KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionYorktown Management & Research Co Inc
Latest Disclosed Ownership890 shares
Latest Disclosed Value $ 1,310,445
Yorktown Management & Research Co Inc ownership in KLAC / KLA Corporation

On April 20, 2026 - Yorktown Management & Research Co Inc filed a 13F-HR form disclosing ownership of 890 shares of KLA Corporation (MX:KLAC) valued at $1,310,445 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 890 shares of KLA Corporation. This represents a change in shares of 0.00% 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)
2026-04-20 2026-03-31 13F KLA COM NEW 482480100 890 0 0.00 1,310 21.18 1.0962
2026-01-23 2025-12-31 13F KLA COM NEW 482480100 890 0 0.00 1,081 12.72 0.8645
2025-10-29 2025-09-30 13F KLA-Tencor COM NEW 482480100 890 0 0.00 960 20.33 0.7653
2025-08-04 2025-06-30 13F KLA-Tencor COM NEW 482480100 890 0 0.00 797 31.74 0.7609
2025-04-23 2025-03-31 13F KLA-Tencor COM NEW 482480100 890 0 0.00 605 8.04 0.6575
2025-01-27 2024-12-31 13F KLA-Tencor COM NEW 482480100 890 0 0.00 561 -18.72 0.5391
2024-10-25 2024-09-30 13F KLA-Tencor COM NEW 482480100 890 -610 -40.67 689 -44.26 0.7062
2024-07-30 2024-06-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 1,237 18.05 1.3289
2024-04-26 2024-03-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 1,048 20.21 0.9972
2024-01-26 2023-12-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 872 26.78 0.9103
2023-10-26 2023-09-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 688 -5.50 0.7739
2023-07-28 2023-06-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 728 21.57 0.7823
2023-04-21 2023-03-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 599 5.84 0.6460
2023-01-26 2022-12-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 566 24.45 0.6915
2022-11-04 2022-09-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 454 -5.22 0.5884
2022-07-29 2022-06-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 479 -12.75 0.6178
2022-04-29 2022-03-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 549 -14.88 0.4658
2022-02-09 2021-12-31 13F KLA-Tencor COM 482480100 1,500 0 0.00 645 28.49 0.4356
2021-11-04 2021-09-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 502 3.29 0.3775
2021-08-03 2021-06-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 486 -2.02 0.3810
2021-05-11 2021-03-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 496 27.84 0.4119
2021-02-11 2020-12-31 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 388 33.33 0.3491
2020-11-06 2020-09-30 13F KLA-Tencor COM NEW 482480100 1,500 0 0.00 291 -0.34 0.2719
2020-08-11 2020-06-30 13F KLA-Tencor COM NEW 482480100 1,500 -1,700 -53.12 292 -36.52 0.2616
2020-04-29 2020-03-31 13F KLA-Tencor COM NEW 482480100 3,200 1,700 113.33 460 72.28 0.4651
2020-01-27 2019-12-31 13F KLA-Tencor COM 482480100 1,500 0 0.00 267 11.72 0.1434
2019-11-01 2019-09-30 13F KLA-Tencor COM NEW 482480100 1,500 1,500 0.00 239 -10.49 0.1287
2019-08-02 2019-06-30 13F KLA-Tencor COM 482480100 0 -11,500 -100.00 0 -100.00
2019-05-13 2019-03-31 13F KLA-Tencor COM 482480100 11,500 1,500 15.00 1,373 53.41 0.4436
2019-02-08 2018-12-31 13F KLA-Tencor COM 482480100 10,000 -1,800 -15.25 895 -25.42 0.2967
2018-11-08 2018-09-30 13F KLA-Tencor COM 482480100 11,800 3,000 34.09 1,200 33.04 0.3512
2018-08-10 2018-06-30 13F KLA-Tencor COM 482480100 8,800 8,800 902 0.2616
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.