JOHN DOWNING - 18 Feb 2026 Form 4 Insider Report for NETSCOUT SYSTEMS INC (NTCT)

Signature
/s/ Jeff Levinson by Power of Attorney
Issuer symbol
NTCT
Transactions as of
18 Feb 2026
Net transactions value
-$87,540
Form type
4
Filing time
20 Feb 2026, 16:04:35 UTC
Previous filing
07 Nov 2025
Next filing
23 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DOWNING JOHN EVP, World-Wide Sales C/O NETSCOUT SYSTEMS, INC., 310 LITTLETON ROAD, WESTFORD /s/ Jeff Levinson by Power of Attorney 20 Feb 2026 0001232878

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction NTCT Common Stock Sale $87,540 -3,000 -2.2% $29.18 132,494 18 Feb 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding NTCT Performance Stock Unit 43,200 18 Feb 2026 Common Stock 43,200 Direct F2, F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 The shares of Common Stock were sold pursuant to a 10b5-1 plan adopted by the Reporting Person on February 20, 2025.
F2 The price is N/A.
F3 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.
F4 Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of 25,920 unachieved PSUs.