Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 001‑34743 "COAL KEEPS YOUR LIGHTS ON" "COAL KEEPS YOUR LIGHTS ON" HALLADOR ENERGY COMPANY (www.halladorenergy.com) Colorado (State of incorporation) 1183 Eas ...

Hallador Energy Company (NASDAQ:HNRG) Q1 2019 Results Conference Call May 7, 2019 2:00 PM ET Company Participants Becky Palumbo - Director of Investor Relations Brent Bilsland - President and CEO Larry Martin - CFO Conference Call Participants Lucas Pipes - B. Riley Ethan Park - Extract Capital Operator Good day, and welcome to the Hallador Energy First Quarter 2019 Earnings Conference Call. All participants will be in listen-only mode. [Operator Instructions] Please note, this event is being recorded. I wo ...

FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 001-34743 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 "COAL KEEPS YOUR LIGHTS ON" "COAL KEEPS YOUR LIGHTS ON" HALLADOR ENERGY COMPANY (www.halladorenergy.com) Colorado 84-1014610 (State of incorporation) (IRS Employer ...

Hallador Energy Co (NASDAQ:HNRG) Q4 2018 Earnings Conference Call March 12, 2019 2:00 PM ET Company Participants Becky Palumbo - Director of Investor Relations Brent Bilsland - President and Chief Executive Officer Lawrence Martin - Chief Financial Officer Conference Call Participants Lucas Pipes - B Riley FBR Ethan Park - Extract Capital Operator Good day, and welcome to the Hallador Energy’s 2018 Full-year Earnings Conference Call and Webcast. All participants will be in listen-only mode. [Operator Instru ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 10-K x ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2018 OR ¨ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 001-3473 "COAL KEEPS YOUR LIGHTS ON" "COAL KEEPS YOUR LIGHTS ON" HALLADOR ENERGY COMPANY (www.halladorenergy.com) Colorado (State of incorporation) 84-1014610 (IRS Employer Identification No. ...