based on a combination of factors, including but not limited to, analysis of the aging schedules, past due balances, historical collection experience and prevailing economic conditions.

The following table summarizes the activity in the allowance for doubtful accounts (in thousands):

Balance at March 31, 2020	$	1,350
Provision for allowance for doubtful accounts	25
Recoveries and other adjustments	(533)
Write off charged against the allowance for doubtful accounts	(60)
Balance at September 30, 2020	$	782

XML

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

6 Months Ended

Sep. 30, 2020

Risks and Uncertainties [Abstract]

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS

CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERSFinancial instruments that potentially subject the Company to concentration of credit risk consist primarily of investments, trade accounts receivable and accounts payable. The Company's cash, cash equivalents, and marketable securities are placed with financial institutions with high credit standings.

At September 30, 2020, the Company had one direct customer who 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. At March 31, 2020, the Company had no direct customers or indirect channel partners which accounted for more than 10% of the accounts receivable balance.

During the three and six months ended September 30, 2020 and 2019, no direct customers or indirect channel partners accounted for more than 10% of the Company's total revenue.

Historically, the Company has not experienced any significant failure of its customers' ability 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

SHARE-BASED COMPENSATION

6 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION

The following is a summary of share-based compensation expense including restricted stock units granted pursuant to the Company's 2007 Equity Incentive Plan, as amended (Amended 2007 Plan), and 2019 Equity Incentive Plan (2019 Plan) and employee stock purchases made under the Company's 2011 Employee Stock Purchase Plan, as amended, (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Cost of product revenue	$	344	$	345	$	589	$	612
Cost of service revenue	1,810		1,842		3,160		3,309
Research and development	4,935		4,820		8,716		8,639
Sales and marketing	5,357		5,288		9,349		9,423
General and administrative	3,290		3,562		6,018		6,617
	$	15,736	$	15,857	$	27,832	$	28,600

On September 12, 2019, the Company’s stockholders approved the 2019 Plan, which replaced the Company’s Amended 2007 Plan. The 2019 Plan permits the granting of incentive and nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, and other stock awards, collectively referred to as "share-based awards." On September 10, 2020, the Company's stockholders approved an amendment and restatement of the 2019 Equity Incentive Plan (the Amended 2019 Plan) to increase the number of shares of shares authorized for issuance under the Amended 2019 Plan by 4,700,000. A total of 11,494,651 shares are reserved for issuance under the Amended 2019 Plan. Periodically, the Company grants share-based awards to employees, officers, and directors of the Company and its subsidiaries. The Company accounts for these share-based awards in accordance with GAAP, which requires the measurement and recognition of compensation expense based on estimated fair values for all share-based payment awards made to its employees and directors. Share-based award grants are generally measured at fair value on the date of grant based on the number of shares granted and the quoted price of the Company’s common stock. Such value is recognized as a cost of revenue or an operating expense over the corresponding vesting period.

Employee Stock Purchase Plan – The Company maintains the ESPP for all eligible employees as described in the Company's Annual Report on Form 10-K for the year ended March 31, 2020. 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 1st through August 31st and from September 1st through the last day of February each year. During the six months ended September 30, 2020, employees purchased 279,812 shares under the ESPP and the value per share was $23.14.

XML

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES

6 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIESThe 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 at September 30, 2020 and U.S. government and municipal obligations, commercial paper, money market instruments and cash maintained with various financial institutions at March 31, 2020.

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):

	September 30, 2020		March 31, 2020		September 30, 2019		March 31, 2019
Cash and cash equivalents	$	415,719	$	338,489	$	245,064	$	409,632
Restricted cash	748		1,748		1,000		188
Total cash, cash equivalents and restricted cash	$	416,467	$	340,237	$	246,064	$	409,820

The Company's restricted cash includes cash balances which are legally or contractually restricted. The Company's restricted cash is included within prepaid and other current assets and consists of amounts related to holdbacks associated with prior acquisitions.

Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	3,585	$	29	$	3,614
Commercial paper	6,595		—		6,595
Corporate bonds	1,908		10		1,918
Total short-term marketable securities	12,088		39		12,127
Total long-term marketable securities	—		—		—
Total marketable securities	$	12,088	$	39	$	12,127

The following is a summary of marketable securities held by NetScout at March 31, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	28,621	$	107	$	28,728
Commercial paper	14,644		—		14,644
Corporate bonds	4,587		10		4,597
Total short-term marketable securities	47,852		117		47,969
U.S. government and municipal obligations	2,562		51		2,613
Total long-term marketable securities	2,562		51		2,613
Total marketable securities	$	50,414	$	168	$	50,582

Contractual maturities of the Company's marketable securities held at September 30, 2020 and March 31, 2020 were as follows (in thousands):

	September 30, 2020		March 31, 2020
Available-for-sale securities:
Due in 1 year or less	$	12,127	$	47,969
Due after 1 year through 5 years	—		2,613
	$	12,127	$	50,582

XML

FAIR VALUE MEASUREMENTS

6 Months Ended

Sep. 30, 2020

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 September 30, 2020 and March 31, 2020 (in thousands):

	Fair Value Measurements at
	September 30, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	415,719	$	—	$	—	$	415,719
U.S. government and municipal obligations	2,576		1,038		—		3,614
Commercial paper	—		6,595		—		6,595
Corporate bonds	1,918		—		—		1,918
Derivative financial instruments	—		151		—		151
	$	420,213	$	7,784	$	—	$	427,997
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(748)	$	(748)
	$	—	$	—	$	(748)	$	(748)

	Fair Value Measurements at
	March 31, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	338,489	$	—	$	—	$	338,489
U.S. government and municipal obligations	31,341		—		—		31,341
Commercial paper	—		14,644		—		14,644
Corporate bonds	4,597		—		—		4,597
	$	374,427	$	14,644	$	—	$	389,071
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(1,748)	$	(1,748)
Derivative financial instruments	—		(49)		—		(49)
	$	—	$	(49)	$	(1,748)	$	(1,797)

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 calculated using market observable data for similar but not identical instruments, or a discounted cash flow model using the contractual interest rate as compared to the underlying interest yield curve. 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. 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's Level 3 liabilities consists of contingent purchase considerations.

The Company had a contingent liability at September 30, 2020 and March 31, 2020 for $0.7 million related to the acquisition of Gigavation Incorporated (Gigavation) in February 2020. The contingent purchase consideration represents

amounts deposited into an escrow account which was established to cover damages NetScout may suffer related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. The $0.7 million of contingent purchase consideration was included in accrued other in the Company’s consolidated balance sheet at September 30, 2020 and March 31, 2020. Except to the extent that valid indemnification claims are made prior to such time, the $0.7 million will be paid to the seller in February 2021.

The Company had a contingent liability at March 31, 2020 related to the acquisition of Eastwind Networks, Inc. (Eastwind) in April 2019. The contingent purchase consideration represented amounts deposited into an escrow account which was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. The contingent purchase consideration of $1.0 million was included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The contingent purchase consideration of $1.0 million was paid to the seller in April 2020.

The following table sets forth a reconciliation of changes in the fair value of the Company's Level 3 financial liabilities for the six months ended September 30, 2020 (in thousands):

	Contingent Purchase Consideration
Balance at March 31, 2020	$	(1,748)
Payments made	1,000
Balance at September 30, 2020	$	(748)

XML

INVENTORIES

6 Months Ended

Sep. 30, 2020

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):

	September 30, 2020		March 31, 2020
Raw materials	$	16,267	$	15,311
Work in process	125		819
Finished goods	6,057		5,376
Deferred costs	3,774		721
	$	26,223	$	22,227

XML

ACQUISITIONS & DIVESTITURES

6 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

ACQUISITIONS & DIVESTITURES

ACQUISITIONS & DIVESTITURES

Gigavation Acquisition

On February 5, 2020 (the Gigavation Closing Date), the Company acquired 100% of the common stock of Gigavation Incorporated, a cybersecurity company for $8.0 million. Gigavation's solutions provide security to device communication protocols, end point protection and security analytics. The Gigavation technology and engineering talent have been integrated into our service assurance products in order to support the ongoing enhancement of that products portfolio.

Goodwill of $3.8 million was recognized for the excess purchase price over the fair value of the net assets acquired. Goodwill and intangible assets recorded as part of the acquisition are not deductible for tax purposes.

Eastwind Acquisition

    On April 3, 2019 (the Eastwind Closing Date), the Company completed the acquisition of certain assets and liabilities of Eastwind for $5.2 million. Eastwind's breach analytics cloud analyzes data to identify malicious activity, insider threats and data leakage.

    Goodwill of $1.0 million was recognized for the excess purchase price over the fair value of the net assets acquired. Goodwill and intangible assets recorded as part of the acquisition are deductible for tax purposes.

