# Century Aluminum Co: filings

CENX · Nasdaq · CIK 949157 · [Materials](/sectors/materials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/cenx.md) · [Financials](/companies/cenx/financials.md) · [Filings](/companies/cenx/filings.md) · [Insiders](/companies/cenx/insiders.md)

## Reports and events: 346 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 466, 8-K 216, 10-Q 53, IRANNOTICE 49, SC 13G/A 46, 3 34, UPLOAD 29, CORRESP 27, SC 13D/A 26, 144 19, DEFA14A 19, 10-K 18, DEF 14A 18, SC 13G 13, 8-K/A 7, SCHEDULE 13G/A 6, 10-K/A 5, 4/A 5, POSASR 5, 11-K 4, ARS 4, EFFECT 4, S-8 4, S-8 POS 4, S-3 3, S-3/A 3, S-3ASR 3, SD 3, 15-15D 2, 3/A 2, 424B5 2, PRE 14A 2, SCHEDULE 13D/A 2, 5 1, 8-A12B 1, AW 1, CT ORDER 1, DEFR14A 1, FWP 1, NT 10-K 1, POS AM 1, RW 1, SC 13D 1, T-3 1, T-3/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-08-06 | 20:11 ET | [10-Q](/filings/0001628280-26-054308.md) | Quarterly report, period 2026-06-30 | 0001628280-26-054308 |
| 2026-08-06 | 20:09 ET | [8-K](/filings/0001628280-26-054300.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-054300 |
| 2026-06-17 | 20:35 ET | [8-K](/filings/0001628280-26-043936.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001628280-26-043936 |
| 2026-05-07 | 20:10 ET | [10-Q](/filings/0001628280-26-032094.md) | Quarterly report, period 2026-03-31 | 0001628280-26-032094 |
| 2026-05-07 | 20:06 ET | [8-K](/filings/0001628280-26-032082.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-032082 |
| 2026-04-24 | 13:00 ET | [DEF 14A](/filings/0001552781-26-000269.md) | Proxy statement, period 2026-06-15 | 0001552781-26-000269 |
| 2026-03-04 | 21:49 ET | [SCHEDULE 13D/A](/filings/0001104659-26-023524.md) | Ownership report, active investor, amended | 0001104659-26-023524 |
| 2026-03-03 | 21:07 ET | [10-K](/filings/0001628280-26-013788.md) | Annual report, period 2025-12-31 | 0001628280-26-013788 |
| 2026-03-03 | 21:05 ET | [8-K](/filings/0001628280-26-013781.md) | 4.02 Non-reliance on financial statements | 0001628280-26-013781 |
| 2026-02-19 | 21:46 ET | [8-K](/filings/0001628280-26-009831.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-009831 |
| 2026-02-02 | 21:17 ET | [8-K](/filings/0001104659-26-009212.md) | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-009212 |
| 2025-11-21 | 21:18 ET | [8-K/A](/filings/0001628280-25-053603.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-053603 |
| 2025-11-12 | 15:02 ET | [SCHEDULE 13D/A](/filings/0001104659-25-109946.md) | Ownership report, active investor, amended | 0001104659-25-109946 |
| 2025-11-06 | 21:21 ET | [10-Q](/filings/0001628280-25-050200.md) | Quarterly report, period 2025-09-30 | 0001628280-25-050200 |
| 2025-11-06 | 21:13 ET | [8-K](/filings/0001628280-25-050179.md) | 2.01 Completion of an acquisition or disposition; 9.01 Financial statements and exhibits | 0001628280-25-050179 |
| 2025-10-22 | 21:35 ET | [8-K](/filings/0001104659-25-101317.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-101317 |
| 2025-08-07 | 20:12 ET | [10-Q](/filings/0001628280-25-038882.md) | Quarterly report, period 2025-06-30 | 0001628280-25-038882 |
| 2025-08-07 | 20:07 ET | [8-K](/filings/0001628280-25-038866.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-038866 |
| 2025-07-24 | 10:11 ET | [8-K](/filings/0001104659-25-070186.md) | 1.01 Entry into a material agreement; 1.02 Termination of a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-070186 |
| 2025-07-17 | 16:12 ET | [8-K](/filings/0001104659-25-068601.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-068601 |
| 2025-06-20 | 23:55 ET | [8-K](/filings/0000949157-25-000051.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000949157-25-000051 |
| 2025-05-08 | 22:19 ET | [10-Q](/filings/0000949157-25-000035.md) | Quarterly report, period 2025-03-31 | 0000949157-25-000035 |
