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 20, 2007 NETSCOUT SYSTEMS, INC. ---------------------- (Exact name of registrant as specified in its charter) Delaware -------- (State or other jurisdiction of incorporation) 0000-26251 04-2837575 ---------------------------- ----------------------------------- (Commission File Number) (IRS Employer Identification No.) 310 Littleton Road Westford, Massachusetts 01886 ----------------------------------------- ------------------------ (Address of principal executive offices) (Zip Code) (978) 614-4000 -------------- (Registrant's telephone number, including area code) Not Applicable -------------- (Former Name or Former Address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) -------------------------------------------------------------------------------- Item 1.01. Entry into Material Definitive Agreement; Item 2.03. Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant On July 20, 2007, NetScout Systems, Inc. (the "Company") and Silicon Valley Bank (the "Lender") entered into a Loan Modification Agreement (the "Loan Modification Agreement") pursuant to which the maturity date for amounts that are or may become due under the Amended and Restated Loan and Security Agreement dated as of March 12, 1998, as amended to date (the "Loan Agreement"), was extended until June 4, 2009. Under the Loan Agreement, the Company may borrow up to $10 million. In addition to the forgoing, the Loan Modification Agreement also modified the financial reporting obligations to the Lender by requiring that the Company (1) deliver to the Lender copies of its Form 10-K and Form 10-Q filings within five days of filing; (2) promptly report any legal actions pending or threatened against the Company or any subsidiary that could result in damages or costs to the Company or any subsidiary in excess of $100,000 or (3) other financial information reasonably requested by the Lender. A copy of the Loan Modification Agreement is attached hereto as Exhibit 10.1 and incorporated herein by reference. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. The Company hereby files the following exhibits: 10.1 Loan Modification Agreement dated July 20, 2007 by and between the Company and Silicon Valley Bank SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. NETSCOUT SYSTEMS, INC. By: /s/ David P. Sommers ----------------------------------- David P. Sommers Chief Financial Officer and Senior Vice President, General Operations Date: July 25, 2007 EXHIBIT INDEX Exhibit Number Description ------------------- --------------------------------------------------------- 10.1 Loan Modification Agreement dated July 20, 2007 by and between the Company and Silicon Valley Bank.