KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionGuinness Atkinson Asset Management Inc
Latest Disclosed Ownership4,134 shares
Latest Disclosed Value $ 6,086,943
Guinness Atkinson Asset Management Inc reports 22.71% decrease in ownership of KLAC / KLA Corporation

On April 21, 2026 - Guinness Atkinson Asset Management Inc filed a 13F-HR form disclosing ownership of 4,134 shares of KLA Corporation (MX:KLAC) valued at $6,086,943 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 5,349 shares of KLA Corporation. This represents a change in shares of -22.71% 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)
2026-04-21 2026-03-31 13F KLA COM NEW 482480100 4,134 -1,215 -22.71 6,087 -9.72 3.0404
2026-02-10 2025-12-31 13F/A-1 KLA COM NEW 482480100 5,349 -1,164 -17.87 6,742 -2.73 3.1751
2026-02-09 2025-12-31 13F KLA COM NEW 482480100 6,513 0 6,931 3.2922
2025-11-05 2025-09-30 13F KLA COM NEW 482480100 6,513 -1,659 -20.30 6,931 -5.31 3.2921
2025-08-01 2025-06-30 13F KLA COM NEW 482480100 8,172 -646 -7.33 7,320 22.11 3.8389
2025-05-12 2025-03-31 13F KLA COM NEW 482480100 8,818 -427 -4.62 5,994 2.90 3.3395
2025-01-16 2024-12-31 13F KLA COM NEW 482480100 9,245 856 10.20 5,825 -10.33 2.9707
2024-10-10 2024-09-30 13F KLA COM NEW 482480100 8,389 -3,335 -28.45 6,497 -32.80 3.1603
2024-07-11 2024-06-30 13F KLA COM NEW 482480100 11,724 -979 -7.71 9,667 8.94 4.7326
2024-04-12 2024-03-31 13F KLA COM NEW 482480100 12,703 0 0.00 8,874 20.17 4.1691
2024-02-12 2023-12-31 13F KLA COM NEW 482480100 12,703 -276 -2.13 7,384 24.06 3.7773
2023-11-06 2023-09-30 13F KLA COM NEW 482480100 12,979 0 0.00 5,953 -5.45 3.3113
2023-07-24 2023-06-30 13F KLA COM NEW 482480100 12,979 -309 -2.33 6,295 18.68 3.3337
2023-04-10 2023-03-31 13F KLA COM NEW 482480100 13,288 -281 -2.07 5,304 3.70 2.9954
2023-02-02 2022-12-31 13F KLA COM NEW 482480100 13,569 -681 -4.78 5,116 18.62 3.2195
2022-10-24 2022-09-30 13F KLA COM NEW 482480100 14,250 -3,648 -20.38 4,312 -24.50 2.7512
2022-09-06 2022-06-30 13F KLA COM NEW 482480100 17,898 -1,704 -8.69 5,711 -20.42 3.3302
2022-04-13 2022-03-31 13F KLA COM NEW 482480100 19,602 -393 -1.97 7,176 -16.56 3.4479
2022-01-19 2021-12-31 13F KLA COM NEW 482480100 19,995 -557 -2.71 8,600 25.09 3.7571
2021-12-07 2021-09-30 13F KLA COM NEW 482480100 20,552 -3,128 -13.21 6,875 -10.45 3.1940
2021-08-03 2021-06-30 13F KLA COM NEW 482480100 23,680 0 0.00 7,677 -1.88 3.4008
2021-04-21 2021-03-31 13F KLA COM NEW 482480100 23,680 -1,970 -7.68 7,824 17.81 3.8680
2021-01-25 2020-12-31 13F KLA COM NEW 482480100 25,650 -5,500 -17.66 6,641 10.04 3.5517
2020-10-27 2020-09-30 13F KLA COM NEW 482480100 31,150 0 0.00 6,035 -0.38 3.6690
2020-07-28 2020-06-30 13F KLA COM NEW 482480100 31,150 -2,200 -6.60 6,058 26.37 3.9153
2020-04-30 2020-03-31 13F KLA COM NEW 482480100 33,350 -2,870 -7.92 4,794 -25.71 3.7967
2020-02-04 2019-12-31 13F KLA COM NEW 482480100 36,220 0 0.00 6,453 11.74 4.5495
2019-10-28 2019-09-30 13F KLA COM NEW 482480100 36,220 -18,030 -33.24 5,775 -9.93 4.5601
2019-07-26 2019-06-30 13F KLA-TENCOR COM 482480100 54,250 0 0.00 6,412 -1.02 4.7612
2019-04-24 2019-03-31 13F KLA-TENCOR COM 482480100 54,250 -7,300 -11.86 6,478 17.61 4.8587
2019-01-28 2018-12-31 13F KLA-TENCOR COM 482480100 61,550 -6,850 -10.01 5,508 -20.83 4.7040
2018-10-17 2018-09-30 13F KLA-TENCOR COM 482480100 68,400 0 0.00 6,957 -0.80 4.4644
2018-08-16 2018-06-30 13F KLA-TENCOR COM 482480100 68,400 0 0.00 7,013 -5.94 3.9363
2018-04-17 2018-03-31 13F KLA-TENCOR COM 482480100 68,400 68,400 7,456 4.5543
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.