KLA 공사
US ˙ NasdaqGS ˙ US4824801009

SecurityKLAC / KLA Corporation
InstitutionFirst Manhattan Co
Latest Disclosed Ownership4,383 shares
Latest Disclosed Value $ 6,453,573
First Manhattan Co reports 0.07% decrease in ownership of KLAC / KLA Corporation

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 4,383 shares of KLA Corporation (US:KLAC) valued at $6,453,573 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,386 shares of KLA Corporation. This represents a change in shares of -0.07% during the quarter. The current value of the position is $9,340,611 USD.

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 4,383 -3 -0.07 6,454 21.09 0.0179
2026-02-17 2025-12-31 13F KLA COM NEW 482480100 4,386 -459 -9.47 5,329 1.99 0.0140
2025-11-14 2025-09-30 13F KLA COM NEW 482480100 4,845 -3 -0.06 5,226 20.34 0.0138
2025-08-14 2025-06-30 13F KLA COM NEW 482480100 4,848 13 0.27 4,343 32.14 0.0123
2025-05-15 2025-03-31 13F KLA COM NEW 482480100 4,835 600 14.17 3,287 23.16 0.0096
2025-02-14 2024-12-31 13F KLA COM NEW 482480100 4,235 2,640 165.52 2,669 116.03 0.0078
2024-11-14 2024-09-30 13F KLA COM NEW 482480100 1,595 -3 -0.19 1,235 -6.23 0.0037
2024-08-15 2024-06-30 13F/A-1 KLA COM NEW 482480100 1,598 -8 -0.50 1,318 17.38 0.0042
2024-08-14 2024-06-30 13F KLA COM NEW 482480100 1,598 -8 1,318 0.0042
2024-05-15 2024-03-31 13F KLA COM NEW 482480100 1,606 43 2.75 1,123 23.43 0.0036
2024-02-13 2023-12-31 13F KLA COM NEW 482480100 1,563 -49 -3.04 909 23.00 0.0032
2023-11-14 2023-09-30 13F KLA COM NEW 482480100 1,612 1,517 1,596.84 739 1,506.52 0.0027
2023-08-14 2023-06-30 13F KLA COM NEW 482480100 95 0 0.00 46 24.32 0.0002
2023-05-15 2023-03-31 13F KLA COM NEW 482480100 95 0 0.00 38 5.71 0.0001
2023-02-14 2022-12-31 13F KLA COM NEW 482480100 95 45 90.00 36 133.33 0.0001
2022-11-14 2022-09-30 13F KLA COM NEW 482480100 50 0 0.00 15 0.00 0.0001
2022-08-15 2022-06-30 13F KLA COM NEW 482480100 50 0 0.00 15 -16.67 0.0001
2022-05-16 2022-03-31 13F KLA COM NEW 482480100 50 0 0.00 18 -14.29 0.0001
2022-02-14 2021-12-31 13F KLA COM NEW 482480100 50 0 0.00 21 31.25 0.0001
2021-11-15 2021-09-30 13F KLA COM NEW 482480100 50 -34 -40.48 16 -40.74 0.0001
2021-08-16 2021-06-30 13F KLA COM NEW 482480100 84 0 0.00 27 0.00 0.0001
2021-05-14 2021-03-31 13F KLA COM NEW 482480100 84 0 0.00 27 28.57 0.0001
2021-02-16 2020-12-31 13F KLA COM NEW 482480100 84 0 0.00 21 31.25 0.0001
2020-11-12 2020-09-30 13F KLA COMMON USD0.001 482480100 84 -8 -8.70 16 -5.88 0.0001
2020-08-14 2020-06-30 13F KLA COMMON USD0.001 482480100 92 8 9.52 17 41.67 0.0001
2020-05-06 2020-03-31 13F KLA COMMON USD0.001 482480100 84 0 0.00 12 -14.29 0.0001
2020-02-13 2019-12-31 13F KLA COMMON USD0.001 482480100 84 0 0.00 14 7.69 0.0001
2019-11-13 2019-09-30 13F KLA COMMON USD0.001 482480100 84 84 13 0.0001
2018-10-15 2018-09-30 13F KLA-TENCOR COMMON 482480100 0 -375 -100.00 0 -100.00
2018-08-01 2018-06-30 13F KLA-TENCOR COMMON 482480100 375 -100 -21.05 38 -25.49 0.0002
2018-04-20 2018-03-31 13F KLA-TENCOR COMMON 482480100 475 -416 -46.69 51 -45.16 0.0003
2018-01-22 2017-12-31 13F KLA-TENCOR COMMON 482480100 891 0 0.00 93 -1.06 0.0005
2017-10-25 2017-09-30 13F KLA-TENCOR COMMON 482480100 891 0 0.00 94 16.05 0.0005
2017-08-10 2017-06-30 13F/A-2 KLA-TENCOR COMMON 482480100 891 0 0.00 81 -3.57 0.0005
2017-08-01 2017-06-30 13F/A-1 KLA-TENCOR COMMON 482480100 891 0 81 0.0005
2017-07-28 2017-06-30 13F KLA-TENCOR COMMON 482480100 891 0 81
2017-04-25 2017-03-31 13F/A-1 KLA-TENCOR COMMON 482480100 891 0 0.00 84 20.00 0.0005
2017-04-24 2017-03-31 13F KLA-TENCOR COMMON 482480100 891 62
2017-01-25 2016-12-31 13F KLA-TENCOR COMMON 482480100 891 0 0.00 70 12.90 0.0004
2016-10-20 2016-09-30 13F KLA-TENCOR COMMON 482480100 891 0 0.00 62 -4.62 0.0004
2016-07-14 2016-06-30 13F KLA-TENCOR COMMON 482480100 891 0 0.00 65 1.56 0.0004
2016-04-22 2016-03-31 13F KLA-TENCOR COMMON 482480100 891 0 0.00 64 4.92 0.0004
2016-01-20 2015-12-31 13F KLA-TENCOR COMMON 482480100 891 0 0.00 61 38.64 0.0004
2015-10-26 2015-09-30 13F KLA-TENCOR COMMON 482480100 891 0 0.00 44 -12.00 0.0003
2015-07-17 2015-06-30 13F KLA-TENCOR COMMON 482480100 891 0 0.00 50 -1.96 0.0003
2015-04-30 2015-03-31 13F KLA-TENCOR COMMON 482480100 891 0 0.00 51 -17.74 0.0003
2015-01-20 2014-12-31 13F KLA-TENCOR COMMON 482480100 891 -84 -8.62 62 -18.42 0.0004
2014-10-23 2014-09-30 13F KLA-TENCOR COMMON 482480100 975 0 0.00 76 8.57 0.0004
2014-08-14 2014-06-30 13F/A-1 KLA-TENCOR COMMON 482480100 975 0 0.00 70 4.48 0.0004
2014-05-16 2014-03-31 13F KLA-TENCOR COMMON 482480100 975 0 0.00 67 8.06 0.0004
2014-02-04 2013-12-31 13F KLA-TENCOR COMMON 482480100 975 0 0.00 62 5.08 0.0004
2013-10-29 2013-09-30 13F KLA-TENCOR COMMON 482480100 975 0 0.00 59 5.36 0.0004
2013-08-13 2013-06-30 13F KLA-TENCOR COMMON 482480100 975 975 56 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.