NETSCOUT SYSTEMS INC (NTCT) Top Institutional Shareholders
NETSCOUT SYSTEMS INC (NTCT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $1.94B in NTCT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of NTCT tracked by InsiderSet, reporting ownership valued at approximately $362.06M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $446.68M, representing an estimated gain of +23.37% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% of the total disclosed NTCT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Dimensional Fund Advisors Lp, and several other long-term asset managers with concentrated positions in NETSCOUT SYSTEMS INC (NTCT).
This page ranks the largest institutional NTCT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
279
Total Reported Value
$1.94B
Largest Holder
Blackrock, Inc.
Largest Position
$362.06M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
113
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 11,388,987 | $362,055,915 | $446,676,070 | +$84,620,155 | +23.37% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,528,844 | $175,761,951 | $216,841,262 | +$41,079,311 | +23.37% | |
| Dimensional Fund Advisors Lp | 0.03% | 4,258,974 | $135,390,833 | $167,036,960 | +$31,646,127 | +23.37% | |
| Legal & General Group Plc | 0.03% | 3,635,111 | $115,560,180 | $142,569,053 | +$27,008,873 | +23.37% | |
| State Street Corp | 0.00% | 3,277,433 | $104,189,595 | $128,540,922 | +$24,351,327 | +23.37% | |
| Vanguard Capital Management Llc | 0.00% | 3,045,450 | $96,814,856 | $119,442,549 | +$22,627,693 | +23.37% | |
| Robeco Institutional Asset Management B.V. | 0.09% | 2,011,528 | $63,946,476 | $78,892,128 | +$14,945,652 | +23.37% | |
| Geode Capital Management, Llc | 0.00% | 1,834,463 | $58,326,338 | $71,947,639 | +$13,621,301 | +23.35% | |
| First Trust Advisors Lp | 0.04% | 1,744,535 | $55,458,767 | $68,420,663 | +$12,961,896 | +23.37% | |
| Aqr Capital Management Llc | 0.02% | 1,200,146 | $37,756,593 | $47,069,726 | +$9,313,133 | +24.67% | |
| Allianz Asset Management Gmbh | 0.04% | 1,185,077 | $37,673,598 | $46,478,720 | +$8,805,122 | +23.37% | |
| Wellington Management Group Llp | 0.01% | 1,077,196 | $34,244,061 | $42,247,627 | +$8,003,566 | +23.37% | |
| Charles Schwab Investment Management Inc | 0.01% | 1,058,362 | $33,645,328 | $41,508,958 | +$7,863,630 | +23.37% | |
| Northern Trust Corp | 0.00% | 737,769 | $23,453,677 | $28,935,300 | +$5,481,623 | +23.37% | |
| Morgan Stanley | 0.00% | 714,445 | $22,712,219 | $28,020,533 | +$5,308,314 | +23.37% | |
| Bridgeway Capital Management, Llc | 0.41% | 634,039 | $20,156,100 | $24,867,010 | +$4,710,910 | +23.37% | |
| Lazard Asset Management Llc | 0.03% | 585,039 | $18,598,390 | $22,945,230 | +$4,346,840 | +23.37% | |
| Barclays Plc | 0.01% | 561,229 | $17,841,470 | $22,011,401 | +$4,169,931 | +23.37% | |
| Nuveen, Llc | 0.00% | 561,208 | $17,840,802 | $22,010,578 | +$4,169,776 | +23.37% | |
| Ameriprise Financial Inc | 0.00% | 548,777 | $17,445,623 | $21,523,034 | +$4,077,411 | +23.37% | |
| Impax Asset Management Group Plc | 0.12% | 522,000 | $16,594,380 | $20,472,840 | +$3,878,460 | +23.37% | |
| Invesco Ltd. | 0.00% | 452,913 | $14,398,104 | $17,763,248 | +$3,365,144 | +23.37% | |
