Trade Summary

4 days ago, Klein Rosemary L, serving as SVP, CLO, Corp. Sec. at Core Natural Resources, Inc. (CNR), sold 15,000 shares at $106.87 per share, for a total transaction value of $1,603,100.00. Following this transaction, Klein Rosemary L now holds 53,679 shares of CNR.

This sale represents a 22.00% decrease in Klein Rosemary L's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Thursday, March 19, 2026 and publicly disclosed via SEC Form 4 filing on Friday, March 20, 2026, 1 day after the trade was made.

Core Natural Resources, Inc. operates in the ENERGY sector, specifically within the THERMAL COAL industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.