KLA 공사
US ˙ NasdaqGS ˙ US4824801009

SecurityKLAC / KLA Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership1,240,678 shares
Latest Disclosed Value $ 1,826,754,552
Janus Henderson Group Plc reports 8.26% decrease in ownership of KLAC / KLA Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 1,240,678 shares of KLA Corporation (US:KLAC) valued at $1,826,786,694 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,352,323 shares of KLA Corporation. This represents a change in shares of -8.26% during the quarter. The current value of the position is $2,644,008,886 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)
2026-05-18 2026-03-31 13F/A-1 KLA COM NEW 482480100 1,240,678 -111,645 -8.26 1,826,755 11.17 0.3080
2026-05-15 2026-03-31 13F KLA COM NEW 482480100 1,240,678 -111,645 -8.26 1,826,755 11.17 0.3389
2026-02-17 2025-12-31 13F KLA COM NEW 482480100 1,352,323 -142,874 -9.56 1,643,157 1.89 0.7358
2025-11-14 2025-09-30 13F KLA COM NEW 482480100 1,495,197 -58,287 -3.75 1,612,636 15.89 0.7362
2025-08-14 2025-06-30 13F KLA COM NEW 482480100 1,553,484 -75,439 -4.63 1,391,468 26.81 0.6820
2025-05-15 2025-03-31 13F KLA COM NEW 482480100 1,628,923 178,100 12.28 1,097,282 20.03 0.6015
2025-02-14 2024-12-31 13F KLA COM NEW 482480100 1,450,823 -256,133 -15.01 914,200 -30.84 0.4647
2024-11-14 2024-09-30 13F KLA COM NEW 482480100 1,706,956 -74,362 -4.17 1,321,862 -10.00 0.6766
2024-08-14 2024-06-30 13F KLA COM NEW 482480100 1,781,318 -159,244 -8.21 1,468,698 8.34 0.7865
2024-05-15 2024-03-31 13F KLA COM NEW 482480100 1,940,562 -168,807 -8.00 1,355,594 10.55 0.7394
2024-02-14 2023-12-31 13F KLA COM NEW 482480100 2,109,369 -237,542 -10.12 1,226,186 13.91 0.7314
2023-11-14 2023-09-30 13F KLA COM NEW 482480100 2,346,911 102,250 4.56 1,076,441 -1.13 0.7049
2023-08-14 2023-06-30 13F KLA COM NEW 482480100 2,244,661 -33,150 -1.46 1,088,697 19.74 0.6771
2023-05-15 2023-03-31 13F KLA COM NEW 482480100 2,277,811 -135,182 -5.60 909,236 -0.06 0.5995
2023-02-14 2022-12-31 13F KLA COM NEW 482480100 2,412,993 -20,161 -0.83 909,780 23.55 0.6499
2023-01-13 2022-09-30 13F/A-1 KLA COM NEW 482480100 2,433,154 -107,283 -4.22 736,347 -9.16 0.5517
2022-11-14 2022-09-30 13F KLA COM NEW 482480100 2,433,154 -107,283 736,347 0.1871
2022-08-15 2022-06-30 13F KLA COM NEW 482480100 2,540,437 -67,174 -2.58 810,607 -15.08 0.5589
2022-05-16 2022-03-31 13F KLA COM NEW 482480100 2,607,611 -650,270 -19.96 954,542 -31.88 0.4609
2022-02-14 2021-12-31 13F KLA COM NEW 482480100 3,257,881 105,245 3.34 1,401,248 32.87 0.5845
2021-11-16 2021-09-30 13F KLA COM NEW 482480100 3,152,636 -534,862 -14.50 1,054,590 -11.79 0.4612
2021-08-16 2021-06-30 13F KLA COM NEW 482480100 3,687,498 64,260 1.77 1,195,527 -0.13 0.5117
2021-05-17 2021-03-31 13F KLA COM NEW 482480100 3,623,238 65,980 1.85 1,197,123 29.98 0.5465
2021-02-16 2020-12-31 13F KLA COM NEW 482480100 3,557,258 -60,051 -1.66 921,013 31.42 0.4279
2020-11-16 2020-09-30 13F KLA COM NEW 482480100 3,617,309 25,544 0.71 700,816 0.33 0.3654
