KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership259,157 shares
Latest Disclosed Value $ 381,585,358
Rafferty Asset Management, LLC reports 24.17% decrease in ownership of KLAC / KLA Corporation

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 259,157 shares of KLA Corporation (MX:KLAC) valued at $381,585,358 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 341,779 shares of KLA Corporation. This represents a change in shares of -24.17% during the quarter.

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 KLA COM NEW 482480100 259,157 -82,622 -24.17 381,585 -8.12 1.5492
2026-02-13 2025-12-31 13F KLA COM NEW 482480100 341,779 -62,342 -15.43 415,289 -4.73 1.4347
2025-11-12 2025-09-30 13F KLA COM NEW 482480100 404,121 -102,064 -20.16 435,885 -3.87 1.4138
2025-08-14 2025-06-30 13F KLA COM 482480100 506,185 119,409 30.87 453,410 72.45 1.4957
2025-05-14 2025-03-31 13F KLA COM 482480100 386,776 -110,227 -22.18 262,930 -16.04 1.1210
2025-02-14 2024-12-31 13F KLA COM 482480100 497,003 8,015 1.64 313,172 -17.30 1.1082
2024-11-13 2024-09-30 13F KLA COM 482480100 488,988 27,893 6.05 378,677 -0.39 1.2974
2024-08-13 2024-06-30 13F KLA COM 482480100 461,095 -86,888 -15.86 380,177 -0.69 1.4112
2024-05-13 2024-03-31 13F KLA COM 482480100 547,983 108,420 24.67 382,804 49.82 1.4280
2024-02-13 2023-12-31 13F KLA COM 482480100 439,563 -7,665 -1.71 255,518 24.57 1.0775
2023-11-13 2023-09-30 13F KLA COM 482480100 447,228 -42,684 -8.71 205,126 -13.67 1.2056
2023-08-11 2023-06-30 13F KLA COM 482480100 489,912 48,172 10.91 237,617 34.76 1.3396
2023-05-11 2023-03-31 13F KLA COM 482480100 441,740 103,772 30.70 176,329 38.38 1.1948
2023-02-13 2022-12-31 13F KLA COM 482480100 337,968 1,104 0.33 127,424 24.99 1.0669
2022-11-14 2022-09-30 13F KLA COM 482480100 336,864 -27,046 -7.43 101,945 -12.20 1.0851
2022-08-12 2022-06-30 13F KLA COM 482480100 363,910 -142,045 -28.07 116,116 -37.31 1.0685
2022-05-13 2022-03-31 13F KLA COM 482480100 505,955 54,483 12.07 185,210 -4.62 1.0977
2022-02-10 2021-12-31 13F KLA COM 482480100 451,472 118,174 35.46 194,183 74.17 1.0219
2021-11-10 2021-09-30 13F KLA COM 482480100 333,298 -123,378 -27.02 111,492 -24.70 0.7618
2021-08-10 2021-06-30 13F KLA COM 482480100 456,676 20,941 4.81 148,059 2.84 0.9324
2021-05-10 2021-03-31 13F KLA COM 482480100 435,735 210,899 93.80 143,967 147.31 0.9836
2021-02-10 2020-12-31 13F KLA COM 482480100 224,836 -4,682 -2.04 58,212 30.91 0.5689
2020-11-13 2020-09-30 13F KLA COM 482480100 229,518 28,466 14.16 44,467 13.72 0.5377
2020-08-07 2020-06-30 13F KLA COM 482480100 201,052 129,231 179.93 39,101 278.74 0.5509
2020-05-15 2020-03-31 13F KLA COM 482480100 71,821 -29,753 -29.29 10,324 -42.95 0.4322
2020-02-10 2019-12-31 13F KLA COM 482480100 101,574 4,563 4.70 18,097 17.00 0.2784
2019-11-14 2019-09-30 13F KLA COM 482480100 97,011 -53,302 -35.46 15,468 -12.94 0.2419
2019-08-09 2019-06-30 13F KLA-TENCOR COM 482480100 150,313 16,728 12.52 17,767 11.38 0.3123
2019-05-15 2019-03-31 13F KLA-TENCOR COM 482480100 133,585 9,362 7.54 15,951 43.48 0.2566
2019-02-11 2018-12-31 13F KLA-TENCOR COM 482480100 124,223 -39,068 -23.93 11,117 -33.06 0.2425
2018-11-09 2018-09-30 13F KLA-TENCOR COM 482480100 163,291 -20,136 -10.98 16,608 -11.69 0.2573
2018-08-14 2018-06-30 13F KLA-TENCOR COM 482480100 183,427 -3,042 -1.63 18,807 -7.48 0.2810
2018-05-15 2018-03-31 13F KLA-TENCOR COM 482480100 186,469 33,297 21.74 20,327 26.30 0.3012
2018-02-14 2017-12-31 13F KLA-TENCOR COM 482480100 153,172 53,685 53.96 16,094 52.61 0.2780
2017-11-13 2017-09-30 13F KLA-TENCOR COM 482480100 99,487 84,852 579.79 10,546 687.60 0.2365
2017-08-11 2017-06-30 13F KLA-TENCOR COM 482480100 14,635 2,492 20.52 1,339 16.03 0.0384
2017-05-11 2017-03-31 13F KLA-TENCOR COM 482480100 12,143 -734 -5.70 1,154 13.92 0.0254
2017-02-13 2016-12-31 13F KLA-TENCOR COM 482480100 12,877 12,877 0.00 1,013 0.0464
2016-05-12 2016-03-31 13F KLA-TENCOR COM 482480100 0 -15,429 -100.00 0 -100.00
2016-02-12 2015-12-31 13F KLA-TENCOR COM 482480100 15,429 -16,967 -52.37 1,075 -33.64 0.1293
2015-11-12 2015-09-30 13F KLA-TENCOR COM 482480100 32,396 -11,362 -25.97 1,620 -34.15 0.1279
2015-08-12 2015-06-30 13F KLA-TENCOR COM 482480100 43,758 19,559 80.83 2,460 74.34 0.1652
2015-05-14 2015-03-31 13F KLA-TENCOR COM 482480100 24,199 -146 -0.60 1,411 -17.58 0.1063
2015-02-13 2014-12-31 13F KLA-TENCOR COM 482480100 24,345 13,297 120.36 1,712 96.78 0.3885
2014-11-14 2014-09-30 13F KLA-TENCOR COM 482480100 11,048 -10,827 -49.49 870 -45.25 0.0936
2014-08-13 2014-06-30 13F KLA-TENCOR COM 482480100 21,875 9,737 80.22 1,589 89.39 0.3056
2014-05-14 2014-03-31 13F KLA-TENCOR COM 482480100 12,138 4,233 53.55 839 64.51 0.1737
2014-02-06 2013-12-31 13F KLA-TENCOR COM 482480100 7,905 7,905 20.32 510 39.34 0.1219
2013-11-08 2013-09-30 13F KLA-TENCOR COM 482480100 0 -6,570 -100.00 0 -100.00
2013-08-13 2013-06-30 13F KLA-TENCOR COM 482480100 6,570 6,570 366 0.0504
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.