Netscout Systems Inc
NTCT- Exchange
- Nasdaq
- Industry
- Services-Computer Integrated Systems Design
- SEC CIK
- 0001078075
In the last 90 days, Netscout Systems Inc insiders filed 0 open-market purchases and 4 sales; 316 institutions reported holding it in 13F filings for Q2 2026, worth $2.98B in total; no superinvestor holds it.
Holders of 5% or more of NTCT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Netscout Systems Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.80%10.6M shares | −1.10 ppfrom 15.90% | Apr 30, 20252 filings | Oct 17, 2025 | SEC |
| Vanguard Portfolio Management LLC | 13G | 7.77%5.61M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Legal & General Investment Management Ltd | 13G/A | 5.69%4.04M shares | – | Jul 9, 20251 filing | Jul 9, 2025 | SEC |
| Vanguard Capital Management LLC | 13G | 5.01%3.59M shares | New | Jul 31, 20261 filing | Jul 31, 2026 | SEC |
| Legal & General Group Plc | 13G | 5.00%3.64M shares | −1.30 ppfrom 6.30% | Nov 14, 20243 filings | May 8, 2026 | SEC |
| State Street Corp | 13G | 5.00%3.58M shares | New | Aug 7, 20261 filing | Aug 7, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
10 Schedule 13D and 13G filings on Netscout Systems Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 7, 202610:16 AM ET | State Street Corp | 13G | 5.00%3.58M shares | New | Jun 30, 2026 | SEC |
| Jul 31, 202610:46 AM ET | Vanguard Capital Management LLC | 13G | 5.01%3.59M shares | New | Jun 30, 2026 | SEC |
| May 8, 20268:30 AM ET | Legal & General Group Plcand 5 others | 13G | 5.00%3.64M shares | −1.30 ppfrom 6.30% | Mar 31, 2026 | SEC |
| Apr 29, 20262:51 PM ET | Vanguard Portfolio Management LLC | 13G | 7.77%5.61M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202610:51 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Oct 17, 20256:24 PM ET | BlackRock, Inc. | 13G/A | 14.80%10.6M shares | −1.10 ppfrom 15.90% | Sep 30, 2025 | SEC |
| Aug 11, 202510:35 AM ET | Legal & General Group Plcand 5 others | 13G | 6.30%4.48M shares | +1.20 ppfrom 5.10% | Jun 30, 2025 | SEC |
| Jul 9, 20257:01 AM ET | Legal & General Investment Management Ltdand 4 others | 13G/A | 5.69%4.04M shares | – | Dec 31, 2023 | SEC |
| Apr 30, 20258:49 AM ET | BlackRock, Inc. | 13G/A | 15.90%11.4M shares | – | Mar 31, 2025 | SEC |
| Nov 14, 202411:53 AM ET | Legal & General Group Plcand 4 others | 13G | 5.10%3.66M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Netscout Systems Inc shares.
No Form 144 notices for Netscout Systems Inc are on file.