HNT Tools Business Divestiture

    On September 14, 2018 (the HNT Divestiture Date), the Company divested its Handheld Network Tools (HNT) business. As part of the divestiture, the Company recorded contingent consideration which represents potential future earnout payments of up to $4.0 million over two years that are contingent on the achievement of certain milestones by the HNT business. The

Company recorded a $0.5 million change in the fair value of the contingent consideration, which is included in other income (expense), net within the Company’s consolidated statements of operations for the six months ended September 30, 2019. The fair value of the contingent consideration was $0 at September 30, 2020 and March 31, 2020.     In connection with the divestiture, the Company entered into a transitional services agreement with the buyer to provide certain services for a period of up to eighteen months. The transitional services agreement ended in fiscal year 2020. Income associated with the transitional services agreement for the three and six months ended September 30, 2020 and 2019 was $0.1 million, $0.3 million, $0.1 million, and $1.2 million, respectively. Transitional services agreement income is included within other income (expense), net in the Company's consolidated statements of operations.

XML

GOODWILL AND INTANGIBLE ASSETS

6 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS

Goodwill

The Company assesses goodwill for impairment at the 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 Company completed its annual impairment test on January 31, 2020. During the fourth quarter of fiscal year 2020, the Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic to be a triggering event. As such, the Company performed a quantitative analysis as of March 31, 2020. The quantitative impairment test indicated goodwill was not impaired as of March 31, 2020.

Reporting units are determined based on the components of a Company's operating segments that constitute a business for which financial information is available and for which operating results are regularly reviewed by segment management. Through the first half of fiscal year 2020, the Company had two reporting units: (1) Service Assurance and (2) Security. As part of its continued integration efforts, effective during the third quarter of fiscal year 2020, the Company reorganized its business units. As a result of this change, the Company reduced the number of reporting units from two reporting units to one reporting unit. The former Service Assurance and Security reporting units were combined as result of organizational changes made to fully integrate the resources and assets of the Service Assurance and Security business units. The Company completed an assessment of any potential impairment for all reporting units immediately prior to and after the reporting unit change and determined that no impairment existed.

At September 30, 2020 and March 31, 2020, the carrying amount of goodwill was $1.7 billion. The change in the carrying amount of goodwill for the six months ended September 30, 2020 was 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 following table summarizes the changes in the carrying amount of goodwill for the six months ended September 30, 2020 as follows (in thousands):

Balance at March 31, 2020	$	1,725,680
Foreign currency translation impact	(7,085)
Balance at September 30, 2020	$	1,718,595

Intangible Assets

The net carrying amounts of intangible assets were $551.8 million and $582.2 million at September 30, 2020 and March 31, 2020, 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 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. The Company completed its annual impairment test on January 31, 2020. During the fourth quarter of fiscal year 2020, the Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic and concluded that it was not more likely than not that the trade name was impaired and therefore a quantitative Step 1 assessment was not performed as of March 31, 2020.

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at September 30, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	251,824	$	(203,010)	$	48,814
Customer relationships	775,018		(305,680)		469,338
Distributor relationships and technology licenses	11,454		(7,233)		4,221
Definite-lived trademark and trade name	39,394		(28,960)		10,434
Core technology	7,192		(7,133)		59
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,461		(16,461)		—
Capitalized software	3,317		(3,255)		62
Other	1,208		(953)		255
	$	1,106,996	$	(573,813)	$	533,183

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	249,675	$	(191,876)	$	57,799
Customer relationships	767,366		(275,361)		492,005
Distributor relationships and technology licenses	6,785		(6,321)		464
Definite-lived trademark and trade name	39,059		(26,246)		12,813
Core technology	7,192		(7,074)		118
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,223		(16,223)		—
Capitalized software	3,317		(3,202)		115
Other	1,208		(943)		265
	$	1,091,953	$	(528,374)	$	563,579

Amortization included as cost of product revenue consists of amortization of developed technology, distributor relationships and technology licenses, core technology and software. Amortization included as operating expense consists of all other intangible assets. The following table provides a summary of amortization expense for the three and six months ended September 30, 2020 and 2019, respectively (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Amortization of intangible assets included as:
Cost of product revenue	$	5,320	$	6,677	$	10,333	$	13,479
Operating expense	15,368		16,137		30,634		32,285
	$	20,688	$	22,814	$	40,967	$	45,764

The following is the expected future amortization expense at September 30, 2020 for the fiscal years ending March 31 (in thousands):

2021 (remaining six months)	$	40,544
2022	71,466
2023	63,731
2024	55,485
2025	48,421
Thereafter	253,536
	$	533,183

The weighted-average amortization period of developed technology and core technology is 11.2 years. The weighted-average amortization period for customer and distributor relationships is 15.9 years. The weighted-average amortization period for trademarks and trade names is 8.6 years. The weighted-average amortization period for capitalized software is 3.0 years. The weighted-average amortization period for amortizing all intangible assets is 14.6 years.

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

6 Months Ended

Sep. 30, 2020

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.

NetScout also periodically enters into forward contracts to manage exchange rate risks associated with certain third-party transactions and for which the Company does not elect hedge accounting treatment as there is no difference in the timing of gain or loss recognition on the hedging instrument and the hedged item.

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 September 30, 2020 and March 31, 2020 were as follows (in thousands):

	Notional Amounts (a)				Prepaid Expenses and Other Current Assets				Accrued Other
	September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020
Derivatives Designated as Hedging Instruments:
Forward contracts	$	3,516	$	1,722	$	105	$	—	$	—	$	49
Derivatives Not Designated as Hedging Instruments:
Forward contracts	6,566		—		46		—		—		—
					$	151	$	—	$	—	$	49

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

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	236	$	(27)	Research and development	$	(22)	$	(4)
					Sales and marketing	(115)		28
	$	236	$	(27)		$	(137)	$	24

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	247	$	(101)	Research and development	$	(13)	$	(8)
					Sales and marketing	(81)		78
	$	247	$	(101)		$	(94)	$	70

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

XML

LONG-TERM DEBT

6 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBTOn January 16, 2018, the Company amended and expanded its existing credit agreement (Amended Credit Agreement) with a syndicate of lenders by and among: the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and

collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Fifth Third Bank, Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Amended Credit Agreement provides for a five-year, $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. The Company may elect to use the new credit facility for general corporate purposes or to finance the repurchase of up to twenty-five million shares of the Company's common stock under the Company's common stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. At September 30, 2020, $450 million was outstanding under the Amended Credit Agreement.

At the Company's election, revolving loans under the Amended Credit Agreement bear interest at either (a) an Alternate Base Rate per annum equal to the greatest of (1) JPMorgan's prime rate, (2) 0.50% in excess of the New York Federal Reserve Bank (NYFRB) rate, or (3) an adjusted one month LIBOR rate plus 1%; or (b) such adjusted LIBOR rate (for the interest period selected by the Company), in each case plus an applicable margin. For the period from the delivery of the Company's financial statements for the quarter ended June 30, 2020, until the Company has delivered financial statements for the quarter ended September 30, 2020, the applicable margin will be 1.50% per annum for LIBOR loans and 0.50% per annum for Alternate Base Rate loans, and thereafter the applicable margin will vary depending on the Company's leverage ratio, ranging from 1.00% per annum for Base Rate loans and 2.00% per annum for LIBOR loans if the Company's consolidated leverage ratio is greater than 3.50 to 1.00, down to 0.00% per annum for Alternate Base Rate loans and 1.00% per annum for LIBOR loans if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00.

On July 27, 2017, the U.K. Financial Conduct Authority (FCA) announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. The Company's Amended Credit Agreement provides for the Administrative Agent to determine if (i) adequate and reasonable means do not exist for ascertaining the LIBOR rate or (ii) the FCA or Government Authority having jurisdiction over the Administrative Agent has made a public statement identifying a specific date after which the LIBOR rate shall no longer be used for determining interest rates for loans and the Administrative Agent determines that (i) and (ii) above are unlikely to be temporary, then the Administrative Agent and the Company would agree to transition to an Alternate Base Rate borrowing as described above or amend the Credit Agreement to establish an alternate rate of interest to LIBOR that gives due consideration to the then prevailing market convention for determining a rate of interest for syndicated loans in the United States at such time.

The Company's consolidated leverage ratio is the ratio of its total funded debt compared to its consolidated adjusted EBITDA. Consolidated adjusted EBITDA includes certain adjustments, including, without limitation, adjustments relating to extraordinary, unusual or non-recurring charges, certain restructuring charges, non-cash charges, certain transaction costs and expenses and certain pro forma adjustments in connection with material acquisitions and dispositions, all as set forth in detail in the definition of consolidated adjusted EBITDA in the Amended Credit Agreement.

Commitment fees will accrue on the daily unused amount of the credit facility. For the period from the delivery of the Company's financial statements for the quarter ended June 30, 2020 until the Company has delivered financial statements for the quarter ended September 30, 2020, the commitment fee will be 0.25% per annum, and thereafter the commitment fee will vary depending on the Company's consolidated leverage ratio, ranging from 0.30% per annum if the Company's consolidated leverage ratio is greater than 2.75 to 1.00, down to 0.15% per annum if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00.

Letter of credit participation fees are payable to each lender on the amount of such lender’s letter of credit exposure, during the period from the closing date of the Amended Credit Agreement to but excluding the date which is the later of (i) the date on which such lender’s commitment terminates or (ii) the date on which such lender ceases to have any letter of credit exposure, at a rate per annum equal to the applicable margin for LIBOR loans. Additionally, the Company will pay a fronting fee to each issuing bank in amounts to be agreed to between the Company and the applicable issuing bank.

