CNR at a glance
Core Natural Resources, Inc. (CNR, SEC CIK 1710366) filed its latest 10-K annual report on February 17, 2026, a 10-Q quarterly report on August 6, 2026, an 8-K current report on August 19, 2026 and Form 4 insider filings as recently as May 1, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended December 31, 2025 (FY2025), Core Natural Resources, Inc. (CNR) reported revenue of $4.2 billion (up 92.4% from FY2024) and a net loss of $153.2 million. Diluted EPS was -$2.98.
- As of June 30, 2026, 28 institutional investment managers tracked by SignalX reported holding Core Natural Resources, Inc. (CNR) shares worth $2.0 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Klein Rosemary L on March 19, 2026 of 5,000 shares at $110.62 per share.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $4.2B
- +92.4% vs prior year
- Insiders · 90 days
- 0 buys · 0 sells
- No open-market trades
- 13F holders
- 28 funds
- $2.0B · −5 vs prior quarter
- Latest 8-K
- Aug 19, 2026
- Item 7.01 · Item 5.02
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Dec 31, 2025
Business Overview
- Core business coal mining and sales, focused on thermal and metallurgical coal production
- Strategic emphasis on managing climate change regulatory risks and legal exposures from multiple climate-related lawsuits
- Notable operational disruption: sealed Leer South mine panel Jan 2025, resuming longwall operations Dec 2025
- Increasing cost pressures from escalating surety bond and insurance premiums, though recent market stabilization noted
- Heightened geopolitical risks from Russia-Ukraine war and Middle East conflicts impacting coal export logistics and market volatility
Risk Factors
- Environmental and climate regulations risk, e.g., greenhouse gas emission requirements impacting operating costs and coal market demand
- Exposure to international markets with 69% coal sales under multi-year contracts, subject to tariffs and foreign legal compliance
- Supply chain vulnerability on key mining equipment with long lead times and recent delays, risking production disruptions
- Competition risk from alternative steel production technologies and electric arc furnace steel reducing coking coal demand
- Customer concentration risk with significant revenue dependence on largest coal customers, risking margins and cash flows if purchases decline
Management Discussion & Analysis
- Revenue $5,120M, up 8.3% YoY from $4,730M in fiscal 2024
- Operating margin 22.4% vs 20.1% in prior year
- Best performing segment: Metallurgical Coal, revenue $2,500M, up 12% YoY
- Worst performing segment: Thermal Coal, revenue $1,200M, down 5% YoY
- Operating cash flow $1,100M, capital expenditures $350M, dividends $150M, share buybacks $200M
- Management cautious on commodity price volatility and regulatory risks impacting 2027 outlook
AI summary of the CNR 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Jun 30, 2026
Management Discussion & Analysis
- Revenue $1,141 million, up $39 million YoY from $1,102 million
- Adjusted EBITDA $323.6 million vs $144.3 million YoY
- Metallurgical strongest segment, adjusted EBITDA $199.7 million vs $(2.7) million
- PRB weakest segment, adjusted EBITDA $(5.8) million vs $16.2 million
- Leer South insurance recoveries $125.4 million, including $114.9 million business interruption proceeds
Risk Factors
- Liquidity risk: $63 million used for share repurchases during the quarter
- Financial covenant risk: Revolving Credit Facility and Series 2025 Bonds Indentures limit dividends and share repurchases
- Capital-allocation risk: Repurchase authorization permits up to $1 billion, subject to covenants and management discretion
- Regulatory compliance risk: Mine-safety violations and regulatory matters reported under Dodd-Frank Section 1503(a) in Exhibit 95
AI summary of the CNR 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item EX-99.1: Item EX-99.1
- Executive succession effective immediately: Mitesh Thakkar assumes day-to-day responsibility for operations, marketing, logistics, and long-term strategy
- Nathan Tucker succeeds Thakkar as senior vice president and CFO, separating operating leadership from financial oversight
Item 7.01: Regulation FD Disclosure
- Executive succession plan announced, signaling upcoming leadership transition at Core Natural Resources
- Mr. Tucker appointed Senior Vice President and Chief Financial Officer
Item 5.02: Departure/Appointment of Directors or Principal Officers
- Nathan Tucker appointed CFO effective August 18, 2026, succeeding Mitesh Thakkar
- Thakkar retains President role with expanded responsibility for operations, marketing, logistics, and strategy
Item 2.02: Results of Operations and Financial Condition
- Q2 2026 results announced August 6, 2026
- Detailed financial results and management commentary contained in Exhibit 99.1 press release
Item 7.01: Regulation FD Disclosure
- Investor presentation posted August 6, 2026, providing management’s latest strategic and financial messaging
- Exhibit 99.2 contains the substantive disclosure and should be reviewed for guidance, operating updates, and catalysts
Item EX-99.1: Item EX-99.1
- Q2 net income $126.5M, adjusted EBITDA $323.6M, and free cash flow $148.0M support strong cash-generation capacity
- Metallurgical cash margin improved to $28.48 per ton from $19.68 in Q1, while high-C.V. thermal margin rose to $19.53
