NETSCOUT SYS INC NTCT
COM · Common Stock · CUSIP 64115T104
- SectorTechnology
- IndustryServices-Computer Integrated Systems Design
- HeadquartersWestford, MA
- Founded1984
- Websitenetscout.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($18.5m this quarter). Holder counts are more reliable. Shares outstanding: 72.7m as of 2026-07-28, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $43.51. Options: 5 managers hold calls ($1.5m notional), 1 hold puts ($256.9k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 212 |
| Q4 2022 | 227 |
| Q1 2023 | 222 |
| Q2 2023 | 214 |
| Q3 2023 | 215 |
| Q4 2023 | 208 |
| Q1 2024 | 209 |
| Q2 2024 | 220 |
| Q3 2024 | 215 |
| Q4 2024 | 219 |
| Q1 2025 | 234 |
| Q2 2025 | 241 |
| Q3 2025 | 244 |
| Q4 2025 | 263 |
| Q1 2026 | 289 |
| Q2 2026 | 315 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 94 | 117 |
| Q4 2024 | 114 | 87 |
| Q1 2025 | 119 | 90 |
| Q2 2025 | 118 | 111 |
| Q3 2025 | 129 | 97 |
| Q4 2025 | 134 | 109 |
| Q1 2026 | 149 | 109 |
| Q2 2026 | 156 | 126 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $62.0k | $0 | 0.00 |
| Q4 2025 | $1.1m | $16.2k | 0.02 |
| Q1 2026 | $2.2m | $365.6k | 0.17 |
| Q2 2026 | $1.5m | $256.9k | 0.17 |
Biggest buyers
| ACADIAN ASSET MANAGEMENT LLC | Added | +561.8k |
| AMERIPRISE FINANCIAL INC | Added | +456.4k |
| LSV ASSET MANAGEMENT | Added | +416.2k |
| MILLENNIUM MANAGEMENT LLC | Added | +363.6k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +318.9k |
| STATE STREET CORP | Added | +301.9k |
| First Eagle Investment Management, LLC | Added | +296.8k |
| Clark Capital Management Group, Inc. | New | +267.5k |
| FMR LLC | Added | +267.2k |
| Qube Research & Technologies Ltd | Added | +238.6k |
Biggest sellers
| SG Americas Securities, LLC | Reduced | -517.0k |
| BARCLAYS PLC | Reduced | -297.1k |
| Alyeska Investment Group, L.P. | Sold out | -290.6k |
| DEUTSCHE BANK AG\ | Reduced | -228.7k |
| UBS Group AG | Reduced | -195.9k |
| AQR CAPITAL MANAGEMENT LLC | Reduced | -140.3k |
| Edgestream Partners, L.P. | Reduced | -120.8k |
| JANE STREET GROUP, LLC | Sold out | -118.4k |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | -117.3k |
| Pacer Advisors, Inc. | Reduced | -114.3k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $753.4k17.3k shares |
| CITADEL ADVISORS LLC | Reduced | $248.2k5.7k shares |
| JANE STREET GROUP, LLC | New | $213.4k4.9k shares |
| IMC-Chicago, LLC | New | $204.7k4.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $95.8k2.2k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $256.9k5.9k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution -1.1 pts · filed 2025-10-17 | 14.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.8% |
| Legal & General Investment Management Ltd 13G · institution filed 2025-07-09 | 5.7% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-07-31 | 5.0% |
| STATE STREET CORP 13G · institution new · filed 2026-08-07 | 5.0% |
| Legal & General Group Plc 13G · institution -1.3 pts · filed 2026-05-08 | 5.0% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 3 | $351.6k | $351.6k |
| Q1 2025 | 0 | — | 3 | $512.3k | $512.3k |
| Q2 2025 | 0 | — | 3 | $324.7k | $324.7k |
| Q3 2025 | 0 | — | 4 | $500.2k | $500.2k |
| Q4 2025 | 0 | — | 5 | $701.1k | $701.1k |
| Q1 2026 | 0 | — | 3 | $352.6k | $352.6k |
| Q2 2026 | 0 | — | 4 | $755.5k | $755.5k |
| Q3 2026 | 0 | — | 4 | $813.2k | $662.4k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-11 | Perretta Christopher Director | Sold plan | $266.0k7.0k shares |
| 2026-08-25 | SZABADOS MICHAEL Director | Sold | $150.8k4.0k shares |
| 2026-08-17 | Munshi Sanjay Chief Operating Officer | Sold plan | $89.1k2.3k shares |
| 2026-08-11 | DOWNING JOHN EVP, Worldwide Sales Ops | Sold plan | $307.3k8.0k shares |
| 2026-06-08 | DOWNING JOHN EVP, World-Wide Sales | Sold plan | $322.3k8.0k shares |
| 2026-05-15 | SZABADOS MICHAEL Director | Sold plan | $153.6k4.0k shares |
| 2026-05-15 | Munshi Sanjay Chief Operating Officer | Sold plan | $76.2k2.0k shares |
| 2026-05-12 | Grasso Alfred Director | Sold plan | $203.3k5.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 11.4m $498.0m | Added +46.8k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 5.6m $243.5m | Added +62.0k |
