NTCT / NetScout Systems, Inc. - تصريحات هيئة الأوراق المالية والبورصات، التقرير السنوي، بيان الوكيل

شركة NetScout Systems, Inc.
US ˙ NasdaqGS ˙ US64115T1043

الإحصائيات الأساسية
LEI 5493005HZXZ3SPNVCV76
CIK 1078075
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to NetScout Systems, Inc.
SEC Filings (Chronological Order)
توفر هذه الصفحة قائمة كاملة ومرتبة ترتيبًا زمنيًا لتصريحات هيئة الأوراق المالية والبورصات، باستثناء تصريحات الملكية التي نقدمها في مكان آخر.
August 7, 2025 EX-10.5

NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS

Exhibit 10.5 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS NetScout Systems, Inc. (the “Company”) has granted to the recipient (as specified in the written notice provided by the Company to such recipient regarding such grant (the “Notice”)) (the “Recipient”), and the Recipient has accepted from the Company (by electronic acceptance

August 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 7, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 7, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commissi

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 June 30, 2025 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.

August 7, 2025 EX-10.6

NETSCOUT SYSTEMS, INC. 2019 Equity Incentive Plan Performance-Based Restricted Stock Unit Award Agreement – Terms and Conditions

Exhibit 10.6 NETSCOUT SYSTEMS, INC. 2019 Equity Incentive Plan Performance-Based Restricted Stock Unit Award Agreement – Terms and Conditions NetScout Systems, Inc. (the “Company”) has granted to the recipient (as specified in the written notice provided by the Company to such recipient regarding such grant (the “Notice”)) (the “Recipient”), and the Recipient has accepted from the Company (by elec

August 7, 2025 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2026 Financial Results

NETSCOUT Reports First Quarter Fiscal Year 2026 Financial Results WESTFORD, Mass., August 7, 2025 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurity, and DDoS protection solutions, today announced financial results for its first quarter ended June 30, 2025. Remarks by Anil Singhal, NETSCOUT’s President & Chief

July 25, 2025 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 25, 2025 DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant  ☒  Filed by a Party other than the Registrant  ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

May 30, 2025 EX-1.01

Conflict Minerals Report of NetScout Systems, Inc. as required by Items 1.01 and 1.02 of this Form

EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2024 to December 31, 2024 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1

May 30, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of princi

May 15, 2025 EX-10.11

OFFER LETTER

OFFER LETTER This Offer Letter (“Agreement”) is dated as of May 7 , 2025, by and between NetScout Systems, Inc.

May 15, 2025 EX-10.9

TRANSITION AND SEPARATION AGREEMENT

Exhibit 10.9 TRANSITION AND SEPARATION AGREEMENT This Transition and Separation Agreement (the “Agreement”) is made by and between Michael Szabados (“Employee” or “you”) and NetScout Systems, Inc. (the “Company”) (collectively referred to as the “Parties” or individually referred to as a “Party”). RECITALS WHEREAS, Employee has been employed by the Company as its Chief Operating Officer on an at-w

May 15, 2025 EX-10.18

NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS

NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS NetScout Systems, Inc. (the “Company”) has granted to the recipient (as specified in the written notice provided by the Company to such recipient regarding such grant (the “Notice”)) (the “Recipient”), and the Recipient has accepted from the Company (by electronic acceptance or authentica

May 15, 2025 EX-10.8

TRANSITION AND SEPARATION AGREEMENT

Exhibit 10.8 TRANSITION AND SEPARATION AGREEMENT This Transition and Separation Agreement (the “Agreement”) is made by and between Jean Bua (“Employee” or “you”) and NetScout Systems, Inc. (the “Company”) (collectively referred to as the “Parties” or individually referred to as a “Party”). RECITALS WHEREAS, Employee has been employed by the Company as its Chief Financial Officer and Principal Acco

May 15, 2025 EX-21

SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc. California Aran Communications Limited Ireland Arbor Networks GmbH Germany Arbor Networks K.K. Japan Arbor Networks UK Ltd United Kingdom Arbor Networks, LLC Delaware Ellacoy

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 15, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2025 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

May 15, 2025 EX-19

NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED INSIDER TRADING AND TRADING WINDOW POLICY May 6, 2025

NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED INSIDER TRADING AND TRADING WINDOW POLICY May 6, 2025 Because our stock is publicly traded, you must comply with the provisions of federal and state securities laws and with our policies. During the course of your relationship with NetScout Systems, Inc. (“NetScout” or “Company”), you will learn information about us that is not publicly known. It is ille

May 15, 2025 EX-10.10

OFFER LETTER

OFFER LETTER This Offer Letter (“Agreement”) is dated as of May 7 , 2025, by and between NetScout Systems, Inc.

May 8, 2025 EX-99.1

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2025 Financial Results and Announces Executive Transitions

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2025 Financial Results and Announces Executive Transitions WESTFORD, Mass.

May 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 May 05, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 May 05, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commission

February 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 December 31, 2024 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.

January 30, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 January 30, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 January 30, 2025 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commis

January 30, 2025 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2025 Financial Results

NETSCOUT Reports Third Quarter Fiscal Year 2025 Financial Results WESTFORD, Mass., January 30, 2025 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurity, and DDoS protection solutions, today announced financial results for its third quarter ended December 31, 2024. Remarks by Anil Singhal, NETSCOUT’s President &

November 1, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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, 2024 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.

October 31, 2024 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

October 24, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 October 24, 2024 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commis

October 24, 2024 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2025 Financial Results

NETSCOUT Reports Second Quarter Fiscal Year 2025 Financial Results WESTFORD, Mass.

October 4, 2024 EX-10.1

Third Amendment and Restatement Agreement, dated as of October 4, 2024, to the Second Amended and Restated Credit Agreement, dated as of July 27, 2021, by and among NetScout Systems, Inc., as borrower; certain subsidiaries of NetScout Systems, Inc., as loan parties; the lenders and issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent attaching the Third Amended and Restated Credit Agreement, dated as of October 4, 2024, by and among NetScout Systems, Inc., as borrower; JPMorgan Chase Bank, N.A., as administrative agent and collateral agent; JPMorgan Chase Bank, N.A., Bank of America, N.A., RBC Capital Markets, PNC Capital Markets LLC and Mizuho Bank, Ltd., as joint lead arrangers and joint bookrunners; TD Bank, N.A. and Silicon Valley Bank, a division of First-Citizens Bank & Trust Company, as co-documentation agents; and the lenders and issuing banks party thereto.

