Companies: 10,795·Total market cap: $144.5T
Century Aluminum Company

Century Aluminum Company

CENXNASDAQBasic Materials● Active
$60.12
$-6.31(-9.50%)
Market Cap$6.0B
P/E Ratio
52W High$70.43
52W Low$16.59
SEC Filings

Century Aluminum Company (CENX) SEC Filings & 10-K Annual Reports

SEC EDGAR regulatory submissions (10-K, 10-Q, 8-K), latest forms, and full filing history — quick links to financials and earnings below.

SEC EDGAR · data.sec.gov · CIK 0000949157 · CENX · NASDAQ · as of Jun 8, 2026

Filing snapshot

1,001+
Total Filings
10-Q
Latest Form
2026-05-07
Most Recent
1996
Filing Since

Source: SEC EDGAR (data.sec.gov) · CIK 0000949157 · Updated hourly · Not investment advice

Latest Annual Report

10-K · Annual ReportFY
Filed Date
2026-03-03
Fiscal Year End
Mar 3, 2026
Accession No.
0001628280-26-013788
Primary Document
cenx-20251231.htm
Source: data.sec.gov · CIK 0000949157 · Accession 0001628280-26-013788

Latest Key Filings

10-QQuarterly Report
10-Q
2026-05-07
8-KCurrent Report
8-K
2026-05-07Material Event
Form 4Insider Activity
Ownership Change Disclosures

Executive & director trade disclosures. Full buy/sell sentiment analysis on the dedicated tab.

SEC Filing History

Hide Form 4 / 144
10-QQuarterly Report
10-Q
2026-05-07
View
8-KCurrent Report
8-K
2026-05-07
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-04-24
View
DEFA14AProxy Statement (Additional)
Proxy Statement (Additional)
2026-04-24
View
DEF 14AProxy Statement
Proxy Statement
2026-04-24
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-03-26
View
SCHEDULE 13D/ASCHEDULE 13D/A
SCHEDULE 13D/A
2026-03-04
View
IRANNOTICEIRANNOTICE
IRANNOTICE
2026-03-03
View
10-KAnnual Report
10-K
2026-03-03
View
8-KCurrent Report
8-K
2026-03-03
View
NT 10-KNT 10-K
NT 10-K
2026-03-03
View
8-KCurrent Report
8-K
2026-02-19
View
8-KCurrent Report
FORM 8-K
2026-02-02
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-01-30
View
8-K/ACurrent Report (Amended)
8-K/A
2025-11-21
View
Showing 1–15 of 555 filingsForm 4 / 144 hidden· 1001 total in EDGAR

About SEC Filings & 10-K Annual Reports

Data source: SEC EDGAR (data.sec.gov)  |  Updated: Hourly  |  CIK: 0000949157  |  Exchange: NASDAQ · Basic Materials

Century Aluminum Company (NASDAQ: CENX) has submitted 1,001+ documents to the U.S. Securities and Exchange Commission (SEC) since its IPO in 1996. As a Basic Materials sector company with CIK 0000949157, all filings are publicly accessible via the EDGAR database at no cost.

The annual 10-K report is Century Aluminum Company's most comprehensive regulatory disclosure. The most recent Century Aluminum Company 10-K was filed on 2026-03-03 for fiscal year ending 2026. Historical CENX 10-K annual reports are available from 2009 through 2026.

Investors researching Century Aluminum Company SEC filings can access 10-K annual reports, quarterly 10-Q reports, material event 8-K filings, and proxy statements directly from the links above. All documents are sourced from the official SEC EDGAR system.

Source: SEC EDGAR · data.sec.gov · SEC Form 10-K · SEC Form 10-Q · SEC Form 8-K2026-06-08

Frequently Asked Questions

CENX SEC Filings · 8 questions

Century Aluminum Company (CENX) SEC filings are publicly available on this page and on the official SEC EDGAR database at sec.gov. You can browse all 1,001+ filings and access original documents at no cost. Century Aluminum Company's CIK is 0000949157.

CENX SEC filingsCentury Aluminum Company SEC documentsfind CENX 10-K