Keysight Technologies, Inc.
MX ˙ BMV ˙ US49338L1035
SecurityMX:KEYS / Keysight Technologies, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership413,342 shares
Latest Disclosed Value $ 116,715,376
Marshall Wace, Llp ownership in KEYS / Keysight Technologies, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 413,342 shares of Keysight Technologies, Inc. (MX:KEYS) valued at $116,715,376 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 0 shares of Keysight Technologies, Inc..

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)
2026-05-14 2026-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 413,342 413,342 116,715 0.1162
2026-02-13 2025-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -37,729 -100.00 0 -100.00
2025-11-13 2025-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 37,729 -373,173 -90.82 6,600 -90.20 0.0067
2025-08-13 2025-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 410,902 -39,564 -8.78 67,330 -0.20 0.0758
2025-05-15 2025-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 450,466 -100,915 -18.30 67,466 -23.83 0.0857
2025-02-13 2024-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 551,381 233,461 73.43 88,568 75.29 0.1065
2024-11-14 2024-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 317,920 229,600 259.96 50,527 318.37 0.0615
2024-08-14 2024-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 88,320 -69,680 -44.10 12,078 -51.12 0.0161
2024-05-15 2024-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 158,000 -27,428 -14.79 24,708 -16.24 0.0376
2024-02-14 2023-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 185,428 -74,548 -28.67 29,500 -14.24 0.0500
2023-11-14 2023-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 259,976 259,976 34,397 0.0697
2023-08-14 2023-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -18,690 -100.00 0 -100.00
2023-05-15 2023-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 18,690 18,690 3,018 0.0064
2023-02-14 2022-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -173,293 -100.00 0 -100.00
2022-11-14 2022-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 173,293 -57,667 -24.97 27,269 -14.35 0.0598
2022-08-15 2022-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 230,960 -258,879 -52.85 31,838 -58.86 0.0655
2022-05-16 2022-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 489,839 190,304 63.53 77,381 25.10 0.1465
2022-02-14 2021-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 299,535 277,954 1,287.96 61,855 1,644.85 0.1142
2021-11-15 2021-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 21,581 -62,585 -74.36 3,545 -72.72 0.0147
2021-08-13 2021-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 84,166 78,811 1,471.73 12,996 1,592.19 0.0633
2021-05-17 2021-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 5,355 5,355 -93.64 768 -94.09 0.0035
2021-02-16 2020-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -58,986 -100.00 0 -100.00
2020-11-16 2020-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 58,986 -528,826 -89.97 5,827 -90.16 0.0373
2020-08-13 2020-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 587,812 384,880 189.66 59,239 248.83 0.4150
2020-05-15 2020-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 202,932 -634,398 -75.76 16,982 -80.24 0.1696
2020-02-14 2019-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 837,330 114,917 15.91 85,935 22.32 0.5906
2019-11-14 2019-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 722,413 219,492 43.64 70,255 55.54 0.5523
2019-08-14 2019-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 502,921 498,158 10,458.91 45,167 10,783.61 0.3716
2019-05-29 2019-03-31 13F/A-1 KEYSIGHT TEC COMMON STOCK 49338L103 4,763 4,763 -99.05 415 -99.08 0.0039
2019-05-14 2019-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 4,763 4,763 415
2019-02-14 2018-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -99,502 -100.00 0 -100.00
2018-12-06 2018-09-30 13F/A-1 KEYSIGHT TEC COMMON STOCK 49338L103 99,502 99,502 6,595 0.0561
2018-11-14 2018-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 99,502 99,502 6,595
2018-05-15 2018-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -64,701 -100.00 0 -100.00
2018-03-29 2017-12-31 13F/A-1 KEYSIGHT TEC COMMON STOCK 49338L103 64,701 -21,430 -24.88 2,692 -25.59 0.1131
2018-02-14 2017-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 64,701 -21,430 2,692
2017-11-13 2017-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 86,131 51,713 150.25 3,618 169.60 0.1682
2017-08-04 2017-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 34,418 -12,300 -26.33 1,342 -20.21 0.0591
2017-05-12 2017-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 46,718 -1,307,916 -96.55 1,682 -96.60 0.0812
2017-02-10 2016-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 1,354,634 971,618 253.68 49,539 308.13 0.3257
2016-11-10 2016-09-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 383,016 383,016 -71.73 12,138 -75.50 0.0863
2016-05-13 2016-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -9,022 -100.00 0 -100.00
2016-02-10 2015-12-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 9,022 9,022 0.00 256 0.0024
2015-08-14 2015-06-30 13F KEYSIGHT TEC COMMON STOCK 49338L103 0 -228,686 -100.00 0 -100.00
2015-05-11 2015-03-31 13F KEYSIGHT TEC COMMON STOCK 49338L103 228,686 228,686 8,496 0.1107
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.