Exhibit 10.1 Execution Version THIRD AMENDMENT AND RESTATEMENT AGREEMENT dated as of October 4, 2024 (this “Agreement”), to the Second Amended and Restated Credit Agreement dated as of July 27, 2021, as amended by that certain First Amendment Agreement dated as of February 22, 2023 (the “Existing Credit Agreement”), among NETSCOUT SYSTEMS, INC., a Delaware corporation (the “Borrower”), the LENDERS

October 4, 2024 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 4, 2024 NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of incorporation or organizati

September 17, 2024 EX-FILING FEES

Filing fee table.

Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) NetScout Systems, Inc.

September 17, 2024 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2024 NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of incorporation or organiz

September 17, 2024 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended.

Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JUNE 23, 2020 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 10, 2020 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JULY 8, 2022 APPROVED BY THE STOCKHOLDERS: AUGUST 24, 2022 AMENDED AND RESTATED B

September 17, 2024 S-8

As filed with the Securities and Exchange Commission on September 17, 2024

As filed with the Securities and Exchange Commission on September 17, 2024 Registration No.

August 15, 2024 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

August 5, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 June 30, 2024 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.

August 5, 2024 EX-10.1

NETSCOUT SYSTEMS, INC. 2019 Equity Incentive Plan Performance-Based Restricted Stock Unit Award Agreement

Exhibit 10.1 NETSCOUT SYSTEMS, INC. 2019 Equity Incentive Plan Performance-Based Restricted Stock Unit Award Agreement NetScout Systems, Inc. (the “Company”) hereby enters into this Performance-Based Restricted Stock Unit Award Agreement, including the Terms and Conditions, and any appendix, exhibit or addendum attached hereto (the “Agreement”), as of the date of grant specified below, with the re

July 25, 2024 DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant  ☒  Filed by a Party other than the Registrant  ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 25, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 July 25, 2024 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 July 25, 2024 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commissio

July 25, 2024 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 25, 2024 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2025 Financial Results

NETSCOUT Reports First Quarter Fiscal Year 2025 Financial Results WESTFORD, Mass., July 25, 2024 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurity, and DDoS protection, today announced financial results for its first quarter ended June 30, 2024. Remarks by Anil Singhal, NETSCOUT’s President & Chief Executive O

May 31, 2024 EX-1.01

Conflict Minerals Report of NetScout Systems, Inc. as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2023 to December 31, 2023 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1934 for

May 31, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of principal

May 16, 2024 EX-97

NetScout Systems, Inc. Executive Compensation Recovery Policy

Exhibit 97 NetScout Systems, Inc. Executive Compensation Recovery Policy This policy covers the Covered Officers of NetScout Systems, Inc. (the “Company”) and explains when the Company will be required to seek recovery of Incentive Compensation awarded or paid to Covered Officers. Please refer to Exhibit A attached hereto (the “Definitions Exhibit”) for the definitions of capitalized terms used th

May 16, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2024 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

May 16, 2024 EX-21

SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc. California Aran Communications Limited Ireland Arbor Networks Canada Limited Canada Arbor Networks GmbH Germany Arbor Networks K.K. Japan Arbor Networks Pte Ltd Singapore Arb

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 16, 2024 EX-19

NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED INSIDER TRADING AND TRADING WINDOW POLICY May 3, 2023

Exhibit 19 NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED INSIDER TRADING AND TRADING WINDOW POLICY May 3, 2023 Because our stock is publicly traded, you must comply with the provisions of federal and state securities laws and with our policies. During the course of your relationship with NetScout Systems, Inc. (“NetScout” or “Company”), you will learn information about us that is not publicly known.

May 9, 2024 EX-99.1

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2024 Financial Results

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2024 Financial Results WESTFORD, Mass.

May 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 May 9, 2024 Date of Report (date of earliest event reported) NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-26251 (Commission

February 13, 2024 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC Passive Investment

SC 13G/A 1 formsc13ga-02132024090246.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 11)* NETSCOUT SYSTEMS INC (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to design

February 13, 2024 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01532-netscoutsystemsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: NetScout Systems Inc Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to des

February 9, 2024 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

February 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 December 31, 2023 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.

January 30, 2024 SC 13G/A

NTCT / NetScout Systems, Inc. / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G/A 1 nets23a2.htm CUSIP NO. 64115T104 13G Page 1 of 7 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* NETSCOUT SYSTEMS, INC. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of

January 25, 2024 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2024 Financial Results

Exhibit 99.1 NETSCOUT Reports Third Quarter Fiscal Year 2024 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-January 25, 2024-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of performance management, cybersecurity, and DDoS attack protection solutions, today announced financial results for its third quarter ended December 31, 2023. Remarks by Anil Singhal, NETSCOUT’s President and Chi

January 25, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 25, 2024 NETSCOUT SYSTEMS, INC.

November 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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, 2023 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.

November 2, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2023 NETSCOUT SYSTEMS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2023 NETSCOUT SYSTEMS, INC.

November 2, 2023 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2024 Financial Results

Exhibit 99.1 NETSCOUT Reports Second Quarter Fiscal Year 2024 Financial Results Delivers Q2 Financial Performance In-Line with Preliminary Results Released October 16th WESTFORD, Mass.-(BUSINESS WIRE)-November 2, 2023-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurity, and DDoS protection solutions, today announc

October 16, 2023 EX-99.1

NETSCOUT Reports Preliminary Financial Results for Second Fiscal Quarter and Updates Outlook for Full Fiscal Year 2024 Company to Release Final Fiscal Q2 Financial Results and Conduct Conference Call on November 2nd

Exhibit 99.1 NETSCOUT Reports Preliminary Financial Results for Second Fiscal Quarter and Updates Outlook for Full Fiscal Year 2024 Company to Release Final Fiscal Q2 Financial Results and Conduct Conference Call on November 2nd WESTFORD, Mass., October 16, 2023 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurit

October 16, 2023 8-K

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 16, 2023 NETSCOUT SYSTEMS, INC.

September 15, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 14, 2023 NETSCOUT SYSTEMS, INC.

September 15, 2023 EX-FILING FEES

Filing fee table.

Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) NetScout Systems, Inc.

September 15, 2023 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended.

Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JUNE 23, 2020 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 10, 2020 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JULY 8, 2022 APPROVED BY THE STOCKHOLDERS: AUGUST 24, 2022 AMENDED AND RESTATED B

September 15, 2023 S-8

As filed with the Securities and Exchange Commission on September 15, 2023

As filed with the Securities and Exchange Commission on September 15, 2023 Registration No.

August 3, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 June 30, 2023 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.

