Who owns NetScout Systems (NTCT)
Which tracked institutional funds hold NTCT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See NTCT company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on NTCT is one-sided between 2026-Q1 and 2026-Q2: 125 added or opened and 39 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
NTCT’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes NTCT more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in NTCT divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 290 tracked filers holding NTCT, 156 increased or opened the position and 141 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in NTCT between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 12
- Clark Capital Management Group, Inc.$12M
- COMPASS FINANCIAL MANAGEMENT LLC$2M
- TUDOR INVESTMENT CORP ET AL$2M
- Brevan Howard Capital Management LP$2M
- Jupiter Topco LLC$1M
- McAdam, LLC$1M
Full exits 25
- LSV ASSET MANAGEMENT$87M
- SG Americas Securities, LLC$20M
- CSM Advisors, LLC$15M
- Penserra Capital Management LLC$9M
- Alyeska Investment Group, L.P.$9M
- ACADIAN ASSET MANAGEMENT LLC$7M
Largest adds
- BlackRock, Inc.$253M
- VANGUARD PORTFOLIO MANAGEMENT LLC$68M
- DIMENSIONAL FUND ADVISORS LP$53M
- STATE STREET CORP$52M
- Legal & General Group Plc$50M
- VANGUARD CAPITAL MANAGEMENT LLC$36M
Largest trims
- BARCLAYS PLC$6M
- DEUTSCHE BANK AG\$5M
- UBS Group AG$5M
- Edgestream Partners, L.P.$3M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$2M
- Bridgewater Associates, LP$2M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 11,435,751 | $498M | 18.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 5,590,843 | $243M | 9.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 4,327,997 | $188M | 7.1% | 2026-Q2 |
| Legal & General Group Plc added | 3,811,022 | $166M | 6.3% | 2026-Q2 |
| STATE STREET CORP added | 3,579,289 | $156M | 5.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 3,055,146 | $133M | 5.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,153,392 | $94M | 3.5% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. added | 2,056,142 | $90M | 3.4% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 1,962,833 | $85M | 3.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,258,576 | $55M | 2.1% | 2026-Q2 |
| Allianz Asset Management GmbH added | 1,253,154 | $55M | 2.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 1,059,810 | $46M | 1.7% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 1,005,214 | $44M | 1.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,003,431 | $44M | 1.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 783,277 | $34M | 1.3% | 2026-Q2 |
| MORGAN STANLEY trimmed | 676,388 | $29M | 1.1% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 613,489 | $27M | 1.0% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 591,598 | $26M | 1.0% | 2026-Q2 |
| FMR LLC added | 590,593 | $26M | 1.0% | 2026-Q2 |
| Nuveen, LLC added | 584,926 | $25M | 1.0% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 534,625 | $23M | 0.9% | 2026-Q2 |
| Impax Asset Management Group plc trimmed | 470,000 | $20M | 0.8% | 2026-Q2 |
| Bank of New York Mellon Corp added | 452,403 | $20M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 452,005 | $20M | 0.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 449,621 | $20M | 0.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 432,729 | $19M | 0.7% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD | 421,435 | $18M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 402,439 | $18M | 0.7% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 375,065 | $16M | 0.6% | 2026-Q2 |
| SEB Asset Management AB trimmed | 365,685 | $16M | 0.6% | 2026-Q2 |
| Empowered Funds, LLC trimmed | 340,099 | $15M | 0.6% | 2026-Q2 |
| Invesco Ltd. trimmed | 338,925 | $15M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 329,249 | $14M | 0.5% | 2026-Q2 |
| Hillsdale Investment Management Inc. added | 307,795 | $13M | 0.5% | 2026-Q2 |
| Public Sector Pension Investment Board added | 307,164 | $13M | 0.5% | 2026-Q2 |
| SEI INVESTMENTS CO added | 300,942 | $13M | 0.5% | 2026-Q2 |
| Defiance ETFs, LLC trimmed | 285,635 | $12M | 0.5% | 2026-Q2 |
| Clark Capital Management Group, Inc. new | 267,486 | $12M | 0.4% | 2026-Q2 |
| BARCLAYS PLC trimmed | 264,176 | $12M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 257,561 | $11M | 0.4% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 248,402 | $11M | 0.4% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 246,874 | $11M | 0.4% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 224,996 | $10M | 0.4% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 206,809 | $9M | 0.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 205,477 | $9M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 180,896 | $8M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 177,624 | $8M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 176,834 | $8M | 0.3% | 2026-Q2 |
| LEUTHOLD GROUP, LLC trimmed | 173,744 | $8M | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 162,924 | $7M | 0.3% | 2026-Q2 |
| Creative Planning added | 158,890 | $7M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 147,875 | $6M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 147,138 | $6M | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 139,385 | $6M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 137,728 | $6M | 0.2% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 136,213 | $6M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 130,935 | $6M | 0.2% | 2026-Q2 |
| Riverwater Partners LLC added | 130,664 | $6M | 0.2% | 2026-Q2 |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd trimmed | 119,631 | $5M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 118,202 | $5M | 0.2% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 109,218 | $5M | 0.2% | 2026-Q2 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 109,158 | $5M | 0.2% | 2026-Q2 |
| IEQ CAPITAL, LLC trimmed | 102,819 | $4M | 0.2% | 2026-Q2 |
| GABELLI FUNDS LLC added | 100,000 | $4M | 0.2% | 2026-Q2 |
| Bridgewater Associates, LP trimmed | 99,831 | $4M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 97,172 | $4M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 95,037 | $4M | 0.2% | 2026-Q2 |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management added | 94,629 | $4M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 93,118 | $3M | 0.1% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 91,609 | $4M | 0.2% | 2026-Q2 |
| UBS Group AG trimmed | 89,484 | $4M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 85,981 | $4M | 0.1% | 2026-Q2 |
| RITHOLTZ WEALTH MANAGEMENT added | 85,551 | $4M | 0.1% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 84,687 | $4M | 0.1% | 2026-Q2 |
| Rodgers Brothers Inc. trimmed | 78,175 | $3M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 76,853 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 76,100 | $3M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 72,655 | $3M | 0.1% | 2026-Q2 |
| Odyssean, LLC added | 71,772 | $3M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 69,745 | $3M | 0.1% | 2026-Q2 |
| KLP KAPITALFORVALTNING AS | 64,200 | $3M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 62,950 | $3M | 0.1% | 2026-Q2 |
| Trexquant Investment LP added | 62,856 | $3M | 0.1% | 2026-Q2 |
| New Age Alpha Advisors, LLC trimmed | 61,978 | $3M | 0.1% | 2026-Q2 |
| Integrated Quantitative Investments LLC trimmed | 59,664 | $3M | 0.1% | 2026-Q2 |
| Dakota Wealth Management added | 55,746 | $2M | 0.1% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 55,705 | $2M | 0.1% | 2026-Q2 |
| COMPASS FINANCIAL MANAGEMENT LLC new | 54,181 | $2M | 0.1% | 2026-Q2 |
| Mariner, LLC trimmed | 54,006 | $2M | 0.1% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC added | 53,305 | $2M | 0.1% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 51,994 | $2M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 51,900 | $2M | 0.1% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP trimmed | 51,740 | $2M | 0.1% | 2026-Q2 |
| Edgestream Partners, L.P. trimmed | 50,585 | $2M | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 48,743 | $2M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 47,702 | $2M | 0.1% | 2026-Q2 |
| Horizon Investments, LLC added | 47,667 | $2M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 46,286 | $2M | 0.1% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 46,237 | $2M | 0.1% | 2026-Q2 |
| Cerity Partners LLC trimmed | 44,490 | $2M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.