Klein Rosemary L 4

What Happened

• Rosemary L. Klein, SVP, Chief Legal Officer & Corporate Secretary of Core Natural Resources (CNR), sold a total of 15,000 shares in open-market transactions on 2026-03-19. She sold 10,000 shares at $105.00 for $1,050,000 and 5,000 shares at $110.62 for $553,100, for combined proceeds of $1,603,100. This was a sale (not a purchase or option exercise).

Key Details

• Transaction dates and prices:
  • 2026-03-19: 10,000 shares sold at $105.00 ($1,050,000)
  • 2026-03-19: 5,000 shares sold at $110.62 ($553,100)
• Shares owned after transaction: 53,679 shares total.
• Footnote: Of the 53,679 shares, 11,045 represent unvested restricted stock units (RSUs).
• Filing: Form 4 was filed 2026-03-20 for transactions on 2026-03-19 (filed timely based on reported dates).
• No 10b5-1 plan, tax-withholding, or cashless-exercise notes were disclosed in the filing.

Context

• Sales by insiders can be routine (diversification, tax needs, planned sales) and do not by themselves indicate management’s view of the company’s prospects. Purchases generally carry more weight for signalling, but this record simply documents the insider’s disposition of shares.