July 27, 2023 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 27, 2023 DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 27, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 27, 2023 NETSCOUT SYSTEMS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 27, 2023 NETSCOUT SYSTEMS, INC.

July 27, 2023 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2024 Financial Results

Exhibit 99.1 NETSCOUT Reports First Quarter Fiscal Year 2024 Financial Results Delivered Solid Q1 Financial Performance Released Next-Generation Technologies to Support 2H FY2024 Revenue Ramp WESTFORD, Mass.-(BUSINESS WIRE)-July 27, 2023-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of enterprise performance management, carrier service assurance, cybersecurity, and DDoS protection, tod

July 21, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 19, 2023 NETSCOUT SYSTEMS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 19, 2023 NETSCOUT SYSTEMS, INC.

May 31, 2023 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2022 to December 31, 2022

EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2022 to December 31, 2022 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1

May 31, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of princ

May 16, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2023 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

May 16, 2023 EX-21.2

SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc. California Aran Communications Limited Ireland Arbor Networks Canada Limited Canada Arbor Networks GmbH Germany Arbor Networks K.K. Japan Arbor Networks Pte Ltd Singapore Arb

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 4, 2023 EX-99.1

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2023 Financial Results

Exhibit 99.1 NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2023 Financial Results Delivers Strong Fourth Quarter and Full Fiscal Year Performance WESTFORD, Mass.-(BUSINESS WIRE)-May 4, 2023-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of performance management, cybersecurity, and DDoS protection solutions, today announced financial results for its fourth quarter and full fiscal

May 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 4, 2023 NETSCOUT SYSTEMS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 4, 2023 NETSCOUT SYSTEMS, INC.

February 24, 2023 EX-10.1

First Amendment Agreement, dated as of February 22, 2023, to the Second Amended and Restated Credit Agreement, dated as of July 27, 2021, by and among NetScout Systems, Inc., as borrower; certain subsidiaries of NetScout Systems, Inc., as loan parties; the lenders and issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent, attaching Second Amended and Restated Credit Agreement, dated as of July 27, 2021 (as amended by the First Amendment Agreement), by and among NetScout Systems, Inc., as borrower; JPMorgan Chase Bank, N.A., as administrative agent and collateral agent; JPMorgan Chase Bank, N.A., Wells Fargo Securities, LLC, BofA Securities Inc., RBC Capital Markets, PNC Capital Markets LLC and Mizuho Bank, Ltd., as joint lead arrangers and joint bookrunners; Santander Bank, N.A., U.S. Bank National Association, Fifth Third Bank, National Association, Silicon Valley Bank and TD Bank, N.A. as co-documentation agents; and the lenders and issuing banks party thereto.

EX-10.1 Exhibit 10.1 FIRST AMENDMENT AGREEMENT dated as of February 22, 2023 (this “Agreement”), to the Second Amended and Restated Credit Agreement dated as of July 27, 2021 (the “Existing Credit Agreement”), among NETSCOUT SYSTEMS, INC., a Delaware corporation (the “Borrower”), the LENDERS party thereto and JPMORGAN CHASE BANK, N.A., as Administrative Agent (in such capacity, the “Administrative

February 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2023 NETSCOUT SYSTEM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2023 NETSCOUT SYSTEMS, INC. (Exact name of Registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 000-26251 04-2837575 (Commissio

February 10, 2023 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC - NONE Passive Investment

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

February 10, 2023 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

February 9, 2023 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01502-netscoutsystemsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: NetScout Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to de

February 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 December 31, 2022 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.

January 31, 2023 SC 13G/A

NTCT / NetScout Systems, Inc. / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G/A 1 nets22a1.htm CUSIP NO. 64115T104 13G Page 1 of 7 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* NETSCOUT SYSTEMS, INC. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of

January 26, 2023 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2023 Financial Results

Exhibit 99.1 NETSCOUT Reports Third Quarter Fiscal Year 2023 Financial Results Delivers Solid Financial Performance and Updates FY23 Financial Outlook WESTFORD, Mass.-(BUSINESS WIRE)-January 26, 2023-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial results for its third quarter ended December

January 26, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 26, 2023 NETSCOUT SYSTEMS, INC.

January 25, 2023 EX-99.1

NETSCOUT Appoints Shannon Nash and Marlene Pelage to Board of Directors Adds Additional Financial Expertise, Strategy Experience, and Global Perspective

Exhibit 99.1 NETSCOUT Appoints Shannon Nash and Marlene Pelage to Board of Directors Adds Additional Financial Expertise, Strategy Experience, and Global Perspective WESTFORD, Mass., January 25, 2023 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced that experienced executives Shannon Nash and Marlene

January 25, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 24, 2023 NETSCOUT SYSTEMS, INC.

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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, 2022 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.

October 27, 2022 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2023 Financial Results

Exhibit 99.1 NETSCOUT Reports Second Quarter Fiscal Year 2023 Financial Results Delivers Strong Financial Performance and Advances Strategic Growth Priorities WESTFORD, Mass.-(BUSINESS WIRE)-October 27, 2022-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial results for its second quarter ended

October 27, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 27, 2022 NETSCOUT SYSTEMS, INC.

August 25, 2022 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended.

Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JUNE 23, 2020 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 10, 2020 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JULY 8, 2022 APPROVED BY THE STOCKHOLDERS: AUGUST 25, 2022 1. GENERAL. (a) Succes

August 25, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 24, 2022 NETSCOUT SYSTEMS, INC.

August 25, 2022 S-8

As filed with the Securities and Exchange Commission on August 25, 2022

As filed with the Securities and Exchange Commission on August 25, 2022 Registration No.

August 25, 2022 EX-FILING FEES

Filing fee table.

EX-FILING FEES 6 d400120dexfilingfees.htm EX-FILING FEES Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) NetScout Systems, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amo

August 25, 2022 EX-99.2

NetScout Systems, Inc. Amended and Restated 2011 Employee Stock Purchase Plan, as amended.

Exhibit 99.2 NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED 2011 EMPLOYEE STOCK PURCHASE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JUNE 29, 2011 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 7, 2011 AMENDED AND RESTATED BY THE COMPENSATION COMMITTEE: FEBRUARY 8, 2012 AMENDED AND RESTATED BY THE COMPENSATION COMMITTEE: JULY 3, 2018 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2018 AMENDED AND RESTATED BY THE B

August 4, 2022 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2023 Financial Results

Exhibit 99.1 NETSCOUT Reports First Quarter Fiscal Year 2023 Financial Results Delivers Strong Q1 Performance to Further Extend Business Momentum WESTFORD, Mass.-(BUSINESS WIRE)-August 4, 2022-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial results for its first quarter ended June 30, 2022. ?

