BlackRock, Inc. ownership in KLU1 / Kaiser Aluminum Corporation

Kaiser Aluminum Corporation

DE ˙ DB ˙ US4830077040

158,00 € ↑1,00 (0,64%)

2026-06-05
DEL PRIS

Security	DE:KLU1 / Kaiser Aluminum Corporation
Institution	BlackRock, Inc.
Latest Disclosed Ownership	2,401,692 shares
Ownership	14.80%

2026-04-24 - BlackRock, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,401,692 shares of Kaiser Aluminum Corporation (DE:KLU1). This represents 14.8 percent ownership of the company. In their previous filing dated 2025-04-29 , BlackRock, Inc. had reported owning 2,590,775 shares, indicating a decrease of -7.30 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2026-04-24	2026-04-24	13G/A	2,590,775	2,401,692	-7.30	14.80	-8.07
2025-04-29	2025-04-29	13G/A	3,114,302	2,590,775	-16.81	16.10	-17.01
2025-02-05	2025-02-05	13G/A	2,914,662	3,114,302	6.85	19.40	6.59
2024-01-19	2024-01-19	13G/A	2,645,626	2,914,662	10.17	18.20	9.64
2023-01-26	2023-01-26	13G/A	2,645,626	2,645,626	0.00	16.60	0.00
2023-01-20	2023-01-20	13G/A	2,595,407	2,645,626	1.93	16.60	1.22
2022-01-27	2022-01-27	13G/A	2,595,407	2,595,407	0.00	16.40	0.00
2022-01-25	2022-01-25	13G/A	2,456,642	2,595,407	5.65	16.40	5.81
2021-01-25	2021-01-25	13G	2,449,306	2,456,642	0.30	15.50	0.65
2020-02-04	2020-02-04	13G/A	2,345,611	2,449,306	4.42	15.40	8.45
2019-01-31	2019-01-31	13G/A	2,159,759	2,345,611	8.61	14.20	10.94
2018-01-19	2018-01-19	13G/A	2,099,848	2,159,759	2.85	12.80	9.40
2017-01-12	2017-01-12	13G/A	1,983,309	2,099,848	5.88	11.70	5.41
2016-12-09	2016-12-09	13G/A	1,685,118	1,983,309	17.70	11.10	16.84
2016-01-26	2016-01-26	13G/A	1,741,623	1,685,118	-3.24	9.50	-6.86
2015-06-10	2015-06-10	13G/A		1,741,623		10.20
2015-01-22	2015-01-22	13G/A		1,547,045		8.70
2014-02-10	2014-02-10	13G/A		1,750,876		9.30
2013-02-08	2013-02-08	13G/A		1,485,442		7.69
2012-02-13	2012-02-13	13G/A		1,429,325		7.32

