CENTURY ALUMINUM CO — All Filings
1,000 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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10-K
10-K/A
10-K405
10-Q
11-K
144
15-15D
3
3/A
4
4/A
424B3
424B5
5
8-A12B
8-K
8-K/A
ARS
AW
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFR14A
EFFECT
FWP
IRANNOTICE
NT 10-K
POS AM
POSASR
PRE 14A
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D/A
SCHEDULE 13G/A
SD
T-3
T-3/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | FORM 4 | 0001628280-26-021790 | Mar 27, 2026 | Mar 25, 2026 |
| SCHEDULE 13G/A | — | 0000102909-26-000910 | Mar 26, 2026 | — |
| 144 | — | 0001957799-26-000043 | Mar 25, 2026 | — |
| 4 | FORM 4 | 0001628280-26-018929 | Mar 17, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0001628280-26-017779 | Mar 13, 2026 | Mar 12, 2026 |
| 4 | FORM 4 | 0001628280-26-017769 | Mar 13, 2026 | Mar 11, 2026 |
| 144 | — | 0001949846-26-000172 | Mar 12, 2026 | — |
| 4 | FORM 4 | 0001628280-26-015724 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | FORM 4 | 0001628280-26-014882 | Mar 4, 2026 | Mar 2, 2026 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-26-023527 | Mar 4, 2026 | — |
| SCHEDULE 13D/A | — | 0001104659-26-023524 | Mar 4, 2026 | — |
| 144 | — | 0001104659-26-023513 | Mar 4, 2026 | — |
| 4 | FORM 4 | 0001628280-26-013986 | Mar 3, 2026 | Feb 27, 2026 |
| IRANNOTICE | IRANNOTICE | 0001628280-26-013794 | Mar 3, 2026 | — |
| 10-K | 10-K | 0001628280-26-013788 | Mar 3, 2026 | Dec 31, 2025 |
| 8-K | 8-K | 0001628280-26-013781 | Mar 3, 2026 | Mar 2, 2026 |
| NT 10-K | NT 10-K | 0001628280-26-013780 | Mar 3, 2026 | — |
| 144 | — | 0001949846-26-000127 | Mar 2, 2026 | — |
| 4 | FORM 4 | 0001628280-26-012919 | Feb 27, 2026 | Feb 25, 2026 |
| 144 | — | 0001949846-26-000121 | Feb 27, 2026 | — |
| 4 | FORM 4 | 0001628280-26-011855 | Feb 25, 2026 | Feb 23, 2026 |
| 144 | — | 0001949846-26-000107 | Feb 25, 2026 | — |
| 144 | — | 0001949846-26-000105 | Feb 25, 2026 | — |
| 144 | — | 0001949846-26-000094 | Feb 23, 2026 | — |
| 8-K | 8-K | 0001628280-26-009831 | Feb 19, 2026 | — |
| 4 | FORM 4 | 0001628280-26-007374 | Feb 11, 2026 | Feb 9, 2026 |
| 8-K | FORM 8-K | 0001104659-26-009212 | Feb 2, 2026 | — |
| SCHEDULE 13G/A | — | 0000102909-26-000109 | Jan 30, 2026 | — |
| 4 | FORM 4 | 0001628280-26-003351 | Jan 23, 2026 | Jan 12, 2026 |
| 144 | — | 0001968582-26-000060 | Jan 23, 2026 | — |
| 4 | FORM 4 | 0001628280-26-000594 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000589 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000570 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000566 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000548 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000528 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000513 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0001628280-26-000499 | Jan 5, 2026 | Dec 31, 2025 |
| 8-K/A | 8-K/A | 0001628280-25-053603 | Nov 21, 2025 | Nov 6, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-111519 | Nov 13, 2025 | Nov 10, 2025 |
| SCHEDULE 13D/A | — | 0001104659-25-109946 | Nov 12, 2025 | — |
| 144 | — | 0001104659-25-109926 | Nov 12, 2025 | — |
| 10-Q | 10-Q | 0001628280-25-050200 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001628280-25-050179 | Nov 6, 2025 | — |
| 8-K | FORM 8-K | 0001104659-25-101317 | Oct 22, 2025 | Oct 21, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-095789 | Oct 2, 2025 | Sep 30, 2025 |
| 4 | FORM 4 | 0001628280-25-043249 | Sep 30, 2025 | Sep 26, 2025 |
| SD | SD | 0001628280-25-042823 | Sep 25, 2025 | — |
| 144 | — | 0001949846-25-000505 | Sep 25, 2025 | — |
| 4 | FORM 4 | 0001628280-25-042475 | Sep 23, 2025 | Sep 19, 2025 |