August 4, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 4, 2022 NETSCOUT SYSTEMS, INC.

August 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 June 30, 2022 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.

July 13, 2022 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ? 240.

July 13, 2022 DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEF 14A 1 d326519ddef14a.htm DEF 14A Table of Contents SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement

May 27, 2022 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2021 to December 31, 2021

EX-1.01 2 d275000dex101.htm EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2021 to December 31, 2021 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the

May 27, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of principa

May 19, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2022 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

May 19, 2022 EX-21

SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc. California Aran Communications Limited Ireland Arbor Networks Canada Limited Canada Arbor Networks GmbH Germany Arbor Networks K.K. Japan Arbor Networks Pte Ltd Singapore Arb

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 10, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 9, 2022 NETSCOUT SYSTEMS, INC.

May 10, 2022 EX-10.2

Confirmation – Issuer Forward Repurchase Transaction, dated May 9, 2022, between NetScout Systems, Inc. and Wells Fargo Bank, National Association.

Exhibit 10.2 May 9, 2022 To: NetScout Systems, Inc. 310 Littleton Road Westford, MA 01886 Attention: Paul M. Canavan, CFA Sr. Director, Corporate Finance Telephone: (978) 614-4192 Email: [email protected] From:??Wells Fargo Bank, National Association (?Dealer?) ?????30 Hudson Yards ?????New York, NY 10001-2170 ?????Email: [email protected] Re: Issuer Forward R

May 10, 2022 EX-10.1

Confirmation – Issuer Forward Repurchase Transaction, dated May 9, 2022, between NetScout Systems, Inc. and Mizuho Markets Americas LLC.

Exhibit 10.1 May 9, 2022 To: NetScout Systems, Inc. 310 Littleton Road Westford, MA 01886 Attention: Paul M. Canavan, CFA Sr. Director, Corporate Finance Telephone: (978) 614-4192 Email: [email protected] From: Mizuho Markets Americas LLC c/o Mizuho Securities USA LLC, as agent 1271 Avenue of the Americas New York, NY 10020 Re: Issuer Forward Repurchase Transaction Ladies and Gentlemen: Th

May 5, 2022 EX-99.1

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2022 Financial Results

EX-99.1 2 a52708225ex991.htm EXHIBIT 99.1 Exhibit 99.1 NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2022 Financial Results Delivers Solid Fiscal Year 2022 Performance on Multiple Objectives WESTFORD, Mass.-(BUSINESS WIRE)-May 5, 2022-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial res

May 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 5, 2022 NETSCOUT SYSTEMS, INC.

February 14, 2022 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC - NONE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 10, 2022 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: NetScout Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed

February 8, 2022 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

February 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 December 31, 2021 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.

February 2, 2022 SC 13G

NTCT / NetScout Systems, Inc. / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G 1 nets21in1.htm CUSIP NO. 64115T104 13G Page 1 of 7 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* NETSCOUT SYSTEMS, INC. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of t

January 27, 2022 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2022 Financial Results

Exhibit 99.1 NETSCOUT Reports Third Quarter Fiscal Year 2022 Financial Results Delivers Strong Financial Performance and Updates FY?22 Outlook WESTFORD, Mass.-(BUSINESS WIRE)-January 27, 2022-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial results for its third quarter fiscal year 2022 ended

January 27, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 27, 2022 NETSCOUT SYSTEMS, INC.

December 10, 2021 SC 13G/A

NTCT / NetScout Systems, Inc. / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 27)* Netscout Systems, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 64115T104 (CUSIP Number) Eddie C. Brown Brown Capit

December 9, 2021 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0003-netscoutsystemsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: NetScout Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: November 30, 2021 Check the appropriate box to desi

November 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 4, 2021 NETSCOUT SYSTEMS, INC.

November 4, 2021 EX-10.2

NetScout Systems, Inc. Summary of Non-Employee Director Compensation

Exhibit 10.2 NetScout Systems, Inc. Summary of Non-Employee Director Compensation Non-employee directors are compensated $60,000 annually for their services and do not receive any additional compensation for any regular Board meeting attended. The lead non-employee director receives an additional annual retainer of $35,000. Non-employee directors will receive $15,000 annually for serving on the Au

November 4, 2021 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2022 Financial Results

Exhibit 99.1 NETSCOUT Reports Second Quarter Fiscal Year 2022 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-November 4, 2021-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of cybersecurity, service assurance, and business analytics solutions, today announced financial results for its second quarter fiscal year 2022 ended September 30, 2021. ?We are pleased with our second quarter re

November 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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, 2021 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.

September 13, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 9, 2021 NETSCOUT SYSTEMS, INC.

August 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents 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 June 30, 2021 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.

July 29, 2021 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2022 Financial Results

Exhibit 99.1 NETSCOUT Reports First Quarter Fiscal Year 2022 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-July 29, 2021-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its first quarter fiscal year 2022 ended June 30, 2021. ?Our first-quarter performance provides a solid start to fiscal yea

July 29, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2021 NETSCOUT SYSTEMS, INC. (Exact name of Registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 000-26251 04-2837575 (Commission Fi

July 29, 2021 EX-10.5

Second Amendment and Restatement Agreement, dated as of July 27, 2021, to the Amended and Restated Credit Agreement, dated as of January 16, 2018, by and among NetScout Systems, Inc., as borrower; certain subsidiaries of NetScout Systems, Inc., as loan parties; the lenders and issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent attaching the Second Amended and Restated Credit Agreement, dated as of July 27, 2021, by and among NetScout Systems, Inc., as borrower; JPMorgan Chase Bank, N.A., as administrative agent and collateral agent; JPMorgan Chase Bank, N.A., Wells Fargo Securities, LLC, BofA Securities Inc., RBC Capital Markets, PNC Capital Markets LLC and Mizuho Bank, Ltd., as joint lead arrangers and joint bookrunners; Santander Bank, N.A., U.S. Bank National Association, Fifth Third Bank, National Association, Silicon Valley Bank and TD Bank, N.A. as co-documentation agents; and the lenders and issuing banks party thereto.

Exhibit 10.5 EXECUTION VERSION SECOND AMENDMENT AND RESTATEMENT AGREEMENT dated as of July 27, 2021 (this ?Agreement?), to the Amended and Restated Credit Agreement dated as of January 16, 2018 (the ?Existing Credit Agreement?), among NETSCOUT SYSTEMS, INC., a Delaware corporation (the ?Borrower?), the LENDERS party thereto and JPMORGAN CHASE BANK, N.A., as Administrative Agent (in such capacity,

July 29, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 29, 2021 NETSCOUT SYSTEMS, INC.

