In March 2021, we announced our participation in a then-proposed large-scale carbon capture and sequestration pipeline system with Navigator Energy Services (Navigator). In October 2023, Navigator announced that it decided to cancel this project. Under the terms of the agreements associated with the project, we have some rights from and obligations to Navigator, including a portion of the aggregate project costs to date. As a result, we recognized a charge of $29 million in the three months ended March 31, 2024 related to our expected obligation to Navigator.

"Other income, net" includes a net gain of $11 million in the three months ended March 31, 2023 related to the early retirement of $199 million aggregate principal amount of various series of our senior notes.

We use certain financial measures (as noted below) in the earnings release tables and accompanying earnings release that are not defined under GAAP and are considered to be non-GAAP measures.

We have defined these non-GAAP measures and believe they are useful to the external users of our financial statements, including industry analysts, investors, lenders, and rating agencies. We believe these measures are useful to assess our ongoing financial performance because, when reconciled to their most comparable GAAP measures, they provide improved comparability between periods after adjusting for certain items that we believe are not indicative of our core operating performance and that may obscure our underlying business results and trends. These non-GAAP measures should not be considered as alternatives to their most comparable GAAP measures nor should they be considered in isolation or as a substitute for an analysis of our results of operations as reported under GAAP. In addition, these non-GAAP measures may not be comparable to similarly titled measures used by other companies because we may define them differently, which diminishes their utility.

Non-GAAP measures are as follows:

• Adjusted net income attributable to Valero Energy Corporation stockholders is defined as net income attributable to Valero Energy Corporation stockholders adjusted to reflect the items noted below, along with their related income tax effect. The income tax effect for the adjustments was calculated using a combined U.S. federal and state statutory rate of 22.5 percent. We have adjusted for these items because we believe that they are not indicative of our core operating performance and that their adjustment results in an important measure of our ongoing financial performance to better assess our underlying business results and trends. The basis for our belief with respect to each adjustment is provided below.

- Project liability adjustment - The project liability adjustment related to the cancellation of Navigator's project (see note (a) is not indicative of our ongoing operations.

- Gain on early retirement of debt - Discounts, premiums, and other expenses recognized in connection with the early retirement of various series of our senior notes (see note (b) are not associated with the ongoing costs of our borrowing and financing activities.

• Adjusted earnings per common share - assuming dilution is defined as adjusted net income attributable to Valero Energy Corporation stockholders divided by the number of weighted-average shares outstanding in the applicable period, assuming dilution.

• Refining margin is defined as Refining segment operating income excluding operating expenses (excluding depreciation and amortization expense), depreciation and amortization expense, and other operating expenses. We believe Refining margin is an important measure of our Refining segment's operating and financial performance as it is the most comparable measure to the industry's market reference product margins, which are used by industry analysts, investors, and others to evaluate our performance.

• Renewable Diesel margin is defined as Renewable Diesel segment operating income excluding operating expenses (excluding depreciation and amortization expense) and depreciation and amortization expense. We believe Renewable Diesel margin is an important measure of our Renewable Diesel segment's operating and financial performance as it is the most comparable measure to the industry's market reference product margins, which are used by industry analysts, investors, and others to evaluate our performance.

• Ethanol margin is defined as Ethanol segment operating income excluding operating expenses (excluding depreciation and amortization expense), depreciation and amortization expense, and other operating expenses. We believe Ethanol margin is an important measure of our Ethanol segment's operating and financial performance as it is the most comparable measure to the industry's market reference product margins, which are used by industry analysts, investors, and others to evaluate our performance.

• Adjusted Refining operating income is defined as Refining segment operating income excluding other operating expenses. We believe adjusted Refining operating income is an important measure of our Refining segment's operating and financial performance because it excludes items that are not indicative of that segment's core operating performance.

• Adjusted Ethanol operating income is defined as Ethanol segment operating income excluding other operating expenses. We believe adjusted Ethanol operating income is an important measure of our Ethanol segment's operating and financial performance because it excludes items that are not indicative of that segment's core operating performance.

