UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (IRS Employer Identification No.) (Address of principal executive offices, including zip code) Registrant's telephone number, including area code: (801) 345-1000 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _ ...