Core Natural Resources, Inc. (NYSE: CNR) announced that president Mitesh Thakkar has assumed expanded day-to-day responsibility for the company's primary operating functions, including operations, marketing, logistics, and long-term strategy, effective immediately.

As part of the same transition, the company's board elected Nathan Tucker as senior vice president and chief financial officer, also effective immediately. Tucker had served as Core's vice president of finance since the company's formation in January 2025, and previously held the role of director of finance and investor relations at CONSOL Energy from 2020 until January 2025.

Thakkar had served as Core's president and chief financial officer since the company's formation. Prior to that, he held the position of senior vice president and CFO at CONSOL Energy, one of Core's predecessor companies, from 2020. He joined CONSOL in 2015 after working as an equity analyst at FBR Capital Markets, now part of B. Riley FBR, Inc.

"The board views Mitesh as the ideal person to lead Core's day-to-day endeavors at this exciting time in the company's development and growth," said Jimmy Brock, Core's chairman and CEO.

Core was formed in January 2025 through the merger of CONSOL Energy and Arch Resources. The company is based in Canonsburg, Pennsylvania.