• Adjusted net cash provided by operating activities is defined as net cash provided by operating activities excluding the items noted below. We believe adjusted net cash provided by operating activities is an important measure of our ongoing financial performance to better assess our ability to generate cash to fund our investing and financing activities. The basis for our belief with respect to each excluded item is provided below.

- Changes in current assets and current liabilities - Current assets net of current liabilities represents our operating liquidity. We believe that the change in our operating liquidity from period to period does not represent cash generated by our operations that is available to fund our investing and financing activities.

- DGD's adjusted net cash provided by operating activities attributable to the other joint venture member's ownership interest in DGD - We are a 50 percent joint venture member in DGD and we consolidate DGD's financial statements. Our Renewable Diesel segment includes the operations of DGD and the associated activities to market its products. Because we consolidate DGD's financial statements, all of DGD's net cash provided by operating activities (or operating cash flow) is included in our consolidated net cash provided by operating activities.

DGD's members use DGD's operating cash flow (excluding changes in its current assets and current liabilities) to fund its capital investments rather than distribute all of that cash to themselves. Nevertheless, DGD's operating cash flow is effectively attributable to each member and only 50 percent of DGD's operating cash flow should be attributed to our net cash provided by operating activities. Therefore, we have adjusted our net cash provided by operating activities for the portion of DGD's operating cash flow attributable to the other joint venture member's ownership interest because we believe that it more accurately reflects the operating cash flow available to us to fund our investing and financing activities. The adjustment is calculated as follows (in millions):

• Capital investments attributable to Valero is defined as all capital expenditures and deferred turnaround and catalyst cost expenditures presented in our consolidated statements of cash flows, excluding the portion of DGD's capital investments attributable to the other joint venture member and all of the capital expenditures of VIEs other than DGD.

DGD's members use DGD's operating cash flow (excluding changes in its current assets and current liabilities) to fund its capital investments rather than distribute all of that cash to themselves. Because DGD's operating cash flow is effectively attributable to each member, only 50 percent of DGD's capital investments should be attributed to our net share of total capital investments. We also exclude the capital expenditures of other VIEs that we consolidate because we do not operate those VIEs. We believe capital investments attributable to Valero is an important measure because it more accurately reflects our capital investments.

The Refining segment regions reflected herein contain the following refineries: U.S. Gulf Coast- Corpus Christi East, Corpus Christi West, Houston, Meraux, Port Arthur, St. Charles, Texas City, and Three Rivers Refineries; U.S. Mid Continent- Ardmore, McKee, and Memphis Refineries; North Atlantic- Pembroke and Quebec City Refineries; and U.S. West Coast- Benicia and Wilmington Refineries.

Primarily includes petrochemicals, gas oils, No. 6 fuel oil, petroleum coke, sulfur, and asphalt.

Valero uses certain operating statistics (as noted below) in the earnings release tables and the accompanying earnings release to evaluate performance between comparable periods. Different companies may calculate them in different ways.

All per barrel of throughput, per gallon of sales, and per gallon of production amounts are calculated by dividing the associated dollar amount by the throughput volumes, sales volumes, and production volumes for the period, as applicable.

Throughput volumes, sales volumes, and production volumes are calculated by multiplying throughput volumes per day, sales volumes per day, and production volumes per day (as provided in the accompanying tables), respectively, by the number of days in the applicable period. We use throughput volumes, sales volumes, and production volumes for the Refining segment, Renewable Diesel segment, and Ethanol segment, respectively, due to their general use by others who operate facilities similar to those included in our segments. We believe the use of such volumes results in per unit amounts that are most representative of the product margins generated and the operating costs incurred as a result of our operation of those facilities.

The RVO cost represents the average market cost on a per barrel basis to comply with the Renewable Fuel Standard program. The RVO cost is calculated by multiplying (i) the average market price during the applicable period for the RINs associated with each class of renewable fuel (i.e., biomass-based diesel, cellulosic biofuel, advanced biofuel, and total renewable fuel) by (ii) the quotas for the volume of each class of renewable fuel that must be blended into petroleum-based transportation fuels consumed in the U.S., as set or proposed by the U.S. Environmental Protection Agency, on a percentage basis for each class of renewable fuel and adding together the results of each calculation.