MSHA imminent danger order at Hallador (HNRG) Oaktown Fuels Mine No. 1

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

8-K

Rhea-AI Filing Summary

Hallador Energy Company reported that its subsidiary Sunrise Coal received an imminent danger order from the Mine Safety and Health Administration under Section 107(a) of the Mine Act at the Oaktown Fuels Mine No. 1 in Indiana. The order followed an MSHA allegation that an employee of an independent trucking company was seen on an elevated truck bed without fall protection. The employee was ordered to climb down immediately, no injuries occurred, no Sunrise Coal employees were affected, and mine production was not interrupted. Sunrise Coal disputes the order, stating the condition arose solely from an independent contractor’s actions, and it reserves the right to contest the order and any related citation or proposed assessment.

8-K Event Classification

Item 1.04 — Mine Safety - Reporting of Shutdowns and Patterns of Violations

1 item

Item 1.04 Mine Safety - Reporting of Shutdowns and Patterns of Violations Business

Mine safety violations, closure orders, or patterns of safety issues at mining operations.

Key Figures

Imminent danger order date: May 28, 2026 Dodd-Frank enactment date: July 21, 2010 Mine ID number: 12-02394 +2 more

5 metrics

Imminent danger order date May 28, 2026 Date MSHA issued Section 107(a) imminent danger order to Sunrise Coal

Dodd-Frank enactment date July 21, 2010 Enactment date of Dodd-Frank Act requiring mine safety reporting

Mine ID number 12-02394 MSHA identification number for Oaktown Fuels Mine No. 1

Section reference Section 1503 Dodd-Frank section requiring disclosure of mine safety orders

Mine safety section Section 107(a) Section of the Mine Act under which the imminent danger order was issued

Key Terms

imminent danger order, Mine Safety and Health Administration, Section 107(a) of the Federal Mine Safety and Health Act of 1977, Section 1503 of the Dodd-Frank Wall Street and Consumer Protection Act, +1 more

5 terms

imminent danger order regulatory

"received an imminent danger order under Section 107(a) of the Mine Act"

Mine Safety and Health Administration regulatory

"by the federal Mine Safety and Health Administration (“MSHA”)"

The Mine Safety and Health Administration (MSHA) is a U.S. federal agency that sets and enforces safety and health standards for mining operations, conducts inspections, investigates accidents, and issues citations or fines. Its actions matter to investors because safety rules, enforcement actions, or accident findings can increase operating costs, interrupt production, create legal and cleanup liabilities, and damage a miner’s reputation—similar to how building inspections or traffic enforcement affect a company’s ability to operate smoothly.

Section 107(a) of the Federal Mine Safety and Health Act of 1977 regulatory

"under Section 107(a) of the Federal Mine Safety and Health Act of 1977"

Section 1503 of the Dodd-Frank Wall Street and Consumer Protection Act regulatory

"Section 1503 of the Act requires a on if a company is issued"

independent contractor financial

"created solely by the acts or omissions of an independent contractor operating on the mine site"

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Understanding 8-K Material Events →

06/03/2026 - 04:30 PM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 28, 2026

Hallador Energy Company

(Exact name of registrant as specified in its charter)


Colorado	001-34743	84-1014610
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

1183 East Canvasback Drive, Terre Haute, Indiana 47802

(Address, including zip code, of principal executive offices)

Registrant’s telephone number, including area code: (812) 299-2800.

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol	Name of each exchange on which registered
Common Shares, $.01 par value	HNRG	Nasdaq

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.04 Mine Safety - Reporting of Shutdowns and Patterns of Violations.

On July 21, 2010, the Dodd-Frank Wall Street and Consumer Protection Act (the “Act”) was enacted. Section 1503 of the Act requires a Current Report on Form 8-K if a company is issued an imminent danger order under Section 107(a) of the Federal Mine Safety and Health Act of 1977 (the “Mine Act”) by the federal Mine Safety and Health Administration (“MSHA”).

On May 28, 2026, Sunrise Coal, LLC, a subsidiary of Hallador Energy Company, received an imminent danger order under Section 107(a) of the Mine Act at Oaktown Fuels, Mine No. 1 ("Oaktown"), located in Knox County, Indiana (MSHA ID# 12-02394). On that date, an MSHA representative alleged that the employee of an independent trucking company was observed climbing onto an elevated position on the side of a truck bed without wearing fall protection. The order required the employee of the independent contractor to immediately climb down from the truck. No injuries resulted from the condition; no employees of Sunrise Coal were affected and production at the mine was not interrupted. Sunrise Coal disputes the issuance of an imminent danger order to it, given that the alleged imminent danger condition was created solely by the acts or omissions of an independent contractor operating on the mine site and reserves the right to contest the order and any related citation or proposed assessment.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


		Hallador Energy Company



June 3, 2026	By:	/s/ERIC VAN DEMAN
		Eric Van Deman Chief Accounting Officer

Source: View Original Filing on SEC EDGAR

FAQ

What did Hallador Energy Company (HNRG) report in this 8-K filing?

Hallador Energy Company reported that its subsidiary Sunrise Coal received an imminent danger order from MSHA at Oaktown Fuels Mine No. 1 in Indiana. The order arose from an alleged safety issue involving an independent trucking company employee without fall protection.

Why did Sunrise Coal receive an MSHA imminent danger order at Oaktown Mine No. 1?

MSHA issued the imminent danger order after alleging an employee of an independent trucking company was seen on an elevated truck bed without fall protection. The order required the contractor’s employee to immediately climb down from the truck to address the alleged safety condition.

Were there any injuries or production impacts at Hallador’s Oaktown mine from this incident?

No injuries resulted from the incident at Oaktown Fuels Mine No. 1, according to Hallador. The company also stated that no Sunrise Coal employees were affected and that production at the mine was not interrupted by the MSHA imminent danger order.

How is Sunrise Coal responding to the MSHA imminent danger order described by Hallador (HNRG)?

Sunrise Coal disputes the issuance of the imminent danger order, arguing the alleged condition was created solely by an independent contractor. The subsidiary reserves the right to contest the order, as well as any related citation or proposed assessment, through available procedures.

Which mine and location are involved in Hallador Energy’s reported MSHA order?

The incident occurred at Oaktown Fuels, Mine No. 1, operated by Sunrise Coal, a Hallador subsidiary. The mine is located in Knox County, Indiana and is identified by MSHA as Mine ID number 12-02394 in the company’s disclosure.

What law requires Hallador Energy to report mine safety orders like this one?

Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act requires companies to report mine safety events, including imminent danger orders issued under Section 107(a) of the Federal Mine Safety and Health Act of 1977, prompting Hallador’s current disclosure.

Filing Exhibits & Attachments

4 documents