KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership303,514 shares
Latest Disclosed Value $ 446,897,043
Robeco Institutional Asset Management B.V. reports 1.83% increase in ownership of KLAC / KLA Corporation

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 303,514 shares of KLA Corporation (MX:KLAC) valued at $446,897,043 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 298,069 shares of KLA Corporation. This represents a change in shares of 1.83% 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)
2026-04-21 2026-03-31 13F KLA COM NEW 482480100 303,514 5,445 1.83 446,897 23.39 0.6370
2026-01-23 2025-12-31 13F KLA COM NEW 482480100 298,069 5,491 1.88 362,178 14.77 0.5158
2025-10-22 2025-09-30 13F KLA COM NEW 482480100 292,578 77,121 35.79 315,575 63.52 0.4572
2025-07-18 2025-06-30 13F KLA COM NEW 482480100 215,457 121,111 128.37 192,993 200.91 0.3121
2025-04-23 2025-03-31 13F KLA COM NEW 482480100 94,346 -9,039 -8.74 64,136 -1.55 0.1246
2025-01-23 2024-12-31 13F KLA COM NEW 482480100 103,385 -14,941 -12.63 65,145 -28.91 0.1235
2024-10-29 2024-09-30 13F KLA COM NEW 482480100 118,326 27,749 30.64 91,633 22.70 0.1820
2024-07-23 2024-06-30 13F KLA COM NEW 482480100 90,577 -3,881 -4.11 74,682 13.18 0.1607
2024-04-24 2024-03-31 13F KLA COM NEW 482480100 94,458 -5,870 -5.85 65,986 13.14 0.1434
2024-02-14 2023-12-31 13F/A-1 KLA COM NEW 482480100 100,328 5,908 6.26 58,321 34.67 0.1414
2024-02-08 2023-12-31 13F KLA COM NEW 482480100 41,853 -52,567 100 0.0188
2023-10-24 2023-09-30 13F KLA COM NEW 482480100 94,420 790 0.84 43,307 -4.64 0.1157
2023-07-24 2023-06-30 13F KLA COM NEW 482480100 93,630 15,465 19.79 45,412 45.55 0.1191
2023-05-04 2023-03-31 13F KLA COM NEW 482480100 78,165 21,118 37.02 31,201 45.07 0.0851
2023-02-07 2022-12-31 13F KLA COM NEW 482480100 57,047 -7,120 -11.10 21,508 10.76 0.0620
2022-12-01 2022-09-30 13F/A-1 KLA COM NEW 482480100 64,167 7,574 13.38 19,418 7.53 0.0628
2022-10-27 2022-09-30 13F KLA COM NEW 482480100 64,167 7,574 19,418 0.0619
2022-12-01 2022-06-30 13F/A-1 KLA COM NEW 482480100 56,593 2,802 5.21 18,058 -8.28 0.0561
2022-07-27 2022-06-30 13F KLA COM NEW 482480100 56,593 2,802 18,058 0.0553
2022-12-01 2022-03-31 13F/A-1 KLA COM NEW 482480100 53,791 -9,700 -15.28 19,689 -27.90 0.0464
2022-04-26 2022-03-31 13F KLA COM NEW 482480100 53,791 -9,700 19,689 0.0458
2022-12-01 2021-12-31 13F/A-1 KLA COM NEW 482480100 63,491 -6,405 -9.16 27,307 16.80 0.0581
2022-01-31 2021-12-31 13F KLA COM NEW 482480100 63,491 -6,405 27,307 0.0574
2022-12-01 2021-09-30 13F/A-1 KLA COM NEW 482480100 69,896 -3,960 -5.36 23,380 -2.36 0.0518
2021-10-20 2021-09-30 13F KLA COM NEW 482480100 69,896 -3,960 23,380 0.0512
2022-12-01 2021-06-30 13F/A-1 KLA COM NEW 482480100 73,856 3,869 5.53 23,946 3.55 0.0531
2021-07-28 2021-06-30 13F KLA COM NEW 482480100 73,856 3,869 23,946 0.0524
2022-12-01 2021-03-31 13F/A-1 KLA COM NEW 482480100 69,987 1,665 2.44 23,126 30.75 0.0570
2021-04-23 2021-03-31 13F KLA COM NEW 482480100 69,987 1,665 23,126 0.0562
2022-12-01 2020-12-31 13F/A-1 KLA COM NEW 482480100 68,322 -67,055 -49.53 17,687 -32.56 0.0465
2021-01-28 2020-12-31 13F KLA COM NEW 482480100 68,322 -67,055 17,687 0.0459
2021-01-19 2020-09-30 13F/A-1 KLA COM NEW 482480100 135,377 39,484 41.18 26,228 40.65 0.0811
2020-10-29 2020-09-30 13F KLA COM NEW 482480100 135,377 39,484 26,228 81,000.6002
2021-01-19 2020-06-30 13F/A-1 KLA COM NEW 482480100 95,893 47,622 98.66 18,648 168.70 0.0633
2020-07-20 2020-06-30 13F KLA COM NEW 482480100 95,893 47,622 18,648 63,275.9902
