Korea Investment CORP reports 3.16% decrease in ownership of KLAC / KLA Corporation

KLA Corporation

MX ˙ BMV ˙ US4824801009

Security	MX:KLAC / KLA Corporation
Institution	Korea Investment CORP
Latest Disclosed Ownership	94,663 shares
Latest Disclosed Value	$ 139,382,748

On May 13, 2026 - Korea Investment CORP filed a 13F-HR form disclosing ownership of 94,663 shares of KLA Corporation (MX:KLAC) valued at $139,382,748 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 97,749 shares of KLA Corporation. This represents a change in shares of -3.16% 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.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-13	2026-03-31	13F	KLA	COM NEW	482480100	94,663	-3,086	-3.16	139,383	17.35	0.2888
2026-02-13	2025-12-31	13F	KLA	COM NEW	482480100	97,749	-3,602	-3.55	118,773	8.65	0.2338
2025-11-13	2025-09-30	13F	KLA	COM NEW	482480100	101,351	2,842	2.89	109,317	23.89	0.2248
2025-08-13	2025-06-30	13F	KLA	COM NEW	482480100	98,509	-6,024	-5.76	88,238	24.17	0.1963
2025-05-14	2025-03-31	13F	KLA	COM NEW	482480100	104,533	-2,746	-2.56	71,062	5.12	0.1722
2025-02-12	2024-12-31	13F	KLA	COM NEW	482480100	107,279	-761	-0.70	67,599	-19.21	0.1603
2024-11-13	2024-09-30	13F	KLA	COM NEW	482480100	108,040	-12,855	-10.63	83,667	-16.06	0.1986
2024-08-13	2024-06-30	13F	KLA	COM NEW	482480100	120,895	-44,650	-26.97	99,679	-13.81	0.2511
2024-05-14	2024-03-31	13F	KLA	COM NEW	482480100	165,545	-78,452	-32.15	115,645	-18.47	0.2935
2024-02-13	2023-12-31	13F	KLA	COM NEW	482480100	243,997	-16,791	-6.44	141,835	18.58	0.3724
2023-11-13	2023-09-30	13F	KLA	COM NEW	482480100	260,788	-5,922	-2.22	119,613	-7.53	0.3523
2023-08-11	2023-06-30	13F	KLA	COM NEW	482480100	266,710	-5,759	-2.11	129,360	18.94	0.3635
2023-05-12	2023-03-31	13F	KLA	COM NEW	482480100	272,469	21,286	8.47	108,761	14.84	0.3167
2023-02-13	2022-12-31	13F	KLA	COM NEW	482480100	251,183	51,888	26.04	94,704	57.02	0.2975
2022-11-10	2022-09-30	13F	KLA	COM NEW	482480100	199,295	-6,676	-3.24	60,313	-8.23	0.1857
2022-08-12	2022-06-30	13F	KLA	COM NEW	482480100	205,971	14,223	7.42	65,721	-6.37	0.2009
2022-05-13	2022-03-31	13F	KLA	COM NEW	482480100	191,748	83,748	77.54	70,191	51.10	0.1736
2022-02-09	2021-12-31	13F	KLA	COM NEW	482480100	108,000	62,900	139.47	46,452	207.91	0.1207
2021-11-12	2021-09-30	13F	KLA	COM NEW	482480100	45,100	-74,300	-62.23	15,086	-61.03	0.0450
2021-08-12	2021-06-30	13F	KLA	COM NEW	482480100	119,400	84,900	246.09	38,711	239.60	0.1109
2021-05-13	2021-03-31	13F	KLA	COM NEW	482480100	34,500	-199,137	-85.23	11,399	-81.16	0.0360
2021-02-10	2020-12-31	13F	KLA	COM NEW	482480100	233,637	-115,963	-33.17	60,491	-10.69	0.1817