Interest on Alternate Base Rate loans is payable at the end of each calendar quarter. Interest on LIBOR loans is payable at the end of each interest rate period or at the end of each three-month interval within an interest rate period if the period is longer than three months. The Company may also prepay loans under the Amended 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 and other obligations under the credit facility are (a) guaranteed by each of the Company's wholly owned material domestic restricted subsidiaries, subject to certain exceptions, and (b) are secured by substantially all of the assets of the Company and the subsidiary guarantors, including a pledge of all the capital stock of material subsidiaries held directly by the Company and the subsidiary guarantors (which pledge, in the case of any foreign subsidiary, is limited to 65% of the voting

stock), subject to certain customary exceptions and limitations. The Amended Credit Agreement generally prohibits any other liens on the assets of the Company and its restricted subsidiaries, subject to certain exceptions as described in the Amended Credit Agreement.

The Amended Credit Agreement contains certain covenants applicable to the Company and its restricted subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes, dividends and distributions, investments (including acquisitions), transactions with affiliates, asset sales, including sale-leaseback transactions, speculative hedge agreements, payment of junior financing, 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. These covenants and limitations are more fully described in the Amended Credit Agreement. At September 30, 2020, the Company was in compliance with all of these covenants.

The Amended Credit Agreement provides that events of default will exist in certain circumstances, including failure to make payment of principal or interest on the loans when required, failure to perform certain obligations under the Amended Credit Agreement and related documents, defaults under certain other indebtedness, certain insolvency events, certain events arising under ERISA, a change of control and certain other events. Upon an event of default, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may, terminate the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents.

In connection with the Company's Amended Credit Agreement described above, the Company terminated its previous term loan dated as of July 14, 2015, by and among the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Company has capitalized debt issuance costs totaling $12.2 million at September 30, 2020, which are being amortized over the life of the revolving credit facility. The unamortized balance was $4.0 million as of September 30, 2020. The balance of $1.7 million was included as prepaid expenses and other current assets and a balance of $2.3 million was included as other assets in the Company's consolidated balance sheet.

XML

RESTRUCTURING CHARGES

6 Months Ended

Sep. 30, 2020

Restructuring and Related Activities [Abstract]

RESTRUCTURING CHARGES

RESTRUCTURING CHARGES

During the second quarter of the fiscal year ended March 31, 2019, the Company implemented a voluntary separation program (VSP) for employees who met certain age and service requirements to reduce overall headcount resulting in a total restructuring charge for the program of $17.3 million. As a result of the related workforce reduction, one hundred fifty-five employees voluntarily terminated their employment with the Company. As a result of the related workforce reduction, during the six months ended September 30, 2019, the Company recorded restructuring charges totaling $0.1 million related to one-time termination benefits for employees who voluntarily terminated their employment with the Company during the period. The one-time termination benefits were paid in full by the end of the first quarter of the fiscal year ended March 31, 2020.

During the fiscal year ended March 31, 2020, the Company approved two restructuring plans. During the second quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions resulting in a total restructuring charge for the program of $0.5 million. As a result of the workforce reduction, during the six months ended September 30, 2019, the Company recorded a restructuring charge totaling $0.2 million related to one-time termination benefits. The one-time termination benefits were paid in full during the first quarter of the fiscal year ending March 31, 2021. During the fourth quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions. As a result of the workforce reduction, the Company recorded a restructuring charge totaling $2.1 million during the fiscal year ended March 31, 2020 and an additional $0.1 million during the six months ended September 30, 2020. The one-time termination benefits were paid in full by the end of the second quarter of the fiscal year ending March 31, 2021.

The following table provides a summary of the activity related to the restructuring plans and the related restructuring liabilities (in thousands):

	Q2FY20 Plan		Q4FY20 Plan
	Employee-Related		Employee-Related		Total
Balance at March 31, 2020	$	3	$	1,717	$	1,720
Restructuring charges to operations	—		62		62
Cash payments	(3)		(1,860)		(1,863)
Other adjustments	—		81		81
Balance at September 30, 2020	$	—	$	—	$	—

XML

LEASES

6 Months Ended

Sep. 30, 2020

Leases [Abstract]

LEASES

LEASES

The Company determines if an arrangement is a lease at inception. ROU assets represent the Company’s right to use an underlying asset for the duration of the lease term. Lease liabilities represent the Company’s contractual obligation to make lease payments over the lease term. ROU assets are recorded and recognized at commencement for the lease liability amount, plus initial direct costs incurred less lease incentives received. Lease liabilities are recorded at the present value of future lease payments over the lease term at commencement. The discount rate used is generally the Company’s estimated incremental borrowing rate unless the lessor’s implicit rate is readily determinable. Incremental borrowing rates are calculated periodically to estimate the rate the Company would pay to borrow the funds necessary to obtain an asset of similar value over a similar term. Lease expenses relating to operating leases are recognized on a straight-line basis over the lease term.

The Company has operating leases for administrative, research and development, sales and marketing and manufacturing facilities and equipment under various non-cancelable lease agreements. The Company’s leases have remaining lease terms ranging from 1 year to 11 years. The Company’s lease terms may include options to extend or terminate the lease where it is reasonably certain that the Company will exercise those options. The Company considers several economic factors when making this determination, including but not limited to, the significance of leasehold improvements incurred in the office space, the difficulty in replacing the asset, underlying contractual obligations, or specific characteristics unique to a particular lease. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Most of the Company’s lease agreements contain variable payments, primarily for common area maintenance (CAM), which are expensed as incurred and not included in the measurement of the ROU assets and lease liabilities.

The components of operating lease cost for the three and six months ended September 30, 2020 and 2019 were as follows (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Lease cost under long-term operating leases	$	3,263	$	3,276	$	6,525	$	6,521
Lease cost under short-term operating leases	1,567		897		2,380		1,749
Variable lease cost under short-term and long-term operating leases	1,068		1,063		1,950		2,275
Total operating lease cost	$	5,898	$	5,236	$	10,855	$	10,545

The table below presents supplemental cash flow information related to leases during the six months ended September 30, 2020 and 2019 (in thousands):

	September 30, 2020		September 30, 2019
Right-of-use assets obtained in exchange for new operating lease liabilities	$	1,794	$	2,049

At September 30, 2020 and March 31, 2020, the weighted average remaining lease term in years and weighted average discount rate were as follows:

	September 30, 2020		March 31, 2020
Weighted average remaining lease term in years - operating leases	8.09		8.59
Weighted average discount rate - operating leases	4.1	%	4.1	%

Future minimum payments under non-cancellable leases at September 30, 2020 are as follows (in thousands):

Year ending March 31:
2021 (remaining six months)	$	6,141
2022	14,507
2023	12,339
2024	10,216
2025	10,057
Thereafter	38,364
Total lease payments	$	91,624
Less imputed interest	(13,626)
Present value of lease liabilities	$	77,998

XML

COMMITMENTS AND CONTINGENCIES

6 Months Ended

Sep. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Acquisition related - The Company had a contingent liability at September 30, 2020 for $0.7 million related to the acquisition of Gigavation in February 2020 for which an escrow account was established to cover damages NetScout may suffer related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. Except to the extent that valid indemnification claims are made prior to such time, the $0.7 million will be paid to the seller in February 2021. The contingent purchase consideration of $0.7 million was included as accrued other in the Company's consolidated balance sheet at September 30, 2020 and March 31, 2020.

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 material adverse effect on the Company’s financial condition, results of operations or cash flows.

As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against NetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’s Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. NetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’s patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. Following the entry of final judgment, on June 12, 2019, NetScout filed its Notice of Appeal. On July 14, 2020, the Court of Appeals for the Federal Circuit issued a decision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. NetScout continues to avail itself of its legal options. NetScout has concluded that the risk of loss associated with the post-suit damages award is "probable" in accounting terms, regardless of the options NetScout may pursue, and that the risk of loss associated with pre-suit damages is now remote. Accounting rules require NetScout to provide an estimate for the range of potential liability. NetScout currently estimates that the range of liability is the sum of post-suit damages, plus pre- and post-judgment interest amounts and royalties owed on post-trial sales of the accused G10 and GeoBlade products. Any potential enhancement is not reasonably estimable but is likely within the range of $0 to $2,800,000.

Other Contingent Liability - During fiscal year 2020, one of the Company's subsidiaries, located in the United Kingdom (UK), determined that value added tax (VAT) was not properly applied to certain supplies of service to the UK. The Company filed a blank disclosure with HM Revenue & Customs (HMRC) notifying HMRC of these application differences, and subsequently filed a voluntary disclosure agreement (VDA). The VDA covered the period of March 1, 2016 through February 29, 2020. The penalties associated with the application differences can range from 0%-30% of the underpayment and are based on objective and subjective determinations to be made by HMRC. At March 31, 2020 and September 30, 2020 the Company had accrued the penalties that it believes are probable and estimable of assessment by HMRC. A majority of the difference in the Company's application of the VAT rules relates to services for which the subsidiary did not collect VAT from its customers and for which customers would have been eligible to reclaim under the UK VAT regime. Based on these facts, the Company currently believes that it is probable that it will be required to settle these amounts separately with its customers and HMRC; hence, the Company has recorded a liability, which is included as accrued other in the Company's consolidated balance sheet and an asset, which is included in prepaid expenses and other current assets in the Company's consolidated balance sheet at September 30, 2020 for approximately $6.3 million, respectively.

