Century Aluminum Co (CENX) SEC filings and CIK.
CENX’s SEC Central Index Key (CIK) is 0000949157, or 949157 without leading zeros. The SEC’s ticker file lists it as CENTURY ALUMINUM CO.
- Ticker
- CENX
- CIK
- 0000949157
- Other tickers
- None
- Insider transactions, Q3 2026
- None loaded
Recent filings we observed
| Filed | Form | Accession |
|---|---|---|
| 2026-11-06 | S-3ASR | 0001104659-26-123901 |
Get CENX SEC data through the API
Filing history
curl "https://sec-api.dev/api/v1/filings?cik=949157&limit=10" \
-H "Authorization: Bearer $SEC_API_KEY"Company profile
curl "https://sec-api.dev/api/v1/companies/949157" \
-H "Authorization: Bearer $SEC_API_KEY"Reported XBRL facts
curl "https://sec-api.dev/api/v1/facts/949157?taxonomy=us-gaap&concept=Revenues&limit=10" \
-H "Authorization: Bearer $SEC_API_KEY"Ticker to CIK API · SEC filings API · Century Aluminum Co on SEC.gov
Questions
What is CENX’s CIK number?
CENX’s SEC Central Index Key (CIK) is 0000949157, or 949157 without leading zeros. The SEC’s ticker file lists it as CENTURY ALUMINUM CO.
How do I find Century Aluminum Co’s 10-K?
Request /api/v1/filings?cik=949157&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.
Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.
Plain-text version for agents and LLMs: /companies/cenx.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.