KLA Corporation
MX ˙ BMV ˙ US4824801009
SecurityMX:KLAC / KLA Corporation
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership886,742 shares
Latest Disclosed Value $ 1,305,882,079
Ameriprise Financial Inc ownership in KLAC / KLA Corporation

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 886,742 shares of KLA Corporation (MX:KLAC) valued at $1,305,882,079 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 920,075 shares of KLA Corporation. This represents a change in shares of -3.62% during the quarter.

Ameriprise Financial Inc has a history of taking positions in derivatives of the underlying security (KLAC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 1,300 of underlying shares valued at $1,914,133 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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 .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:KLAC / KLA Corporation Historical Put/Call Ratio
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 482480100 886,742 -33,333 -3.62 1,305,882 17.11 0.0560
2026-02-17 2025-12-31 13F KLA COM 482480100 920,075 -44,283 -4.59 1,115,095 7.77 0.2520
2025-11-14 2025-09-30 13F KLA COM 482480100 964,358 3,337 0.35 1,034,707 20.85 0.2377
2025-08-14 2025-06-30 13F KLA COM 482480100 961,021 -47,753 -4.73 856,190 25.50 0.2110
2025-05-14 2025-03-31 13F KLA COM 482480100 1,008,774 -75,864 -6.99 682,230 0.28 0.1842
2025-02-14 2024-12-31 13F KLA COM 482480100 1,084,638 -310,550 -22.26 680,316 -36.80 0.1746
2024-11-14 2024-09-30 13F KLA COM 482480100 1,395,188 -26,154 -1.84 1,076,454 -7.77 0.2761
2024-08-14 2024-06-30 13F KLA COM 482480100 1,421,342 -304,463 -17.64 1,167,151 -2.83 0.3158
2024-05-15 2024-03-31 13F KLA COM 482480100 1,725,805 -186,951 -9.77 1,201,177 8.46 0.3306
2024-02-14 2023-12-31 13F KLA COM 482480100 1,912,756 -51,497 -2.62 1,107,446 23.55 0.3316
2023-11-14 2023-09-30 13F KLA COM 482480100 1,964,253 -146,383 -6.94 896,387 -12.01 0.2943
2023-08-14 2023-06-30 13F KLA COM 482480100 2,110,636 -151,484 -6.70 1,018,693 13.34 0.3194
2023-05-22 2023-03-31 13F/A-1 KLA COM 482480100 2,262,120 -95,760 -4.06 898,834 1.56 0.2948
2023-05-15 2023-03-31 13F KBR CONV BND 482480100 2,262,120 -95,760 898,834 0.0544
2023-02-14 2022-12-31 13F KLA COM 482480100 2,357,880 160,598 7.31 885,065 33.75 0.3034
2022-11-14 2022-09-30 13F KLA COM 482480100 2,197,282 -307,180 -12.27 661,711 -16.68 0.2447
2022-08-15 2022-06-30 13F KLA COM 482480100 2,504,462 58,793 2.40 794,216 -10.76 0.2770
2022-05-16 2022-03-31 13F KLA COM 482480100 2,445,669 263,055 12.05 889,951 -4.78 0.2626
2022-02-14 2021-12-31 13F KLA COM 482480100 2,182,614 -237,507 -9.81 934,608 15.44 0.2585
2021-11-15 2021-09-30 13F KLA COM 482480100 2,420,121 17,397 0.72 809,589 3.93 0.2587
2021-08-16 2021-06-30 13F KLA COM 482480100 2,402,724 80,555 3.47 778,996 1.54 0.2409
2021-05-17 2021-03-31 13F KLA COM 482480100 2,322,169 -344,672 -12.92 767,212 11.11 0.2550
2021-02-12 2020-12-31 13F KLA COM 482480100 2,666,841 -91,160 -3.31 690,508 29.23 0.2449
2020-11-16 2020-09-30 13F KLA COM 482480100 2,758,001 151,852 5.83 534,332 5.42 0.2173
2020-08-14 2020-06-30 13F KLA COM 482480100 2,606,149 603,770 30.15 506,865 76.11 0.2171
