Century Aluminum Company
DE ˙ DB ˙ US1564311082
€ 52,38 ↓ -5.88 (-10.09%)
2026-06-05
PREÇO DA AÇÃO
SecurityDE:EY3 / Century Aluminum Company
InstitutionHeadlands Technologies LLC
Latest Disclosed Ownership48,903 shares
Latest Disclosed Value $ 2,870,117
Headlands Technologies LLC reports 36.84% decrease in ownership of EY3 / Century Aluminum Company

On May 13, 2026 - Headlands Technologies LLC filed a 13F-HR form disclosing ownership of 48,903 shares of Century Aluminum Company (DE:EY3) valued at $2,470,580 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 77,432 shares of Century Aluminum Company. This represents a change in shares of -36.84% during the quarter. The current value of the position is $2,561,539 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)
2026-05-13 2026-03-31 13F CENTURY ALUM COM 156431108 48,903 -28,529 -36.84 2,870 -5.37 0.3269
2026-02-13 2025-12-31 13F CENTURY ALUM COM 156431108 77,432 5,741 8.01 3,034 44.15 0.2532
2025-11-12 2025-09-30 13F CENTURY ALUM COM 156431108 71,691 56,695 378.07 2,105 679.26 0.1681
2025-08-14 2025-06-30 13F CENTURY ALUM COM 156431108 14,996 7,070 89.20 270 83.67 0.0324
2025-05-09 2025-03-31 13F CENTURY ALUM COM 156431108 7,926 -13,275 -62.61 147 -61.92 0.0168
2025-02-12 2024-12-31 13F CENTURY ALUM COM 156431108 21,201 20,312 2,284.81 386 2,657.14 0.0388
2024-11-12 2024-09-30 13F CENTURY ALUM COM 156431108 889 889 14 0.0017
2023-11-09 2023-09-30 13F CENTURY ALUM COM 156431108 0 -1,058 -100.00 0 -100.00
2023-08-03 2023-06-30 13F CENTURY ALUM COM 156431108 1,058 1,058 9 0.0030
2023-05-01 2023-03-31 13F CENTURY ALUM COM 156431108 0 -536 -100.00 0 0.0000
2023-02-14 2022-12-31 13F CENTURY ALUM COM 156431108 536 536 0 0.0032
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.