2021-01-19 2020-03-31 13F/A-1 KLA COM NEW 482480100 48,271 12,455 34.77 6,940 8.78 0.0278
2020-04-30 2020-03-31 13F KLA COM NEW 482480100 48,271 12,455 6,940 27,817.0851
2021-01-19 2019-12-31 13F/A-1 KLA COM NEW 482480100 35,816 1,505 4.39 6,380 16.64 0.0204
2020-02-06 2019-12-31 13F KLA COM NEW 482480100 35,816 1,505 6,380 20,405.9394
2021-01-19 2019-09-30 13F/A-1 KLA COM NEW 482480100 34,311 -14,991 -30.41 5,470 -6.14 0.0193
2019-10-17 2019-09-30 13F KLA COM NEW 482480100 34,311 -14,991 5,470 19,283.9996
2021-01-19 2019-06-30 13F/A-1 KLA-TENCOR COM 482480100 49,302 -74,712 -60.24 5,828 -60.65 0.0206
2019-07-19 2019-06-30 13F KLA-TENCOR COM 482480100 49,302 -74,712 5,828 20,551.0524
2021-01-19 2019-03-31 13F/A-1 KLA-TENCOR COM 482480100 124,014 -53,819 -30.26 14,809 -6.80 0.0545
2019-05-02 2019-03-31 13F KLA-TENCOR COM 482480100 124,014 -53,819 14,809 54,373.3799
2021-01-19 2018-12-31 13F/A-1 KLA-TENCOR COM 482480100 177,833 -300,288 -62.81 15,889 -67.32 0.0713
2019-02-08 2018-12-31 13F KLA-TENCOR COM 482480100 177,833 -300,288 15,889 71,221.6551
2021-01-19 2018-09-30 13F/A-1 KLA-TENCOR COM 482480100 478,121 -631 -0.13 48,627 -0.93 0.1926
2018-10-25 2018-09-30 13F KLA-TENCOR COM 482480100 477,075 -1,677 48,521
2021-01-19 2018-06-30 13F/A-1 KLA-TENCOR COM 482480100 478,752 -5,010 -1.04 49,083 -6.93 0.2236
2018-08-03 2018-06-30 13F KLA-TENCOR COM 482480100 478,752 -5,010 49,083
2021-01-19 2018-03-31 13F/A-1 KLA-TENCOR COM 482480100 483,762 30,553 6.74 52,735 10.75 0.2474
2018-05-07 2018-03-31 13F KLA-TENCOR COM 482480100 483,762 30,553 52,735 246,616.9264
2021-01-19 2017-12-31 13F/A-1 KLA-TENCOR COM 482480100 453,209 42,222 10.27 47,618 9.30 0.2468
2018-01-25 2017-12-31 13F KLA-TENCOR COM 482480100 453,209 42,222 47,618
2021-01-19 2017-09-30 13F/A-1 KLA-TENCOR COM 482480100 410,987 12,731 3.20 43,567 19.55 0.2705
2017-10-17 2017-09-30 13F KLA-TENCOR COM 482480100 410,987 12,731 43,567 269,912.8488
2021-01-19 2017-06-30 13F/A-1 KLA-TENCOR COM 482480100 398,256 353,626 792.35 36,444 759.33 0.2347
2017-08-07 2017-06-30 13F KLA-TENCOR COM 482480100 398,256 353,626 36,444 237,279.7907
2021-01-19 2017-03-31 13F/A-1 KLA-TENCOR COM 482480100 44,630 35,179 372.23 4,241 470.79 0.0282
2017-05-15 2017-03-31 13F KLA-TENCOR COM 482480100 44,630 35,179 4,241 28,168.4659
2017-02-09 2016-12-31 13F KLA-TENCOR COM 482480100 9,451 9,450 945,000.00 743 0.0058
2016-11-07 2016-09-30 13F KLA-TENCOR COM 482480100 1 -7,180 -99.99 0 -100.00
2016-07-22 2016-06-30 13F KLA-TENCOR COM 482480100 7,181 0 0.00 526 0.57 0.0040
2016-05-16 2016-03-31 13F KLA-TENCOR COM 482480100 7,181 2,858 66.11 523 74.33 0.0042
2016-02-08 2015-12-31 13F KLA-TENCOR COM 482480100 4,323 0 0.00 300 38.89 0.0026
2015-11-12 2015-09-30 13F KLA-TENCOR COM 482480100 4,323 0 0.00 216 -11.11 0.0016
2015-08-17 2015-06-30 13F KLA-TENCOR COM 482480100 4,323 0 0.00 243 -3.57 0.0018
2015-04-24 2015-03-31 13F KLA-TENCOR COM 482480100 4,323 0 0.00 252 -17.11 0.0019
2015-02-12 2014-12-31 13F KLA-TENCOR COM 482480100 4,323 1,566 56.80 304 40.09 0.0022
2014-11-10 2014-09-30 13F KLA-TENCOR COM 482480100 2,757 0 0.00 217 8.50 0.0016
2014-08-13 2014-06-30 13F KLA-TENCOR COM 482480100 2,757 979 55.06 200 62.60 0.0014
2014-05-07 2014-03-31 13F KLA-TENCOR COM 482480100 1,778 778 77.80 123 92.19 0.0009
2014-02-04 2013-12-31 13F KLA-TENCOR COM 482480100 1,000 0 0.00 64 4.92 0.0005
2013-11-12 2013-09-30 13F KLA-TENCOR COM 482480100 1,000 0 0.00 61 8.93 0.0006
2013-08-27 2013-06-30 13F KLA-Tencor COM 482480100 1,000 1,000 56 0.0006
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.