KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership250,998 shares
Latest Disclosed Value $ 369,571,837
Rhumbline Advisers reports 1.81% decrease in ownership of KLAC / KLA Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 250,998 shares of KLA Corporation (MX:KLAC) valued at $369,571,837 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 255,619 shares of KLA Corporation. This represents a change in shares of -1.81% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F KLA COM 482480100 250,998 -4,621 -1.81 369,572 18.99 0.3162
2026-02-13 2025-12-31 13F KLA COM 482480100 255,619 -19,434 -7.07 310,597 4.69 0.2511
2025-11-06 2025-09-30 13F KLA COM 482480100 275,053 11,349 4.30 296,672 25.60 0.2383
2025-08-12 2025-06-30 13F KLA COM 482480100 263,704 -1,839 -0.69 236,210 30.85 0.2023
2025-05-29 2025-03-31 13F/A-1 KLA COM 482480100 265,543 14,510 5.78 180,516 14.12 0.1689
2025-04-08 2025-03-31 13F KLA COM 482480100 265,543 14,510 180,516 0.1689
2025-05-29 2024-12-31 13F/A-1 KLA COM 482480100 251,033 -5,596 -2.18 158,181 -20.41 0.1415
2025-01-30 2024-12-31 13F KLA COM 482480100 251,033 -5,596 158,181 0.1415
2024-11-12 2024-09-30 13F KLA COM 482480100 256,629 -2,436 -0.94 198,736 -6.96 0.1793
2024-08-01 2024-06-30 13F KLA COM 482480100 259,065 -2,092 -0.80 213,602 17.08 0.2008
2024-05-09 2024-03-31 13F KLA COM 482480100 261,157 2,029 0.78 182,436 21.11 0.1752
2024-02-08 2023-12-31 13F KLA COM 482480100 259,128 -3,387 -1.29 150,631 25.10 0.1579
2023-11-09 2023-09-30 13F KLA COM 482480100 262,515 -135 -0.05 120,405 -5.48 0.1398
2023-08-08 2023-06-30 13F KLA COM 482480100 262,650 -2,398 -0.90 127,391 121,223.81 0.1427
2023-05-11 2023-03-31 13F KLA COM 482480100 265,048 8,370 3.26 106 -99.89 0.1305
2023-02-14 2022-12-31 13F KLA COM 482480100 256,678 6,079 2.43 96,775 27.61 0.1301
2022-11-10 2022-09-30 13F KLA COM 482480100 250,599 -2,342 -0.93 75,839 -6.03 0.1130
2022-08-11 2022-06-30 13F KLA COM 482480100 252,941 7,404 3.02 80,708 -10.21 0.1178
2022-05-12 2022-03-31 13F KLA COM 482480100 245,537 2,615 1.08 89,881 -13.98 0.1157
2022-02-10 2021-12-31 13F KLA COM 482480100 242,922 3,307 1.38 104,483 30.35 0.1281
2021-11-12 2021-09-30 13F KLA COM 482480100 239,615 -4,971 -2.03 80,154 1.08 0.1085
2021-08-05 2021-06-30 13F KLA COM 482480100 244,586 -19,599 -7.42 79,297 -9.15 0.1041
2021-05-06 2021-03-31 13F KLA COM 482480100 264,185 -16,771 -5.97 87,287 20.00 0.1186
2021-02-10 2020-12-31 13F KLA COM 482480100 280,956 -6,393 -2.22 72,742 30.66 0.1004
2020-11-12 2020-09-30 13F KLA COM 482480100 287,349 -8,389 -2.84 55,671 -3.21 0.0872
2020-08-13 2020-06-30 13F KLA COM 482480100 295,738 -969 -0.33 57,515 34.86 0.0960
2020-05-06 2020-03-31 13F KLA COM 482480100 296,707 -4,782 -1.59 42,649 -20.60 0.0894
2020-02-05 2019-12-31 13F KLA COM 482480100 301,489 11,894 4.11 53,716 16.33 0.0898
2019-10-23 2019-09-30 13F KLA COM 482480100 289,595 1,231 0.43 46,176 35.47 0.0844
2019-08-14 2019-06-30 13F KLA COM 482480100 288,364 3,403 1.19 34,085 0.17 0.0640
2019-05-01 2019-03-31 13F KLA-TENCOR COM 482480100 284,961 4,916 1.76 34,027 35.78 0.0659
2019-01-31 2018-12-31 13F KLA-TENCOR COM 482480100 280,045 -14,676 -4.98 25,061 -16.40 0.0545
2018-11-07 2018-09-30 13F KLA-TENCOR COM 482480100 294,721 -6,157 -2.05 29,976 -2.83 0.0579
2018-08-06 2018-06-30 13F KLA-TENCOR COM 482480100 300,878 -5,943 -1.94 30,849 -7.77 0.0622
2018-05-02 2018-03-31 13F KLA-TENCOR COM 482480100 306,821 -7,805 -2.48 33,447 1.18 0.0699
2018-02-09 2017-12-31 13F KLA-TENCOR COM 482480100 314,626 1,776 0.57 33,058 -0.31 0.0671
2017-11-06 2017-09-30 13F KLA-TENCOR COM 482480100 312,850 -2,767 -0.88 33,162 14.82 0.0721
2017-08-02 2017-06-30 13F KLA-TENCOR COM 482480100 315,617 13,693 4.54 28,882 0.62 0.0659
2017-05-02 2017-03-31 13F KLA-TENCOR COM 482480100 301,924 7,822 2.66 28,704 24.04 0.0670
2017-01-27 2016-12-31 13F KLA-TENCOR COM 482480100 294,102 24,280 9.00 23,140 23.03 0.0586
2016-11-08 2016-09-30 13F KLA-TENCOR COM 482480100 269,822 7,795 2.97 18,809 -2.00 0.0518
2016-08-11 2016-06-30 13F KLA-TENCOR COM 482480100 262,027 18,819 7.74 19,193 8.39 0.0569
2016-05-02 2016-03-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 243,208 884 0.36 17,708 5.37 0.0549
2016-02-03 2015-12-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 242,324 16,482 7.30 16,805 48.82 0.0541
2015-11-04 2015-09-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 225,842 -13,519 -5.65 11,292 -16.07 0.0384
2015-08-04 2015-06-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 239,361 12,200 5.37 13,454 1.61 0.0429
2015-05-12 2015-03-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 227,161 -5,374 -2.31 13,241 -19.03 0.0382
2015-02-06 2014-12-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 232,535 -3,020 -1.28 16,352 -11.88 0.0475
2014-11-12 2014-09-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 235,555 -6,792 -2.80 18,557 5.41 0.0557
2014-08-06 2014-06-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 242,347 17,521 7.79 17,604 13.25 0.0517
2014-05-06 2014-03-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 224,826 -2,750 -1.21 15,544 5.96 0.0461
2014-02-03 2013-12-31 13F KLA TENCOR CORPORATION COMMON COM 482480100 227,576 -18,696 -7.59 14,670 -2.11 0.0433
2013-11-05 2013-09-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 246,272 3,021 1.24 14,986 10.55 0.0464
2013-08-07 2013-06-30 13F KLA TENCOR CORPORATION COMMON COM 482480100 243,251 243,251 13,556 0.0436
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.