Recent 8-K filings for CNR

• May 07, 2026 23:59 UTC earnings materiality 0.70 positive item 2.02item 7.01item 9.01

  CNR Q1 net income $21M, adj EBITDA $180M; returns $47M to shareholders

  Net income $21.0M ($0.41 diluted EPS); revenue $1.1B; adjusted EBITDA $179.9M.

• Feb 12, 2026 23:59 UTC earnings materiality 0.70 neutral item 2.02item 7.01item 9.01

  Core Natural Resources Q4 net loss $79M, adj. EBITDA $103M; resumes full production at Leer South

  Net loss $79M ($1.54 diluted EPS); adjusted EBITDA $103.1M inclusive of $36.4M fire/extinguishment and idle mine costs.

• Dec 18, 2025 23:59 UTC other material materiality 0.65 positive item 7.01item 9.01

  Core Natural Resources resumes longwall operations at Leer South mine; West Elk productivity normalizes

  Leer South longwall restarted after being idle since Jan 13, 2025 due to combustion-related activity.

• Nov 06, 2025 23:59 UTC earnings materiality 0.65 positive item 2.02item 7.01item 9.01

  Core Natural Resources Q3 net income $31.6M, adj. EBITDA $141.2M; returns $24.6M to stockholders

  Net income $31.6M ($0.61 diluted EPS); adjusted EBITDA $141.2M; revenue $1,002.5M.

• Oct 08, 2025 23:59 UTC leadership materiality 0.65 neutral item 5.02item 7.01item 9.01

  Core Natural Resources appoints board chair Jimmy Brock as CEO; Paul Lang departs

  James A. Brock appointed CEO effective October 6, 2025, succeeding Paul A. Lang.

• Aug 05, 2025 23:59 UTC earnings materiality 0.75 neutral item 2.02item 7.01item 9.01

  Core Natural Resources Q2 net loss $36.6M, adj. EBITDA $144.3M, synergies target raised to $150-170M

  Net loss of $36.6M ($0.70 diluted EPS); revenues $1,102.4M; adj. EBITDA $144.3M incl. $21.2M Leer South costs.

• Jun 30, 2025 23:59 UTC other material materiality 0.65 neutral item 7.01item 9.01

  Core Natural Resources updates Leer South restart; delay of up to 4 months, insurance recovery >$100M

  Mine re-entered June 10; ventilation restored, longwall components in good condition.

• May 08, 2025 23:59 UTC earnings materiality 0.75 neutral item 2.02item 7.01item 9.01

  Core Natural Resources Q1 net loss $69.3M; adjusted EBITDA $123.5M; synergy target raised to $125-150M

  Net loss $69.3M ($1.38/diluted share) includes $49.2M merger costs and $11.7M debt extinguishment loss.

• Mar 28, 2025 23:59 UTC debt materiality 0.70 positive item 7.01item 8.01item 9.01

  Core Natural Resources completes $307M tax-exempt bond refinancing at 5.3% avg rate

  Total bond amount $306.78M ($97.56M PA, $102.865M MD, $106.355M WV) with 10-year maturity, unsecured.

• Feb 20, 2025 23:59 UTC other material materiality 0.60 negative item 8.01item 9.01

  Core Natural Resources files Arch Resources FY2024 audited financials; revenue down 23%, net income down 93%

  Arch Resources' 2024 revenue $2.43B vs $3.15B in 2023 (-22.7%).

• Feb 20, 2025 23:59 UTC other material materiality 0.75 positive item 2.02item 7.01item 9.01

  Core Natural Resources adopts 75% FCF return framework, $1B buyback; Leer South mine on track for mid-2025

  Board authorized $1.0B in share repurchases; framework targets ~75% of free cash flow returned to shareholders, primarily via buybacks.

Earnings & guidance

Materiality & sentiment trend

Max materiality 0.75 · Median 0.65 · Most common event earnings

6 positive 3 negative 10 neutral

source · CNR on sec.gov