KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership1,773,150 shares
Latest Disclosed Value $ 2,610,808,112
Morgan Stanley reports 2.27% increase in ownership of KLAC / KLA Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,773,150 shares of KLA Corporation (MX:KLAC) valued at $2,610,808,112 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)
2026-05-15 2026-03-31 13F KLA COM NEW 482480100 1,773,150 39,284 2.27 2,610,808 23.92 0.1573
2026-05-27 2025-12-31 13F/A-1 KLA COM NEW 482480100 1,733,866 13,732 0.80 2,106,788 13.55 0.1258
2026-02-13 2025-12-31 13F KLA COM NEW 482480100 1,733,866 13,732 2,106,788 0.1258
2026-05-27 2025-09-30 13F/A-1 KLA COM NEW 482480100 1,720,134 184,764 12.03 1,855,340 34.90 0.1123
2025-11-14 2025-09-30 13F KLA COM NEW 482480100 1,720,134 184,764 1,855,340 0.1123
2025-08-15 2025-06-30 13F KLA COM NEW 482480100 1,535,370 60,142 4.08 1,375,295 37.14 0.0896
2025-05-15 2025-03-31 13F KLA COM NEW 482480100 1,475,228 4,780 0.33 1,002,862 8.23 0.0717
2025-05-15 2024-12-31 13F/A-1 KLA COM NEW 482480100 1,470,448 88,357 6.39 926,561 -13.43 0.0649
2025-02-14 2024-12-31 13F KLA COM NEW 482480100 1,470,448 88,357 926,561 0.0649
2025-05-14 2024-09-30 13F/A-2 KLA COM NEW 482480100 1,382,091 -4,576 -0.33 1,070,308 -6.39 0.0776
2025-02-14 2024-09-30 13F/A-1 KLA COM NEW 482480100 1,382,091 -4,576 1,070,308 0.0776
2024-11-14 2024-09-30 13F KLA COM NEW 482480100 1,382,091 -4,576 1,070,308 0.0092
2025-05-14 2024-06-30 13F/A-2 KLA COM NEW 482480100 1,386,667 -272,961 -16.45 1,143,323 -1.38 0.0885
2024-10-17 2024-06-30 13F/A-1 KLA COM NEW 482480100 1,386,667 -272,961 1,143,323 0.0885
2024-08-14 2024-06-30 13F KLA COM NEW 482480100 1,386,667 -272,961 1,143,323 0.0885
2024-10-17 2024-03-31 13F/A-2 KLA COM NEW 482480100 1,659,628 436,178 35.65 1,159,368 63.02 0.0930
2024-08-16 2024-03-31 13F/A-1 KLA COM NEW 482480100 1,659,628 436,178 1,159,368 0.0109
2024-05-15 2024-03-31 13F KLA COM NEW 482480100 1,659,628 436,178 1,159,368 0.0930
2024-08-16 2023-12-31 13F/A-1 KLA COM NEW 482480100 1,223,450 -44,361 -3.50 711,193 22.30 0.0627
2024-02-13 2023-12-31 13F KLA COM NEW 482480100 1,223,450 -44,361 711,193 0.0627
2023-11-15 2023-09-30 13F KLA COM NEW 482480100 1,267,811 117,584 10.22 581,496 4.23 0.0591
2023-08-14 2023-06-30 13F KLA COM NEW 482480100 1,150,227 73,228 6.80 557,884 29.77 0.0550
2023-05-15 2023-03-31 13F KLA COM NEW 482480100 1,076,999 -210,901 -16.38 429,907 -11.46 0.0461
2023-02-14 2022-12-31 13F KLA COM NEW 482480100 1,287,900 -894 -0.07 485,578 24.50 0.0551
2022-11-14 2022-09-30 13F KLA COM NEW 482480100 1,288,794 -367,172 -22.17 390,029 -26.18 0.0532
2022-10-27 2022-06-30 13F/A-1 KLA COM NEW 482480100 1,655,966 426,308 34.67 528,386 17.39 0.0686
2022-08-15 2022-06-30 13F KLA COM NEW 482480100 1,655,966 426,308 528,386 0.0138
2022-10-27 2022-03-31 13F/A-1 KLA COM NEW 482480100 1,229,658 294,835 31.54 450,128 11.95 0.0607
2022-05-13 2022-03-31 13F KLA COM NEW 482480100 1,229,658 294,835 450,128 0.0607
2022-02-14 2021-12-31 13F KLA COM NEW 482480100 934,823 -135,731 -12.68 402,076 12.28 0.0496
2021-11-15 2021-09-30 13F KLA COM NEW 482480100 1,070,554 249,580 30.40 358,111 34.54 0.0482
2021-08-23 2021-06-30 13F/A-1 KLA COM NEW 482480100 820,974 141,808 20.88 266,167 18.61 0.0351
2021-08-16 2021-06-30 13F KLA COM NEW 482480100 820,974 141,808 266,167 0.0073
2021-05-17 2021-03-31 13F KLA COM NEW 482480100 679,166 -37,277 -5.20 224,397 20.97 0.0330
2021-02-16 2020-12-31 13F KLA COM NEW 482480100 716,443 326,116 83.55 185,495 145.29 0.0286
