Core Natural Resources, Inc. (CNR) Insider Trading

Last 12 months

Insiders sold $6.72M and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. Executive Chair and CEO James A Brock sold $4.12M on Mar 18, 7.4% of their stake, outside a plan. The last open-market buy by an executive or director was in May 2025.

Net open-market

−$6.72M

0 buys · 5 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 4

executives and directors

Last open-market buy

May 2025

May 9, 2025

Get an email when CNR's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Mar 19	Rosemary L Klein SVP, CLO & Corp. Sec.	SoldNo plan 2 parts	15,000	$106.87 average	$1.6M	22%	Form 4
Mar 18	James A Brock Executive Chair and CEO	SoldNo plan	40,760	$101.15	$4.12M	7.4%	Form 4
Mar 17	John Rothka Chief Accounting Officer	SoldNo plan	1,000	$97.66	$98k	16%	Form 4
Mar 10	John Rothka Chief Accounting Officer	SoldNo plan	3,800	$91.62	$348k	38%	Form 4
Mar 10	Richard A Navarre Director	SoldNo plan	6,000	$91.70	$550k	25%	Form 4
Oct 8, 2025 – Oct 9, 2025	John Rothka Chief Accounting Officer	Sold10b5-1 plan 2 parts	2,000	$97.50 average	$195k	18%	Form 4
Oct 3, 2025	John Rothka Chief Accounting Officer	Sold10b5-1 plan	2,500	$90.00	$225k	18%	Form 4
Sep 25, 2025	Richard A Navarre Director	SoldNo plan	5,000	$82.20	$411k	19%	Form 4
Sep 17, 2025	Patrick A Kriegshauser Director	SoldNo plan	3,043	$77.07	$235k	12%	Form 4
May 9, 2025	Paul A Lang Chief Executive Officer	Bought	7,500	$66.95	$502k	2.2%	Form 4
Mar 31, 2025	Holly K Koeppel Director	SoldNo plan 2 parts	8,815	$75.30 average	$664k	40%	Form 4

Mar 19No plan
Rosemary L Klein
SVP, CLO & Corp. Sec. · sold 15,000 at avg $106.87
$1.6M
22% of stake
Mar 18No plan
James A Brock
Executive Chair and CEO · sold 40,760 at $101.15
$4.12M
7.4% of stake
Mar 17No plan
John Rothka
Chief Accounting Officer · sold 1,000 at $97.66
$98k
16% of stake
Mar 10No plan
John Rothka
Chief Accounting Officer · sold 3,800 at $91.62
$348k
38% of stake
Mar 10No plan
Richard A Navarre
Director · sold 6,000 at $91.70
$550k
25% of stake
Oct 8, 2025 – Oct 9, 202510b5-1 plan
John Rothka
Chief Accounting Officer · sold 2,000 at avg $97.50
$195k
18% of stake
Oct 3, 202510b5-1 plan
John Rothka
Chief Accounting Officer · sold 2,500 at $90.00
$225k
18% of stake
Sep 25, 2025No plan
Richard A Navarre
Director · sold 5,000 at $82.20
$411k
19% of stake
Sep 17, 2025No plan
Patrick A Kriegshauser
Director · sold 3,043 at $77.07
$235k
12% of stake
May 9, 2025
Paul A Lang
Chief Executive Officer · bought 7,500 at $66.95
$502k
2.2% of stake
Mar 31, 2025No plan
Holly K Koeppel
Director · sold 8,815 at avg $75.30
$664k
40% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch CNR, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in CNR's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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