Comparable stake leader
BlackRock, Inc.
SEC ownership of NETSCOUT SYSTEMS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001078075.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- NTCT on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001078075
- Issuer location
- Westford, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NETSCOUT SYSTEMS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13F
13D/G
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
VANGUARD PORTFOLIO MANAGEMENT LLC
7.8%
Legal & General Investment Manage...
5.7%
Legal & General Group Plc
5%
DIMENSIONAL FUND ADVISORS LP
5.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$362,055,915
11,388,987 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
7.8%
|
$178,421,819
5,612,461 shares
|
$0 | 31 Mar 2026 |
| Legal & General Investment Management Ltd |
13D/G
Legal & General Group Plc
|
5.7%
|
$100,178,799
4,037,807 shares
|
$0 | 31 Dec 2023 |
| Legal & General Group Plc |
13F
13D/G
Company
|
5%
from 13D/G
|
$115,560,180
3,635,111 shares
|
— | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
5.9%
|
$135,390,833
4,258,974 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4.5%
|
$104,189,595
3,277,433 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4.2%
|
$96,814,856
3,045,450 shares
|
— | 31 Mar 2026 |
| LSV ASSET MANAGEMENT |
13F
Company
|
3.8%
|
$87,278,000
2,745,452 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$2,309,438.
Buys
$0
Insiders: 0
Sells
$2,309,438
Insiders: 6
Net
-$2,309,438
Shares: -77,598
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 77,598
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 18,985 | $0 | $755,494 | -$755,494 |
| 3-6 | 0 | 12,000 | $0 | $352,620 | -$352,620 |
| 6-9 | 0 | 25,113 | $0 | $701,146 | -$701,146 |
| 9-12 | 0 | 21,500 | $0 | $500,178 | -$500,178 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to NETSCOUT SYSTEMS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Anil K. Singhal
Net 12M change
-$2,309,438
Latest report
19 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Anil K. Singhal | President & CEO, Director | $64,847,965 | Mixed | 19 Jun 2026 | ||
| John Downing | EVP, World-Wide Sales | $6,719,504 | -$737,460 | -9.9% | Mixed | 19 Jun 2026 |
| Jean A. Bua | EVP, Chief Financial Officer and Treasurer | $5,090,249 | Mixed | 13 Feb 2025 | ||
| Michael Szabados | Director | $3,661,740 | -$475,360 | -11% | Mixed | 19 Jun 2026 |
| Joseph G. Hadzima Jr. | Director | $3,320,307 | -$156,891 | -4.5% | Mixed | 19 Nov 2025 |
| John R. Egan | Director | $2,413,545 | Mixed | 10 Sep 2025 | ||
| Robert E. Donahue | Director | $1,577,039 | Mixed | 10 Sep 2025 | ||
| Alfred Grasso | Director | $1,555,126 | -$470,583 | -23% | Mixed | 12 May 2026 |
| Christopher Perretta | Director | $1,276,332 | -$280,100 | -18% | Mixed | 12 Dec 2025 |
| Vivian M. Vitale | Director | $1,123,708 | Mixed | 10 Sep 2025 | ||
| Anthony John Piazza | EVP & Chief Financial Officer | $882,299 | Median | 15 Jun 2026 | ||
| Susan Louise Spradley | Director | $778,325 | Mixed | 25 Aug 2023 | ||
| Marlene Pelage | Director | $521,950 | Mixed | 10 Sep 2025 | ||
| Shannon Nash | Director | $521,950 | Mixed | 10 Sep 2025 | ||
| Sanjay Munshi | Chief Operating Officer | $286,046 | -$189,044 | -40% | Median | 15 Jun 2026 |
| Eric Todd Watt | Chief Accounting Officer | $68,170 | Mixed | 19 Jun 2026 |
Recent insider transactions for NETSCOUT SYSTEMS INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Eric Todd Watt | NTCT | Restricted Stock Unit | Award | 88.9% | 10,000 | 21,250 | 19 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Tax liability | -3.76% | -1,782 | 45,654 | 19 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Options Exercise | 14.6% | 6,048 | 47,436 | 19 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Performance Stock Unit | Options Exercise | -26.5% | -6,048 | 16,800 | 19 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Tax liability | -1% | -4,609 | 455,034 | 19 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Options Exercise | 2.31% | 10,368 | 459,643 | 19 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Performance Stock Unit | Options Exercise | -10.7% | -10,368 | 86,400 | 19 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Tax liability | -1.67% | -2,305 | 135,809 | 19 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Options Exercise | 3.9% | 5,184 | 138,114 | 19 Jun 2026 | Direct | ||