July 21, 2021 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

July 21, 2021 DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEF 14A 1 d194945ddef14a.htm DEF 14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Addit

May 28, 2021 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2020 to December 31, 2020

Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2020 to December 31, 2020 Introduction This Conflict Minerals Report (?Report?) of NetScout Systems, Inc. (?NETSCOUT? or the ?Company?) has been prepared pursuant to Rule 13p-1 (the ?Rule?) promulgated by the Securities and Exchange Commission (?SEC?) under the Securities Exchange Act of 1934 for

May 28, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of principa

May 20, 2021 EX-21

SUBSIDIARIES OF NETSCOUT

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 20, 2021 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2021 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

May 6, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 6, 2021 NETSCOUT SYSTEMS, INC.

May 6, 2021 EX-99.1

NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2021 Financial Results

Exhibit 99.1 NETSCOUT Reports Fourth Quarter and Full Fiscal Year 2021 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-May 6, 2021-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its fourth quarter and full fiscal year ended March 31, 2021. ?We delivered stronger-than-anticipated fourth-quarte

February 12, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 26)* Net

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 26)* Netscout Systems, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 64115T104 (CUSIP Number) Eddie C. Brown Brown Capit

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

February 11, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8)* Netscout SYS Inc (Name of Issuer) (Title of Class of Securities) (CUSIP Number) December 31, 2020 (Date

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: NetScout Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 8, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

February 4, 2021 10-Q

Quarterly Report - 10-Q

Table of Contents 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 December 31, 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.

January 28, 2021 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2021 Financial Results

Exhibit 99.1 NETSCOUT Reports Third Quarter Fiscal Year 2021 Financial Results Company Raises EPS Outlook for FY’21 WESTFORD, Mass.-(BUSINESS WIRE)-January 28, 2021-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its third-quarter fiscal year 2021 ended December 31, 2020. “We are pleased with ou

January 28, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 28, 2021 NETSCOUT SYSTEMS, INC.

November 3, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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.

October 29, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - NETSCOUT SYSTEMS, INC. 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 29, 2020 NETSCOUT SYSTEMS, INC.

October 29, 2020 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2021 Financial Results

Exhibit 99.1 NETSCOUT Reports Second Quarter Fiscal Year 2021 Financial Results Company Delivers Solid EPS Growth WESTFORD, Mass.-(BUSINESS WIRE)-October 29, 2020-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its second quarter fiscal year 2021 ended September 30, 2020. “We delivered solid ear

September 14, 2020 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended and restated.

EX-99.1 Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 AMENDED AND RESTATED BY THE BOARD OF DIRECTORS: JUNE 23, 2020 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 10, 2020 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of

September 14, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 10, 2020 NETSCOUT SYSTEMS, INC.

September 14, 2020 S-8

- S-8

S-8 As filed with the Securities and Exchange Commission on September 14, 2020 Registration No.

August 6, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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 June 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.

July 30, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 30, 2020 NETSCOUT SYSTEMS, INC.

July 30, 2020 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2021 Financial Results

Exhibit 99.1 NETSCOUT Reports First Quarter Fiscal Year 2021 Financial Results Company delivers strong EPS growth to start fiscal year 2021 WESTFORD, Mass.-(BUSINESS WIRE)-July 30, 2020-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its first quarter fiscal year 2021 ended June 30, 2020. “We de

July 22, 2020 DEF 14A

Schedule 14A

DEF 14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 22, 2020 DEFA14A

- DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

May 29, 2020 SD

- SD

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of princ

May 29, 2020 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2019 to December 31, 2019

EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2019 to December 31, 2019 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1

May 20, 2020 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 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

May 20, 2020 EX-4.4

Exhibit 4.4

Exhibit 4.4 DESCRIPTION OF COMMON STOCK The following description summarizes the most important terms of our capital stock. Because it is only a summary, it does not contain all the information that may be important to you. For a complete description of the matters set forth in this “Description of Capital Stock,” you should refer to our amended and restated certificate of incorporation and amende

May 20, 2020 EX-21

SUBSIDIARIES OF NETSCOUT

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 11, 2020 EX-3.1

Amended and Restated By-laws of NetScout (filed as Exhibit 3.1 to Registrant’s current Report on Form 8-K (File No. 000-26251), filed with the Commission on May 11, 2020 and incorporated herein by reference).

EX-3.1 Exhibit 3.1 AMENDED AND RESTATED BY-LAWS OF NETSCOUT SYSTEMS, INC. (As amended and restated on May 5, 2020) TABLE OF CONTENTS Page ARTICLE 1 – STOCKHOLDERS 1 1.1 Place of Meetings 1 1.2 Annual Meeting 1 1.3 Special Meetings 1 1.4 Notice of Meetings 1 1.5 Voting List 1 1.6 Quorum 1 1.7 Adjournments 2 1.8 Voting and Proxies 2 1.9 Action at Meeting 2 1.10 Introduction of Business at Meetings 2

May 11, 2020 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 5, 2020 NETSCOUT SYSTEMS, INC.

May 7, 2020 EX-99.1

NETSCOUT Reports Financial Results For Fourth Quarter and Full Fiscal Year 2020

Exhibit 99.1 NETSCOUT Reports Financial Results For Fourth Quarter and Full Fiscal Year 2020 WESTFORD, Mass.-(BUSINESS WIRE)-May 7, 2020-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its fourth quarter and full fiscal year 2020 ended March 31, 2020. “For fiscal year 2020, we delivered solid ea

May 7, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 7, 2020 NETSCOUT SYSTEMS, INC.

April 16, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 16, 2020 NETSCOUT SYSTEMS, INC.

April 16, 2020 EX-99.1

NETSCOUT Provides a Business and Fiscal Year 2020 Financial Update

Exhibit 99.1 NETSCOUT Provides a Business and Fiscal Year 2020 Financial Update Fourth Quarter and Fiscal Year End 2020 Earnings Call Scheduled for May 7th WESTFORD, Mass.-(BUSINESS WIRE)-April 16, 2020-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced a business update, preliminary financial results for its fiscal yea

February 18, 2020 SC 13G/A

NTCT / NetScout Systems, Inc. / ALLIANCEBERNSTEIN L.P. - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

February 14, 2020 SC 13G/A

NTCT / NetScout Systems, Inc. / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 25)* Netscout Systems, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 64115T104 (CUSIP Number) Eddie C. Brown Brown Capit

February 13, 2020 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC - NONE Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

February 12, 2020 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* NETSCOUT SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

February 12, 2020 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: NetScout Systems Inc Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 6, 2020 EX-10.1

NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN FORM OF RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS

Exhibit 10.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN FORM OF RESTRICTED STOCK UNIT AWARD AGREEMENT – TERMS AND CONDITIONS NetScout Systems, Inc. (the “Company”) has granted to the recipient (as specified in the written notice provided by the Company to such recipient regarding such grant (the “Notice”)) (the “Recipient”), and the Recipient has accepted from the Company (by electronic acc

February 6, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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 December 31, 2019 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.