XML

PENSION BENEFIT PLANS

6 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

PENSION BENEFIT PLANS

PENSION BENEFIT PLANS

Certain of the Company's non-U.S. employees participate in noncontributory defined benefit pension plans. None of the Company's employees in the U.S. participate in any noncontributory defined benefit pension plans. In general, these plans are funded based on considerations relating to legal requirements, underlying asset returns, the plan's funded status, the anticipated deductibility of the contribution, local practices, market conditions, interest rates and other factors.

The following sets forth the components of the Company's net periodic pension cost of the noncontributory defined benefit pension plans for the three and six months ended September 30, 2020 and 2019 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Service cost	$	52	$	45	$	104	$	86
Interest cost	93		106		186		202
Net periodic pension cost	$	145	$	151	$	290	$	288

Expected Contributions

During the six months ended September 30, 2020, the Company made contributions of $0.2 million to its defined benefit pension plans. During the fiscal year ending March 31, 2021, the Company's cash contribution requirements for its defined benefit pension plans are expected to be less than $1.0 million. As a majority of the participants within the Company's plans are all active employees, the benefit payments are not expected to be material in the foreseeable future.

XML

TREASURY STOCK

6 Months Ended

Sep. 30, 2020

Equity [Abstract]

TREASURY STOCK

TREASURY STOCK

On October 24, 2017, the Company’s Board of Directors approved a share repurchase program that enables the Company to repurchase up to twenty-five million shares of its common stock. This new program became effective when the Company’s previously disclosed twenty million share repurchase program was completed. The Company is not obligated to acquire any specific amount of common stock within any particular timeframe as a result of this new share repurchase program. 

Through September 30, 2020, the Company has repurchased 17,756,569 shares for $468.7 million in the open market under the twenty-five million share repurchase program. At September 30, 2020, 7,243,431 shares of common stock remained available to be purchased under the current repurchase program. There were no share repurchases during the six months ended September 30, 2020. The Company repurchased 4,160,836 shares for $100.0 million under the twenty-five million share repurchase program during the six months ended September 30, 2019.

In connection with the delivery of shares of the Company's common stock upon vesting of restricted stock units, the Company withheld 481,739 shares and 500,093 shares at a cost of $12.6 million and $11.4 million, respectively, related to minimum statutory tax withholding requirements on these restricted stock units during the six months ended September 30, 2020 and 2019, respectively. These withholding transactions do not fall under the repurchase program described above, and therefore do not reduce the number of shares that are available for repurchase under that program.

XML

NET LOSS PER SHARE

6 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

NET LOSS PER SHARE

NET LOSS PER SHARE

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Numerator:
Net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Denominator:
Denominator for basic net loss per share - weighted average common shares outstanding	73,058		75,687		72,682		76,490
Dilutive common equivalent shares:
Weighted average restricted stock units	—		—		—		—
Denominator for diluted net loss per share - weighted average shares outstanding	73,058		75,687		72,682		76,490
Net loss per share:
Basic net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Diluted net loss per share	(0.05)		(0.23)		(0.29)		(0.61)

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

	Three Months Ended		Six Months Ended
	September 30,		September 30,
	2020	2019	2020	2019
Restricted stock units	536	624	839	897

Basic net loss per share is calculated by dividing net loss 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 net loss per share is calculated by dividing net loss 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 and unrecognized compensation expense as additional proceeds. As the Company incurred a net loss during the three and six months ended September 30, 2020 and 2019, all outstanding restricted stock units have an anti-dilutive effect and are therefore excluded from the computation of diluted weighted average shares outstanding.

XML

INCOME TAXES

6 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Generally, the Company's effective tax rate differs from the statutory tax rate due to state income taxes, foreign withholding taxes, and US taxation on foreign earnings, which are partially offset by research and development tax credits, foreign tax credits and the Foreign Derived Intangible Income deduction.

The Company's effective income tax rates were 1,057.4% and 60.1% for the three months ended September 30, 2020 and 2019, respectively. The effective tax rate for the three months ended September 30, 2020 differed from the effective tax rate for the three months ended September 30, 2019, primarily due to generating a significant pre-tax loss in the three months ended September 30, 2019 when compared to the pre-tax income generated during the three months ended September 30, 2020.

The Company's effective income tax rates were 11.8% and 17.7% for the six months ended September 30, 2020 and 2019, respectively. The effective tax rate for the six months ended September 30, 2020 differed from the effective tax rate for the six months ended September 30, 2019, primarily due to a significant discrete tax expense related to elections made to treat several of the Company's foreign subsidiaries as U.S. branches for federal income tax purposes in the six months ended September 30, 2019. As a result, the Company recorded additional tax expense for the three and six months ended September 30, 2019 due to establishing new U.S. net deferred tax liabilities resulting from the differences between the GAAP basis and the U.S. federal tax basis of the existing assets and liabilities of those foreign subsidiaries.

XML

SEGMENT AND GEOGRAPHIC INFORMATION

6 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

SEGMENT AND GEOGRAPHIC INFORMATION

SEGMENT AND GEOGRAPHIC INFORMATION

The Company reports revenues and income under one reportable segment.

The Company manages its business in the following geographic areas: United States, Europe, Asia and the rest of the world. The Company's policies mandate compliance with economic sanctions and the export controls.

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
United States	$	120,027	$	139,544	$	227,350	$	246,647
Europe	37,990		33,901		72,748		65,210
Asia	13,878		13,138		27,574		25,690
Rest of the world	33,444		29,838		61,482		64,898
	$	205,339	$	216,421	$	389,154	$	402,445

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. Further, the Company determines the geography of its sales after considering where the contract originated. 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

BASIS OF PRESENTATION (Policies)

6 Months Ended

Sep. 30, 2020

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. (NetScout or the Company). Certain information and footnote disclosures normally included in financial statements prepared under United States 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 and stockholders' equity, results of operations and cash flows. The year-end consolidated balance sheet data and statement of stockholders' equity were derived from the Company's audited financial statements, but do not include all disclosures required by GAAP. The results reported in these unaudited interim consolidated financial statements are not necessarily indicative of results that may be expected for the entire year. All significant intercompany accounts and transactions are eliminated in consolidation.

These unaudited interim 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, 2020 filed with the Securities and Exchange Commission on May 20, 2020.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. The adoption is not expected to have a material impact on the Company's financial position, results of operations, and disclosures.

In January 2020, the FASB issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321,

Topic 323, and Topic 815. This guidance addresses accounting for the transition into and out of the equity method and provides clarification of the interaction of rules for equity securities, the equity method of accounting, and forward contracts and purchase options on certain types of securities. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020. Early adoption is permitted. ASU 2020-01 is effective for NetScout beginning April 1, 2021. The Company is currently assessing the effect that ASU 2020-01 will have on its financial position, results of operations, and disclosures.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for fiscal years beginning after December 15, 2021. ASU 2019-12 is effective for NetScout beginning April 1, 2022. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company is currently assessing the effect that ASU 2019-12 will have on its financial position, results of operations, and disclosures.

In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. This ASU adds, modifies and clarifies several disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 adds, modifies and removes several disclosure requirements relative to the three levels of inputs used to measure fair value in accordance with Topic 820, Fair Value Measurement. The Company adopted the guidance as of April 1, 2020. The adoption has not had a material impact on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) and also issued subsequent amendments to the initial guidance: ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-11 and ASU 2020-02 (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held. Topic 326 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. The Company adopted the guidance prospectively as of April 1, 2020. The adoption did not result in a cumulative adjustment to retained earnings and has not had an impact on the Company's consolidated financial statements other than with respect to the updated disclosure requirements.

Revenue Recognition Policy

Revenue Recognition Policy

The Company exercises judgment and uses estimates in connection with determining the amounts of product and service revenues to be recognized in each accounting period.

The Company derives revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software and service offerings. The majority of the Company's product sales consist of hardware appliances with embedded software that are essential to providing customers the intended functionality of the solutions. The Company also sells software offerings decoupled from the underlying hardware and software solutions to provide customers with enhanced functionality.

The Company accounts for revenue once a legally enforceable contract with a customer has been approved by the parties and the related promises to transfer products or services have been identified. A contract is defined by the Company as an arrangement with commercial substance identifying payment terms, each party’s rights and obligations regarding the products or services to be transferred and the amount the Company deems probable of collection. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. Revenue is recognized when control of the products or services are transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for products and services.

Product revenue is typically recognized upon shipment, provided a legally enforceable contract exists, control has passed to the customer, and in the case of software products, when the customer has the rights and ability to access the software; and collection of the related receivable is probable. If any significant obligations to the customer remain post-delivery, typically involving obligations relating to installation and acceptance by the customer, revenue recognition is deferred until such

obligations have been fulfilled. The Company's service offerings include installation, integration, extended warranty and maintenance services, post-contract customer support, stand-ready software-as-a-service (SAAS) and other professional services including consulting and training. The Company generally provides software and/or hardware support as part of product sales. Revenue related to the initial bundled software and hardware support is recognized ratably over the support period. In addition, customers can elect to purchase extended support agreements for periods after the initial software/hardware warranty expiration. Support services generally include rights to unspecified upgrades (when and if available), telephone and internet-based support, updates, bug fixes and hardware repair and replacement. Consulting services are recognized upon delivery or completion of performance depending on the terms of the underlying contract. Reimbursements of out-of-pocket expenditures incurred in connection with providing consulting services are included in services revenue, with the offsetting expense recorded in cost of service revenue. Training services include on-site and classroom training. Training revenues are recognized upon delivery of the training.

