| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Bridgewater Associates · Ray Dalio | $4.3M | 0.02% | 99.83K | −47% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a NTCT trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Sep 10, 2026 | Perretta ChristopherDirector | Sale at price 38.00 per share. | 7K | $266.00K |
| Sep 9, 2026 | Hadzima Joseph G Jr.Director | — | 7K | — |
| Sep 9, 2026 | Grasso AlfredDirector | — | 7K | — |
| Sep 9, 2026 | Nash ShannonDirector | — | 7K | — |
| Sep 9, 2026 | Pelage MarleneDirector | — | 7K | — |
| Sep 9, 2026 | Vitale Vivian MDirector | — | 7K | — |
| Sep 9, 2026 | Perretta ChristopherDirector | — | 7K | — |
| Sep 9, 2026 | Egan John RDirector | — | 7K | — |
| Sep 9, 2026 | Donahue Robert EDirector | — | 7K | — |
| Aug 24, 2026 | Piazza Anthony JohnChief Financial Officer | — | 2.5K | — |
| Aug 24, 2026 | Munshi SanjayChief Operating Officer | — | 3K | — |
| Aug 24, 2026 | Szabados MichaelDirector | Sale at price 37.70 per share. | 4K | $150.80K |
| Aug 16, 2026 | Munshi SanjayChief Operating Officer | Sale at price 39.27 per share. | 2.3K | $89.10K |
| Aug 10, 2026 | Downing John WilliamOfficer | Sale at price 38.41 per share. | 8K | $307.28K |
| Jun 17, 2026 | Szabados MichaelDirector | — | 6K | — |
| Jun 17, 2026 | Singhal Anil KChief Executive Officer | — | 10.4K | — |
| Jun 17, 2026 | Downing John WilliamOfficer | — | 5.2K | — |
| Jun 14, 2026 | Szabados MichaelDirector | — | 6.3K | — |
| Jun 14, 2026 | Piazza Anthony JohnChief Financial Officer | — | 2K | — |
| Jun 14, 2026 | Munshi SanjayChief Operating Officer | — | 2.4K | — |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2.8 | 5.0 | 8.8 | 6.0 | 23.5 | 4.6 | -6.6 | -4.5 | 3.5 | -0.6 | +47.6% | ||
| 2025 | 10.1 | -5.7 | -6.6 | 0.0 | 8.7 | 8.6 | -13.7 | 16.2 | 3.8 | 7.6 | -3.3 | 0.7 | +24.9% |
| 2024 | -2.0 | 0.7 | 0.9 | -11.8 | 6.6 | -11.0 | 11.3 | 5.6 | 1.3 | -3.3 | 4.0 | -1.0 | −1.3% |
| 2023 | -1.3 | -11.4 | 0.7 | -5.0 | 12.2 | 1.4 | -9.7 | 2.4 | -2.1 | -22.1 | -8.0 | 9.3 | −32.5% |
| 2022 | -4.6 | -1.3 | 3.1 | -4.0 | 11.5 | -1.4 | 5.1 | -10.8 | -1.3 | 14.7 | 3.8 | -12.8 | −1.7% |
| 2021 | 6.6 | -3.5 | -0.2 | -7.0 | 12.2 | -2.9 | 0.8 | -4.7 | -1.7 | 0.4 | 10.5 | 10.6 | +20.6% |
| 2020 | 6.8 | -0.0 | -7.9 | 11.9 | 3.7 | -7.0 | -0.4 | -9.1 | -5.7 | -6.0 | 14.1 | 17.1 | +13.9% |
| 2019 | 9.7 | 5.6 | 2.6 | 4.7 | -16.6 | 3.6 | 2.6 | -14.9 | 4.1 | 5.0 | 4.0 | -4.5 | +1.9% |
| 2018 | -6.4 | -6.8 | -0.8 | 3.0 | -0.6 | 10.0 | -9.8 | -6.7 | 1.0 | 0.0 | 6.0 | -11.8 | −22.4% |
| 2017 | 5.7 | 11.0 | 2.7 | -0.8 | -2.8 | -6.0 | 0.3 | -5.1 | -1.2 | -12.2 | 9.3 | -1.9 | −3.3% |
| 2016 | -29.8 | -4.1 | 11.1 | -3.1 | 9.0 | -8.3 | 25.8 | 5.7 | -1.1 | -6.2 | 13.7 | 1.0 | +2.6% |
| 2015 | -1.8 | 12.3 | 8.8 | -6.3 | -2.5 | -8.5 | 8.8 | -8.4 | -3.2 | 1.4 | -7.7 | -7.3 | −16.0% |