2020-11-12	2020-09-30	13F	KLA	COM NEW	482480100	349,600	6,600	1.92	67,732	1.54	0.2393
2020-08-12	2020-06-30	13F	KLA	COM NEW	482480100	343,000	-3,200	-0.92	66,707	34.05	0.2451
2020-05-14	2020-03-31	13F	KLA	COM NEW	482480100	346,200	50,100	16.92	49,763	-5.67	0.2184
2020-02-11	2019-12-31	13F	KLA	COM NEW	482480100	296,100	23,700	8.70	52,756	21.46	0.1923
2019-11-12	2019-09-30	13F	KLA	COM NEW	482480100	272,400	50,100	22.54	43,434	65.30	0.1836
2019-08-12	2019-06-30	13F	KLA-TENCOR	COM	482480100	222,300	4,100	1.88	26,276	0.85	0.1130
2019-05-15	2019-03-31	13F	KLA-TENCOR	COM	482480100	218,200	37,874	21.00	26,055	61.46	0.1173
2019-02-13	2018-12-31	13F	KLA-TENCOR	COM	482480100	180,326	-32,800	-15.39	16,137	-25.56	0.0877
2018-11-13	2018-09-30	13F	KLA-TENCOR	COM	482480100	213,126	-91,925	-30.13	21,677	-30.69	0.1000
2018-08-13	2018-06-30	13F	KLA-TENCOR	COM	482480100	305,051	-21,400	-6.56	31,277	-12.11	0.1425
2018-05-09	2018-03-31	13F	KLA-TENCOR	COM	482480100	326,451	217,500	199.63	35,586	210.88	0.1656
2018-02-12	2017-12-31	13F	KLA-TENCOR	COM	482480100	108,951	-32,500	-22.98	11,447	-23.66	0.0521
2017-10-25	2017-09-30	13F	KLA-TENCOR	COM	482480100	141,451	25,000	21.47	14,994	40.71	0.0693
2017-07-31	2017-06-30	13F	KLA-TENCOR	COM	482480100	116,451	-29,647	-20.29	10,656	-23.28	0.0497
2017-04-25	2017-03-31	13F	KLA-TENCOR	COM	482480100	146,098	-19,186	-11.61	13,890	6.81	0.0689
2017-02-13	2016-12-31	13F	KLA-TENCOR	COM	482480100	165,284	63,984	63.16	13,005	84.15	0.0625
2016-11-09	2016-09-30	13F	KLA-TENCOR	COM	482480100	101,300	11,500	12.81	7,062	7.36	0.0376
2016-08-12	2016-06-30	13F	KLA-TENCOR	COM	482480100	89,800	24,200	36.89	6,578	37.73	0.0392
2016-05-12	2016-03-31	13F	KLA-TENCOR	COM	482480100	65,600	22,700	52.91	4,776	60.54	0.0349
2016-02-01	2015-12-31	13F	KLA-TENCOR	COM	482480100	42,900	17,500	68.90	2,975	134.25	0.0207
2015-11-12	2015-09-30	13F	KLA-TENCOR	COM	482480100	25,400	25,400	0.00	1,270		0.0101
2014-11-14	2014-09-30	13F	KLA-TENCOR	COM	482480100	0	-31,600	-100.00	0	-100.00
2014-08-14	2014-06-30	13F	KLA-TENCOR	COM	482480100	31,600	-8,800	-21.78	2,295	-17.83	0.0191
2014-05-14	2014-03-31	13F	KLA-TENCOR	COM	482480100	40,400	-90,300	-69.09	2,793	-66.85	0.0247
2014-02-06	2013-12-31	13F	KLA-TENCOR	COM	482480100	130,700	-23,300	-15.13	8,425	-10.09	0.0797
2013-11-07	2013-09-30	13F/A-1	KLA-TENCOR	COM	482480100	154,000	33,500	27.80	9,371	39.55	0.0996
2013-11-05	2013-09-30	13F	KLA-TENCOR	COM	482480100	893,800			54,388
2013-08-08	2013-06-30	13F	KLA-TENCOR	COM	482480100	120,500	120,500		6,715		0.0805

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.