2020-05-15 2020-03-31 13F KLA COM 482480100 2,002,379 106,211 5.60 287,816 -14.80 0.1511
2020-02-14 2019-12-31 13F KLA COM 482480100 1,896,168 29,276 1.57 337,825 13.49 0.1404
2019-11-14 2019-09-30 13F KLA COM 482480100 1,866,892 28,523 1.55 297,667 36.99 0.1334
2019-08-14 2019-06-30 13F KLA-TENCOR COM 482480100 1,838,369 150,950 8.95 217,292 6.91 0.0973
2019-05-15 2019-03-31 13F KLA-TENCOR COM 482480100 1,687,419 521,464 44.72 203,243 94.71 0.0935
2019-02-14 2018-12-31 13F KLA-TENCOR COM 482480100 1,165,955 118,058 11.27 104,382 -2.05 0.0522
2018-11-14 2018-09-30 13F KLA-TENCOR CORP COM COM 482480100 1,047,897 -185,521 -15.04 106,565 -15.73 0.0373
2018-08-14 2018-06-30 13F KLA-TENCOR COM 482480100 1,233,418 170,403 16.03 126,461 9.13 0.0560
2018-05-14 2018-03-31 13F KLA-TENCOR COM 482480100 1,063,015 12,542 1.19 115,879 4.99 0.0524
2018-02-12 2017-12-31 13F KLA-TENCOR COM 482480100 1,050,473 -70,280 -6.27 110,373 -7.09 0.0503
2017-11-07 2017-09-30 13F KLA-TENCOR COM 482480100 1,120,753 885,147 375.69 118,799 450.63 0.0565
2017-08-10 2017-06-30 13F KLA-TENCOR COM 482480100 235,606 -59,490 -20.16 21,575 -23.10 0.0108
2017-05-05 2017-03-31 13F KLA-TENCOR COM 482480100 295,096 -855,139 -74.34 28,057 -69.00 0.0145
2017-02-03 2016-12-31 13F KLA-TENCOR COM 482480100 1,150,235 -100,647 -8.05 90,499 3.79 0.0494
2016-11-08 2016-09-30 13F KLA-TENCOR COM 482480100 1,250,882 495,548 65.61 87,197 57.63 0.0488
2016-08-08 2016-06-30 13F KLA-TENCOR COM 482480100 755,334 -841,302 -52.69 55,319 -52.41 0.0324
2016-05-12 2016-03-31 13F KLA-TENCOR COM 482480100 1,596,636 268,974 20.26 116,239 26.25 0.0694
2016-02-11 2015-12-31 13F KLA-TENCOR COM 482480100 1,327,662 223,273 20.22 92,071 66.78 0.0540
2015-11-12 2015-09-30 13F KLA-TENCOR COM 482480100 1,104,389 867,029 365.28 55,204 313.82 0.0342
2015-08-13 2015-06-30 13F KLA-TENCOR COM 482480100 237,360 -122,530 -34.05 13,340 -36.40 0.0076
2015-05-14 2015-03-31 13F KLA-TENCOR COM 482480100 359,890 -2,142,066 -85.62 20,975 -88.10 0.0120
2015-02-13 2014-12-31 13F KLA-TENCOR COM 482480100 2,501,956 -1,295,655 -34.12 176,225 -41.10 0.1027
2014-11-14 2014-09-30 13F KLA-TENCOR COM 482480100 3,797,611 -2,289,981 -37.62 299,174 -32.34 0.1800
2014-08-13 2014-06-30 13F KLA-TENCOR COM 482480100 6,087,592 65,888 1.09 442,204 6.21 0.2609
2014-05-14 2014-03-31 13F KLA-TENCOR COM 482480100 6,021,704 -122,065 -1.99 416,337 5.13 0.2500
2014-02-14 2013-12-31 13F KLA-TENCOR COM 482480100 6,143,769 -182,229 -2.88 396,026 2.88 0.2399
2013-11-14 2013-09-30 13F KLA-TENCOR COM 482480100 6,325,998 -186,949 -2.87 384,924 6.05 0.2525
2013-08-14 2013-06-30 13F KLA-TENCOR COM 482480100 6,512,947 6,512,947 362,963 0.2513
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-17 2025-12-31 13F KLA OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F KLA OPT Call 2,000 2,157 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F KLA OPT Put 1,300 1,914 n/a n/a n/a
2016-05-12 2016-03-31 13F KLA-TENCOR OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-11 2015-12-31 13F KLA-TENCOR OPT Put 16,500 1,144 n/a n/a n/a
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.