NetScout Systems, Inc.
US ˙ NasdaqGS ˙ US64115T1043

SecurityNTCT / NetScout Systems, Inc.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership104,342 shares
Latest Disclosed Value $ 3,317,032
D. E. Shaw & Co., Inc. reports 44.52% decrease in ownership of NTCT / NetScout Systems, Inc.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 104,342 shares of NetScout Systems, Inc. (US:NTCT) valued at $3,317,032 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 188,085 shares of NetScout Systems, Inc.. This represents a change in shares of -44.52% during the quarter. The current value of the position is $4,413,667 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 104,342 -83,743 -44.52 3,317 -34.82 0.0020
2026-02-17 2025-12-31 13F NETSCOUT SYS COM 64115T104 188,085 -198,050 -51.29 5,090 -48.97 0.0028
2025-11-14 2025-09-30 13F NETSCOUT SYS COM 64115T104 386,135 -236,309 -37.96 9,974 -35.42 0.0056
2025-08-14 2025-06-30 13F NETSCOUT SYS COM 64115T104 622,444 -356,677 -36.43 15,443 -24.93 0.0109
2025-05-15 2025-03-31 13F NETSCOUT SYS COM 64115T104 979,121 -34,089 -3.36 20,571 -6.27 0.0183
2025-02-14 2024-12-31 13F NETSCOUT SYS COM 64115T104 1,013,210 -186,349 -15.53 21,946 -15.88 0.0161
2024-11-14 2024-09-30 13F NETSCOUT SYS COM 64115T104 1,199,559 -76,167 -5.97 26,090 11.82 0.0224
2024-08-14 2024-06-30 13F NETSCOUT SYS COM 64115T104 1,275,726 35,811 2.89 23,333 -13.83 0.0218
2024-05-15 2024-03-31 13F NETSCOUT SYS COM 64115T104 1,239,915 -325,569 -20.80 27,080 -21.19 0.0232
2024-02-14 2023-12-31 13F NETSCOUT SYS COM 64115T104 1,565,484 321,802 25.87 34,362 -1.39 0.0300
2023-11-14 2023-09-30 13F NETSCOUT SYS COM 64115T104 1,243,682 288,605 30.22 34,848 17.89 0.0364
2023-08-14 2023-06-30 13F NETSCOUT SYS COM 64115T104 955,077 90,469 10.46 29,560 19.33 0.0302
2023-05-15 2023-03-31 13F NETSCOUT SYS COM 64115T104 864,608 199,511 30.00 24,771 14.56 0.0265
2023-02-14 2022-12-31 13F NETSCOUT SYS COM 64115T104 665,097 200,210 43.07 21,622 48.50 0.0239
2022-11-14 2022-09-30 13F NETSCOUT SYS COM 64115T104 464,887 26,683 6.09 14,560 -1.84 0.0174
2022-08-15 2022-06-30 13F NETSCOUT SYS COM 64115T104 438,204 -255,089 -36.79 14,833 -33.31 0.0174
2022-05-16 2022-03-31 13F NETSCOUT SYS COM 64115T104 693,293 -196,231 -22.06 22,241 -24.42 0.0208
2022-02-14 2021-12-31 13F NETSCOUT SYS COM 64115T104 889,524 35,623 4.17 29,426 27.87 0.0244
2021-11-15 2021-09-30 13F NETSCOUT SYS COM 64115T104 853,901 41,678 5.13 23,013 -0.72 0.0208
2021-08-16 2021-06-30 13F NETSCOUT SYS COM 64115T104 812,223 -166,047 -16.97 23,181 -15.85 0.0200
2021-05-17 2021-03-31 13F NETSCOUT SYS COM 64115T104 978,270 -102,071 -9.45 27,548 -7.00 0.0266
2021-02-16 2020-12-31 13F NETSCOUT SYS COM 64115T104 1,080,341 -116,034 -9.70 29,623 13.42 0.0265
2020-11-16 2020-09-30 13F NETSCOUT SYS COM 64115T104 1,196,375 140,962 13.36 26,117 -3.18 0.0267
