WESTFORD, MA
NETSCOUT SYSTEMS INCNTCT— Latest position per institution from SEC 13F filings
15
Institutional holders
70.01M
Total shares held
2.40B
Estimated value
3.50M
Avg. position size
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
11.77M
Value
215.20M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
11.44M
Value
498.03M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
9.06M
Value
245.09M
Filed
Dec 31, 2025
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
5.59M
Value
243.48M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
4.33M
Value
188.48M
Filed
Jun 30, 2026
LEGAL & GENERAL GROUP PLC
CIK 764068
Shares
3.81M
Value
165.97M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
3.58M
Value
155.88M
Filed
Jun 30, 2026
LSV ASSET MANAGEMENT
CIK 1050470
Shares
3.16M
Value
137.69K
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
3.06M
Value
133.05M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.15M
Value
93.79M
Filed
Jun 30, 2026
FIRST TRUST ADVISORS LP
CIK 1125816
Shares
1.96M
Value
85.48M
Filed
Jun 30, 2026
ROBECO INSTITUTIONAL ASSET MANAGEMENT B.V.
CIK 1418773
Shares
1.86M
Value
74.72M
Filed
Sep 30, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.26M
Value
54.81M
Filed
Jun 30, 2026
ALLIANZ ASSET MANAGEMENT GMBH
CIK 1535323
Shares
1.25M
Value
54.57M
Filed
Jun 30, 2026
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
CIK 1644956
Shares
1.12M
Value
20.52M
Filed
Jun 30, 2024
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
1.06M
Value
45.85M
Filed
Jun 30, 2026
AMERIPRISE FINANCIAL INC
CIK 820027
Shares
1.01M
Value
43.78M
Filed
Jun 30, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 884546
Shares
1M
Value
43.70M
Filed
Jun 30, 2026
NORTHERN TRUST CORP
CIK 73124
Shares
783.28K
Value
34.11M
Filed
Jun 30, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
768.07K
Value
33.44K
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK FINANCE, INC. | 1364742 | 11.77M | 215.20M | Jun 30, 2024 |
| 2 | BLACKROCK, INC. | 2012383 | 11.44M | 498.03M | Jun 30, 2026 |
| 3 | VANGUARD GROUP INC | 102909 | 9.06M | 245.09M | Dec 31, 2025 |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 5.59M | 243.48M | Jun 30, 2026 |
| 5 | DIMENSIONAL FUND ADVISORS LP | 354204 | 4.33M | 188.48M | Jun 30, 2026 |
| 6 | LEGAL & GENERAL GROUP PLC | 764068 | 3.81M | 165.97M | Jun 30, 2026 |
| 7 | STATE STREET CORP | 93751 | 3.58M | 155.88M | Jun 30, 2026 |
| 8 | LSV ASSET MANAGEMENT | 1050470 | 3.16M | 137.69K | Jun 30, 2026 |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 3.06M | 133.05M | Jun 30, 2026 |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.15M | 93.79M | Jun 30, 2026 |
| 11 | FIRST TRUST ADVISORS LP | 1125816 | 1.96M | 85.48M | Jun 30, 2026 |
| 12 | ROBECO INSTITUTIONAL ASSET MANAGEMENT B.V. | 1418773 | 1.86M | 74.72M | Sep 30, 2026 |
| 13 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.26M | 54.81M | Jun 30, 2026 |
| 14 | ALLIANZ ASSET MANAGEMENT GMBH | 1535323 | 1.25M | 54.57M | Jun 30, 2026 |
| 15 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1644956 | 1.12M | 20.52M | Jun 30, 2024 |
| 16 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 1.06M | 45.85M | Jun 30, 2026 |
| 17 | AMERIPRISE FINANCIAL INC | 820027 | 1.01M | 43.78M | Jun 30, 2026 |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 884546 | 1M | 43.70M | Jun 30, 2026 |
| 19 | NORTHERN TRUST CORP | 73124 | 783.28K | 34.11M | Jun 30, 2026 |
| 20 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 768.07K | 33.44K | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.