#1 Restricted stock units granted under the HollyFrontier Corporation Long-Term Incentive Plan. The restricted stock units vest in three equal annual installments beginning December 1, 2021, provided that the reporting person remains in the employ of the Issuer from the grant date through each such vesting date. The vested restricted stock units will be paid within 30 days following the vesting date in the form of the Issuer's common stock equal to the number of vested restricted stock units.

#1 Restricted stock units granted under the HollyFrontier Corporation 2020 Long Term Incentive Plan. The restricted stock units vest in three equal annual installments beginning December 1, 2022, provided that the reporting person remains in the employ of the Issuer from the grant date through each such vesting date. The vested restricted stock units will be paid within 30 days following the vesting date in the form of the Issuer's common stock equal to the number of vested restricted stock units.

#1 These shares were deemed issued to the reporting person to settle performance share units that were not derivative securities under the Issuer's Long-Term Incentive Compensation Plan.

#2 These shares were deemed surrendered to satisfy the reporting person's tax liability incident to the issuance of the 1,223 shares reported on the line above.

#3 These shares were deemed surrendered to satisfy the reporting person's tax liability incident to the vesting of restricted stock unit grants previously reported.

#1 These shares were deemed issued to the reporting person to settle performance share units that were not derivative securities under the Issuer's Long-Term Incentive Compensation Plan.

#2 These shares were deemed surrendered to satisfy the reporting person's tax liability incident to the issuance of the 1,223 shares reported on the line above.

#3 These shares were deemed surrendered to satisfy the reporting person's tax liability incident to the vesting of restricted stock unit grants previously reported.