센추리 알루미늄 회사
US ˙ NasdaqGS ˙ US1564311082

SecurityCENX / Century Aluminum Company
InstitutionKBC Group NV
Latest Disclosed Ownership2,199 shares
Latest Disclosed Value $ 129
KBC Group NV ownership in CENX / Century Aluminum Company

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 2,199 shares of Century Aluminum Company (US:CENX) valued at $129,059 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 6, 2024 disclosing 0 shares of Century Aluminum Company. The current value of the position is $132,204 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)
2026-05-07 2026-03-31 13F CENTURY ALUM COM 156431108 2,199 2,199 0 0.0002
2024-11-06 2024-09-30 13F CENTURY ALUM COM 156431108 0 -100.00 0
2024-07-17 2024-06-30 13F CENTURY ALUM COM 156431108 1,767 0 0.00 0 0.0001
2024-05-08 2024-03-31 13F CENTURY ALUM COM 156431108 1,767 -1,479 -45.56 0 0.0001
2024-02-13 2023-12-31 13F CENTURY ALUM COM 156431108 3,246 0 0.00 0 0.0001
2024-02-15 2023-09-30 13F/A-1 CENTURY ALUM COM 156431108 3,246 -701 -17.76 0 0.0001
2023-11-22 2023-09-30 13F CENTURY ALUM COM 156431108 3,947 0 0 0.0001
2024-02-15 2023-06-30 13F/A-1 CENTURY ALUM COM 156431108 3,947 -897 -18.52 0 0.0001
2023-07-28 2023-06-30 13F CENTURY ALUM COM 156431108 3,947 -897 0 0.0001
2024-02-14 2023-03-31 13F/A-1 CENTURY ALUM COM 156431108 4,844 0 0.00 0 0.0002
2023-05-04 2023-03-31 13F CENTURY ALUM COM 156431108 4,844 0 0 0.0002
2024-02-14 2022-12-31 13F/A-1 CENTURY ALUM COM 156431108 4,844 0 0.00 0 0.0002
2023-02-13 2022-12-31 13F CENTURY ALUM COM 156431108 4,844 0 0 0.0000
2024-02-15 2022-09-30 13F/A-1 CENTURY ALUM COM 156431108 4,844 0 0.00 0 0.0001
2022-11-08 2022-09-30 13F CENTURY ALUM COM 156431108 4,844 0 26 0.0001
2024-02-14 2022-06-30 13F/A-1 CENTURY ALUM COM 156431108 4,844 -965 -16.61 0 -100.00 0.0002
2022-07-26 2022-06-30 13F CENTURY ALUM COM 156431108 4,844 -965 36 0.0002
2024-02-14 2022-03-31 13F/A-1 CENTURY ALUM COM 156431108 5,809 5,809 0 0.0006
2022-05-06 2022-03-31 13F CENTURY ALUM COM 156431108 5,809 5,809 153 0.0006
2021-11-10 2021-09-30 13F CENTURY ALUM COM 156431108 0 -6,864 -100.00 0 -100.00
2022-02-15 2021-06-30 13F/A-1 CENTURY ALUM COM 156431108 6,864 0 0.00 88 -27.27 0.0003
2021-08-11 2021-06-30 13F CENTURY ALUM COM 156431108 6,864 0 88 0.0003
2022-02-14 2021-03-31 13F/A-1 CENTURY ALUM COM 156431108 6,864 6,864 121 0.0005
2021-04-26 2021-03-31 13F CENTURY ALUMINUM COM 156431108 6,864 6,864 121 0.0005
2018-08-03 2017-12-31 13F/A-1 CENTURY ALUM COM 156431108 0 -6,730 -100.00 0 -100.00
2017-11-13 2017-09-30 13F CENTURY ALUM COM 156431108 6,730 0 0.00 112 6.67 0.0010
2017-08-04 2017-06-30 13F CENTURY ALUM COM 156431108 6,730 -1,489 -18.12 105 0.96 0.0010
2017-05-10 2017-03-31 13F CENTURY ALUM COM 156431108 8,219 -13,734 -62.56 104 -44.68 0.0009
2017-02-16 2016-12-31 13F CENTURY ALUM COM 156431108 21,953 0 0.00 188 22.88 0.0019
2016-11-03 2016-09-30 13F CENTURY ALUM COM 156431108 21,953 7,666 53.66 153 70.00 0.0018
2016-08-03 2016-06-30 13F CENTURY ALUM COM 156431108 14,287 -8,117 -36.23 90 -43.04 0.0013
2016-05-11 2016-03-31 13F CENTURY ALUM COM 156431108 22,404 -22,437 -50.04 158 -20.20 0.0026
2016-02-11 2015-12-31 13F CENTURY ALUM COM 156431108 44,841 33,567 297.74 198 280.77 0.0036
2015-11-12 2015-09-30 13F CENTURY ALUM COM 156431108 11,274 -202,817 -94.73 52 -97.67 0.0010
2015-12-16 2015-06-30 13F/A-1 CENTURY ALUM COM 156431108 214,091 130,704 156.74 2,233 94.01 0.0287
2015-07-31 2015-06-30 13F CENTURY ALUM COM 156431108 214,091 2,233
2015-12-16 2015-03-31 13F/A-1 CENTURY ALUM COM 156431108 83,387 83,387 173.30 1,151 306.71 0.0146
2015-04-30 2015-03-31 13F CENTURY ALUM COM 156431108 83,387 1,151
2013-11-06 2013-09-30 13F CENTURY ALUM COM 156431108 0 -30,511 -100.00 0 -100.00
2013-07-29 2013-06-30 13F CENTURY ALUM COM 156431108 30,511 30,511 283 0.0052
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.