Core Natural Resources, Inc. (CNR) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-05-01

Core Natural Resources, Inc. (CNR) has filed 2 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-01. 5 Form 8-K material event filings were reported by CNR in the last 90 days. InsiderAlpha tracks every CNR SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Core Natural Resources, Inc. (CNR)

SIC classificationSilver Ores (SIC 1220)
SEC CIK0001710366

90-Day SEC Filing Activity

Form 4 filings (90d)2
Form 8-K filings (90d)5
Latest Form 4 filing2026-05-01

Recent CNR Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Doheny Edward L IIDirectorA — Grant or award1.4K$0.00—SEC
Keating Ronald CDirectorA — Grant or award1.4K$0.00—SEC
Brock James AExecutive Chair and CEOG — Bona-fide gift24.4K$0.00—SEC
Brock James AExecutive Chair and CEOG — Bona-fide gift24.4K$0.00—SEC
Klein Rosemary LSVP, CLO & Corp. Sec.S — Open-market sale5.0K$110.62$553KSEC
Klein Rosemary LSVP, CLO & Corp. Sec.S — Open-market sale10.0K$105.00$1.05MSEC
Brock James AExecutive Chair and CEOS — Open-market sale40.8K$101.15$4.12MSEC
Rothka JohnChief Accounting OfficerS — Open-market sale1.0K$97.66$98KSEC
Rothka JohnChief Accounting OfficerS — Open-market sale3.8K$91.62$348KSEC
NAVARRE RICHARD AInsiderS — Open-market sale6.0K$91.70$550KSEC
Brock James AExecutive Chair and CEOF — Tax withholding / forfeiture4.4K$88.96$395KSEC
Thakkar MiteshkumarPresident & CFOF — Tax withholding / forfeiture1.2K$88.96$109KSEC
Klein Rosemary LSVP, CLO & Corp. Sec.F — Tax withholding / forfeiture497$88.96$44KSEC
Schuller George John JRSVP, Chief Operating OfficerF — Tax withholding / forfeiture713$88.96$63KSEC
Thakkar MiteshkumarPresident & CFOF — Tax withholding / forfeiture806$88.96$72KSEC

All transactions sourced from SEC EDGAR Form 4 filings for Core Natural Resources, Inc. (CNR). Updated in real time as new filings are submitted to the SEC.

Most-Active CNR Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Keating Ronald C1—
Doheny Edward L II1—

Recent CNR Form 8-K Material Events

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CNR insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

CNR Insider Trading — FAQ

What is the latest insider trade for CNR?
Core Natural Resources, Inc. (CNR) had 2 insider filings in the last 90 days, with the most recent on 2026-05-01. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying CNR stock?
0 insider purchases of CNR were filed in the last 90 days.
How many insiders are selling CNR stock?
0 insider sales of CNR were filed in the last 90 days.
Where can I see CNR SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every CNR SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live CNR dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.