KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionBlair William & Co/il
Latest Disclosed Ownership32,080 shares
Latest Disclosed Value $ 47,234,807
Blair William & Co/il reports 0.71% increase in ownership of KLAC / KLA Corporation

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 32,080 shares of KLA Corporation (MX:KLAC) valued at $47,234,807 USD as of March 31, 2026.

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)
2026-05-08 2026-03-31 13F KLA COM NEW 482480100 32,080 226 0.71 47,235 22.04 0.1354
2026-02-17 2025-12-31 13F KLA COM NEW 482480100 31,854 584 1.87 38,706 14.76 0.1039
2025-11-12 2025-09-30 13F KLA COM NEW 482480100 31,270 -269 -0.85 33,728 19.39 0.0898
2025-07-24 2025-06-30 13F KLA COM NEW 482480100 31,539 581 1.88 28,250 34.24 0.0785
2025-05-09 2025-03-31 13F KLA COM NEW 482480100 30,958 -252 -0.81 21,045 7.01 0.0635
2025-02-12 2024-12-31 13F KLA COM NEW 482480100 31,210 186 0.60 19,666 -18.14 0.0572
2024-11-12 2024-09-30 13F KLA COM NEW 482480100 31,024 758 2.50 24,026 -3.72 0.0706
2024-08-12 2024-06-30 13F KLA COM NEW 482480100 30,266 1,143 3.92 24,955 22.66 0.0770
2024-05-09 2024-03-31 13F KLA COM NEW 482480100 29,123 2,441 9.15 20,344 31.17 0.0639
2024-02-12 2023-12-31 13F KLA COM NEW 482480100 26,682 634 2.43 15,510 29.82 0.0529
2023-11-09 2023-09-30 13F KLA COM NEW 482480100 26,048 1,608 6.58 11,947 0.79 0.0458
2023-08-11 2023-06-30 13F KLA COM NEW 482480100 24,440 -932 -3.67 11,854 17.04 0.0434
2023-05-12 2023-03-31 13F KLA COM NEW 482480100 25,372 1,359 5.66 10,128 11.86 0.0405
2023-02-10 2022-12-31 13F KLA COM NEW 482480100 24,013 499 2.12 9,054 27.22 0.0394
2022-11-09 2022-09-30 13F KLA COM NEW 482480100 23,514 -420 -1.75 7,116 -6.82 0.0327
2022-08-10 2022-06-30 13F KLA COM NEW 482480100 23,934 1,368 6.06 7,637 -7.55 0.0339
2022-05-13 2022-03-31 13F KLA COM NEW 482480100 22,566 413 1.86 8,261 -13.30 0.0290
2022-02-14 2021-12-31 13F KLA COM NEW 482480100 22,153 4,462 25.22 9,528 61.00 0.0299
2021-11-12 2021-09-30 13F KLA COM NEW 482480100 17,691 1,016 6.09 5,918 9.47 0.0201
2021-08-12 2021-06-30 13F KLA COM NEW 482480100 16,675 410 2.52 5,406 0.60 0.0187
2021-05-13 2021-03-31 13F KLA COM NEW 482480100 16,265 -548 -3.26 5,374 23.46 0.0203
2021-02-09 2020-12-31 13F KLA COM NEW 482480100 16,813 -18 -0.11 4,353 33.49 0.0160
2020-11-06 2020-09-30 13F KLA COM NEW 482480100 16,831 13,951 484.41 3,261 482.32 0.0138
2020-08-12 2020-06-30 13F KLA COM NEW 482480100 2,880 460 19.01 560 60.92 0.0027
2020-05-11 2020-03-31 13F KLA COM NEW 482480100 2,420 -1,299 -34.93 348 -47.51 0.0022
2020-02-13 2019-12-31 13F KLA COM NEW 482480100 3,719 1,495 67.22 663 86.76 0.0034
2019-11-12 2019-09-30 13F KLA COM NEW 482480100 2,224 99 4.66 355 41.43 0.0020
2019-08-13 2019-06-30 13F KLA-TENCOR COM 482480100 2,125 -77 -3.50 251 -4.56 0.0014
2019-05-14 2019-03-31 13F KLA-TENCOR COM 482480100 2,202 2,202 263 0.0016
2018-05-15 2018-03-31 13F KLA-TENCOR COM 482480100 0 -10,189 -100.00 0 -100.00
2018-02-14 2017-12-31 13F KLA-TENCOR COM 482480100 10,189 8,279 433.46 1,071 430.20 0.0073
2017-11-13 2017-09-30 13F KLA-TENCOR COM 482480100 1,910 1,910 202 0.0015
2015-02-05 2014-12-31 13F KLA-TENCOR COM 482480100 0 -3,592 -100.00 0 -100.00
2014-11-04 2014-09-30 13F KLA-TENCOR COM 482480100 3,592 0 0.00 282 8.46 0.0005
2014-08-01 2014-06-30 13F KLA-TENCOR COM 482480100 3,592 -17 -0.47 260 4.00 0.0004
2014-05-06 2014-03-31 13F KLA-TENCOR COM 482480100 3,609 3,609 250 0.0004
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.