X0306 4 2022-08-09 0 0001078075 NETSCOUT SYSTEMS INC NTCT 0001183333 BUA JEAN A C/O NETSCOUT SYSTEMS, INC. 310 LITTLETON ROAD WESTFORD MA 01886 0 1 0 0 See Remarks Common Stock 2022-08-09 4 F 0 5947 33.95 D 77481 D The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the delivery of shares pursuant to Restricted Stock Units which vested on August 1, 2022 and which shares of Common Stock were delivered to the reporting person on August 9, 2022. Represents the closing price of the Company's Common Stock on August 8, 2022. Officer Title: EVP, Chief Financial Officer and Treasurer By: /s/ Greg Sloan, by Power of Attorney 2022-08-11