X0508 4 2026-02-18 0001078075 NETSCOUT SYSTEMS INC NTCT 0001232884 SZABADOS MICHAEL C/O NETSCOUT SYSTEMS, INC. 310 LITTLETON ROAD WESTFORD MA 01886 1 1 Common Stock 2026-02-18 4 S 0 4000 29.18 D 36494 D Performance Stock Unit Common Stock 33600 33600 D The shares of Common Stock were sold pursuant to a 10b5-1 plan adopted by the Reporting Person on May 23, 2025. The price is N/A. On October 26, 2022, the reporting person was granted 18,000 performance stock units (the "Prior PSUs"), which shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on October 26, 2022, and ending on October 25, 2025. On November 3, 2025, the Compensation Committee of the Board determined that 0% of the Prior PSUs shall vest. Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of 27,240 unachieved PSUs. /s/ Jeff Levinson by Power of Attorney 2026-02-20