Sunoco LP

6. Inventories, net

Fuel inventories included balances stated at the lower of cost or market using the LIFO method, except for certain fuel inventories in the Caribbean, as discussed below. As of June 30, 2026 and December 31, 2025, the Partnership’s fuel inventory balance included lower of cost or market reserves of $19 million and $472 million, respectively. For the three months ended June 30, 2026 and 2025, the Partnership's cost of sales included unfavorable inventory valuation adjustments of $18 million and $40 million, respectively, which decreased net income. For the six months ended June 30, 2026 and 2025, the Partnership’s cost of sales included favorable inventory valuation adjustments of$426 million and $21 million, respect ively, which increased net income.

Inventories, net, consisted of the following:

During the three months ended March 31, 2026, the Partnership reduced its overall fuel inventories, resulting in a LIFO liquidation. Based on the assumed impact to cost of sales if the liquidated inventories had been replaced, the effect of the LIFO liquidation was an increase of $102 million to pre-tax income, or $0.54 per common unit (excluding any income tax impact or any assumed changes to distributions) for the six months ended June 30, 2026, with no impact to the three months ended June 30, 2026. Interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs;

consequently, these interim estimates are subject to changes during the remainder of the year that could impact the final year-end inventory levels or valuation.

Certain of the Partnership’s fuel inventories in the Caribbean are stated at the lower of cost or market using the first-in, first-out method, under which the cost of fuel sold consists of older acquisition costs, including transportation and storage costs. These FIFO method inventories totaled $145 million and $88 million as of June 30, 2026 and December 31, 2025, respectively.