Generally, the Company's contracts are accounted for individually. However, when contracts are closely interrelated and dependent on each other, it may be necessary to account for two or more contracts as one to reflect the substance of the group of contracts.

Bundled arrangements are concurrent customer purchases of a combination of the Company's product and service offerings that may be delivered at various points in time. The Company allocates the transaction price among the performance obligations in an amount that depicts the relative standalone selling prices (SSP) of each obligation. Judgment is required to determine the SSP for each distinct performance obligation. The Company uses a range of amounts to estimate SSP when it sells each of the products and services separately based on the element’s historical pricing. The Company also considers its overall pricing objectives and practices across different sales channels and geographies, and market conditions. Generally, the Company has established SSP for a majority of its service elements based on historical standalone sales. In certain instances, the Company has established SSP for services based upon an estimate of profitability and the underlying cost to fulfill those services. Further, for certain service engagements, the Company considers quoted prices as part of multi-element arrangements of those engagements as a basis for establishing SSP. SSP has been established for product elements as the average or median selling price the element was recently sold for, whether sold alone or sold as part of a multiple element transaction. The Company reviews sales of the product elements on a quarterly basis and updates, when appropriate, its SSP for such elements to ensure that it reflects recent pricing experience. The Company's products are distributed through its direct sales force and indirect distribution channels through alliances with resellers and distributors. Revenue arrangements with resellers and distributors are recognized on a sell-in basis; that is, when control of the product transfers to the reseller or distributor. The Company records consideration given to a customer as a reduction of revenue to the extent they have recorded revenue from the customer. With limited exceptions, the Company's return policy does not allow product returns for a refund. Returns have been insignificant to date. In addition, the Company has a history of successfully collecting receivables from its resellers and distributors.

XML

REVENUE (Tables)

6 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Summary of Allowance for Doubtful Accounts

The following table summarizes the activity in the allowance for doubtful accounts (in thousands):

Balance at March 31, 2020	$	1,350
Provision for allowance for doubtful accounts	25
Recoveries and other adjustments	(533)
Write off charged against the allowance for doubtful accounts	(60)
Balance at September 30, 2020	$	782

XML

SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Compensation Expense

The following is a summary of share-based compensation expense including restricted stock units granted pursuant to the Company's 2007 Equity Incentive Plan, as amended (Amended 2007 Plan), and 2019 Equity Incentive Plan (2019 Plan) and employee stock purchases made under the Company's 2011 Employee Stock Purchase Plan, as amended, (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Cost of product revenue	$	344	$	345	$	589	$	612
Cost of service revenue	1,810		1,842		3,160		3,309
Research and development	4,935		4,820		8,716		8,639
Sales and marketing	5,357		5,288		9,349		9,423
General and administrative	3,290		3,562		6,018		6,617
	$	15,736	$	15,857	$	27,832	$	28,600

XML

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES (Tables)

6 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Cash, Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):

	September 30, 2020		March 31, 2020		September 30, 2019		March 31, 2019
Cash and cash equivalents	$	415,719	$	338,489	$	245,064	$	409,632
Restricted cash	748		1,748		1,000		188
Total cash, cash equivalents and restricted cash	$	416,467	$	340,237	$	246,064	$	409,820

Schedule of Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):

	September 30, 2020		March 31, 2020		September 30, 2019		March 31, 2019
Cash and cash equivalents	$	415,719	$	338,489	$	245,064	$	409,632
Restricted cash	748		1,748		1,000		188
Total cash, cash equivalents and restricted cash	$	416,467	$	340,237	$	246,064	$	409,820

Summary of Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	3,585	$	29	$	3,614
Commercial paper	6,595		—		6,595
Corporate bonds	1,908		10		1,918
Total short-term marketable securities	12,088		39		12,127
Total long-term marketable securities	—		—		—
Total marketable securities	$	12,088	$	39	$	12,127

The following is a summary of marketable securities held by NetScout at March 31, 2020, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	28,621	$	107	$	28,728
Commercial paper	14,644		—		14,644
Corporate bonds	4,587		10		4,597
Total short-term marketable securities	47,852		117		47,969
U.S. government and municipal obligations	2,562		51		2,613
Total long-term marketable securities	2,562		51		2,613
Total marketable securities	$	50,414	$	168	$	50,582

Summary of Contractual Maturities of Marketable Securities

Contractual maturities of the Company's marketable securities held at September 30, 2020 and March 31, 2020 were as follows (in thousands):

	September 30, 2020		March 31, 2020
Available-for-sale securities:
Due in 1 year or less	$	12,127	$	47,969
Due after 1 year through 5 years	—		2,613
	$	12,127	$	50,582

XML

FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Sep. 30, 2020

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 September 30, 2020 and March 31, 2020 (in thousands):

	Fair Value Measurements at
	September 30, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	415,719	$	—	$	—	$	415,719
U.S. government and municipal obligations	2,576		1,038		—		3,614
Commercial paper	—		6,595		—		6,595
Corporate bonds	1,918		—		—		1,918
Derivative financial instruments	—		151		—		151
	$	420,213	$	7,784	$	—	$	427,997
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(748)	$	(748)
	$	—	$	—	$	(748)	$	(748)

	Fair Value Measurements at
	March 31, 2020
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash and cash equivalents	$	338,489	$	—	$	—	$	338,489
U.S. government and municipal obligations	31,341		—		—		31,341
Commercial paper	—		14,644		—		14,644
Corporate bonds	4,597		—		—		4,597
	$	374,427	$	14,644	$	—	$	389,071
LIABILITIES:
Contingent purchase consideration	$	—	$	—	$	(1,748)	$	(1,748)
Derivative financial instruments	—		(49)		—		(49)
	$	—	$	(49)	$	(1,748)	$	(1,797)

Schedule of 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 six months ended September 30, 2020 (in thousands):

	Contingent Purchase Consideration
Balance at March 31, 2020	$	(1,748)
Payments made	1,000
Balance at September 30, 2020	$	(748)

XML

INVENTORIES (Tables)

6 Months Ended

Sep. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):

	September 30, 2020		March 31, 2020
Raw materials	$	16,267	$	15,311
Work in process	125		819
Finished goods	6,057		5,376
Deferred costs	3,774		721
	$	26,223	$	22,227

XML

GOODWILL AND INTANGIBLE ASSETS (Tables)

6 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The following table summarizes the changes in the carrying amount of goodwill for the six months ended September 30, 2020 as follows (in thousands):

Balance at March 31, 2020	$	1,725,680
Foreign currency translation impact	(7,085)
Balance at September 30, 2020	$	1,718,595

Schedule of Intangible Assets

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at September 30, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	251,824	$	(203,010)	$	48,814
Customer relationships	775,018		(305,680)		469,338
Distributor relationships and technology licenses	11,454		(7,233)		4,221
Definite-lived trademark and trade name	39,394		(28,960)		10,434
Core technology	7,192		(7,133)		59
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,461		(16,461)		—
Capitalized software	3,317		(3,255)		62
Other	1,208		(953)		255
	$	1,106,996	$	(573,813)	$	533,183

Intangible assets include the indefinite-lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 2020 (in thousands):

	Cost		Accumulated Amortization		Net
Developed technology	$	249,675	$	(191,876)	$	57,799
Customer relationships	767,366		(275,361)		492,005
Distributor relationships and technology licenses	6,785		(6,321)		464
Definite-lived trademark and trade name	39,059		(26,246)		12,813
Core technology	7,192		(7,074)		118
Net beneficial leases	336		(336)		—
Non-compete agreements	292		(292)		—
Leasehold interest	500		(500)		—
Backlog	16,223		(16,223)		—
Capitalized software	3,317		(3,202)		115
Other	1,208		(943)		265
	$	1,091,953	$	(528,374)	$	563,579

Finite-lived Intangible Assets Amortization Expense

The following table provides a summary of amortization expense for the three and six months ended September 30, 2020 and 2019, respectively (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Amortization of intangible assets included as:
Cost of product revenue	$	5,320	$	6,677	$	10,333	$	13,479
Operating expense	15,368		16,137		30,634		32,285
	$	20,688	$	22,814	$	40,967	$	45,764

Schedule of Expected Future Amortization Expense

The following is the expected future amortization expense at September 30, 2020 for the fiscal years ending March 31 (in thousands):

2021 (remaining six months)	$	40,544
2022	71,466
2023	63,731
2024	55,485
2025	48,421
Thereafter	253,536
	$	533,183

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)

6 Months Ended

Sep. 30, 2020

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 September 30, 2020 and March 31, 2020 were as follows (in thousands):

	Notional Amounts (a)				Prepaid Expenses and Other Current Assets				Accrued Other
	September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020		September 30, 2020		March 31, 2020
Derivatives Designated as Hedging Instruments:
Forward contracts	$	3,516	$	1,722	$	105	$	—	$	—	$	49
Derivatives Not Designated as Hedging Instruments:
Forward contracts	6,566		—		46		—		—		—
					$	151	$	—	$	—	$	49

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

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

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	236	$	(27)	Research and development	$	(22)	$	(4)
					Sales and marketing	(115)		28
	$	236	$	(27)		$	(137)	$	24

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the three months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

The following table provides the effect foreign exchange forward contracts designated as hedging instruments had on other comprehensive income (loss) (OCI) and results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain (Loss) Recognized in OCI on Derivative (a)				Gain (Loss) Reclassified from Accumulated OCI into Income (b)
	September 30, 2020		September 30, 2019		Location	September 30, 2020		September 30, 2019
Forward contracts	$	247	$	(101)	Research and development	$	(13)	$	(8)
					Sales and marketing	(81)		78
	$	247	$	(101)		$	(94)	$	70

(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.