| John Downing | NTCT | Performance Stock Unit | Options Exercise | -10.7% | -5,184 | 43,200 | 19 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Tax liability | -4.29% | -1,856 | 41,388 | 15 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Options Exercise | 17% | 6,300 | 43,244 | 15 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Restricted Stock Unit | Options Exercise | -19% | -6,300 | 26,775 | 15 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Tax liability | -0.93% | -4,195 | 449,275 | 15 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Options Exercise | 2.44% | 10,800 | 453,470 | 15 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Restricted Stock Unit | Options Exercise | -8.16% | -10,800 | 121,500 | 15 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Common Stock | Tax liability | -6.1% | -585 | 8,998 | 15 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Common Stock | Options Exercise | 33.4% | 2,400 | 9,583 | 15 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Restricted Stock Unit | Options Exercise | -6.03% | -2,400 | 37,410 | 15 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Tax liability | -1.18% | -1,591 | 132,930 | 15 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Options Exercise | 4.18% | 5,400 | 134,521 | 15 Jun 2026 | Direct | ||
| John Downing | NTCT | Restricted Stock Unit | Options Exercise | -8.16% | -5,400 | 60,750 | 15 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Common Stock | Tax liability | -2.08% | -589 | 27,754 | 15 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Common Stock | Options Exercise | 7.59% | 2,000 | 28,343 | 15 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Restricted Stock Unit | Options Exercise | -4.67% | -2,000 | 40,800 | 15 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Sale | -5.83% | $322,320 | $40.29 | -8,000 | 129,121 | 08 Jun 2026 | Direct |
| Michael Szabados | NTCT | Common Stock | Tax liability | -4.77% | -1,850 | 36,944 | 06 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Options Exercise | 19.4% | 6,300 | 38,794 | 06 Jun 2026 | Direct | ||
| Michael Szabados | NTCT | Restricted Stock Unit | Options Exercise | -16% | -6,300 | 33,075 | 06 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Tax liability | -0.71% | -3,170 | 442,670 | 06 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Common Stock | Options Exercise | 2.48% | 10,800 | 445,840 | 06 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Restricted Stock Unit | Options Exercise | -7.55% | -10,800 | 132,300 | 06 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Common Stock | Tax liability | -2.61% | -705 | 26,343 | 06 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Common Stock | Options Exercise | 9.74% | 2,400 | 27,048 | 06 Jun 2026 | Direct | ||
| Anthony John Piazza | NTCT | Restricted Stock Unit | Options Exercise | -5.31% | -2,400 | 42,800 | 06 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Common Stock | Tax liability | -8.9% | -702 | 7,183 | 06 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Common Stock | Options Exercise | 57.5% | 2,880 | 7,885 | 06 Jun 2026 | Direct | ||
| Sanjay Munshi | NTCT | Restricted Stock Unit | Options Exercise | -6.75% | -2,880 | 39,810 | 06 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Tax liability | -1.14% | -1,585 | 137,121 | 06 Jun 2026 | Direct | ||
| John Downing | NTCT | Common Stock | Options Exercise | 4.05% | 5,400 | 138,706 | 06 Jun 2026 | Direct | ||
| John Downing | NTCT | Restricted Stock Unit | Options Exercise | -7.55% | -5,400 | 66,150 | 06 Jun 2026 | Direct | ||
| Anil K. Singhal | NTCT | Performance Stock Unit | Award | 33.3% | 28,800 | 115,200 | 28 May 2026 | Direct | ||
| Anil K. Singhal | NTCT | Restricted Stock Unit | Award | 43.2% | 43,200 | 143,100 | 28 May 2026 | Direct | ||
| Anthony John Piazza | NTCT | Performance Stock Unit | Award | 100% | 12,000 | 24,000 | 28 May 2026 | Direct | ||
| Anthony John Piazza | NTCT | Restricted Stock Unit | Award | 66.2% | 18,000 | 45,200 | 28 May 2026 | Direct | ||
| Sanjay Munshi | NTCT | Performance Stock Unit | Award | 100% | 10,000 | 20,000 | 28 May 2026 | Direct | ||
| Sanjay Munshi | NTCT | Restricted Stock Unit | Award | 54.2% | 15,000 | 42,690 | 28 May 2026 | Direct | ||
| John Downing | NTCT | Performance Stock Unit | Award | 33.3% | 14,400 | 57,600 | 28 May 2026 | Direct | ||
| John Downing | NTCT | Restricted Stock Unit | Award | 43.2% | 21,600 | 71,550 | 28 May 2026 | Direct | ||
| Michael Szabados | NTCT | Common Stock | Sale | -11% | $153,600 | $38.40 | -4,000 | 32,494 | 15 May 2026 | Direct |
* marks a reported price that did not pass the local price check.