Century Aluminum Company
DE ˙ DB ˙ US1564311082
52,38 € ↓ -5,88 (-10,09%)
2026-06-05
DEL PRIS
SecurityDE:EY3 / Century Aluminum Company
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership9,020 shares
Latest Disclosed Value $ 529,370
Advisor Group Holdings, Inc. reports 44.58% decrease in ownership of EY3 / Century Aluminum Company

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 9,020 shares of Century Aluminum Company (DE:EY3) valued at $455,690 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 16,275 shares of Century Aluminum Company. This represents a change in shares of -44.58% during the quarter. The current value of the position is $472,468 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 CENTURY ALUM COM 156431108 9,020 -7,255 -44.58 529 -16.95 0.0005
2026-02-17 2025-12-31 13F CENTURY ALUM COM 156431108 16,275 -44,326 -73.14 638 -56.31 0.0009
2025-11-14 2025-09-30 13F CENTURY ALUM COM 156431108 60,601 43,829 261.32 1,458 382.78 0.0020
2025-09-04 2025-06-30 13F/A-1 CENTURY ALUM COM 156431108 16,772 1,066 6.79 302 3.78 0.0005
2025-08-13 2025-06-30 13F CENTURY ALUM COM 156431108 672 -15,034 12 0.0000
2025-05-12 2025-03-31 13F CENTURY ALUM COM 156431108 15,706 4,887 45.17 291 47.72 0.0006
2025-06-06 2024-12-31 13F/A-1 CENTURY ALUM COM 156431108 10,819 482 4.66 197 17.96 0.0004
2025-02-07 2024-12-31 13F CENTURY ALUM COM 156431108 10,615 278 193 0.0005
2024-11-13 2024-09-30 13F CENTURY ALUM COM 156431108 10,337 -2,268 -17.99 168 -20.85 0.0004
2024-08-13 2024-06-30 13F CENTURY ALUM COM 156431108 12,605 -9,345 -42.57 211 -37.39 0.0005
2024-05-10 2024-03-31 13F CENTURY ALUM COM 156431108 21,950 -9,000 -29.08 338 -10.13 0.0008
2024-02-12 2023-12-31 13F CENTURY ALUM COM 156431108 30,950 -12,905 -29.43 376 19.05 0.0007
2023-11-13 2023-09-30 13F CENTURY ALUM COM 156431108 43,855 7,544 20.78 315 -0.32 0.0005
2023-08-21 2023-06-30 13F/A-1 CENTURY ALUM COM 156431108 36,311 -413 -1.12 317 -13.90 0.0006
2023-08-10 2023-06-30 13F CENTURY ALUM COM 156431108 36,311 -413 317 0.0001
2023-05-12 2023-03-31 13F CENTURY ALUM COM 156431108 36,724 -5,921 -13.88 367 5.16 0.0007
2023-02-10 2022-12-31 13F CENTURY ALUM COM 156431108 42,645 7,081 19.91 349 84.66 0.0007
2022-11-14 2022-09-30 13F CENTURY ALUM COM 156431108 35,564 7,844 28.30 189 -7.35 0.0004
2022-08-10 2022-06-30 13F CENTURY ALUM COM 156431108 27,720 26,763 2,796.55 204 -83.08 0.0004
2022-05-04 2022-03-31 13F CENTURY ALUM COM 156431108 957 -9,735 -91.05 1,206 581.36 0.0023
2022-02-03 2021-12-31 13F CENTURY ALUM COM 156431108 10,692 -6,263 -36.94 177 -22.37 0.0003
2021-11-05 2021-09-30 13F CENTURY ALUM COM 156431108 16,955 3,564 26.61 228 31.79 0.0005
2021-08-02 2021-06-30 13F CENTURY ALUM COM 156431108 13,391 12,701 1,840.72 173 1,341.67 0.0004
2021-05-13 2021-03-31 13F CENTURY ALUM COM 156431108 690 -1,186 -63.22 12 -42.86 0.0000
2021-02-10 2020-12-31 13F CENTURY ALUM COM 156431108 1,876 384 25.74 21 110.00 0.0001
2020-11-12 2020-09-30 13F CENTURY ALUM COM 156431108 1,492 -100 -6.28 10 -9.09 0.0000
2020-08-14 2020-06-30 13F CENTURY ALUM COM 156431108 1,592 -11 -0.69 11 120.00 0.0000
2020-05-18 2020-03-31 13F CENTURY ALUM COM 156431108 1,603 1,603 5 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.