Who owns NetScout Systems, Inc.?
Institutional ownership of NTCT from SEC Form 13F filings across 219 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
219
13F holders
$2.22B
value, 2026 filers
73.2%
of shares outstanding (52.5M sh)
39
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of NTCT's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 11.4M | $498.0M | 0.0% | 15.9% | +0.4% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 5.6M | $243.5M | 0.0% | 7.8% | +1.1% |
| 3 | Legal & General Group Plc | 3.8M | $166.0M | 0.0% | 5.3% | +4.8% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | $133.1M | 0.0% | 4.3% | -49.8% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 2.2M | $93.8M | 0.0% | 3% | +17.4% |
| 6 | Robeco Institutional Asset Management B.V. | 2.1M | $89.5M | 0.1% | 2.9% | +2.2% |
| 7 | FIRST TRUST ADVISORS LP | 2.0M | $85.5M | 0.1% | 2.7% | +12.5% |
| 8 | WELLINGTON MANAGEMENT GROUP LLP | 1.3M | $54.8M | 0.0% | 1.8% | +16.8% |
| 9 | Allianz Asset Management GmbH | 1.3M | $54.6M | 0.0% | 1.7% | +5.7% |
| 10 | AMERIPRISE FINANCIAL INC | 1.0M | $43.8M | 0.0% | 1.4% | +83.2% |
| 11 | Sixth Street Partners Management Company, L.P.NEW | 1.0M | $43.7M | 7.5% | 1.4% | new |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.0M | $43.7M | 0.0% | 1.4% | -5.2% |
| 13 | NORTHERN TRUST CORP | 783,277 | $34.1M | 0.0% | 1.1% | +6.2% |
| 14 | ACADIAN ASSET MANAGEMENT LLC | 768,068 | $33,438 | 0.0% | 1.1% | +272.4% |
| 15 | MORGAN STANLEY | 676,388 | $29.5M | 0.0% | 0.9% | -5.3% |
| 16 | Public Sector Pension Investment Board | 614,328 | $26.8M | 0.1% | 0.9% | +103.8% |
| 17 | LAZARD ASSET MANAGEMENT LLC | 591,598 | $25.8M | 0.0% | 0.8% | +1.1% |
| 18 | FMR LLC | 590,593 | $25.7M | 0.0% | 0.8% | +82.6% |
| 19 | Nuveen, LLC | 584,926 | $25.5M | 0.0% | 0.8% | +4.2% |
| 20 | Qube Research & Technologies Ltd | 534,625 | $23.3M | 0.0% | 0.7% | +80.6% |
| 21 | Bank of New York Mellon Corp | 452,403 | $19.7M | 0.0% | 0.6% | +0.7% |
| 22 | VANGUARD FIDUCIARY TRUST CO | 452,005 | $19.7M | 0.0% | 0.6% | +2.0% |
| 23 | TWO SIGMA INVESTMENTS, LP | 449,621 | $19.6M | 0.0% | 0.6% | +3.0% |
| 24 | MILLENNIUM MANAGEMENT LLC | 432,729 | $18.8M | 0.0% | 0.6% | +526.1% |
| 25 | PRINCIPAL FINANCIAL GROUP INC | 402,439 | $17.5M | 0.0% | 0.6% | +0.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.