October 31, 2020

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HollyFrontier Corporation Third Quarter 2020 Earnings Release and Conference Webcast

DALLAS--(BUSINESS WIRE)--HollyFrontier Corporation (NYSE: HFC) (the "Company") plans to announce results for its quarter ending September 30, 2020 on November 5, 2020, before the opening of trading on the NYSE. The Company has scheduled a webcast conference on November 5, 2020 at 8:30 a.m. Eastern time to discuss financial results. This webcast may be accessed at: https://event.on24.com/wcc/r/2628168/9BE4DA1E13C98135F6352CD76762D475 An audio archive of this webcast will be available using the above noted link through November 19, 2020. About HollyFrontier Corporation: HollyFrontier Corporation, headquartered in Dallas, Texas, is an independent petroleum refiner and marketer that produces high value light products such as gasoline, diesel fuel, jet fuel and other specialty products. HollyFrontier owns and operates refineries located in Kansas, Oklahoma, New Mexico, and Utah and markets its refined products principally in the Southwest U.S., the Rocky Mountains extending into the Pacific Northwest and in other neighboring Plains states. In addition, HollyFrontier produces base oils and other specialized lubricants in the U.S., Canada and the Netherlands, and exports products to more than 80 countries. HollyFrontier also owns a 57% limited partner interest and a non-economic general partner interest in Holly Energy Partners, L.P., a master limited partnership that provides petroleum product and crude oil transportation, terminalling, storage and throughput services to the petroleum industry, including HollyFrontier Corporation subsidiaries. Contacts HollyFrontier Corporation Craig Biery, 214-954-6510 Vice President, Investor Relations or Trey Schonter, 214-954-6510 Investor Relations

DALLAS–(BUSINESS WIRE)–HollyFrontier Corporation (NYSE: HFC) (the "Company") plans to announce results for its quarter ending September 30, 2020 on November 5, 2020, before the opening of trading on the NYSE. The Company has scheduled a webcast conference on November 5, 2020 at 8:30 a.m. Eastern time to discuss financial results.

This webcast may be accessed at:

https://event.on24.com/wcc/r/2628168/9BE4DA1E13C98135F6352CD76762D475

An audio archive of this webcast will be available using the above noted link through November 19, 2020.

About HollyFrontier Corporation:

HollyFrontier Corporation, headquartered in Dallas, Texas, is an independent petroleum refiner and marketer that produces high value light products such as gasoline, diesel fuel, jet fuel and other specialty products. HollyFrontier owns and operates refineries located in Kansas, Oklahoma, New Mexico, and Utah and markets its refined products principally in the Southwest U.S., the Rocky Mountains extending into the Pacific Northwest and in other neighboring Plains states. In addition, HollyFrontier produces base oils and other specialized lubricants in the U.S., Canada and the Netherlands, and exports products to more than 80 countries. HollyFrontier also owns a 57% limited partner interest and a non-economic general partner interest in Holly Energy Partners, L.P., a master limited partnership that provides petroleum product and crude oil transportation, terminalling, storage and throughput services to the petroleum industry, including HollyFrontier Corporation subsidiaries.

Contacts

HollyFrontier Corporation

Craig Biery, 214-954-6510

Vice President, Investor Relations

or

Trey Schonter, 214-954-6510

Investor Relations

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