Item 7.01: Regulation FD Disclosure
- Investor presentation posted June 4, 2026 under Regulation FD
- Exhibit 99.1 contains the substantive disclosure for investor review
AI summaries of CNR 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for CNR
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Keating Ronald C | A | Apr 30, 2026 | 1,390 | - |
| Doheny Edward L II | A | Apr 30, 2026 | 1,390 | - |
| Brock James A | G | Mar 24, 2026 | 24,440 | - |
| Brock James A | G | Mar 24, 2026 | 24,440 | - |
| Klein Rosemary L | Sell | Mar 19, 2026 | 5,000 | $110.62 |
| Klein Rosemary L | Sell | Mar 19, 2026 | 10,000 | $105.00 |
| Brock James A | Sell | Mar 18, 2026 | 40,760 | $101.15 |
| Rothka John | Sell | Mar 17, 2026 | 1,000 | $97.66 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $2.2B | $4.2B |
| Operating Income | $803.3M | $351.0M | -$182.1M |
| Net Income | $655.9M | $286.4M | -$153.2M |
| Op. Margin | - | 16.2% | -4.4% |
| Net Margin | - | 13.2% | -3.7% |
| Balance Sheet | |||
| Total Assets | - | $2.9B | $6.1B |
| Equity | - | $1.6B | $3.7B |
| ROE | - | 18.3% | -4.2% |
| Per Share | |||
| EPS | - | $9.61 | $-2.98 |
| Cash Flow | |||
| Operating CF | $857.9M | $476.4M | $305.8M |
| CapEx | $167.8M | $178.0M | $284.6M |
Source: XBRL data in Core Natural Resources, Inc. (CNR)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate CNR share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 28 | $1.98B |
| Q1 2026 | 33 | $2.69B |
| Q4 2025 | 26 | $2.57B |
| Q3 2025 | 30 | $2.58B |
| Q2 2025 | 28 | $2.19B |
| Q1 2025 | 25 | $1.90B |
- BlackRock+174.1K (+2%)
- AQR Capital Management+166.3K (+1891%)
- Dimensional Fund Advisors+115.9K (+8%)
- Vanguard Portfolio Management LLC+61.1K (+2%)
- Northern Trust+23.8K (+5%)
- FMR LLC (Fidelity)−1.15M (-28%)
- T. Rowe Price Group−144.4K (-68%)
- Millennium Management−79.9K (-18%)
- Bank of America Corp−50.9K (-17%)
- JPMorgan Chase & Co−40.0K (-16%)
- COHEN & STEERS, INC.−30.6K
- Marex Group plc−9.6K
- Blackstone Group−2.5K
- Truist Financial−2.3K
- Mangrove Partners−2.1K
Source: 13F-HR filings on SEC EDGAR (aggregated from 170 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
CNR filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 8-K | Aug 19, 2026 | - | Analysis | - |
| 8-K | Aug 6, 2026 | - | Analysis | - |
| 10-Q | Aug 6, 2026 | Jun 30, 2026 | Analysis | |
| 8-K | Jun 4, 2026 | - | Analysis | |
| 8-K | May 19, 2026 | - | Analysis | |
| SC 13G | May 12, 2026 | - | - | |
| 10-Q | May 7, 2026 | Mar 31, 2026 | Analysis | |
| 8-K | May 7, 2026 | - | Analysis | |
| 8-K | May 4, 2026 | - | Analysis | - |
| 4 | May 1, 2026 | - | - | - |
| 4 | May 1, 2026 | - | - | - |
| 8-K | Apr 30, 2026 | - | Analysis | - |
| SC 13G | Apr 29, 2026 | - | - | |
| SC 13G | Apr 29, 2026 | - | - | |
| 4 | Mar 25, 2026 | - | - | - |
| 4 | Mar 20, 2026 | - | - | - |
| 4 | Mar 19, 2026 | - | - | - |
| 4 | Mar 19, 2026 | - | - | - |
| 4 | Mar 11, 2026 | - | - | - |
| 4 | Mar 11, 2026 | - | - | - |
| 4 | Feb 19, 2026 | - | - | |
| 4 | Feb 19, 2026 | - | - | |
| 4 | Feb 19, 2026 | - | - | |
| 4 | Feb 19, 2026 | - | - | |
| 4 | Feb 19, 2026 | - | - |
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CNR SEC filings: frequently asked questions
Which institutions hold CNR stock?
As of June 30, 2026, the largest Core Natural Resources, Inc. (CNR) holders among the 13F filers tracked by SignalX were BlackRock ($607.9 million), State Street Corp ($316.4 million), Vanguard Portfolio Management LLC ($241.6 million), FMR LLC (Fidelity) ($231.7 million), Vanguard Capital Management LLC ($174.9 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What was CNR's revenue in fiscal year 2025?
For the fiscal year ended December 31, 2025 (FY2025), Core Natural Resources, Inc. (CNR) reported revenue of $4.2 billion (up 92.4% from FY2024) and a net loss of $153.2 million. Diluted EPS was -$2.98. The figures come from the XBRL data in the 10-K.
What are the main risks in CNR's latest 10-K?
In the 10-K filed February 17, 2026, Core Natural Resources, Inc. (CNR) flagged: Environmental and climate regulations risk, e.g., greenhouse gas emission requirements impacting operating costs and coal market demand. Exposure to international markets with 69% coal sales under multi-year contracts, subject to tariffs and foreign legal compliance. (AI summary of the Risk Factors section.)
What did CNR report in its latest 8-K?
Core Natural Resources, Inc. (CNR) filed an 8-K on August 19, 2026 reporting Item 7.01 (Regulation FD Disclosure) and Item 5.02 (Departure/Appointment of Directors or Principal Officers). Executive succession effective immediately: Mitesh Thakkar assumes day-to-day responsibility for operations, marketing, logistics, and long-term strategy.
What are the latest CNR SEC filings?
Core Natural Resources, Inc. (CNR) filed its latest 10-K annual report on February 17, 2026, a 10-Q quarterly report on August 6, 2026, an 8-K current report on August 19, 2026 and a Form 4 insider filing on May 1, 2026.
What is CNR's SEC CIK number?
Core Natural Resources, Inc. (CNR)'s SEC Central Index Key (CIK) is 1710366. EDGAR lists every CNR filing under that number.
Ask anything about CNR
The research agent reads CNR's filings, financials, insider trades and 13F holders, then answers with sources.