| DIMENSIONAL FUND ADVISORS LP 0.03% of their portfolio | 4.3m $188.5m | Added +69.0k |
| Legal & General Group Plc 0.03% of their portfolio | 3.8m $166.0m | Added +175.9k |
| STATE STREET CORP 0.00% of their portfolio | 3.6m $155.9m | Added +301.9k |
| LSV ASSET MANAGEMENT 0.25% of their portfolio | 3.2m $137.7m | Added +416.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 3.1m $133.1m | Added +9.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 2.2m $93.8m | Added +318.9k |
| Robeco Institutional Asset Management B.V. 0.11% of their portfolio | 2.1m $89.5m | Added +44.6k |
| FIRST TRUST ADVISORS LP 0.05% of their portfolio | 2.0m $85.5m | Added +218.3k |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 1.3m $54.8m | Added +181.4k |
| Allianz Asset Management GmbH 0.06% of their portfolio | 1.3m $54.6m | Added +68.1k |
| AQR CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 1.1m $45.8m | Reduced -140.3k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 1.0m $43.8m | Added +456.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.0m $43.7m | Reduced -54.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 783.3k $34.1m | Added +45.5k |
| ACADIAN ASSET MANAGEMENT LLC 0.04% of their portfolio | 768.1k $33.4m | Added +561.8k |
| MORGAN STANLEY 0.00% of their portfolio | 676.4k $29.5m | Reduced -38.1k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.47% of their portfolio | 613.5k $26.7m | Reduced -20.6k |
| LAZARD ASSET MANAGEMENT LLC 0.04% of their portfolio | 591.6k $25.8m | Added +6.6k |
| FMR LLC 0.00% of their portfolio | 590.6k $25.7m | Added +267.2k |
| Nuveen, LLC 0.01% of their portfolio | 584.9k $25.5m | Added +23.7k |
| Qube Research & Technologies Ltd 0.03% of their portfolio | 534.6k $23.3m | Added +238.6k |
| First Eagle Investment Management, LLC 0.02% of their portfolio | 496.8k $21.6m | Added +296.8k |
| CSM Advisors, LLC 0.45% of their portfolio | 482.3k $21.0m | Added +22.0k |
| Impax Asset Management Group plc 0.13% of their portfolio | 470.0k $20.5m | Reduced -52.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 452.4k $19.7m | Added +3.1k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 452.0k $19.7m | Added +8.8k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 449.6k $19.6m | Added +13.0k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 432.7k $18.8m | Added +363.6k |
| JUPITER ASSET MANAGEMENT LTD 0.09% of their portfolio | 421.4k $18.4m | Unchanged |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 402.4k $17.5m | Added +732 |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 375.1k $16.3m | Reduced -61.2k |
| SEB Asset Management AB 0.06% of their portfolio | 365.7k $15.9m | Reduced -79.0k |
| Empowered Funds, LLC 0.08% of their portfolio | 340.1k $14.8m | Reduced -50.4k |
| Invesco Ltd. 0.00% of their portfolio | 338.9k $14.8m | Reduced -114.0k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 329.2k $14.3m | Reduced -71.0k |
| Hillsdale Investment Management Inc. 0.31% of their portfolio | 307.8k $13.4m | Added +27.3k |
| Public Sector Pension Investment Board 0.04% of their portfolio | 307.2k $13.4m | Added +5.8k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 300.9k $13.1m | Added +75.5k |
| Penserra Capital Management LLC 0.10% of their portfolio | 285.6k $12.4m | Reduced -7.6k |
| Defiance ETFs, LLC 0.17% of their portfolio | 285.6k $12.3m | Reduced -7.6k |
| Clark Capital Management Group, Inc. 0.06% of their portfolio | 267.5k $11.6m | New |
| BARCLAYS PLC 0.00% of their portfolio | 264.2k $11.5m | Reduced -297.1k |
| Pacer Advisors, Inc. 0.03% of their portfolio | 263.8k $11.5m | Reduced -114.3k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 257.6k $11.2m | Added +193.0k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 246.9k $10.7m | Added +80.8k |
| Allspring Global Investments Holdings, LLC 0.01% of their portfolio | 225.0k $9.7m | Reduced -59.0k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 206.8k $9.0m | Added +18.6k |