The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company’s results of operations for the six months ended September 30, 2020 and 2019 (in thousands):

	Gain Recognized in Income (a)
	Location	September 30, 2020		September 30, 2019
Forward contracts	General and administrative	$	46	$	—
		$	46	$	—

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

XML

RESTRUCTURING CHARGES (Tables)

6 Months Ended

Sep. 30, 2020

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Liability

The following table provides a summary of the activity related to the restructuring plans and the related restructuring liabilities (in thousands):

	Q2FY20 Plan		Q4FY20 Plan
	Employee-Related		Employee-Related		Total
Balance at March 31, 2020	$	3	$	1,717	$	1,720
Restructuring charges to operations	—		62		62
Cash payments	(3)		(1,860)		(1,863)
Other adjustments	—		81		81
Balance at September 30, 2020	$	—	$	—	$	—

XML

LEASES (Tables)

6 Months Ended

Sep. 30, 2020

Leases [Abstract]

Components of Operating Lease Cost and Supplemental Cash Flow Information

The components of operating lease cost for the three and six months ended September 30, 2020 and 2019 were as follows (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Lease cost under long-term operating leases	$	3,263	$	3,276	$	6,525	$	6,521
Lease cost under short-term operating leases	1,567		897		2,380		1,749
Variable lease cost under short-term and long-term operating leases	1,068		1,063		1,950		2,275
Total operating lease cost	$	5,898	$	5,236	$	10,855	$	10,545

The table below presents supplemental cash flow information related to leases during the six months ended September 30, 2020 and 2019 (in thousands):

	September 30, 2020		September 30, 2019
Right-of-use assets obtained in exchange for new operating lease liabilities	$	1,794	$	2,049

At September 30, 2020 and March 31, 2020, the weighted average remaining lease term in years and weighted average discount rate were as follows:

	September 30, 2020		March 31, 2020
Weighted average remaining lease term in years - operating leases	8.09		8.59
Weighted average discount rate - operating leases	4.1	%	4.1	%

Future Minimum Payments Under Non-Cancellable Leases

Future minimum payments under non-cancellable leases at September 30, 2020 are as follows (in thousands):

Year ending March 31:
2021 (remaining six months)	$	6,141
2022	14,507
2023	12,339
2024	10,216
2025	10,057
Thereafter	38,364
Total lease payments	$	91,624
Less imputed interest	(13,626)
Present value of lease liabilities	$	77,998

XML

PENSION BENEFIT PLANS (Tables)

6 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of Net Periodic Pension Costs of Noncontributory Defined Benefit Pension Plans

The following sets forth the components of the Company's net periodic pension cost of the noncontributory defined benefit pension plans for the three and six months ended September 30, 2020 and 2019 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Service cost	$	52	$	45	$	104	$	86
Interest cost	93		106		186		202
Net periodic pension cost	$	145	$	151	$	290	$	288

XML

NET LOSS PER SHARE (Tables)

6 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

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

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Numerator:
Net loss	$	(3,686)	$	(17,472)	$	(21,106)	$	(46,815)
Denominator:
Denominator for basic net loss per share - weighted average common shares outstanding	73,058		75,687		72,682		76,490
Dilutive common equivalent shares:
Weighted average restricted stock units	—		—		—		—
Denominator for diluted net loss per share - weighted average shares outstanding	73,058		75,687		72,682		76,490
Net loss per share:
Basic net loss per share	$	(0.05)	$	(0.23)	$	(0.29)	$	(0.61)
Diluted net loss per share	(0.05)		(0.23)		(0.29)		(0.61)

Summary of Antidilutive Securities Excluded from Computation of Diluted EPS

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

	Three Months Ended		Six Months Ended
	September 30,		September 30,
	2020	2019	2020	2019
Restricted stock units	536	624	839	897

XML

SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

6 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Summary of Total Revenue by Geography

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

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
United States	$	120,027	$	139,544	$	227,350	$	246,647
Europe	37,990		33,901		72,748		65,210
Asia	13,878		13,138		27,574		25,690
Rest of the world	33,444		29,838		61,482		64,898
	$	205,339	$	216,421	$	389,154	$	402,445

XML

BASIS OF PRESENTATION (Details) - USD ($)	Sep. 30, 2020	Jan. 16, 2018
Summary Of Significant Accounting Policies [Line Items]
Deferred employer payroll taxes	$ 7,400,000
Senior Secured Revolving Credit Facility | Line of Credit
Summary Of Significant Accounting Policies [Line Items]
Current borrowing capacity	317,000,000
Credit facility	$ 1,000,000,000.0	$ 1,000,000,000.0

XML

REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue recognized			$ 165.7
Deferred revenue	$ 335.8		335.8
Unrecognized accounts receivable and deferred revenue	5.7		5.7		$ 11.1
Capitalized contract cost	7.5		7.5		7.2
Amortization of capitalized costs to obtain contracts	1.5	$ 1.6	3.1	$ 3.2
Prepaid Expenses and Other Current Assets
Disaggregation of Revenue [Line Items]
Capitalized contract cost	4.5		4.5		3.9
Other Assets
Disaggregation of Revenue [Line Items]
Capitalized contract cost	$ 3.0		$ 3.0		$ 3.3
Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Maximum
Disaggregation of Revenue [Line Items]
Payment terms			90 days

XML

REVENUE - Performance Obligations (Details) $ in Millions	Sep. 30, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, amount	$ 236.2
Revenue, remaining performance obligation, percentage	70.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, amount	$ 99.6
Revenue, remaining performance obligation, percentage	30.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period

XML

REVENUE - Allowance for Doubtful Accounts (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable beginning balance	$ 1,350
Provision for allowance for doubtful accounts	25
Recoveries and other adjustments	(533)
Write off charged against the allowance for doubtful accounts	(60)
Accounts receivable ending balance	$ 782

XML

SHARE-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 15,736	$ 15,857	$ 27,832	$ 28,600
Cost of product revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	344	345	589	612
Cost of service revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,810	1,842	3,160	3,309
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	4,935	4,820	8,716	8,639
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	5,357	5,288	9,349	9,423
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 3,290	$ 3,562	$ 6,018	$ 6,617

XML

SHARE-BASED COMPENSATION - Narrative (Details) - $ / shares		6 Months Ended	12 Months Ended
	Sep. 10, 2020	Sep. 30, 2020	Mar. 31, 2020
2019 Equity Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of new shares (in shares)	4,700,000
Number of shares reserved for issuance (in shares)	11,494,651
ESPP
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Percentage of common stock price for employees			85.00%
Shares purchased by employees under ESPP (in shares)		279,812
Share price (in USD per share)		$ 23.14

XML

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Cash and cash equivalents	$ 415,719	$ 338,489	$ 245,064	$ 409,632
Restricted cash	748	1,748	1,000	188
Total cash, cash equivalents and restricted cash	$ 416,467	$ 340,237	$ 246,064	$ 409,820

XML

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 12,088	$ 50,414
Unrealized Gains	39	168
Fair Value	12,127	50,582
Short-term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,088	47,852
Unrealized Gains	39	117
Fair Value	12,127	47,969
Short-term Marketable Securities | U.S. government and municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,585	28,621
Unrealized Gains	29	107
Fair Value	3,614	28,728
Short-term Marketable Securities | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,595	14,644
Unrealized Gains	0	0
Fair Value	6,595	14,644
Short-term Marketable Securities | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,908	4,587
Unrealized Gains	10	10
Fair Value	1,918	4,597
Long-term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	2,562
Unrealized Gains	0	51
Fair Value	$ 0	2,613
Long-term Marketable Securities | U.S. government and municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,562
Unrealized Gains		51
Fair Value		$ 2,613

XML

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES - Summary of Contractual Maturities of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Available-for-sale securities:
Due in 1 year or less	$ 12,127	$ 47,969
Due after 1 year through 5 years	0	2,613
Available-for-sale Securities	$ 12,127	$ 50,582

