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February 14, 2017
HollyFrontier Corporation Statement on the Passing of Board Member, Tommy A. Valenta

DALLAS--(BUSINESS WIRE)-- HollyFrontier Corporation (NYSE: HFC) ("HollyFrontier") is sad to announce the passing of Tommy A. Valenta.

Mr. Valenta served on the Board of Directors for HollyFrontier since 2010. He was an independent director and a member of the Audit and Environmental, Health, Safety, and Public Policy Committees.

"We are deeply saddened by the passing of our colleague and friend," said George Damiris, Chief Executive Officer and President. "On behalf of the entire HollyFrontier team, we extend our deepest condolences to his family and friends. Tommy's vast experience and principled guidance were invaluable to his fellow directors, our management team and our company. He touched so many lives as a willing mentor, a selfless and loyal friend, and an avid community supporter. We will greatly miss him and his contributions."

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 operates through its subsidiaries a 135,000 barrels per stream day ("bpsd") refinery located in El Dorado, Kansas, a 125,000 bpsd refinery in Tulsa, Oklahoma, a 100,000 bpsd refinery located in Artesia, New Mexico, a 52,000 bpsd refinery located in Cheyenne, Wyoming and a 45,000 bpsd refinery in Woods Cross, Utah. HollyFrontier 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, through its subsidiary, owns Petro-Canada Lubricants Inc., whose Mississauga, Ontario facility produces 15,600 barrels per day of base oils and other specialized lubricant products, and owns a 37% interest (including a 2% general partner interest) in Holly Energy Partners, L.P.

Information about the Company may be found on its website at www.hollyfrontier.com.

HollyFrontier Corporation
Julia Heidenreich, 214-954-6510
Vice President, Investor Relations
Craig Biery, 214-954-6510
Manager, Investor Relations

Source: HollyFrontier Corporation

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