The principal and carrying amounts of Long-term debt are as follows: | | | | | | | | | | | | | | | | | | | | | | | | | Carrying Amount (1) | | | Maturity Date | | June 30, 2026 | | December 31, 2025 | | | | | | | | | | | | (In millions) | | HF Sinclair Senior Notes: | | | | | | | 5.000% Senior Notes | | February 2028 | | $ | 499 | | | $ | 499 | | 4.500% Senior Notes | | October 2030 | | 325 | | | 325 | | 5.750% Senior Notes | | January 2031 | | 650 | | | 650 | | 5.500% Senior Notes | | September 2032 | | 500 | | | 500 | | 6.250% Senior Notes | | January 2035 | | 750 | | | 750 | | | | | | 2,724 | | | 2,724 | | | HollyFrontier Senior Notes: | | | | | 4.500% Senior Notes | | October 2030 | | 75 | | | 75 | | | | | | 75 | | | 75 | | | HEP Senior Notes: | | | | | | | 5.000% Senior Notes | | February 2028 | | 1 | | | 1 | | | | | | 1 | | | 1 | | | Total Senior Notes | | | | 2,800 | | | 2,800 | | | | | | | | | HF Sinclair Credit Agreement | | April 2030 | | — | | | — | | | | | | — | | | — | | | Total debt at face value | | | | $ | 2,800 | | | $ | 2,800 | | | Unamortized discount and debt issuance costs | | | | (28) | | | (31) | | | Long-term debt | | | | $ | 2,772 | | | $ | 2,769 | |
(1)As of June 30, 2026 and December 31, 2025, the carrying amounts of our Senior Notes equaled the principal amounts.
The fair values of the senior notes are as follows: | | | | | | | | | | | | | | | | | June 30, 2026 | | December 31, 2025 | | | | | | | | (In millions) | | HF Sinclair, HollyFrontier and HEP Senior Notes | | $ | 2,834 | | | $ | 2,858 | |
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