2020-11-13 2020-09-30 13F KLA COM NEW 482480100 390,327 93,721 31.60 75,622 31.10 0.0146
2020-08-14 2020-06-30 13F KLA COM NEW 482480100 296,606 61,348 26.08 57,684 70.58 0.0128
2020-05-26 2020-03-31 13F/A-1 KLA COM NEW 482480100 235,258 -229,196 -49.35 33,817 -59.13 0.0092
2020-05-15 2020-03-31 13F KLA COM NEW 482480100 235,258 -229,196 33,817 2,597.8506
2020-02-14 2019-12-31 13F KLA COM NEW 482480100 464,454 263,792 131.46 82,752 158.63 0.0192
2019-11-14 2019-09-30 13F KLA COM NEW 482480100 200,662 -213,781 -51.58 31,996 -34.68 0.0085
2019-08-14 2019-06-30 13F KLA-TENCOR COM 482480100 414,443 58,191 16.33 48,987 15.16 0.0130
2019-05-15 2019-03-31 13F KLA-TENCOR COM 482480100 356,252 112,457 46.13 42,538 94.98 0.0120
2019-02-14 2018-12-31 13F KLA-TENCOR COM 482480100 243,795 -293,938 -54.66 21,817 -60.11 0.0065
2019-04-23 2018-09-30 13F/A-2 KLA-TENCOR COM 482480100 537,733 45,390 9.22 54,692 8.34 0.0137
2018-11-20 2018-09-30 13F/A-1 KLA-TENCOR COM 482480100 537,733 0 54,692 0.0137
2018-11-14 2018-09-30 13F KLA-TENCOR COM 482480100 537,733 45,390 54,692
2019-04-23 2018-06-30 13F/A-1 KLA-TENCOR COM 482480100 492,343 80,375 19.51 50,482 12.41 0.0136
2018-08-14 2018-06-30 13F KLA-TENCOR COM 482480100 492,343 80,375 50,482
2019-04-23 2018-03-31 13F/A-1 KLA-TENCOR COM 482480100 411,968 209,266 103.24 44,910 110.85 0.0125
2018-05-14 2018-03-31 13F KLA-TENCOR COM 482480100 411,968 209,266 44,910
2019-04-23 2017-12-31 13F/A-1 KLA-TENCOR COM 482480100 202,702 -335,583 -62.34 21,299 -62.67 0.0058
2018-02-14 2017-12-31 13F KLA-TENCOR COM 482480100 202,702 -335,583 21,299
2017-11-14 2017-09-30 13F KLA-TENCOR COM 482480100 538,285 -208,406 -27.91 57,057 -16.50 0.0171
2017-08-11 2017-06-30 13F KLA-TENCOR COM 482480100 746,691 501,806 204.91 68,329 193.48 0.0206
2017-05-22 2017-03-31 13F/A-1 KLA-TENCOR COM 482480100 244,885 57,058 30.38 23,282 57.54 0.0072
2017-05-12 2017-03-31 13F KLA-TENCOR COM 482480100 244,885 23,282
2017-02-22 2016-12-31 13F/A-1 KLA-TENCOR COM 482480100 187,827 -3,903,721 -95.41 14,778 -94.82 0.0048
2017-02-13 2016-12-31 13F KLA-TENCOR COM 482480100 187,827 14,778
2016-11-10 2016-09-30 13F KLA-TENCOR COM 482480100 4,091,548 -845,404 -17.12 285,220 -21.13 0.0974
2016-08-12 2016-06-30 13F KLA-TENCOR COM 482480100 4,936,952 1,424,333 40.55 361,632 41.40 0.1306
2016-05-12 2016-03-31 13F KLA-TENCOR COM 482480100 3,512,619 225,321 6.85 255,754 12.19 0.0984
2016-02-09 2015-12-31 13F KLA-TENCOR COM 482480100 3,287,298 3,117,674 1,837.99 227,974 2,587.42 0.0825
2016-02-08 2015-09-30 13F/A-1 KLA-TENCOR COM 482480100 169,624 -28,364 -14.33 8,483 -23.78 0.0031
2015-11-09 2015-09-30 13F KLA-TENCOR COM 482480100 169,624 8,483
2015-08-12 2015-06-30 13F KLA-TENCOR COM 482480100 197,988 -96,672 -32.81 11,130 -35.19 0.0039
2015-05-14 2015-03-31 13F KLA-TENCOR COM 482480100 294,660 52,777 21.82 17,174 0.98 0.0063
2015-02-13 2014-12-31 13F KLA-TENCOR COM 482480100 241,883 55,642 29.88 17,008 15.93 0.0062
2014-12-16 2014-09-30 13F/A-1 KLA-TENCOR COM 482480100 186,241 -42,732 -18.66 14,671 -7.33 0.0056
2014-11-14 2014-09-30 13F KLA-TENCOR COM 482480100 186,241 14,671
2014-05-13 2014-03-31 13F KLA-TENCOR COM 482480100 228,973 -137,401 -37.50 15,832 -32.96 0.0066
2014-02-13 2013-12-31 13F KLA-TENCOR COM 482480100 366,374 31,132 9.29 23,616 15.78 0.0100
2013-11-13 2013-09-30 13F KLA-TENCOR CORP COM ST COM 482480100 335,242 51,219 18.03 20,398 28.86 0.0096
2013-08-08 2013-06-30 13F KLA-TENCOR CORP COM ST COM 482480100 284,023 284,023 15,829 0.0080
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.