UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 10-K [ x ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2019 OR ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT O F 1934 Commission file number: 001‑3473 "COAL KEEPS YOUR LIGHTS ON" "COAL KEEPS YOUR LIGHTS ON" HALLADOR ENERGY COMPANY (www.halladorenergy.com) Colorado 84-1014610 (State of incorporation) (IRS Employer I ...

Hallador Energy Company (NASDAQ:HNRG) Q3 2019 Earnings Conference Call November 5, 2019 2:00 PM ET Company Participants Becky Palumbo - Vice President of Corporate Affairs Brent Bilsland - President and Chief Executive Officer Larry Martin - Chief Financial Officer Conference Call Participants Daniel Day - B. Riley FBR Ethan Park - Extract Capital Scott Caufield - Pacific Value Arthur Calavritinos - ANC Capital Operator Good day, and welcome to Hallador Energy's Third Quarter 2019 Earnings Conference Call. ...

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: September 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) 84-1 ...

Hallador Energy Company (NASDAQ:HNRG) Q2 2019 Earnings Conference Call August 6, 2019 2:00 PM ET Company Participants Rebecca Palumbo - Director of Investor Relations Brent Bilsland - Chairman of the Board, Chief Executive Officer and President Lawrence Martin - Chief Financial Officer and Chief Accounting Officer Conference Call Participants Lucas Pipes - B.Riley FBR Operator Presentation Good afternoon, and welcome to the Hallador Energy's Second Quarter 2019 Earnings Conference Call. All participants wil ...

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. ...