# EDGAR Filing Document

**Accession Number:** 0000788965
**File Stem:** 0001104659-26-036234
**Filing Date:** 2026-3
**Character Count:** 5259
**Document Hash:** 01c8086b2438a3a9aeff27d80d7623bd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-036234.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001104659-26-036234

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260325

**ITEM INFORMATION**: Mine Safety - Reporting of Shutdowns and Patterns of Violations

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HALLADOR ENERGY CO
- **CENTRAL INDEX KEY:** 0000788965
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 841014610
- **STATE OF INCORPORATION:** CO
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34743
- **FILM NUMBER:** 26808563

**BUSINESS ADDRESS:**
- **STREET 1:** 1183 EAST CANVASBACK DRIVE
- **CITY:** TERRE HAUTE
- **STATE:** IN
- **ZIP:** 47802
- **BUSINESS PHONE:** 303-839-5504

**MAIL ADDRESS:**
- **STREET 1:** 1183 EAST CANVASBACK DRIVE
- **CITY:** TERRE HAUTE
- **STATE:** IN
- **ZIP:** 47802

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HALLADOR PETROLEUM CO
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KIMBARK OIL & GAS CO /CO/
- **DATE OF NAME CHANGE:** 19900102

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KIMBARK INC
- **DATE OF NAME CHANGE:** 19860624

?xml version='1.0' encoding='ASCII'? Hallador Energy Company_March 25, 2026

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): March 25, 2026

![Graphic](hnrg-20260325x8k001.jpg)

**Hallador Energy Company**

(Exact name of registrant as specified in its charter)

Colorado 001-34743 84-1014610 <br> (State or other jurisdictionof incorporation) (Commission File Number) (IRS EmployerIdentification No.)

1183 East Canvasback Drive, Terre Haute, Indiana 47802 <br> (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))

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

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol | Name of each exchange<br>on which registered |
| Common Shares, $.01 par value | HNRG | Nasdaq |

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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 March 25, 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 an electrician was performing electrical work on a piece of equipment that was not de-energized. The order required the electrician to cease working until the equipment was de-energized. Oaktown personnel immediately de-energized the equipment. No injuries resulted from the condition and production at the mine was not interrupted. The Company disagrees that the condition constitutes an imminent danger under the Mine Act and intends to contest the 107(a) order.

**Item 9.01 – Financial Statements and Exhibits**

**(d) Exhibits**

104 – Cover Page Interactive Data File (embedded within the Inline XBRL document)

**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.

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| | | |
|:---|:---|:---|
| Date: March 27, 2026 | By: | /s/ TODD E. TELESZ |
|  |  | Todd E. Telesz<br>CFO |

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