| 2025-05-07 | 20:06 ET | [8-K](/filings/0000949157-25-000033.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-25-000033 |
| 2025-04-25 | 20:05 ET | [DEF 14A](/filings/0001552781-25-000153.md) | Proxy statement, period 2025-06-16 | 0001552781-25-000153 |
| 2025-03-21 | 20:31 ET | [8-K](/filings/0001104659-25-026687.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-026687 |
| 2025-03-03 | 22:23 ET | [10-K](/filings/0000949157-25-000024.md) | Annual report, period 2024-12-31 | 0000949157-25-000024 |
| 2025-02-20 | 21:08 ET | [8-K](/filings/0000949157-25-000023.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-25-000023 |
| 2024-12-11 | 21:05 ET | [8-K](/filings/0001104659-24-127614.md) | 5.02 Departure or appointment of officers or directors | 0001104659-24-127614 |
| 2024-11-04 | 21:08 ET | [10-Q](/filings/0000949157-24-000093.md) | Quarterly report, period 2024-09-30 | 0000949157-24-000093 |
| 2024-11-04 | 21:05 ET | [8-K](/filings/0000949157-24-000092.md) | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000949157-24-000092 |
| 2024-08-12 | 22:00 ET | [SC 13D/A](/filings/0001104659-24-088477.md) | Ownership report, active investor, amended | 0001104659-24-088477 |
| 2024-08-08 | 20:15 ET | [10-Q](/filings/0000949157-24-000078.md) | Quarterly report, period 2024-06-30 | 0000949157-24-000078 |
| 2024-08-08 | 20:06 ET | [8-K](/filings/0000949157-24-000076.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-24-000076 |
| 2024-06-07 | 22:04 ET | [8-K](/filings/0000949157-24-000059.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000949157-24-000059 |
| 2024-05-01 | 12:02 ET | [10-Q](/filings/0000949157-24-000046.md) | Quarterly report, period 2024-03-31 | 0000949157-24-000046 |
| 2024-05-01 | 12:00 ET | [8-K](/filings/0000949157-24-000045.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-24-000045 |
| 2024-04-18 | 20:26 ET | [DEF 14A](/filings/0000949157-24-000038.md) | Proxy statement, period 2024-06-03 | 0000949157-24-000038 |
| 2024-03-25 | 10:51 ET | [8-K](/filings/0000949157-24-000033.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000949157-24-000033 |
| 2024-03-15 | 20:04 ET | [10-K](/filings/0000949157-24-000028.md) | Annual report, period 2023-12-31 | 0000949157-24-000028 |
| 2024-02-21 | 21:07 ET | [8-K](/filings/0000949157-24-000020.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-24-000020 |
| 2024-01-05 | 21:25 ET | [SC 13D/A](/filings/0001104659-24-001816.md) | Ownership report, active investor, amended | 0001104659-24-001816 |
| 2023-12-19 | 12:00 ET | [8-K](/filings/0000949157-23-000074.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000949157-23-000074 |
| 2023-11-08 | 21:07 ET | [10-Q](/filings/0000949157-23-000071.md) | Quarterly report, period 2023-09-30 | 0000949157-23-000071 |
| 2023-11-08 | 21:06 ET | [8-K](/filings/0000949157-23-000070.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-23-000070 |
| 2023-08-09 | 20:10 ET | [10-Q](/filings/0000949157-23-000065.md) | Quarterly report, period 2023-06-30 | 0000949157-23-000065 |
| 2023-08-09 | 20:05 ET | [8-K](/filings/0000949157-23-000063.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-23-000063 |
| 2023-06-09 | 20:05 ET | [8-K](/filings/0000949157-23-000053.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000949157-23-000053 |
| 2023-05-09 | 20:06 ET | [10-Q](/filings/0000949157-23-000035.md) | Quarterly report, period 2023-03-31 | 0000949157-23-000035 |
| 2023-05-08 | 20:12 ET | [8-K](/filings/0000949157-23-000032.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000949157-23-000032 |
| 2023-05-05 | 20:31 ET | [8-K](/filings/0001104659-23-056583.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001104659-23-056583 |

Page 1 of 7. [Older](/companies/cenx/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:01 ET. No prices; not investment advice.