← United States · Coverage record
US · SEC FORM 4
Core Natural Resources, Inc.
CNR · NYSE · CIK 0001710366 · Energy · Thermal Coal
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
2 Form 4 transaction lines observed in the same window
0 sales · 2 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
—
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-05-09 · Lang Paul A.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.
Price performance
- 1M
- -13.3%
- 3M
- +10.1%
- 6M
- -14.7%
- 12M
- —
Volatility & liquidity
- Volatility
- 45.8%
- Beta
- —
- Avg daily value
- —
Valuation
- Market cap
- —
- P/E
- —
Fundamentals
- Profit margin
- -3.7%
- ROE
- -4.2%
- Industry
- Thermal Coal
Market data
Price data up to: 2026-10-04 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · Status: PASS
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 1,814,892
- Previous report
- 1,902,166
- Avg daily volume
- 558,762
- Days to cover
- 3.2
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-05-09 | Lang Paul A | Purchase (P) | Common stock, par value $0.01 per share | 7,500 | USD 66.95 | USD 502,125 | SEC filing ↗ |
| 2020-02-19 | MILLS JOHN T | Purchase (P) | Common stock, par value $0.01 per share | 4,000 | USD 6.46 | USD 25,840 | SEC filing ↗ |
Form 4 evidence
40 transaction lines in the latest 365-day window; 301 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-04-30 | Keating Ronald C | Award / grant (A) | Common Stock, par value $0.01 per share ("Common Stock") | 1,390 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Doheny Edward L II | Award / grant (A) | Common Stock, par value $0.01 per share ("Common Stock") | 1,390 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-24 | Brock James A | Gift (G) | Common stock, par value $0.01 per share | 24,440 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-04-30 | Keating Ronald C | Award / grant (A) | Common Stock, par value $0.01 per share ("Common Stock") | 1,390 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Doheny Edward L II | Award / grant (A) | Common Stock, par value $0.01 per share ("Common Stock") | 1,390 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-24 | Brock James A | Gift (G) | Common stock, par value $0.01 per share | 24,440 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-19 | Klein Rosemary L | Sale (S) | Common stock, par value $0.01 per share | 15,000 | USD 106.87 | USD 1,603,100 | SEC filing ↗ |
| 2026-03-18 | Brock James A | Sale (S) | Common stock, par value $0.01 per share | 40,760 | USD 101.15 | USD 4,122,874 | SEC filing ↗ |
| 2026-03-17 | Rothka John | Sale (S) | Common stock, par value $0.01 per share | 1,000 | USD 97.66 | USD 97,660 | SEC filing ↗ |
| 2026-03-10 | Rothka John | Sale (S) | Common stock, par value $0.01 per share | 3,800 | USD 91.62 | USD 348,156 | SEC filing ↗ |
| 2026-03-10 | NAVARRE RICHARD A | Sale (S) | Common stock, par value $0.01 per share | 6,000 | USD 91.70 | USD 550,200 | SEC filing ↗ |
| 2026-02-18 | Rothka John | Tax withholding (F) | Common stock, par value $0.01 per share | 79 | USD 88.96 | USD 7,028 | SEC filing ↗ |
| 2026-02-18 | Brock James A | Tax withholding (F) | Common stock, par value $0.01 per share | 2,960 | USD 88.96 | USD 263,322 | SEC filing ↗ |
| 2026-02-18 | Thakkar Miteshkumar | Tax withholding (F) | Common stock, par value $0.01 per share | 2,029 | USD 88.96 | USD 180,500 | SEC filing ↗ |
| 2026-02-18 | Slone Deck | Tax withholding (F) | Common stock, par value $0.01 per share | 1,218 | USD 88.96 | USD 108,353 | SEC filing ↗ |
| 2026-02-18 | Schuller George John JR | Tax withholding (F) | Common stock, par value $0.01 per share | 1,782 | USD 88.96 | USD 158,527 | SEC filing ↗ |
| 2026-02-18 | Salvatori Kurt R. | Tax withholding (F) | Common stock, par value $0.01 per share | 1,148 | USD 88.96 | USD 102,126 | SEC filing ↗ |
| 2026-02-18 | Rothka John | Tax withholding (F) | Common stock, par value $0.01 per share | 97 | USD 88.96 | USD 8,629 | SEC filing ↗ |
| 2026-02-18 | Klein Rosemary L | Tax withholding (F) | Common stock, par value $0.01 per share | 1,243 | USD 88.96 | USD 110,577 | SEC filing ↗ |
| 2026-02-18 | Brock James A | Tax withholding (F) | Common stock, par value $0.01 per share | 70,805 | USD 88.96 | USD 6,298,813 | SEC filing ↗ |
| 2026-02-18 | Braithwaite Robert J. Jr. | Tax withholding (F) | Common stock, par value $0.01 per share | 774 | USD 88.96 | USD 68,855 | SEC filing ↗ |
| 2026-02-17 | Thakkar Miteshkumar | Award / grant (A) | Common stock, par value $0.01 per share | 8,730 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Slone Deck | Award / grant (A) | Common stock, par value $0.01 per share | 5,060 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Schuller George John JR | Award / grant (A) | Common stock, par value $0.01 per share | 7,530 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Salvatori Kurt R. | Award / grant (A) | Common stock, par value $0.01 per share | 4,820 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Rothka John | Award / grant (A) | Common stock, par value $0.01 per share | 760 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Platt Joseph P JR | Award / grant (A) | Common stock, par value $0.01 per share | 1,610 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Perera Valli | Award / grant (A) | Common stock, par value $0.01 per share | 1,610 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | NAVARRE RICHARD A | Award / grant (A) | Common stock, par value $0.01 per share | 2,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Klein Rosemary L | Award / grant (A) | Common stock, par value $0.01 per share | 5,060 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | KRIEGSHAUSER PATRICK A | Award / grant (A) | Common stock, par value $0.01 per share | 1,610 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | KOEPPEL HOLLY K | Award / grant (A) | Common stock, par value $0.01 per share | 1,610 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-17 | Brock James A | Award / grant (A) | Common stock, par value $0.01 per share | 21,190 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | CNR |
| CIK | 0001710366 |
| Sector | Energy |
| Industry | Thermal Coal Yahoo Finance |
| SEC SIC | 1220 Silver Ores |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 301 transaction lines from 2020-02-05 to 2026-04-30 2 P purchase lines · 60 S sale lines · 239 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.