XML

FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
ASSETS:
Cash and cash equivalents	$ 415,719	$ 338,489
Available-for-sale securities	12,127	50,582
Derivative financial instruments	151
Total assets	427,997	389,071
LIABILITIES:
Contingent purchase consideration	(748)	(1,748)
Derivative financial instruments		(49)
Total liabilities	(748)	(1,797)
U.S. government and municipal obligations
ASSETS:
Available-for-sale securities	3,614	31,341
Commercial paper
ASSETS:
Available-for-sale securities	6,595	14,644
Corporate bonds
ASSETS:
Available-for-sale securities	1,918	4,597
Level 1
ASSETS:
Cash and cash equivalents	415,719	338,489
Derivative financial instruments	0
Total assets	420,213	374,427
LIABILITIES:
Contingent purchase consideration	0	0
Derivative financial instruments		0
Total liabilities	0	0
Level 1 | U.S. government and municipal obligations
ASSETS:
Available-for-sale securities	2,576	31,341
Level 1 | Commercial paper
ASSETS:
Available-for-sale securities	0	0
Level 1 | Corporate bonds
ASSETS:
Available-for-sale securities	1,918	4,597
Level 2
ASSETS:
Cash and cash equivalents	0	0
Derivative financial instruments	151
Total assets	7,784	14,644
LIABILITIES:
Contingent purchase consideration	0	0
Derivative financial instruments		(49)
Total liabilities	0	(49)
Level 2 | U.S. government and municipal obligations
ASSETS:
Available-for-sale securities	1,038	0
Level 2 | Commercial paper
ASSETS:
Available-for-sale securities	6,595	14,644
Level 2 | Corporate bonds
ASSETS:
Available-for-sale securities	0	0
Level 3
ASSETS:
Cash and cash equivalents	0	0
Derivative financial instruments	0
Total assets	0	0
LIABILITIES:
Contingent purchase consideration	(748)	(1,748)
Derivative financial instruments		0
Total liabilities	(748)	(1,748)
Level 3 | U.S. government and municipal obligations
ASSETS:
Available-for-sale securities	0	0
Level 3 | Commercial paper
ASSETS:
Available-for-sale securities	0	0
Level 3 | Corporate bonds
ASSETS:
Available-for-sale securities	$ 0	$ 0

XML

FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended
	Feb. 28, 2021	Apr. 30, 2020	Sep. 30, 2020	Mar. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of contingent liability			$ 748	$ 1,748
Gigavation
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of contingent liability			700	700
Gigavation | Forecast
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of contingent liability	$ 700
Payments of contingent consideration	$ 700
Gigavation | Other Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of contingent liability			$ 700	700
Eastwind
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of contingent liability				$ 1,000
Payments of contingent consideration		$ 1,000

XML

FAIR VALUE MEASUREMENTS - Reconciliation of Changes in Level 3 Liabilities (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at March 31, 2020	$ (1,748)
Payments made	1,000
Balance at September 30, 2020	$ (748)

XML

INVENTORIES (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 16,267	$ 15,311
Work in process	125	819
Finished goods	6,057	5,376
Deferred costs	3,774	721
Total inventories	$ 26,223	$ 22,227

XML

ACQUISITIONS & DIVESTITURES - Gigavation (Details) - USD ($) $ in Thousands	Feb. 05, 2020	Sep. 30, 2020	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 1,718,595	$ 1,725,680
Gigavation
Business Acquisition [Line Items]
Percentage of common stock acquired	100.00%
Estimated purchase price	$ 8,000
Goodwill	$ 3,800

XML

ACQUISITIONS & DIVESTITURES - Eastwind Acquisition (Details) - USD ($) $ in Thousands	Apr. 03, 2019	Sep. 30, 2020	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 1,718,595	$ 1,725,680
Eastwind
Business Acquisition [Line Items]
Estimated purchase price	$ 5,200
Goodwill	$ 1,000

XML

ACQUISITIONS & DIVESTITURES - HNT Tools Business Divestiture (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Sep. 14, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Transitional services, period (up to)	18 months
Income from divestiture		$ 0.1	$ 0.3	$ 0.1	$ 1.2
HNT Tools Business | Disposed of by Sale
Business Acquisition [Line Items]
Contingent consideration related to the divestiture, measurement period	2 years
Change in fair value contingent consideration in other expense					$ 0.5
HNT Tools Business | Disposed of by Sale | Maximum
Business Acquisition [Line Items]
Contingent consideration related to the divestiture	$ 4.0

XML

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)	3 Months Ended	6 Months Ended		9 Months Ended
	Dec. 31, 2019 reporting_unit	Sep. 30, 2020 USD ($)	Sep. 30, 2019 reporting_unit	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Number of reporting units | reporting_unit	1		2
Impairment of intangible assets				$ 0
Goodwill		$ 1,718,595,000			$ 1,725,680,000
Carrying value of intangible assets		$ 551,783,000			582,179,000
Weighted average useful life of acquired intangible assets		14 years 7 months 6 days
Developed and Core Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets		11 years 2 months 12 days
Customer and Distributor Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets		15 years 10 months 24 days
Trademarks and Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets		8 years 7 months 6 days
Capitalized Software
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets		3 years
Trade Name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets carrying value		$ 18,600,000			$ 18,600,000

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Roll Forward]
Balance at March 31, 2020	$ 1,725,680
Foreign currency translation impact	(7,085)
Balance at September 30, 2020	$ 1,718,595

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,106,996	$ 1,091,953
Accumulated Amortization	(573,813)	(528,374)
Net	533,183	563,579
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	251,824	249,675
Accumulated Amortization	(203,010)	(191,876)
Net	48,814	57,799
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	775,018	767,366
Accumulated Amortization	(305,680)	(275,361)
Net	469,338	492,005
Distributor relationships and technology licenses
Finite-Lived Intangible Assets [Line Items]
Cost	11,454	6,785
Accumulated Amortization	(7,233)	(6,321)
Net	4,221	464
Definite-lived trademark and trade name
Finite-Lived Intangible Assets [Line Items]
Cost	39,394	39,059
Accumulated Amortization	(28,960)	(26,246)
Net	10,434	12,813
Core technology
Finite-Lived Intangible Assets [Line Items]
Cost	7,192	7,192
Accumulated Amortization	(7,133)	(7,074)
Net	59	118
Net beneficial leases
Finite-Lived Intangible Assets [Line Items]
Cost	336	336
Accumulated Amortization	(336)	(336)
Net	0	0
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	292	292
Accumulated Amortization	(292)	(292)
Net	0	0
Leasehold interest
Finite-Lived Intangible Assets [Line Items]
Cost	500	500
Accumulated Amortization	(500)	(500)
Net	0	0
Backlog
Finite-Lived Intangible Assets [Line Items]
Cost	16,461	16,223
Accumulated Amortization	(16,461)	(16,223)
Net	0	0
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Cost	3,317	3,317
Accumulated Amortization	(3,255)	(3,202)
Net	62	115
Other
Finite-Lived Intangible Assets [Line Items]
Cost	1,208	1,208
Accumulated Amortization	(953)	(943)
Net	$ 255	$ 265

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 20,688	$ 22,814	$ 40,967	$ 45,764
Cost of product revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	5,320	6,677	10,333	13,479
Operating expense
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 15,368	$ 16,137	$ 30,634	$ 32,285

XML

GOODWILL AND INTANGIBLE ASSETS - Schedule of Expected Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021 (remaining six months)	$ 40,544
2022	71,466
2023	63,731
2024	55,485
2025	48,421
Thereafter	253,536
Net	$ 533,183	$ 563,579

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details)	6 Months Ended
	Sep. 30, 2020
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

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	Sep. 30, 2020	Mar. 31, 2020
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other Current Assets	$ 151	$ 0
Accrued Other
Derivatives, Fair Value [Line Items]
Accrued Other	0	49
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amounts	3,516	1,722
Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other Current Assets	105	0
Designated as Hedging Instrument | Accrued Other
Derivatives, Fair Value [Line Items]
Accrued Other	0	49
Designated as not hedging instrument
Derivatives, Fair Value [Line Items]
Notional Amounts	6,566	0
Designated as not hedging instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other Current Assets	46	0
Designated as not hedging instrument | Accrued Other
Derivatives, Fair Value [Line Items]
Accrued Other	$ 0	$ 0

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Summary of Effect of Foreign Exchange Forward Contracts on Other Comprehensive Income and Results of Operations (Details) - Forward contracts - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ 236	$ (27)	$ 247	$ (101)
Gain (Loss) Reclassified from Accumulated OCI into Income	(137)	24	(94)	70
Gain Recognized in Income	46	0	46	0
Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	236	(27)	247	(101)
Gain (Loss) Reclassified from Accumulated OCI into Income	(22)	(4)	(13)	(8)
Sales and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	(115)	28	(81)	78
General and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in Income	$ 46	$ 0	$ 46	$ 0