January 30, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 30, 2020 NETSCOUT SYSTEMS, INC.

January 30, 2020 EX-99.1

NETSCOUT Reports Third Quarter Fiscal Year 2020 Financial Results

Exhibit 99.1 NETSCOUT Reports Third Quarter Fiscal Year 2020 Financial Results Company Exceeds its Third Quarter Revenue and EPS Expectations WESTFORD, Mass.-(BUSINESS WIRE)-January 30, 2020-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its third quarter fiscal year 2020 ended December 31, 201

October 31, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 31, 2019 NETSCOUT SYSTEMS, INC.

October 31, 2019 EX-99.1

NETSCOUT Reports Second Quarter Fiscal Year 2020 Financial Results

Exhibit 99.1 NETSCOUT Reports Second Quarter Fiscal Year 2020 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-October 31, 2019-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its second quarter fiscal year 2020 ended September 30, 2019. “We delivered solid second-quarter results with both non-

October 31, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents 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, 2019 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.

October 25, 2019 S-8 POS

NTCT / NetScout Systems, Inc. S-8 POS - - S-8 POS

S-8 POS Registration No. 333-148364 Registration No. 333-178411 Registration No. 333-207695 As filed with the Securities and Exchange Commission on October 25, 2019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Post-Effective Amendment No. 1 to Registration Statement on Form S-8 (Registration No. 333-148364) Post-Effective Amendment No. 1 to Registration Statement on Form

October 25, 2019 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan.

EX-99.1 Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of the NetScout Systems, Inc. 2007 Equity Incentive Plan (the “Prior Plan”). Following the Effective Date, no add

October 25, 2019 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan.

EX-99.1 Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of the NetScout Systems, Inc. 2007 Equity Incentive Plan (the “Prior Plan”). Following the Effective Date, no add

October 25, 2019 S-8 POS

NTCT / NetScout Systems, Inc. S-8 POS - - S-8 POS

S-8 POS Registration No. 333-148364 Registration No. 333-178411 Registration No. 333-207695 As filed with the Securities and Exchange Commission on October 25, 2019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Post-Effective Amendment No. 1 to Registration Statement on Form S-8 (Registration No. 333-148364) Post-Effective Amendment No. 1 to Registration Statement on Form

October 25, 2019 S-8 POS

NTCT / NetScout Systems, Inc. S-8 POS - - S-8 POS

S-8 POS Registration No. 333-148364 Registration No. 333-178411 Registration No. 333-207695 As filed with the Securities and Exchange Commission on October 25, 2019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Post-Effective Amendment No. 1 to Registration Statement on Form S-8 (Registration No. 333-148364) Post-Effective Amendment No. 1 to Registration Statement on Form

October 25, 2019 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan.

EX-99.1 Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of the NetScout Systems, Inc. 2007 Equity Incentive Plan (the “Prior Plan”). Following the Effective Date, no add

October 25, 2019 EX-99.1

NetScout Systems, Inc. 2019 Equity Incentive Plan.

EX-99.1 Exhibit 99.1 NETSCOUT SYSTEMS, INC. 2019 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JULY 9, 2019 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 12, 2019 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of the NetScout Systems, Inc. 2007 Equity Incentive Plan (the “Prior Plan”). Following the Effective Date, no add

October 25, 2019 S-8

Form S-8

S-8 As filed with the Securities and Exchange Commission on October 25, 2019 Registration No.

September 16, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 12, 2019 NETSCOUT SYSTEMS, INC.

August 8, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents 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 June 30, 2019 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.

August 1, 2019 EX-99.1

NETSCOUT Reports First Quarter Fiscal Year 2020 Financial Results

Exhibit 99.1 NETSCOUT Reports First Quarter Fiscal Year 2020 Financial Results WESTFORD, Mass.-(BUSINESS WIRE)-August 1, 2019-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its first quarter fiscal year 2020 ended June 30, 2019. “We delivered first-quarter earnings per share performance in-line

August 1, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8‑K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 1, 2019 NETSCOUT SYSTEMS, INC.

July 24, 2019 DEFA14A

NTCT / NetScout Systems, Inc. DEFA14A - - DEFA14A

DEFA14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Under Rule 14a-12 NETSCOUT SYSTEMS, INC.

July 24, 2019 DEF 14A

definitive proxy statement on Schedule 14A

DEF 14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

May 31, 2019 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2018 to December 31, 2018

EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2018 to December 31, 2018 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1

May 31, 2019 SD

NTCT / NetScout Systems, Inc. SD - - SD

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of princ

May 28, 2019 EX-21

SUBSIDIARIES OF NETSCOUT

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 28, 2019 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2019 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

May 28, 2019 EX-4.4

DESCRIPTION OF COMMON STOCK

Exhibit 4.4 DESCRIPTION OF COMMON STOCK The following description summarizes the most important terms of our capital stock. Because it is only a summary, it does not contain all the information that may be important to you. For a complete description of the matters set forth in this “Description of Capital Stock,” you should refer to our amended and restated certificate of incorporation and amende

May 2, 2019 EX-99.1

NETSCOUT Reports Financial Results for Fourth Quarter and Full Fiscal Year 2019

Exhibit 99.1 NETSCOUT Reports Financial Results for Fourth Quarter and Full Fiscal Year 2019 WESTFORD, Mass.-(BUSINESS WIRE)-May 2, 2019-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its fourth quarter and full fiscal year 2019 ended March 31, 2019. “Our fourth-quarter fiscal year 2019 perform

May 2, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2019 NETSCOUT SYSTEMS, INC.

April 9, 2019 EX-99.1

NETSCOUT SYSTEMS Reports Preliminary Financial Results for Fourth Quarter and Full Fiscal Year 2019

EX-99.1 Exhibit 99.1 Contacts: Investors Media Andrew Kramer Maribel Lopez Vice President of Investor Relations Manager, Marketing & Corporate Communications 978-614-4279 781-362-4330 [email protected] [email protected] NETSCOUT SYSTEMS Reports Preliminary Financial Results for Fourth Quarter and Full Fiscal Year 2019 WESTFORD, Mass., April 9, 2019 – NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a

April 9, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 9, 2019 NETSCOUT SYSTEMS, INC.

