As of the latest Form 4 filed May 1, 2026.
What Core Natural Resources, Inc. insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 38 most recent filings for CNR.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-05-01 | 2026-04-30 | Doheny Edward L II Director | AAward | +1.39K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-30 | Keating Ronald C Director | AAward | +1.39K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-25 | 2026-03-24 | Brock James A Executive Chair and CEO | GGift | +24.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-25 | 2026-03-24 | Brock James A, Executive Chair and CEO | GGift | −24.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-20 | 2026-03-19 | Klein Rosemary L SVP, CLO & Corp. Sec. | SSale | −5.00K | $110.62 | $553K | No | Form 4 ↗ |
| 2026-03-20 | 2026-03-19 | Klein Rosemary L, SVP, CLO & Corp. Sec. | SSale | −10.0K | $105.00 | $1.05M | No | Form 4 ↗ |
| 2026-03-19 | 2026-03-18 | Brock James A Executive Chair and CEO | SSale | −40.8K | $101.15 | $4.12M | No | Form 4 ↗ |
| 2026-03-19 | 2026-03-17 | Rothka John Chief Accounting Officer | SSale | −1.00K | $97.66 | $97.7K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Rothka John Chief Accounting Officer | SSale | −3.80K | $91.62 | $348K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | NAVARRE RICHARD A Director | SSale | −6.00K | $91.70 | $550K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Thakkar Miteshkumar President & CFO | FTax | −1.22K | $88.96 | $109K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Thakkar Miteshkumar, President & CFO | FTax | −806.00 | $88.96 | $71.7K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Klein Rosemary L SVP, CLO & Corp. Sec. | FTax | −746.00 | $88.96 | $66.4K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Klein Rosemary L, SVP, CLO & Corp. Sec. | FTax | −497.00 | $88.96 | $44.2K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Schuller George John JR SVP, Chief Operating Officer | FTax | −1.07K | $88.96 | $95.1K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Schuller George John JR, SVP, Chief Operating Officer | FTax | −713.00 | $88.96 | $63.4K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Braithwaite Robert J. Jr. SVP, Marketing & Sales | FTax | −464.00 | $88.96 | $41.3K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Braithwaite Robert J. Jr., SVP, Marketing & Sales | FTax | −310.00 | $88.96 | $27.6K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Salvatori Kurt R. SVP, Chief Admin. Officer | FTax | −689.00 | $88.96 | $61.3K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Salvatori Kurt R., SVP, Chief Admin. Officer | FTax | −459.00 | $88.96 | $40.8K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Rothka John Chief Accounting Officer | FTax | −97.00 | $88.96 | $8.63K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Brock James A Executive Chair and CEO | FTax | −4.44K | $88.96 | $395K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Brock James A, Executive Chair and CEO | FTax | −66.4K | $88.96 | $5.90M | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Slone Deck SVP, Strategy & Public Policy | FTax | −731.00 | $88.96 | $65.0K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-18 | Slone Deck, SVP, Strategy & Public Policy | FTax | −487.00 | $88.96 | $43.3K | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | KRIEGSHAUSER PATRICK A Director | AAward | +1.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Thakkar Miteshkumar President & CFO | AAward | +8.73K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | NAVARRE RICHARD A Director | AAward | +2.20K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Klein Rosemary L SVP, CLO & Corp. Sec. | AAward | +5.06K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Perera Valli Director | AAward | +1.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Schuller George John JR SVP, Chief Operating Officer | AAward | +7.53K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Braithwaite Robert J. Jr. SVP, Marketing & Sales | AAward | +4.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Salvatori Kurt R. SVP, Chief Admin. Officer | AAward | +4.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Rothka John Chief Accounting Officer | AAward | +760.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Platt Joseph P JR Director | AAward | +1.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Brock James A Executive Chair and CEO | AAward | +21.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | Slone Deck SVP, Strategy & Public Policy | AAward | +5.06K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-19 | 2026-02-17 | KOEPPEL HOLLY K Director | AAward | +1.61K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also CNR’s full analysis or the market-wide insider trading feed. The tabs above jump to CNR’s other SEC data.
Source: SEC Form 4 filings for CNR, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.