Keysight Technologies, Inc.
US ˙ NYSE ˙ US49338L1035

SecurityKEYS / Keysight Technologies, Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership186,192 shares
Latest Disclosed Value $ 52,575,035
First Manhattan Co reports 35.43% decrease in ownership of KEYS / Keysight Technologies, Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 186,192 shares of Keysight Technologies, Inc. (US:KEYS) valued at $52,575,035 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 288,337 shares of Keysight Technologies, Inc.. This represents a change in shares of -35.43% during the quarter. The current value of the position is $65,256,572 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 KEYSIGHT TECHNOLOGIES COM 49338L103 186,192 -102,145 -35.43 52,575 -10.26 0.1458
2026-02-17 2025-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 288,337 -29,815 -9.37 58,587 5.28 0.1538
2025-11-14 2025-09-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 318,152 -163,570 -33.96 55,651 -29.50 0.1470
2025-08-14 2025-06-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 481,722 -88,926 -15.58 78,935 -7.64 0.2229
2025-05-15 2025-03-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 570,648 -326,651 -36.40 85,466 -40.70 0.2493
2025-02-14 2024-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 897,299 -31,778 -3.42 144,133 -2.39 0.4227
2024-11-14 2024-09-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 929,077 -323,312 -25.82 147,658 -14.54 0.4378
2024-08-15 2024-06-30 13F/A-1 KEYSIGHT TECHNOLOGIES COM 49338L103 1,252,389 -24,973 -1.96 172,782 -13.50 0.5540
2024-08-14 2024-06-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,252,389 -24,973 172,782 0.5541
2024-05-15 2024-03-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,277,362 -40,849 -3.10 199,754 -3.44 0.6472
2024-02-13 2023-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,318,211 -9,425 -0.71 206,875 18.41 0.7177
2023-11-14 2023-09-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,327,636 301,767 29.42 174,705 3.38 0.6450
2023-08-14 2023-06-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,025,869 6,926 0.68 169,002 4.02 0.6191
2023-05-15 2023-03-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,018,943 -257,471 -20.17 162,468 -24.76 0.6231
2023-02-14 2022-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,276,414 -89,684 -6.56 215,947 1.85 0.7914
2022-11-14 2022-09-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,366,098 5,128 0.38 212,014 14.67 0.8978
2022-08-15 2022-06-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,360,970 8,438 0.62 184,893 -13.46 0.7452
2022-05-16 2022-03-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,352,532 -17,520 -1.28 213,659 -24.48 0.6989
2022-02-14 2021-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,370,052 -15,213 -1.10 282,929 24.32 0.9324
2021-11-15 2021-09-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,385,265 -8,072 -0.58 227,585 5.78 0.8384
2021-08-16 2021-06-30 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,393,337 -2,629 -0.19 215,145 7.48 0.7854
2021-05-14 2021-03-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,395,966 -5,004 -0.36 200,181 8.17 0.8629
2021-02-16 2020-12-31 13F KEYSIGHT TECHNOLOGIES COM 49338L103 1,400,970 238,662 20.53 185,054 61.18 0.8857
2020-11-12 2020-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,162,308 635,010 120.43 114,812 116.05 0.5916
2020-08-14 2020-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 527,298 142,610 37.07 53,141 65.09 0.3071
2020-05-06 2020-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 384,688 383,002 22,716.61 32,190 18,506.94 0.2086
2020-02-13 2019-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,686 0 0.00 173 6.13 0.0009
2019-11-13 2019-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,686 83 5.18 163 13.99 0.0009
2019-08-16 2019-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 143 2.88 0.0008
2019-04-12 2019-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 139 40.40 0.0008
2019-01-30 2018-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 99 -6.60 0.0006
2018-10-15 2018-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 106 12.77 0.0006
2018-08-01 2018-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 94 13.25 0.0005
2018-04-20 2018-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 0 0.00 83 25.76 0.0005
2018-01-22 2017-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,603 -28 -1.72 66 -1.49 0.0004
2017-10-25 2017-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,631 0 0.00 67 6.35 0.0004
2017-08-10 2017-06-30 13F/A-2 KEYSIGHT TECHNOLOGS COMMON 49338L103 1,631 -347 -17.54 63 -11.27 0.0004
2017-08-01 2017-06-30 13F/A-1 KEYSIGHT TECHNOLOGS COMMON 49338L103 1,978 347 77 0.0004
2017-07-28 2017-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,978 1,698 77
2017-04-25 2017-03-31 13F/A-1 KEYSIGHT TECHNOLOGS COMMON 49338L103 1,978 0 0.00 71 -1.39 0.0004
2017-04-24 2017-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,213 38
2017-01-25 2016-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,978 765 63.07 72 89.47 0.0004
2016-10-20 2016-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,213 -750 -38.21 38 -33.33 0.0002
2016-07-14 2016-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 1,963 -69 -3.40 57 1.79 0.0004
2016-04-22 2016-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 2,032 0 0.00 56 -1.75 0.0003
2016-01-20 2015-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 2,032 -150 -6.87 57 -14.93 0.0003
2015-10-26 2015-09-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 2,182 -7,850 -78.25 67 -78.53 0.0004
2015-07-17 2015-06-30 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 10,032 -5,624 -35.92 312 -46.30 0.0018
2015-04-30 2015-03-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 15,656 -66,723 -81.00 581 -79.11 0.0033
2015-01-20 2014-12-31 13F KEYSIGHT TECHNOLOGS COMMON 49338L103 82,379 82,379 2,781 0.0157
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.