| Bank Of New York Mellon Corp | 0.00% | 449,331 | $14,284,233 | $17,622,762 | +$3,338,529 | +23.37% | |
| Seb Asset Management Ab | 0.06% | 444,688 | $14,136,614 | $17,440,663 | +$3,304,049 | +23.37% | |
| Vanguard Fiduciary Trust Co | 0.00% | 443,219 | $14,089,932 | $17,383,049 | +$3,293,117 | +23.37% | |
| Two Sigma Investments, Lp | 0.01% | 436,607 | $13,879,737 | $17,123,727 | +$3,243,990 | +23.37% | |
| Victory Capital Management Inc | 0.01% | 436,295 | $13,869,818 | $17,111,490 | +$3,241,672 | +23.37% | |
| Jupiter Asset Management Ltd | 0.07% | 421,435 | $13,397,419 | $16,528,681 | +$3,131,262 | +23.37% | |
| Deutsche Bank Ag\ | 0.00% | 406,293 | $12,916,055 | $15,934,811 | +$3,018,756 | +23.37% | |
| Principal Financial Group Inc | 0.01% | 401,707 | $12,770,265 | $15,754,949 | +$2,984,684 | +23.37% | |
| Goldman Sachs Group Inc | 0.00% | 400,240 | $12,723,630 | $15,697,413 | +$2,973,783 | +23.37% | |
| Empowered Funds, Llc | 0.08% | 390,523 | $12,414,726 | $15,316,312 | +$2,901,586 | +23.37% | |
| Fmr Llc | 0.00% | 323,370 | $10,279,941 | $12,682,571 | +$2,402,630 | +23.37% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 322,756 | $10,260,413 | $12,658,490 | +$2,398,077 | +23.37% | |
| Public Sector Pension Investment Board | 0.03% | 301,405 | $9,581,665 | $11,821,104 | +$2,239,439 | +23.37% | |
| Qube Research & Technologies Ltd | 0.01% | 296,024 | $9,410,603 | $11,610,061 | +$2,199,458 | +23.37% | |
| Defiance Etfs, Llc | 0.13% | 293,218 | $9,321,400 | $11,500,010 | +$2,178,610 | +23.37% | |
| Alyeska Investment Group, L.P. | 0.03% | 290,606 | $9,238,365 | $11,397,567 | +$2,159,202 | +23.37% | |
| Allspring Global Investments Holdings, Llc | 0.02% | 283,946 | $9,174,295 | $11,136,362 | +$1,962,067 | +21.39% | |
| Ubs Group Ag | 0.00% | 285,344 | $9,071,085 | $11,191,192 | +$2,120,107 | +23.37% | |
| Hillsdale Investment Management Inc. | 0.24% | 280,495 | $8,916,936 | $11,001,014 | +$2,084,078 | +23.37% | |
| Sei Investments Co | 0.01% | 225,479 | $7,167,865 | $8,843,286 | +$1,675,421 | +23.37% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.01% | 222,647 | $7,077,948 | $8,732,215 | +$1,654,267 | +23.37% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.01% | 200,002 | $6,358,064 | $7,844,078 | +$1,486,014 | +23.37% |
| Rhumbline Advisers | 0.01% | 196,536 | $6,247,856 | $7,708,142 | +$1,460,286 | +23.37% | |
| American Century Companies Inc | 0.00% | 188,206 | $5,983,069 | $7,381,439 | +$1,398,370 | +23.37% | |
| Bridgewater Associates, Lp | 0.03% | 187,312 | $5,954,648 | $7,346,377 | +$1,391,729 | +23.37% | |
| Leuthold Group, Llc | 0.62% | 182,878 | $5,813,692 | $7,172,475 | +$1,358,783 | +23.37% | |
| Edgestream Partners, L.P. | 0.18% | 171,391 | $5,448,520 | $6,721,955 | +$1,273,435 | +23.37% | |
| Russell Investments Group, Ltd. | 0.01% | 166,104 | $5,280,452 | $6,514,599 | +$1,234,147 | +23.37% |
Frequently asked questions about NTCT
Who owns the most NTCT stock?
The largest holders of NTCT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for NETSCOUT SYSTEMS INC (NTCT).
Is NTCT widely held by superinvestors?
Many widely followed stocks like NTCT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly NTCT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.