KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionOaktop Capital Management Ii, L.p.
Latest Disclosed Ownership310,738 shares
Latest Disclosed Value $ 457,533,739
Oaktop Capital Management Ii, L.p. ownership in KLAC / KLA Corporation

On May 14, 2026 - Oaktop Capital Management Ii, L.p. filed a 13F-HR form disclosing ownership of 310,738 shares of KLA Corporation (MX:KLAC) valued at $457,533,739 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 310,738 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)
2026-05-14 2026-03-31 13F KLA COM NEW 482480100 310,738 0 0.00 457,534 21.18 34.1394
2026-02-17 2025-12-31 13F KLA COM NEW 482480100 310,738 -18,137 -5.51 377,572 6.44 31.9991
2025-11-14 2025-09-30 13F KLA COM NEW 482480100 328,875 -12,124 -3.56 354,725 16.13 32.0814
2025-08-14 2025-06-30 13F KLA COM NEW 482480100 340,999 -23,112 -6.35 305,446 23.40 32.8594
2025-05-15 2025-03-31 13F KLA COM NEW 482480100 364,111 -17,964 -4.70 247,523 2.81 32.9699
2025-02-14 2024-12-31 13F KLA COM NEW 482480100 382,075 -9,506 -2.43 240,753 -20.61 30.0650
2024-11-13 2024-09-30 13F KLA COM NEW 482480100 391,581 -1,213 -0.31 303,244 -6.37 33.0935
2024-08-12 2024-06-30 13F KLA COM NEW 482480100 392,794 -326 -0.08 323,863 17.93 33.1668
2024-05-14 2024-03-31 13F KLA COM NEW 482480100 393,120 0 0.00 274,622 20.17 31.7329
2024-02-13 2023-12-31 13F KLA COM NEW 482480100 393,120 0 0.00 228,521 26.74 30.2960
2023-11-13 2023-09-30 13F KLA COM NEW 482480100 393,120 0 0.00 180,308 -5.44 30.0853
2023-08-11 2023-06-30 13F KLA COM NEW 482480100 393,120 -2,630 -0.66 190,671 20.70 28.9761
2023-05-12 2023-03-31 13F KLA COM NEW 482480100 395,750 0 0.00 157,972 5.87 26.5462
2023-02-13 2022-12-31 13F KLA COM NEW 482480100 395,750 0 0.00 149,210 24.58 26.7040
2022-11-10 2022-09-30 13F KLA COM NEW 482480100 395,750 -5,000 -1.25 119,766 -6.34 24.0697
2022-08-12 2022-06-30 13F KLA COM NEW 482480100 400,750 0 0.00 127,871 -12.83 23.1461
2022-05-16 2022-03-31 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 146,699 -14.89 20.9460
2022-02-11 2021-12-31 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 172,367 28.58 20.7851
2021-11-12 2021-09-30 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 134,055 3.18 18.5732
2021-08-13 2021-06-30 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 129,927 -1.87 18.5977
2021-05-17 2021-03-31 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 132,408 27.61 20.4208
2021-02-09 2020-12-31 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 103,758 33.64 18.2822
2020-11-12 2020-09-30 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 77,641 -0.38 17.1564
2020-08-07 2020-06-30 13F KLA CORP COM Common Stock 482480100 400,750 0 0.00 77,938 35.30 18.3235
2020-05-12 2020-03-31 13F KLA CORPORATION COM Common Stock 482480100 400,750 0 0.00 57,604 -19.32 17.6319
2020-02-03 2019-12-31 13F KLA CORPORATION COM Common Stock 482480100 400,750 0 0.00 71,402 11.74 18.7358
2019-11-08 2019-09-30 13F KLA CORPORATION COM Common Stock 482480100 400,750 0 0.00 63,900 34.90 13.1950
2019-08-07 2019-06-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 47,369 -1.01 10.1855
2019-05-10 2019-03-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 47,854 33.44 9.9936
2019-02-13 2018-12-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 35,863 -12.01 9.9814
2018-10-31 2018-09-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 40,760 -0.80 9.0792
2018-07-20 2018-06-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 41,089 -5.94 9.0036
2018-05-11 2018-03-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 43,686 3.75 9.1494
2018-02-14 2017-12-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 42,107 -0.88 8.4647
2017-11-13 2017-09-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 42,480 15.83 7.1050
2017-08-08 2017-06-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 36,673 -3.74 6.7158
2017-05-08 2017-03-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 38,099 20.83 7.5208
2017-02-14 2016-12-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 400,750 0.00 31,531 6.8892
2016-08-09 2016-06-30 13F KLA-TENCOR CORP COM Common Stock 482480100 0 -400,750 -100.00 0 -100.00
2016-06-17 2016-03-31 13F/A-1 KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 29,178 4.99 7.0692
2016-05-16 2016-03-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 29,178
2016-02-16 2015-12-31 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 0 0.00 27,792 38.70 6.2248
2015-11-16 2015-09-30 13F KLA-TENCOR CORP COM Common Stock 482480100 400,750 40,000 11.09 20,038 -1.18 4.4982
2015-08-13 2015-06-30 13F KLA-TENCOR CORP COM Common Stock 482480100 360,750 0 0.00 20,278 -3.57 4.2893
2015-05-11 2015-03-31 13F KLA-TENCOR CORP COM Common Stock 482480100 360,750 0 0.00 21,028 -17.11 4.6220
2015-02-12 2014-12-31 13F KLA-TENCOR CORP COM Common Stock 482480100 360,750 0 0.00 25,368 -10.74 5.6152
2014-11-12 2014-09-30 13F KLA-TENCOR CORP COM Common Stock 482480100 360,750 0 0.00 28,420 8.45 7.0450
2014-08-14 2014-06-30 13F KLA-TENCOR COM 482480100 360,750 0 0.00 26,205 5.06 6.0267
2014-05-15 2014-03-31 13F KLA-TENCOR COM 482480100 360,750 0 0.00 24,942 7.26 6.3903
2014-02-13 2013-12-31 13F KLA-TENCOR COM 482480100 360,750 0 0.00 23,254 5.93 5.4668
2013-11-14 2013-09-30 13F KLA-TENCOR COM 482480100 360,750 0 0.00 21,952 9.19 5.5241
2013-08-09 2013-06-30 13F KLA-TENCOR COM 482480100 360,750 360,750 20,105 6.0550
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.