2020-08-14 2020-06-30 13F NETSCOUT SYS COM 64115T104 1,055,413 -28,773 -2.65 26,976 5.12 0.0321
2020-05-15 2020-03-31 13F NETSCOUT SYS COM 64115T104 1,084,186 -128,689 -10.61 25,663 -12.09 0.0400
2020-02-14 2019-12-31 13F NETSCOUT SYS COM 64115T104 1,212,875 285,175 30.74 29,194 36.47 0.0334
2019-11-14 2019-09-30 13F NETSCOUT SYS COM 64115T104 927,700 78,528 9.25 21,393 -0.78 0.0263
2019-08-14 2019-06-30 13F NETSCOUT SYS COM 64115T104 849,172 185,984 28.04 21,561 15.83 0.0269
2019-05-15 2019-03-31 13F NETSCOUT SYS COM 64115T104 663,188 39,168 6.28 18,615 26.25 0.0241
2019-02-14 2018-12-31 13F NETSCOUT SYS COM 64115T104 624,020 22,928 3.81 14,745 -2.85 0.0203
2018-11-14 2018-09-30 13F NETSCOUT SYS COM 64115T104 601,092 -3,817 -0.63 15,177 -15.52 0.0182
2018-08-14 2018-06-30 13F NETSCOUT SYS COM 64115T104 604,909 212,546 54.17 17,966 73.77 0.0234
2018-05-15 2018-03-31 13F NETSCOUT SYS COM 64115T104 392,363 292,305 292.14 10,339 239.32 0.0141
2018-02-14 2017-12-31 13F NETSCOUT SYS COM 64115T104 100,058 -98,827 -49.69 3,047 -52.64 0.0042
2017-11-14 2017-09-30 13F NETSCOUT SYS COM 64115T104 198,885 129,036 184.74 6,434 167.75 0.0099
2017-08-14 2017-06-30 13F NETSCOUT SYS COM 64115T104 69,849 18,405 35.78 2,403 23.10 0.0040
2017-05-15 2017-03-31 13F NETSCOUT SYS COM 64115T104 51,444 39,022 314.14 1,952 399.23 0.0034
2017-02-14 2016-12-31 13F NETSCOUT SYS COM 64115T104 12,422 -17,291 -58.19 391 -55.01 0.0007
2016-11-14 2016-09-30 13F NETSCOUT SYS COM 64115T104 29,713 -53,848 -64.44 869 -53.28 0.0015
2016-08-15 2016-06-30 13F NETSCOUT SYS COM 64115T104 83,561 -131,351 -61.12 1,860 -62.32 0.0034
2016-05-16 2016-03-31 13F NETSCOUT SYS COM 64115T104 214,912 205,737 2,242.37 4,936 1,650.35 0.0089
2016-02-16 2015-12-31 13F NETSCOUT SYS COM 64115T104 9,175 9,175 0.00 282 0.0004
2015-11-16 2015-09-30 13F NETSCOUT SYS COM 64115T104 0 -11,236 -100.00 0 -100.00
2015-08-14 2015-06-30 13F NETSCOUT SYS COM 64115T104 11,236 6,624 143.63 412 103.96 0.0006
2015-05-15 2015-03-31 13F NETSCOUT SYS COM 64115T104 4,612 -17,574 -79.21 202 -75.09 0.0003
2015-02-17 2014-12-31 13F NETSCOUT SYS COM 64115T104 22,186 -113,843 -83.69 811 -86.98 0.0010
2014-11-14 2014-09-30 13F NETSCOUT SYS COM 64115T104 136,029 10,347 8.23 6,230 11.81 0.0081
2014-08-14 2014-06-30 13F NETSCOUT SYS COM 64115T104 125,682 28,874 29.83 5,572 53.16 0.0076
2014-05-15 2014-03-31 13F NETSCOUT SYS COM 64115T104 96,808 18,639 23.84 3,638 57.28 0.0052
2014-02-14 2013-12-31 13F NETSCOUT SYS COM 64115T104 78,169 -15,530 -16.57 2,313 -3.42 0.0032
2013-11-20 2013-09-30 13F/A-1 NETSCOUT SYS COM 64115T104 93,699 62,117 196.68 2,395 224.97 0.0038
2013-11-14 2013-09-30 13F NETSCOUT SYS COM 64115T104 93,699 2,395
2013-08-14 2013-06-30 13F NETSCOUT SYS COM 64115T104 31,582 31,582 737 0.0014
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.