| 2014 | 19.4 | 7.5 | -1.1 | 3.7 | -0.2 | 14.1 | -4.1 | 8.3 | -0.6 | -19.5 | 3.5 | -4.2 | +23.5% |
| 2013 | 0.2 | -2.3 | -3.4 | -7.2 | 6.8 | -4.1 | 13.7 | -6.4 | 2.8 | 11.0 | 7.4 | -2.8 | +13.9% |
| 2012 | 17.4 | 2.8 | -4.2 | 1.7 | -3.1 | 7.7 | 8.2 | 1.7 | 7.4 | -3.1 | 1.6 | 3.5 | +47.7% |
| 2011 | -0.4 | 9.0 | 9.3 | -6.3 | -9.3 | -10.0 | -27.0 | -9.5 | -17.2 | 43.5 | 7.8 | -0.4 | −23.5% |
| 2010 | -4.0 | 3.9 | 1.4 | -1.8 | -6.8 | 5.1 | 11.5 | -0.1 | 29.6 | 14.4 | -5.9 | 4.2 | +57.4% |
| 2009 | 65.0 | -7.1 | -45.8 | 25.6 | 4.3 | 0.0 | 6.1 | 15.2 | 17.9 | -9.0 | 2.4 | 16.1 | +69.6% |
| 2008 | -23.2 | -5.3 | 0.1 | 7.5 | 27.1 | -16.0 | 27.5 | 9.4 | -28.6 | -9.6 | -17.4 | 8.4 | −32.5% |
| 2007 | 0.6 | 3.4 | 4.9 | -9.1 | -1.7 | 7.2 | 12.0 | -4.2 | 17.2 | 41.8 | -21.4 | 5.1 | +53.9% |
NetScout Systems, Inc. provides carrier service assurance, cybersecurity, and Distributed Denial-of-Service (DDoS) solutions to protect digital business services against disruptions. It offers nGeniusONE management software to predict, preempt, and resolve network and service delivery problems, as well as facilitate the optimization and capacity planning of their network infrastructures; and specialized platforms and analytic modules to analyze and troubleshoot traffic in radio access and Wi-Fi networks; and Omnis Insights, a solution that is designed to generate a high-fidelity and curated dataset that strengthens observability and cybersecurity operations. Its platform provides real-time generation and analysis of information-rich, high-volume network-derived data for use its applications and partner networks. In addition, it offers ISNG, a real-time information platform that provides insights to optimize network performance; packet flow systems that delivers targeted network traffic access to a range of monitoring and cybersecurity tools and systems, including the nGeniusONE application; vSTREAM, a virtualized form factor version; Infinistream, an advanced passive network probe; and markets test access points that enables full and non-disruptive access to network traffic. Further, the company provides cybersecurity solutions to protect networks against DDoS attacks under the Arbor solutions, including Arbor Sightline, Arbor Threat Mitigation System, Arbor Insight, Arbor Edge Defense, and Omnis Cyber Intelligence solutions. It serves enterprise customers in financial services, technology, manufacturing, healthcare, utilities, education, transportation, and retail; mobile, wireline, and cable operators, internet service providers, and cloud providers industries; and government and associated agencies through a direct sales force, and indirect reseller and distribution channels. The company was incorporated in 1984 and is headquartered in Westford, Massachusetts.
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