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	KAISER ALUMINIUM	COM PAR $0.01	483007704	2,842,894	-154,297	-5.15	342,597	-0.48	0.0004
2026-02-12	2025-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,997,191	-29,257	-0.97	344,257	47.42	0.0058
2025-11-12	2025-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	3,026,448	-9,814	-0.32	233,521	-3.74	0.0041
2025-08-12	2025-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	3,036,262	66,951	2.25	242,597	34.78	0.0046
2025-05-02	2025-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,969,311	-144,991	-4.66	180,000	-17.75	0.0038
2025-02-07	2024-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	3,114,302	28,701	0.93	218,842	-2.20	0.0044
2024-11-13	2024-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	3,085,601	86,320	2.88	223,768	-15.12	0.0047
2024-08-13	2024-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,999,281	93,524	3.22	263,637	1.53	0.0060
2024-05-10	2024-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,905,757	-8,905	-0.31	259,658	25.14	0.0060
2024-02-13	2023-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,914,662	217,341	8.06	207,495	2.21	0.0053
2023-11-13	2023-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,697,321	-37,580	-1.37	203,000	3.61	0.0058
2023-08-11	2023-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,734,901	104,632	3.98	195,928	-0.19	0.0054
2023-05-12	2023-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,630,269	-15,357	-0.58	196,297	-2.32	0.0058
2023-02-13	2022-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,645,626	23,752	0.91	200,962	24.93	0.0063
2022-11-14	2022-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,621,874	-32,774	-1.23	160,855	-23.39	0.0055
2022-08-12	2022-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,654,648	37,074	1.42	209,958	-14.81	0.0067
2022-05-12	2022-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,617,574	22,167	0.85	246,471	1.09	0.0066
2022-02-10	2021-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,595,407	89,995	3.59	243,812	-10.69	0.0062
2021-11-09	2021-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,505,412	-58,308	-2.27	272,990	-13.77	0.0076
2021-08-11	2021-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,563,720	-22,432	-0.87	316,596	10.79	0.0088
2021-05-07	2021-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,586,152	129,510	5.27	285,771	17.62	0.0084
2021-02-05	2020-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,456,642	117,253	5.01	242,962	93.80	0.0078
2020-11-06	2020-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,339,389	-48,184	-2.02	125,368	-28.68	0.0046
2020-08-14	2020-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,387,573	12,387	0.52	175,774	6.82	0.0070
2020-05-01	2020-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,375,186	-74,120	-3.03	164,553	-39.41	0.0080
2020-02-13	2019-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,449,306	70,943	2.98	271,604	15.39	0.0104
2019-11-08	2019-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,378,363	-107,994	-4.34	235,387	-3.01	0.0099
2019-08-22	2019-06-30	13F/A-1	KAISER ALUMINUM	COM PAR $0.01	483007704	2,486,357	19,066	0.77	242,693	-6.08	0.0104
2019-08-13	2019-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,486,357	19,066		242,693
2019-05-09	2019-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,467,291	121,680	5.19	258,401	23.38	0.0115
2019-02-08	2018-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,345,611	13,081	0.56	209,440	-17.67	0.0106
2018-11-09	2018-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,332,530	101,969	4.57	254,385	9.54	0.0110
2018-08-09	2018-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,230,561	46,841	2.15	232,223	5.39	0.0107
2018-05-09	2018-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,183,720	30,723	1.43	220,337	-4.22	0.0105
2018-02-09	2017-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,152,997	63,184	3.02	230,049	6.73	0.0109
2017-11-14	2017-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,089,813	-6,033	-0.29	215,544	16.18	0.0109
2017-08-10	2017-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,095,846	-78,847	-3.63	185,525	6.77	0.0098
2017-05-12	2017-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	2,174,693	2,157,364	12,449.44	173,757	12,799.55	0.0095
2017-02-10	2016-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	17,329	4,545	35.55	1,347	21.79	0.0019
2016-11-08	2016-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	12,784	0	0.00	1,106	-4.33	0.0016
2016-08-10	2016-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	12,784	-483	-3.64	1,156	3.03	0.0017
2016-05-10	2016-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	13,267	-8,060	-37.79	1,122	-37.11	0.0018
2016-02-11	2015-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	21,327	-12,918	-37.72	1,784	-35.10	0.0026
2015-11-13	2015-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	34,245	-17,130	-33.34	2,749	-35.61	0.0043
2015-08-07	2015-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	51,375	33,235	183.21	4,269	205.80	0.0063
2015-05-13	2015-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	18,140	2,766	17.99	1,396	27.02	0.0019
2015-02-09	2014-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	15,374	6,444	72.16	1,099	61.62	0.0016
2014-10-29	2014-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	8,930	1,368	18.09	680	23.64	0.0010
2014-08-06	2014-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	7,562	1,561	26.01	550	28.21	0.0008
2014-05-02	2014-03-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	6,001	-2,935	-32.84	429	-31.69	0.0007
2014-02-12	2013-12-31	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	8,936	3,366	60.43	628	58.19	0.0010
2013-11-12	2013-09-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	5,570	815	17.14	397	34.58	0.0007
2013-08-13	2013-06-30	13F	KAISER ALUMINUM	COM PAR $0.01	483007704	4,755	4,755		295		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.