Company · CNR · CIK 1710366

Core Natural Resources, Inc. (CNR) SEC filings and CIK.

CNR’s SEC Central Index Key (CIK) is 0001710366, or 1710366 without leading zeros. The SEC’s ticker file lists it as Core Natural Resources, Inc..

Ticker: CNR
CIK: 0001710366
Other tickers: None
Insider transactions, Q3 2026: 0

Insider trading

In Q3 2026, insiders at Core Natural Resources, Inc. reported 0 non-derivative transactions on 1 Forms 3, 4 and 5, including 0 open-market purchases and 0 sales.

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get CNR SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1710366&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1710366" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1710366?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Core Natural Resources, Inc. on SEC.gov

Questions

What is CNR’s CIK number?

CNR’s SEC Central Index Key (CIK) is 0001710366, or 1710366 without leading zeros. The SEC’s ticker file lists it as Core Natural Resources, Inc..

How do I find Core Natural Resources, Inc.’s 10-K?

Request /api/v1/filings?cik=1710366&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/cnr.md

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