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Core Natural Resources, Inc.

CNR
Exchange
NYSE
Industry
Silver Ores
SEC CIK
0001710366

No open-market purchases or sales by Core Natural Resources, Inc. insiders were filed in the last 90 days; 357 institutions reported holding it in 13F filings for Q2 2026, worth $3.76B in total; Greenlight Capital is the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Core Natural Resources, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Core Natural Resources, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Core Natural Resources, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Keating Ronald CDirector1,390May 1, 20261
Doheny Edward L IIDirector1,390May 1, 20261
Brock James AExecutive Chair and CEO291,415Mar 25, 20264
Klein Rosemary LSVP, CLO & Corp. Sec.53,679Mar 20, 20262
Rothka JohnChief Accounting Officer5,190Mar 19, 20265
Navarre Richard ADirector18,034Mar 11, 20262
Kriegshauser Patrick ADirector24,958Feb 24, 20261
Koeppel Holly KDirector14,958Feb 24, 20261
Platt Joseph P JRDirector40,648Feb 24, 20261
Perera ValliDirector9,317Feb 24, 20261
Slone DeckSVP, Strategy & Public Policy70,207Feb 23, 20261
Schuller George John JRSVP, Chief Operating Officer27,338Feb 23, 20261
Salvatori Kurt R.SVP, Chief Admin. Officer24,585Feb 23, 20261
Thakkar MiteshkumarPresident & CFO61,657Feb 23, 20261
Braithwaite Robert J. Jr.SVP, Marketing & Sales16,290Feb 23, 20261
Lang Paul AChief Executive Officer341,062May 12, 20250
Pan Cassandra Chia-WeiDirector7,707Feb 20, 20250
Mills John TDirector55,950May 9, 20240
Wiegand Martha AGeneral Counsel & Secretary37,906Feb 15, 20240
Powell William PDirector130,088May 4, 20230
Bergeron SophieDirector30,828May 12, 20220
Roberson EdDirector75,951May 5, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Mar 20, 2026 (view filing)Mar 191 dayKlein Rosemary LSVP, CLO & Corp. Sec.SSaleCommon stock, par value $0.01 per share−15.0K$106.87−$1.60M−21.8%53.7K after2 lots
Mar 19, 2026 (view filing)Mar 181 dayBrock James AExecutive Chair and CEOSSaleCommon stock, par value $0.01 per share−40.8K$101.15−$4.12M−29.0%100.0K after
Mar 19, 2026 (view filing)Mar 172 daysRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−1.00K$97.66−$97.7K−16.2%5.19K after
Mar 11, 2026 (view filing)Mar 101 dayRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−3.80K$91.62−$348.2K−38.0%6.19K after
Mar 11, 2026 (view filing)Mar 101 dayNavarre Richard ADirectorSSaleCommon stock, par value $0.01 per share−6.00K$91.70−$550.2K−25.0%18.0K after
Oct 10, 2025 (view filing)Oct 8-92 daysRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−2.00K$97.50−$195.0K−17.7%9.31K after2 lots10b5-1
Oct 6, 2025 (view filing)Oct 33 daysRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−2.50K$90.00−$225.0K−18.1%11.3K after10b5-1
Sep 26, 2025 (view filing)Sep 251 dayNavarre Richard ADirectorSSaleCommon stock, par value $0.01 per share−5.00K$82.20−$411.0K−18.6%21.8K after
Sep 18, 2025 (view filing)Sep 171 dayKriegshauser Patrick ADirectorSSaleCommon stock, par value $0.01 per share−3.04K$77.07−$234.5K−11.5%23.3K after
May 12, 2025 (view filing)May 93 daysLang Paul AChief Executive OfficerPPurchaseCommon stock, par value $0.01 per share+7.50K$66.95+$502.1K+2.2%341.1K after
Apr 2, 2025 (view filing)Mar 312 daysKoeppel Holly KDirectorSSaleCommon stock, par value $0.01 per share−8.81K$75.30−$663.7K−39.8%13.3K after2 lots
Jul 1, 2024 (view filing)Jun 27-284 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−17.4K$100.85−$1.75M−3.3%513.8K after8 lots10b5-1
