X0508 4 2023-09-14 0 0001078075 NETSCOUT SYSTEMS INC NTCT 0001189174 EGAN JOHN R C/O NETSCOUT SYSTEMS, INC. 310 LITTLETON ROAD WESTFORD MA 01886 1 0 0 0 0 Restricted Stock Unit 2023-09-14 4 A 0 7000 A Common Stock 7000 7000 D Price is N/A. Date is N/A. All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member which are held during the corporation's 2024 fiscal year; provided that, in the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/14/2026; subject, in each case, to the reporting person's continuous service with the corporation through the applicable vesting date. By: /s/ Greg Sloan, by Power of Attorney 2023-09-18