Hallador Energy (HNRG) said late Thursday that a conversion transaction commitment agreement, effective Jan. 2, with a "leading global datacenter developer was being terminated by the counterparty."

"The company is evaluating opportunities with several other interested third parties and believes that the competitive tension introduced by these third-party negotiations enhances its positioning to execute a strategic transaction that delivers long-term value to its shareholders," it said in a regulatory filing.

Shares of Hallador slumped over 10% in premarket activity Friday.

Price: 16.90, Change: -1.93, Percent Change: -10.25