February 19, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 12, 2019 NETSCOUT SYSTEMS, INC.

February 14, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / Turtle Creek Equity Fund Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* NETSCOUT SYSTEMS, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) January 10, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

February 14, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / TURTLE CREEK ASSET MANAGEMENT INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* NETSCOUT SYSTEMS, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

February 14, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 24)* Netscout Systems, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 64115T104 (CUSIP Number) Eddie C. Brown Brown Capit

February 13, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC - NONE Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 06)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

February 13, 2019 SC 13G

NTCT / NetScout Systems, Inc. / ALLIANCEBERNSTEIN L.P. - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* NetScout Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

February 11, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC Passive Investment

netscoutsystemsinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6 )* Name of issuer: NetScout Systems Inc Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriate

February 8, 2019 SC 13G/A

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* NETSCOUT SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

February 7, 2019 10-Q

NTCT / NetScout Systems, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2018 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.

January 30, 2019 EX-99.1

NETSCOUT SYSTEMS Reports Financial Results for Third Quarter Fiscal Year 2019

Exhibit 99.1 NETSCOUT SYSTEMS Reports Financial Results for Third Quarter Fiscal Year 2019 WESTFORD, Mass.-(BUSINESS WIRE)-January 30, 2019-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its third quarter of fiscal year 2019 ended December 31, 2018. “The combination of relatively strong revenue

January 30, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 30, 2019 NETSCOUT SYSTEMS, INC.

November 8, 2018 S-8

NTCT / NetScout Systems, Inc. FORM S-8

Form S-8 As filed with the Securities and Exchange Commission on November 8, 2018 Registration No.

November 8, 2018 10-Q

NTCT / NetScout Systems, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 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.

November 8, 2018 EX-10.1

NetScout Systems, Inc. Summary of Non-Employee Director Compensation

Exhibit 10.1 NetScout Systems, Inc. Summary of Non-Employee Director Compensation Non-employee directors are compensated $60,000 annually for their services and do not receive any additional compensation for any regular Board meeting attended. The lead non-employee director receives an additional annual retainer of $35,000. Non-employee directors will receive $15,000 annually for serving on the Au

November 1, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 1, 2018 NETSCOUT SYSTEMS, INC.

November 1, 2018 EX-99.1

NETSCOUT Reports Financial Results for Second Quarter Fiscal Year 2019

Exhibit 99.1 NETSCOUT Reports Financial Results for Second Quarter Fiscal Year 2019 WESTFORD, Mass.-(BUSINESS WIRE)-November 1, 2018-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its second quarter of fiscal year 2019 ended September 30, 2018. “We made important strategic, operational and fina

September 13, 2018 EX-10.1

Amended and Restated 2011 Employee Stock Purchase Plan (filed as Exhibit 10.1 to the Registrant’s current report on Form 8-K, (File No. 000-26251) filed with the Commission on September 13, 2018 and incorporated herein by reference).

EX-10.1 2 d605537dex101.htm EX-10.1 Exhibit 10.1 NETSCOUT SYSTEMS, INC. AMENDED AND RESTATED 2011 EMPLOYEE STOCK PURCHASE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JUNE 29, 2011 APPROVED BY THE STOCKHOLDERS: SEPTEMBER 7, 2011 AMENDED AND RESTATED BY THE COMPENSATION COMMITTEE: FEBRUARY 8, 2012 AMENDED AND RESTATED BY THE COMPENSATION COMMITTEE: JULY 3, 2018 1. GENERAL. (a) This Plan is intended as t

September 13, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 12, 2018 NETSCOUT SYSTEMS, INC.

August 2, 2018 10-Q

NTCT / NetScout Systems, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 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.

July 27, 2018 DEFA14A

NTCT / NetScout Systems, Inc. DEFA14A

DEFA14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 27, 2018 DEF 14A

NTCT / NetScout Systems, Inc. DEF 14A

DEF 14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to § 240.

July 26, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 26, 2018 NETSCOUT SYSTEMS, INC.

July 26, 2018 EX-99.1

NETSCOUT Reports Financial Results for First Quarter Fiscal Year 2019

Exhibit 99.1 NETSCOUT Reports Financial Results for First Quarter Fiscal Year 2019 WESTFORD, Mass.-(BUSINESS WIRE)-July 26, 2018-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its first quarter of fiscal year 2019 ended June 30, 2018. “We delivered a relatively solid first-quarter earnings perf

May 31, 2018 SD

NTCT / NetScout Systems, Inc. SD

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NETSCOUT SYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 0000-26251 04-2837575 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road, Westford, MA 01886 (Address of princ

May 31, 2018 EX-1.01

NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2017 to December 31, 2017

EX-1.01 Exhibit 1.01 NETSCOUT SYSTEMS, INC. Conflict Minerals Report For the Reporting Period from January 1, 2017 to December 31, 2017 Introduction This Conflict Minerals Report (“Report”) of NetScout Systems, Inc. (“NETSCOUT” or the “Company”) has been prepared pursuant to Rule 13p-1 (the “Rule”) promulgated by the Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1

May 21, 2018 10-K

NTCT / NetScout Systems, Inc. 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2018 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

May 21, 2018 EX-21

SUBSIDIARIES OF NETSCOUT

Exhibit 21 SUBSIDIARIES OF NETSCOUT Name Jurisdiction of Incorporation AirMagnet, Inc.

May 3, 2018 EX-99.1

NETSCOUT Reports Financial Results for Fourth Quarter and Fiscal Year 2018

Exhibit 99.1 NETSCOUT Reports Financial Results for Fourth Quarter and Fiscal Year 2018 WESTFORD, Mass.-(BUSINESS WIRE)-May 3, 2018-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of service assurance, security, and business analytics, today announced financial results for its fourth quarter and fiscal year ended March 31, 2018. “Due to improved gross margins and lower operating costs, w

May 3, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 3, 2018 NETSCOUT SYSTEMS, INC.

April 25, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 23, 2018 NETSCOUT SYSTEMS, INC.