XML

LONG-TERM DEBT (Details)		3 Months Ended
	Jan. 16, 2018 USD ($) shares	Sep. 30, 2020 USD ($)	Oct. 24, 2017 shares
Debt Instrument [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares) | shares	25,000,000		20,000,000
Senior Secured Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Debt term	5 years
Credit facility	$ 1,000,000,000.0	$ 1,000,000,000.0
Amount outstanding under credit facility		$ 450,000,000
Commitment fee percentage		0.25%
Debt default, acceleration clause, required consent percentage	50.00%
Debt issuance cost, gross		$ 12,200,000
Unamortized debt issuance costs		4,000,000.0
Senior Secured Revolving Credit Facility | Line of Credit | Prepaid Expenses and Other Current Assets
Debt Instrument [Line Items]
Unamortized debt issuance costs		1,700,000
Senior Secured Revolving Credit Facility | Line of Credit | Other Assets
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 2,300,000
Senior Secured Revolving Credit Facility | Line of Credit | Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.30%
Senior Secured Revolving Credit Facility | Line of Credit | Maximum | Foreign Subsidiaries
Debt Instrument [Line Items]
Voting stock pledge limit for any foreign subsidiary	65.00%
Senior Secured Revolving Credit Facility | Line of Credit | Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.15%
Senior Secured Revolving Credit Facility | Line of Credit | Federal Funds Effective Rate
Debt Instrument [Line Items]
Interest rate in excess of effective rate	0.50%
Senior Secured Revolving Credit Facility | Line of Credit | LIBOR
Debt Instrument [Line Items]
Interest rate in excess of effective rate	1.00%
Senior Secured Revolving Credit Facility | Line of Credit | LIBOR | LIBOR Loans
Debt Instrument [Line Items]
Interest rate in excess of effective rate		1.50%
Senior Secured Revolving Credit Facility | Line of Credit | LIBOR | LIBOR Loans | Maximum
Debt Instrument [Line Items]
Interest rate in excess of effective rate		2.00%
Senior Secured Revolving Credit Facility | Line of Credit | LIBOR | LIBOR Loans | Minimum
Debt Instrument [Line Items]
Interest rate in excess of effective rate		1.00%
Senior Secured Revolving Credit Facility | Line of Credit | Base Rate | Base Rate Loans
Debt Instrument [Line Items]
Interest rate in excess of effective rate		0.50%
Senior Secured Revolving Credit Facility | Line of Credit | Base Rate | Base Rate Loans | Maximum
Debt Instrument [Line Items]
Interest rate in excess of effective rate		1.00%
Senior Secured Revolving Credit Facility | Line of Credit | Base Rate | Base Rate Loans | Minimum
Debt Instrument [Line Items]
Interest rate in excess of effective rate		0.00%
Letter of Credit Sub-facility | Line of Credit
Debt Instrument [Line Items]
Credit facility	$ 75,000,000.0
Senior Secured Revolving Credit Facility Leverage Ratio Terms One | Line of Credit | Maximum
Debt Instrument [Line Items]
Leverage ratio		3.50
Senior Secured Revolving Credit Facility Leverage Ratio Terms One | Line of Credit | Minimum
Debt Instrument [Line Items]
Leverage ratio		1.50
Senior Secured Revolving Credit Facility Leverage Ratio Terms Two | Line of Credit | Maximum
Debt Instrument [Line Items]
Leverage ratio		2.75
Senior Secured Revolving Credit Facility Leverage Ratio Terms Two | Line of Credit | Minimum
Debt Instrument [Line Items]
Leverage ratio		1.50

XML

RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($) Employee	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($) plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (31)	$ 150		$ 62	$ 273
Restructuring plans | plan						2
Restructuring costs addition				$ 100
VSP
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 17,300
Number of employees terminated | Employee			155
VSP | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges					100
Q2FY20 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 500
Q2FY20 Plan | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 200
Q4FY20 Plan | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 2,100

XML

RESTRUCTURING CHARGES - Schedule of Restructuring Liability (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Balance at March 31, 2020	$ 1,720
Restructuring charges to operations	62
Cash payments	(1,863)
Other adjustments	81
Balance at September 30, 2020	0
Q2FY20 Plan | Employee Related Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at March 31, 2020	3
Restructuring charges to operations	0
Cash payments	(3)
Other adjustments	0
Balance at September 30, 2020	0
Q4FY20 Plan | Employee Related Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at March 31, 2020	1,717
Restructuring charges to operations	62
Cash payments	(1,860)
Other adjustments	81
Balance at September 30, 2020	$ 0

XML

LEASES - Narrative (Details)	Sep. 30, 2020
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease terms	1 year
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease terms	11 years

XML

LEASES - Operating Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Lease cost under long-term operating leases	$ 3,263	$ 3,276	$ 6,525	$ 6,521
Lease cost under short-term operating leases	1,567	897	2,380	1,749
Variable lease cost under short-term and long-term operating leases	1,068	1,063	1,950	2,275
Total operating lease cost	$ 5,898	$ 5,236	$ 10,855	$ 10,545

XML

LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Leases [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,794	$ 2,049
Weighted average remaining lease term in years - operating leases	8 years 1 month 2 days		8 years 7 months 2 days
Weighted average discount rate - operating leases	4.10%		4.10%

XML

LEASES - Future Minimum Payments Under Non-Cancellable Leases (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Leases [Abstract]
2021 (remaining six months)	$ 6,141
2022	14,507
2023	12,339
2024	10,216
2025	10,057
Thereafter	38,364
Total lease payments	91,624
Less imputed interest	(13,626)
Present value of lease liabilities	$ 77,998

XML

COMMITMENTS AND CONTINGENCIES (Details)			1 Months Ended
	Jul. 14, 2020 USD ($)	Oct. 13, 2017 USD ($)	Sep. 30, 2018 USD ($)	Oct. 31, 2017 patent	Mar. 31, 2016 subsidiary patent	Feb. 28, 2021 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability							$ 748,000	$ 1,748,000
Number of subsidiary entities | subsidiary					2
Number of patents allegedly infringed | patent				3	5
Damages sought			$ 2,800,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Estimate of potential enhancement							0
Maximum
Commitments and Contingencies Disclosure [Line Items]
Estimate of potential enhancement							2,800,000
Pre-suit Damages
Commitments and Contingencies Disclosure [Line Items]
Damages sought	$ 3,500,000	$ 3,500,000
Post-suit Damages
Commitments and Contingencies Disclosure [Line Items]
Damages sought	$ 2,250,000	$ 2,250,000
Pro Forma
Commitments and Contingencies Disclosure [Line Items]
Value added tax receivable							6,300,000
Gigavation
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability							$ 700,000	$ 700,000
Gigavation | Forecast
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability						$ 700,000

XML

PENSION BENEFIT PLANS - Narrative (Details) $ in Millions	6 Months Ended
	Sep. 30, 2020 USD ($) Employee	Mar. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans	$ 0.2
Expected cash contribution requirements for defined benefit pension plans, less than		$ 1.0
United States
Defined Benefit Plan Disclosure [Line Items]
Number of employees participating in noncontributory defined benefit pension plans | Employee	0

XML

PENSION BENEFIT PLANS - Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Retirement Benefits [Abstract]
Service cost	$ 52	$ 45	$ 104	$ 86
Interest cost	93	106	186	202
Net periodic pension cost	$ 145	$ 151	$ 290	$ 288

XML

TREASURY STOCK (Details) - USD ($) $ in Thousands	6 Months Ended		35 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Jan. 16, 2018	Oct. 24, 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)				25,000,000	20,000,000
Shares repurchased during the period, value	$ 0	$ 100,000
Stock remaining to be purchased (in shares)	7,243,431		7,243,431
Restricted Stock Units
Equity, Class of Treasury Stock [Line Items]
Shares paid for tax withholding (in shares)	481,739	500,093
Cost related to tax withholding	$ 12,600	$ 11,400
Share Repurchase Program, October 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)	25,000,000	25,000,000	25,000,000		25,000,000
Shares repurchased during the period (in shares)	0	4,160,836	17,756,569
Shares repurchased during the period, value		$ 100,000	$ 468,700

XML

NET LOSS PER SHARE - Schedule of Calculations of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net loss	$ (3,686)	$ (17,472)	$ (21,106)	$ (46,815)
Denominator:
Denominator for basic net loss per share - weighted average common shares outstanding (in shares)	73,058	75,687	72,682	76,490
Dilutive common equivalent shares:
Weighted average restricted stock units (in shares)	0	0	0	0
Denominator for diluted net loss per share - weighted average shares outstanding (in shares)	73,058	75,687	72,682	76,490
Net loss per share:
Basic net loss per share (in dollars per share)	$ (0.05)	$ (0.23)	$ (0.29)	$ (0.61)
Diluted net loss per share (in dollars per share)	$ (0.05)	$ (0.23)	$ (0.29)	$ (0.61)

XML

NET LOSS PER SHARE - Antidilutive Securities Excluded from Computation (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	536	624	839	897

XML

INCOME TAXES (Details)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	1057.40%	60.10%	11.80%	17.70%

XML

SEGMENT AND GEOGRAPHIC INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)
Segment Reporting [Abstract]
Number of segments | Segment			1
Segment Reporting Information [Line Items]
Total revenue	$ 205,339	$ 216,421	$ 389,154	$ 402,445
United States
Segment Reporting Information [Line Items]
Total revenue	120,027	139,544	227,350	246,647
Europe
Segment Reporting Information [Line Items]
Total revenue	37,990	33,901	72,748	65,210
Asia
Segment Reporting Information [Line Items]
Total revenue	13,878	13,138	27,574	25,690
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 33,444	$ 29,838	$ 61,482	$ 64,898