What SEC filings does Core Natural Resources, Inc. submit to the SEC?

Core Natural Resources, Inc. (CNR) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about CNR?

A Form 4 for CNR discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Core Natural Resources, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for CNR?

The 10-K is Core Natural Resources, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all CNR SEC filings directly on EDGAR?

You can view all historical Core Natural Resources, Inc. filings on the SEC EDGAR company page for CNR. Each filing card on this page links directly to the original SEC document.

How often does Core Natural Resources, Inc. file with the SEC?

Core Natural Resources, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling CNR shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

CNR SEC Filing News — Core Natural Resources, Inc.

Latest SEC filings for Core Natural Resources, Inc. (CNR) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-08-19.

Core Natural Resources, Inc., together with its subsidiaries, produces, sells, and exports metallurgical and thermal coals in the United States and internationally. It operates through the High CV Thermal; Metallurgical; Powder River Basin (PRB); and Core Marine Terminal segments. The High CV Thermal segment consists of Pennsylvania Mining Complex and the West Elk mine located in Colorado. The Metallurgical segment consists of Leer, Leer South, Beckley, Mountain Laurel, and Itmann coal mines in …

Sector: Energy Industry: Thermal Coal Market Cap: $4.5B CIK: 1710366

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

What you're looking at: Each item below is parsed from an actual SEC filing submitted by Core Natural Resources, Inc.. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.

CNR Filing Activity Snapshot 2026-03-25 — 2026-08-19

Insider Transactions (Form 4)

0 buys vs 0 sells

Insider buying and selling activity is balanced in this period.

Insider Transactions 3 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 3 filings in this group are Form 4s for Core Natural Resources, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 3 insider filings shown, the breakdown is 2 compensation award and 1 gift. None of the classified filings involved a discretionary open-market trade, so this period says nothing about what insiders think of the price.

What each transaction type means

Compensation award ×2: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Gift ×1: Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Form 4 Compensation award Tax / Compensation Filing 2026-05-01

CNR insider Form 4 filed for equity award, exercise, or tax withholding

Keating Ronald C (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,390	—	—

Filing: Form 4 (Insider Transaction) Insider: Keating Ronald C (Director) Shares: 1,390

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-05-01

CNR insider Form 4 filed for equity award, exercise, or tax withholding

Doheny Edward L II (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,390	—	—

Filing: Form 4 (Insider Transaction) Insider: Doheny Edward L II (Director) Shares: 1,390

View on SEC EDGAR → Open Filing Document →

Form 4 Gift Tax / Compensation Filing 2026-03-25

CNR insider Form 4 filed for equity award, exercise, or tax withholding

Brock James A (Director, Executive Chair and CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`G`	Gift	24,440	—	—
`G`	Gift	24,440	—	—

Filing: Form 4 (Insider Transaction) Insider: Brock James A (Director, Executive Chair and CEO) Shares: 48,880

View on SEC EDGAR → Open Filing Document →

Material Events 7 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 7 in this period for Core Natural Resources, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-19