May 24, 2024 (view filing)May 22-232 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−6.30K$98.21−$618.7K−1.2%531.2K after2 lots
Mar 8, 2024 (view filing)Mar 71 dayRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−2.00K$94.56−$189.1K−13.2%13.1K after
Dec 22, 2023 (view filing)Dec 202 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−6.67K$102.55−$683.9K−1.3%526.7K after2 lots10b5-1
Dec 20, 2023 (view filing)Dec 182 daysWiegand Martha AGeneral Counsel & SecretarySSaleCommon stock, par value $0.01 per share−3.33K$100.00−$333.4K−8.7%35.1K after10b5-1
Dec 20, 2023 (view filing)Dec 18-192 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−6.67K$99.27−$662.0K−1.2%533.4K after5 lots10b5-1
Sep 19, 2023 (view filing)Sep 154 daysPlatt Joseph P JRDirectorSSaleCommon stock, par value $0.01 per share−10.2K$98.33−$1.01M−23.1%34.0K after
Aug 16, 2023 (view filing)Aug 14-152 daysMills John TDirectorSSaleCommon stock, par value $0.01 per share−23.4K$80.60−$1.89M−30.2%54.2K after2 lots
Aug 15, 2023 (view filing)Aug 114 daysMills John TDirectorSSaleCommon stock, par value $0.01 per share−282$80.60−$22.7K−0.4%77.6K after
Aug 14, 2023 (view filing)Aug 104 daysSalvatori Kurt R.Chief Administrative OfficerSSaleCommon stock, par value $0.01 per share−6.10K$80.24−$489.2K−36.7%10.5K after
Aug 14, 2023 (view filing)Aug 104 daysWiegand Martha AGeneral Counsel & SecretarySSaleCommon stock, par value $0.01 per share−10.0K$80.33−$803.3K−20.5%38.8K after
Mar 7, 2023 (view filing)Mar 34 daysRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−2.00K$64.34−$128.7K−12.3%14.2K after
Dec 5, 2022 (view filing)Dec 14 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−500$78.20−$39.1K−0.1%473.0K after
Dec 1, 2022 (view filing)Nov 29-302 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−15.8K$75.91−$1.20M−3.2%473.5K after2 lots
Sep 7, 2022 (view filing)Sep 61 dayWiegand Martha AGeneral Counsel & SecretarySSaleCommon stock, par value $0.01 per share−8.50K$75.00−$637.5K−13.9%52.9K after
Sep 2, 2022 (view filing)Sep 11 dayWiegand Martha AGeneral Counsel & SecretarySSaleCommon stock, par value $0.01 per share−8.50K$70.86−$602.3K−12.2%61.4K after2 lots
Aug 19, 2022 (view filing)Aug 181 dayRothka JohnChief Accounting OfficerSSaleCommon stock, par value $0.01 per share−2.00K$70.36−$140.7K−11.0%16.2K after
Aug 19, 2022 (view filing)Aug 172 daysSalvatori Kurt R.Chief Administrative OfficerSSaleCommon stock, par value $0.01 per share−14.3K$67.21−$962.7K−46.6%16.4K after2 lots
Aug 19, 2022 (view filing)Aug 172 daysWiegand Martha AGeneral Counsel & SecretarySSaleCommon stock, par value $0.01 per share−7.00K$67.03−$469.2K−9.1%69.9K after
Aug 19, 2022 (view filing)Aug 172 daysBrock James AChief Executive OfficerSSaleCommon stock, par value $0.01 per share−50.0K$67.60−$3.38M−9.3%489.3K after3 lots
May 25, 2022 (view filing)May 232 daysPlatt Joseph P JRDirectorSSaleCommon stock, par value $0.01 per share−14.2K$51.45−$729.4K−25.3%41.8K after2 lots
May 19, 2022 (view filing)May 17-192 daysMills John TDirectorSSaleCommon stock, par value $0.01 per share−14.2K$51.22−$726.2K−15.8%75.6K after3 lots
May 12, 2022 (view filing)May 102 daysBergeron SophieDirectorSSaleCommon stock, par value $0.01 per share−12.2K$48.25−$588.6K−28.4%30.8K after
Apr 14, 2022 (view filing)Apr 122 daysSalvatori Kurt R.Chief Administrative OfficerSSaleCommon stock, par value $0.01 per share−7.00K$42.04−$294.1K−18.5%30.7K after