2020-08-14 2020-06-30 13F KLA COM NEW 482480100 3,591,765 -244,384 -6.37 698,522 26.68 0.3921
2020-05-14 2020-03-31 13F KLA COM NEW 482480100 3,836,149 276,081 7.75 551,410 -13.07 0.3795
2020-02-18 2019-12-31 13F KLA COM NEW 482480100 3,560,068 12,486 0.35 634,297 12.13 0.3248
2019-11-14 2019-09-30 13F KLA COM NEW 482480100 3,547,582 155,640 4.59 565,663 41.09 0.3064
2019-07-31 2019-06-30 13F KLA-TENCOR COM 482480100 3,391,942 418,962 14.09 400,927 12.94 0.2183
2019-04-30 2019-03-31 13F KLA-TENCOR COM 482480100 2,972,980 53,954 1.85 355,004 35.90 0.1968
2019-02-06 2018-12-31 13F KLA-TENCOR COM 482480100 2,919,026 21,409 0.74 261,227 -11.36 0.1666
2018-11-09 2018-09-30 13F KLA-TENCOR COM 482480100 2,897,617 -89,510 -3.00 294,717 -3.77 0.1575
2018-08-10 2018-06-30 13F KLA-TENCOR COM 482480100 2,987,127 -60,413 -1.98 306,270 -7.81 0.1746
2018-05-14 2018-03-31 13F KLA-TENCOR COM 482480100 3,047,540 -602,080 -16.50 332,212 -13.37 0.1958
2018-03-12 2017-12-31 13F/A-1 KLA-TENCOR COM 482480100 3,649,620 -867,283 -19.20 383,466 -19.91 0.2361
2018-02-09 2017-12-31 13F KLA-TENCOR COM 482480100 3,649,620 -867,283 383,466
2017-11-14 2017-09-30 13F KLA-TENCOR COM 482480100 4,516,903 208,499 4.84 478,792 21.44 0.3069
2017-08-17 2017-06-30 13F/A-1 KLA-TENCOR COM 482480100 4,308,404 4,290,618 24,123.57 394,262 23,215.32 0.2687
2017-08-14 2017-06-30 13F KLA-TENCOR COM 482480100 4,308,404 4,290,618 394,262
2017-05-03 2017-03-31 13F KLA-TENCOR COM 482480100 17,786 -3,158 -15.08 1,691 2.61 0.0119
2017-01-30 2016-12-31 13F KLA-TENCOR COM 482480100 20,944 2,100 11.14 1,648 25.42 0.0122
2016-10-24 2016-09-30 13F KLA-TENCOR COM 482480100 18,844 -5,767 -23.43 1,314 -27.12 0.0097
2016-07-29 2016-06-30 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,803 0.61 0.0150
2016-05-12 2016-03-31 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,792 4.98 0.0145
2016-02-03 2015-12-31 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,707 38.78 0.0137
2015-11-16 2015-09-30 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,230 -11.13 0.0108
2015-08-17 2015-06-30 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,384 -3.55 0.0109
2015-06-02 2015-03-31 13F/A-1 KLA-TENCOR COM 482480100 24,611 0 0.00 1,435 -17.10 0.0111
2015-05-15 2015-03-31 13F KLA-TENCOR COM 482480100 24,611 1,435
2015-02-12 2014-12-31 13F KLA-TENCOR COM 482480100 24,611 0 0.00 1,731 -10.73 0.0125
2014-11-12 2014-09-30 13F KLA-TENCOR COM 482480100 24,611 -377,840 -93.88 1,939 -93.37 0.0182
2014-08-13 2014-06-30 13F KLA-TENCOR COM 482480100 402,451 -23,060 -5.42 29,236 -0.64 0.2730
2014-05-08 2014-03-31 13F KLA-TENCOR COM 482480100 425,511 295,530 227.36 29,424 251.21 0.2864
2014-01-14 2013-12-31 13F KLA-TENCOR COM 482480100 129,981 -26,374 -16.87 8,378 -11.92 0.0846
2013-11-12 2013-09-30 13F KLA-TENCOR COM 482480100 156,355 -260,245 -62.47 9,512 -58.69 0.1049
2013-08-15 2013-06-30 13F KLA-TENCOR COM 482480100 416,600 416,600 23,028 0.2692
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.