PAR PACIFIC HOLDINGS, INC.

Operating Statistics

The following table summarizes key operational data:

(1)We calculate Adjusted Gross Margin per barrel by dividing Adjusted Gross Margin by total refining throughput. Adjusted Gross Margin for our Washington refinery is determined under the last-in, first-out (“LIFO”) inventory costing method. Adjusted Gross Margin for our other refineries is determined under the first-in, first-out (“FIFO”) inventory costing method. Total Refining Segment Adjusted Gross Margin per barrel is presented net of intercompany profit in inventory per barrel, which represents margin on intercompany sales where the inventory remains on our consolidated balance sheet at period end. Intercompany profit in inventory per barrel for the years ended December 31, 2025, 2024, and 2023 was immaterial. Intercompany profit in inventory per barrel for the three months ended December 31, 2025 was ($0.32). For the year ended December 31, 2025, Adjusted Gross Margin per barrel includes the SRE impact related to the 2019 through 2024 compliance years.

(2)Management uses production costs per barrel to evaluate performance and compare efficiency to other companies in the industry. There are a variety of ways to calculate production costs per barrel; different companies within the industry calculate it in different ways. We calculate production costs per barrel by dividing all direct production costs, which include the costs to run the refineries, including personnel costs, repair and maintenance costs, insurance, utilities, and other miscellaneous costs, by total refining throughput. Our production costs are included in Operating expense (excluding depreciation) on our consolidated statements of operations, which also includes costs related to our bulk marketing operations and severance costs.

(3)Beginning in 2025, we established the Hawaii Index as a new benchmark for our Hawaii operations. We believe the Hawaii Index, which incorporates market cracks and landed crude differentials, better reflects the key drivers impacting our Hawaii refinery’s financial performance compared to prior reported market indices. The Hawaii Index is calculated as the Singapore 3.1.2 Product Crack, or one part gasoline (RON 92) and two parts distillates (Sing Jet & Sing gasoil) as created from a barrel of Brent crude oil, less the Par Hawaii Refining, LLC (“PHR”) crude differential.

(4)Beginning in 2025, we established the Montana Index as a new benchmark for our Montana refinery. We believe the Montana Index, which incorporates local market cracks, regional crude oil prices, and management’s estimates for other costs of sales, better reflects the key drivers impacting our Montana refinery’s financial performance compared to prior reported market indices. Beginning in 2025, market cracks have been updated to reflect local market product pricing, which better reflects our Montana refinery’s refined product sales price compared to prior reported market indices. The Montana Index is calculated as the Montana 6.3.2.1 Product Crack less Montana crude costs, less other costs of sales, including inflation-adjusted product delivery costs, yield loss expense, taxes and tariffs, and product discounts. The Montana 6.3.2.1 Product Crack is calculated by taking three parts gasoline (Billings E10 and Spokane E10), two parts distillate (Billings ULSD and Spokane ULSD), and one part asphalt (Rocky Mountain Rail Asphalt) as created from a barrel of WTI crude oil, less 100% of the RVO cost for gasoline and ULSD. Asphalt pricing is lagged by one month. The Montana crude cost is calculated as 60% WCS differential to WTI, 20% MSW differential to WTI, and 20% Syncrude differential to WTI. The Montana crude cost is lagged by three months and includes an inflation-adjusted crude delivery cost. Other costs of sales and crude delivery costs are based on historical averages and management’s estimates.

(5)Beginning in 2025, we established the Washington Index as a new benchmark for our Washington refinery. We believe the Washington Index, which incorporates local market cracks, regional crude oil prices, and management’s estimates for other costs of sales, better reflects the key drivers impacting our Washington refinery’s financial performance compared to prior reported market indices. Beginning in 2025, market cracks have been updated to reflect local market product pricing, which better reflects our Washington refinery’s refined product sales price compared to prior reported market indices. The Washington Index is calculated as the Washington 3.1.1.1 Product Crack, less Washington crude costs, less other costs of sales, including inflation-adjusted product delivery costs, yield loss expense and state and local taxes. The Washington 3.1.1.1 Product Crack is calculated by taking one part gasoline (Tacoma E10), one part distillate (Tacoma ULSD) and one part secondary products (USGC VGO and Rocky Mountain Rail Asphalt) as created from a barrel of WTI crude oil, less 100% of the RVO cost for gasoline and ULSD. Asphalt pricing is lagged by one month. The Washington crude cost is calculated as 67% Bakken Williston differential to WTI and 33% WCS Hardisty differential to WTI. The Washington crude cost is lagged by one month and includes an inflation-adjusted crude delivery cost. Other costs of sales and crude delivery costs are based on historical averages and management’s estimates.

(6)Beginning in 2025, we established the Wyoming Index as a new benchmark for our Wyoming refinery. We believe the Wyoming Index, which incorporates local market cracks, regional crude oil prices, and management’s estimates for other costs of sales, better reflects the key drivers impacting our Wyoming refinery’s financial performance compared to prior reported market indices. Beginning in 2025, market cracks have also been updated to reflect local market product pricing, which better reflects our Wyoming refinery’s refined product sales price compared to prior reported market indices. The Wyoming Index is calculated as the Wyoming 2.1.1 Product Crack, less Wyoming crude costs, less other cost of sales, including inflation adjusted product delivery costs and yield loss expense, based on historical averages and management’s estimates. The Wyoming 2.1.1 Product Crack is calculated by taking one part gasoline (Rockies gasoline) and one part distillate (USGC ULSD and USGC Jet) as created from a barrel of WTI crude oil, less 100% of the RVO cost for gasoline and ULSD. The Wyoming crude cost is calculated as the Bakken Guernsey differential to WTI on a one-month lag.

(7)Beginning in 2025, we established the Combined Index as a new benchmark for our refining segment. The Combined Index provides a wholistic view of key drivers impacting our refining segment’s financial performance and is calculated as the throughput-weighted average of each regional index for periods under our ownership.

(8)Beginning in 2025, crude oil prices have been updated and expanded to reflect regional differentials to Brent and WTI, which better reflect our refineries’ feedstock costs compared to prior crude oil pricing.