Kaiser Aluminum Corporation
US ˙ NasdaqGS ˙ US4830077040

SecurityKALU / Kaiser Aluminum Corporation
InstitutionBessemer Group Inc
Latest Disclosed Ownership29,915 shares
Latest Disclosed Value $ 3,605
Bessemer Group Inc reports 0.18% decrease in ownership of KALU / Kaiser Aluminum Corporation

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 29,915 shares of Kaiser Aluminum Corporation (US:KALU) valued at $3,605,057 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 29,969 shares of Kaiser Aluminum Corporation. This represents a change in shares of -0.18% during the quarter. The current value of the position is $5,291,964 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)
2026-05-06 2026-03-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 29,915 -54 -0.18 4 0.00 0.0057
2026-02-05 2025-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 29,969 29,903 45,307.58 3 0.0053
2025-11-05 2025-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 66 35 112.90 0 0.0000
2025-08-01 2025-06-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 31 -44 -58.67 0 0.0000
2025-04-23 2025-03-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 75 44 141.94 0 0.0000
2025-02-13 2024-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 31 0 0.00 0 0.0000
2024-11-12 2024-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 31 31 0 0.0000
2024-08-13 2024-06-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -45 -100.00 0 0.0000
2024-08-13 2024-03-31 13F/A-1 KAISER ALUMINUM CO PAR 1 SC 483007704 45 45 0 0.0000
2024-05-13 2024-03-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 45 45 0 0.0000
2024-02-09 2023-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -18 -100.00 0 0.0000
2023-11-13 2023-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 18 0 0.00 0 0.0000
2023-08-10 2023-06-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 18 18 0 0.0000
2023-02-13 2022-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -111 -100.00 0 -100.00
2022-11-09 2022-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 111 111 7 0.0000
2021-02-09 2020-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -22 -100.00 0 -100.00
2020-11-12 2020-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 22 22 1 0.0000
2020-02-04 2019-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -16 -100.00 0 -100.00
2019-11-07 2019-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 16 16 2 0.0000
2018-05-10 2018-03-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -115 -100.00 0 -100.00
2018-01-30 2017-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 115 115 12 0.0000
2017-05-12 2017-03-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -115 -100.00 0 -100.00
2017-02-07 2016-12-31 13F KAISER ALUMINUM CO PAR 1 SC 483007704 115 115 9 0.0000
2016-05-11 2016-03-31 13F KAISER ALUMINUM SC 483007704 0 0 0 0.0000
2016-02-12 2015-12-31 13F KAISER ALUMINUM SC 483007704 0 0 0 0.0000
2015-11-16 2015-09-30 13F KAISER ALUMINUM SC 483007704 0 -9,755 -100.00 0 -100.00
2015-08-14 2015-06-30 13F KAISER ALUMINUM SC 483007704 9,755 0 0.00 810 8.00 0.0042
2015-06-18 2015-03-31 13F/A-1 KAISER ALUMINUM SC 483007704 9,755 1,855 23.48 750 32.98 0.0038
2015-05-14 2015-03-31 13F KAISER ALUMINUM SC 483007704 9,755 750
2015-02-17 2014-12-31 13F KAISER ALUMINUM CORPORAT SC 483007704 7,900 7,900 0.00 564 0.0030
2014-11-13 2014-09-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 0 -48 -100.00 0 -100.00
2014-08-13 2014-06-30 13F KAISER ALUMINUM CO PAR 1 SC 483007704 48 48 4 0.0000
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.