NetScout Systems, Inc.
US ˙ NasdaqGS ˙ US64115T1043

SecurityNTCT / NetScout Systems, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership323,370 shares
Latest Disclosed Value $ 10,279,941
Fmr Llc reports 4.30% decrease in ownership of NTCT / NetScout Systems, Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 323,370 shares of NetScout Systems, Inc. (US:NTCT) valued at $10,279,932 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 337,913 shares of NetScout Systems, Inc.. This represents a change in shares of -4.30% during the quarter. The current value of the position is $13,125,588 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F NETSCOUT SYS COM 64115T104 323,370 -14,543 -4.30 10,280 12.42 0.0001
2026-02-17 2025-12-31 13F NETSCOUT SYS COM 64115T104 337,913 69,875 26.07 9,144 32.07 0.0005
2025-11-13 2025-09-30 13F NETSCOUT SYS COM 64115T104 268,038 30,330 12.76 6,923 17.40 0.0004
2025-08-14 2025-06-30 13F NETSCOUT SYS COM 64115T104 237,708 11,468 5.07 5,898 24.07 0.0003
2025-05-12 2025-03-31 13F NETSCOUT SYS COM 64115T104 226,240 117,905 108.83 4,753 102.60 0.0003
2025-02-13 2024-12-31 13F NETSCOUT SYS COM 64115T104 108,335 106,371 5,416.04 2,347 5,485.71 0.0001
2024-11-13 2024-09-30 13F NETSCOUT SYS COM 64115T104 1,964 477 32.08 43 55.56 0.0000
2024-08-13 2024-06-30 13F NETSCOUT SYS COM 64115T104 1,487 -436 -22.67 27 -34.15 0.0000
2024-05-13 2024-03-31 13F NETSCOUT SYS COM 64115T104 1,923 279 16.97 42 13.89 0.0000
2024-02-13 2023-12-31 13F NETSCOUT SYS COM 64115T104 1,644 -440 -21.11 36 -37.93 0.0000
2023-11-13 2023-09-30 13F NETSCOUT SYS COM 64115T104 2,084 -1,037 -33.23 58 -39.58 0.0000
2023-08-11 2023-06-30 13F NETSCOUT SYS COM 64115T104 3,121 -462,786 -99.33 97 -99.28 0.0000
2023-08-11 2023-03-31 13F/A-1 NETSCOUT SYS COM 64115T104 465,907 6,361 1.38 13,348 -10.65 0.0012
2023-05-11 2023-03-31 13F NETSCOUT SYS COM 64115T104 465,907 6,361 13,348 0.0002
2023-02-13 2022-12-31 13F NETSCOUT SYS COM 64115T104 459,546 3,240 0.71 14,940 4.53 0.0015
2022-11-10 2022-09-30 13F NETSCOUT SYS COM 64115T104 456,306 -173,416 -27.54 14,292 -32.95 0.0015
2022-08-12 2022-06-30 13F NETSCOUT SYS COM 64115T104 629,722 588,337 1,421.62 21,316 1,506.33 0.0021
2022-05-13 2022-03-31 13F NETSCOUT SYS COM 64115T104 41,385 41,159 18,211.95 1,327 18,857.14 0.0001
2022-02-14 2021-12-31 13F NETSCOUT SYS COM 64115T104 226 -117,459 -99.81 7 -99.78 0.0000
2022-02-14 2021-09-30 13F/A-1 NETSCOUT SYS COM 64115T104 117,685 -14,075 -10.68 3,172 -15.64 0.0003
2021-11-15 2021-09-30 13F NETSCOUT SYS COM 64115T104 117,685 -14,075 3,172 0.0000
2021-08-13 2021-06-30 13F NETSCOUT SYS COM 64115T104 131,760 -4,628 -3.39 3,760 -2.08 0.0003
2021-05-14 2021-03-31 13F NETSCOUT SYS COM 64115T104 136,388 748 0.55 3,840 3.25 0.0003
2021-02-08 2020-12-31 13F NETSCOUT SYS COM 64115T104 135,640 -3,098 -2.23 3,719 22.82 0.0003
2020-11-13 2020-09-30 13F NETSCOUT SYS COM 64115T104 138,738 -3,675 -2.58 3,028 -16.81 0.0003
2020-08-24 2020-06-30 13F/A-1 NETSCOUT SYS COM 64115T104 142,413 67,788 90.84 3,640 106.12 0.0004
2020-08-13 2020-06-30 13F NETSCOUT SYS COM 64115T104 142,413 67,788 3,640 89.4241
2020-05-14 2020-03-31 13F NETSCOUT SYS COM 64115T104 74,625 -2,941 -3.79 1,766 -5.41 0.0002
2020-02-07 2019-12-31 13F NETSCOUT SYS COM 64115T104 77,566 -11,106 -12.52 1,867 -8.70 0.0002
2019-11-13 2019-09-30 13F NETSCOUT SYS COM 64115T104 88,672 -38,518 -30.28 2,045 -36.69 0.0002
2019-08-13 2019-06-30 13F NETSCOUT SYS COM 64115T104 127,190 27,200 27.20 3,230 15.07 0.0004
2019-05-13 2019-03-31 13F NETSCOUT SYS COM 64115T104 99,990 -2,281 -2.23 2,807 16.14 0.0003
2019-02-13 2018-12-31 13F NETSCOUT SYS COM 64115T104 102,271 9,564 10.32 2,417 3.25 0.0003
2018-11-09 2018-09-30 13F NETSCOUT SYS COM 64115T104 92,707 4,347 4.92 2,341 -10.79 0.0003
2018-08-10 2018-06-30 13F NETSCOUT SYS COM 64115T104 88,360 -9,790 -9.97 2,624 1.47 0.0003
2018-05-14 2018-03-31 13F NETSCOUT SYS COM 64115T104 98,150 16,590 20.34 2,586 4.11 0.0003
2018-02-12 2017-12-31 13F NETSCOUT SYS COM 64115T104 81,560 20,230 32.99 2,484 25.20 0.0003
2017-11-13 2017-09-30 13F NETSCOUT SYS COM 64115T104 61,330 -3,810 -5.85 1,984 -11.47 0.0002
2017-08-29 2017-06-30 13F/A-1 NETSCOUT SYS COM 64115T104 65,140 -12,070 -15.63 2,241 -23.52 0.0003
2017-08-11 2017-06-30 13F NETSCOUT SYS COM 64115T104 65,140 -12,070 2,241
2017-05-11 2017-03-31 13F NETSCOUT SYS COM 64115T104 77,210 -140,207 -64.49 2,930 -57.22 0.0004
2017-02-10 2016-12-31 13F NETSCOUT SYS COM 64115T104 217,417 -53,200 -19.66 6,849 -13.48 0.0009
2016-11-14 2016-09-30 13F NETSCOUT SYS COM 64115T104 270,617 317 0.12 7,916 31.63 0.0011
2016-08-11 2016-06-30 13F NETSCOUT SYS COM 64115T104 270,300 2,900 1.08 6,014 -2.08 0.0008
2016-05-16 2016-03-31 13F NETSCOUT SYS COM 64115T104 267,400 267,400 6,142 0.0008
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.