| Connor, Clark & Lunn Investment Management Ltd. 0.02% of their portfolio | 205.5k $8.9m | Reduced -117.3k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.01% of their portfolio | 180.9k $7.9m | Reduced -41.8k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 177.6k $7.7m | Reduced -228.7k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 176.8k $7.7m | Reduced -19.7k |
| LEUTHOLD GROUP, LLC 0.76% of their portfolio | 173.7k $7.6m | Reduced -9.1k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 162.9k $7.1m | Added +11.0k |
| Creative Planning 0.00% of their portfolio | 158.9k $6.9m | Added +25.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 147.9k $6.4m | Reduced -14.5k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 147.1k $6.4m | Added +56.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 139.4k $6.0m | Reduced -20.5k |
| Swiss National Bank 0.00% of their portfolio | 137.7k $6.0m | Reduced -5.0k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.01% of their portfolio | 136.2k $5.9m | Reduced -1.5k |
| ALGERT GLOBAL LLC 0.07% of their portfolio | 130.9k $5.7m | Added +40.1k |
| Riverwater Partners LLC 1.69% of their portfolio | 130.7k $5.7m | Added +88.5k |
| SG Americas Securities, LLC 0.00% of their portfolio | 119.7k $5.2m | Reduced -517.0k |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.33% of their portfolio | 119.6k $5.2m | Reduced -24.3k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 118.2k $5.1m | Added +4.6k |
| BESSEMER GROUP INC 0.01% of their portfolio | 113.6k $4.9m | Unchanged |
| MARTINGALE ASSET MANAGEMENT L P 0.11% of their portfolio | 109.2k $4.8m | Reduced -1.4k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.02% of their portfolio | 109.2k $4.8m | Added +58.9k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 107.5k $4.7m | Added +25.6k |
| IEQ CAPITAL, LLC 0.02% of their portfolio | 102.8k $4.5m | Reduced -29.1k |
| GABELLI FUNDS LLC 0.03% of their portfolio | 100.0k $4.4m | Added +10.0k |
| Bridgewater Associates, LP 0.02% of their portfolio | 99.8k $4.3m | Reduced -87.5k |
| FEDERATED HERMES, INC. 0.01% of their portfolio | 97.2k $4.2m | Reduced -15.6k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 95.0k $4.1m | Added +14.0k |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 0.06% of their portfolio | 94.6k $4.1m | Added +994 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 93.1k $3.0m | Added +23.5k |
| SEGALL BRYANT & HAMILL, LLC 0.05% of their portfolio | 91.6k $4.0m | Reduced -7.2k |
| UBS Group AG 0.00% of their portfolio | 89.5k $3.9m | Reduced -195.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 86.0k $3.7m | Added +38.0k |
| RITHOLTZ WEALTH MANAGEMENT 0.06% of their portfolio | 85.6k $3.7m | Added +32.5k |
| WEDGE CAPITAL MANAGEMENT L L P/NC 0.06% of their portfolio | 84.7k $3.7m | Added +10.4k |
| Rodgers Brothers Inc. 0.33% of their portfolio | 78.2k $3.4m | Reduced -1.0k |
| CITIGROUP INC 0.00% of their portfolio | 76.9k $3.3m | Added +18.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 76.1k $3.3m | Reduced -6.2k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 72.7k $3.2m | Reduced -220 |
| Odyssean, LLC 0.51% of their portfolio | 71.8k $3.1m | Added +22.0k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.06% of their portfolio | 69.7k $3.0m | Unchanged |
| KLP KAPITALFORVALTNING AS 0.01% of their portfolio | 64.2k $2.8m | Unchanged |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 63.0k $2.7m | Unchanged |
| Trexquant Investment LP 0.02% of their portfolio | 62.9k $2.7m | Added +24.8k |
| New Age Alpha Advisors, LLC 0.11% of their portfolio | 62.0k $2.7m | Reduced -198 |
| Integrated Quantitative Investments LLC 0.43% of their portfolio | 59.7k $2.6m | Reduced -19.2k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 56.8k $2.5m | Reduced -16.0k |
| Dakota Wealth Management 0.05% of their portfolio | 55.7k $2.4m | Added +26.8k |
| PICTON MAHONEY ASSET MANAGEMENT 0.02% of their portfolio | 55.7k $2.4m | Added +39.7k |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio | 54.3k $1.5m | Added +5.0k |
| COMPASS FINANCIAL MANAGEMENT LLC 0.29% of their portfolio | 54.2k $2.3m | First filing |
| Mariner, LLC 0.00% of their portfolio | 54.0k $2.4m | Reduced -8.4k |
| EXCHANGE TRADED CONCEPTS, LLC 0.01% of their portfolio | 53.3k $2.3m | Added +2.3k |