Bronstein, Gewirtz & Grossman, LLC is investigating potential claims on behalf of purchasers of Hallador Energy Company (“Hallador” or “the Company”) (NASDAQ: HNRG). Investors who purchased Hallador securities are encouraged to obtain additional information and assist the investigation.

The investigation concerns whether Hallador has violated federal securities laws.

Investigation Details

On May 23, 2025, Hallador disclosed that its agreement with a datacenter developer that granted exclusivity in a potential power supply deal was terminated by the counterparty. Hallador said that “[t]he parties continue to discuss an additional exclusivity period and continue in non-exclusive discussions” and that the Company is also evaluating opportunities with other parties.

On this news, Hallador’s stock price fell $1.38 per share, or 7.33%, to close at $17.45 per share on May 23, 2025.

What’s Next?

If you are aware of any facts relating to this investigation or purchased Hallador securities, you can assist this investigation. You can also contact Peretz Bronstein or his client relations manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC: 332-239-2660