February 15, 2018 SC 13G/A

NTCT / NetScout Systems, Inc. / Neuberger Berman Group LLC - NONE Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 05)* Netscout SYS Inc (Name of Issuer) Common (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

February 14, 2018 SC 13G/A

NTCT / NetScout Systems, Inc. / BROWN CAPITAL MANAGEMENT LLC Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 23)* Netscout Systems, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2017 (Date o

February 9, 2018 SC 13G/A

NTCT / NetScout Systems, Inc. / VANGUARD GROUP INC Passive Investment

netscoutsystemsinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 5 )* Name of issuer: NetScout Systems Inc Title of Class of Securities: Common Stock CUSIP Number: 64115T104 Date of Event Which Requires Filing of this Statement: December 31, 2017 Check the appropriate

February 9, 2018 SC 13G/A

NTCT / NetScout Systems, Inc. / TURTLE CREEK ASSET MANAGEMENT INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* NETSCOUT SYSTEMS INC. (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which the

February 9, 2018 SC 13G

NTCT / NetScout Systems, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* NETSCOUT SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

February 2, 2018 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 1, 2018 NETSCOUT SYSTEMS, INC.

February 2, 2018 EX-10.1

Confirmation – Issuer Forward Repurchase Transaction, dated February 1, 2018, between NetScout Systems, Inc. and JPMorgan Chase Bank, National Association.

EX-10.1 2 d530953dex101.htm EX-10.1 Exhibit 10.1 February 1, 2018 To: NetScout Systems, Inc. 310 Littleton Road Westford, MA 01886 Attention: Paul M. Canavan, CFA Sr. Director, Corporate Finance Telephone: (978) 614-4192 Email: [email protected] From: JPMorgan Chase Bank, National Association London Branch 25 Bank Street Canary Wharf London E14 5JP England Re: Issuer Forward Repurchase Tra

February 2, 2018 EX-10.2

Confirmation – Issuer Forward Repurchase Transaction, dated February 1, 2018, between NetScout Systems, Inc. and Bank of America, N.A.

EX-10.2 3 d530953dex102.htm EX-10.2 Exhibit 10.2 February 1, 2018 To: NetScout Systems, Inc. 310 Littleton Road Westford, MA 01886 Attention: Paul M. Canavan, CFA Sr. Director, Corporate Finance Telephone: (978) 614-4192 Email: [email protected] From: Bank of America, N.A. c/o Merrill Lynch, Pierce, Fenner & Smith Incorporated One Bryant Park New York, NY 10036 Attention: Telephone: Email:

February 1, 2018 10-Q

NTCT / NetScout Systems, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2017 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.

January 30, 2018 EX-99.1

NETSCOUT SYSTEMS Reports Financial Results for Third Quarter Fiscal Year 2018

Exhibit 99.1 NETSCOUT SYSTEMS Reports Financial Results for Third Quarter Fiscal Year 2018 WESTFORD, Mass.-(BUSINESS WIRE)-January 30, 2018-NETSCOUT SYSTEMS, INC. (NASDAQ: NTCT), a leading provider of business assurance, a powerful combination of service assurance, cybersecurity, and business intelligence solutions, today announced financial results for its third quarter of fiscal year 2018 ended

January 30, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 30, 2018 NETSCOUT SYSTEMS, INC.

January 19, 2018 SC 13G

NTCT / NetScout Systems, Inc. / Turtle Creek Equity Fund Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 NETSCOUT SYSTEMS INC. (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) January 10, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which the Schedule is filed: ☐ R

January 18, 2018 EX-10.5

Amendment and Restatement Agreement dated as of January 16, 2018, to the Credit Agreement, dated as of July 14, 2015, by and among NetScout Systems, Inc.; certain subsidiaries of NetScout Systems, Inc. as loan parties; the lenders and issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent attaching the Amended and Restated Credit Agreement, dated as of January 16, 2018, by and among NetScout Systems, Inc.; JPMorgan Chase Bank, N.A., as administrative agent and collateral agent; JPMorgan Chase Bank, N.A., Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and KeyBanc Capital Markets Inc., as joint lead arrangers and joint bookrunners; SunTrust Bank, N.A., Santander Bank, N.A., U.S. Bank National Association and Fifth Third Bank, as co-documentation agents; and the lenders party thereto.

EX-10.5 Exhibit 10.5 EXECUTION VERSION AMENDMENT AND RESTATEMENT AGREEMENT dated as of January 16, 2018 (this ?Agreement?), to the Credit Agreement dated as of July 14, 2015 (the ?Existing Credit Agreement?), among NETSCOUT SYSTEMS, INC., a Delaware corporation (the ?Borrower?), the LENDERS party thereto and JPMORGAN CHASE BANK, N.A., as Administrative Agent (in such capacity, the ?Administrative

January 18, 2018 8-K

NTCT / NetScout Systems, Inc. 8-K (Current Report)

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 16, 2018 NETSCOUT SYSTEMS, INC.

January 10, 2018 8-K

NTCT / NetScout Systems, Inc. FORM 8-K (Current Report)

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 10, 2018 NETSCOUT SYSTEMS, INC.

January 10, 2018 EX-99.1

NETSCOUT SYSTEMS Reports Preliminary Financial Results for Third Quarter Fiscal Year 2018 and Revises Outlook for Fiscal Year 2018 Company Also Announces Plans to Increase its Credit Facility and Execute an Accelerated Share Repurchase Program

EX-99.1 EXHIBIT 99.1 Contacts: Investors Media Andrew Kramer Donna Candelori Vice President of Investor Relations Senior Public Relations Manager 978-614-4279 408-571-5226 [email protected] [email protected] NETSCOUT SYSTEMS Reports Preliminary Financial Results for Third Quarter Fiscal Year 2018 and Revises Outlook for Fiscal Year 2018 Company Also Announces Plans to Increase its Credit

November 6, 2017 SC 13G

NTCT / NetScout Systems, Inc. / TURTLE CREEK ASSET MANAGEMENT INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 NETSCOUT SYSTEMS INC. (Name of Issuer) Common Stock (Title of Class of Securities) 64115T104 (CUSIP Number) October 27, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which the Schedule is filed: ☐ R

November 6, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 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.

October 30, 2017 8-K

NetScout Systems FORM 8-K (Current Report/Significant Event)

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 24, 2017 NETSCOUT SYSTEMS, INC.

October 30, 2017 EX-3.1

3.2, 4.2

EX-3.1 Exhibit 3.1 AMENDED AND RESTATED BY-LAWS OF NETSCOUT SYSTEMS, INC. (As amended and restated on October 24, 2017) Table of Contents Page ARTICLE 1 - STOCKHOLDERS 1 1.1 Place of Meetings 1 1.2 Annual Meeting 1 1.3 Special Meetings 1 1.4 Notice of Meetings 1 1.5 Voting List 1 1.6 Quorum 1 1.7 Adjournments 1 1.8 Voting and Proxies 2 1.9 Action at Meeting 2 1.10 Introduction of Business at Meeti

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