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Phillips 66

For the period ended Dec 31, 2023. Filed Feb 21, 2024.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2023 · Filed Feb 21, 2024

PSX$250.70-0.9%Stored close · as of Nov 10, 2026

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Contents

Reports of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Phillips 66

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Phillips 66 (the Company) as of December 31, 2023 and 2022, the related consolidated statements of income, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2023, and the related notes (collectively referred to as the “financial statements”). In our opinion, based on our audits and, for 2023 and 2022, the report of other auditors, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with U.S. generally accepted accounting principles.

We did not audit the 2023 and 2022 financial statements of DCP Midstream, LP (DCP LP), a consolidated subsidiary, which reflect total assets constituting approximately 14% and 18% at December 31, 2023 and 2022 respectively, and total revenues constituting approximately 4% in 2023 and 3% in 2022 for the years then ended. Those statements were audited by other auditors whose report has been furnished to us, and our opinion, insofar as it relates to the amounts included for DCP LP for 2023 and 2022, is based solely on the report of the other auditors.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 21, 2024 expressed an unqualified opinion thereon.

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the report of other auditors provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit and finance committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Impairment Assessment of Certain Equity Method Investments
Description of the MatterAs discussed in Note 1 to the consolidated financial statements, the Company assesses investments in nonconsolidated entities accounted for under the equity method for impairment when changes in the facts and circumstances indicate a loss in value has occurred.As discussed in Note 8 to the consolidated financial statements, the Company owns a 50% interest in WRB Refining LP (WRB), a joint venture that owns the Wood River and Borger refineries. The carrying value of the Company’s investment in WRB was $2.7 billion as of December 31, 2023. WRB’s earnings are subject to variability as they are dependent on market conditions, as well as the utilization of its refineries. Accordingly, significant judgment is required in determining whether events or changes in circumstances indicate a loss in value may have occurred that is indicative of a possible impairment.We determined that the identification and evaluation of events or changes in circumstances indicating that the carrying value of the investment in WRB may not be recoverable is a critical audit matter because of the judgement and assumptions management uses to perform its identification and evaluation of such factors.
How We Addressed the Matter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s process for identifying and evaluating events or changes in circumstances that would indicate that the carrying value of the investment in WRB may not be recoverable and performed a walkthrough of the Company’s process and controls. Our evaluation of the Company’s analysis included an assessment of whether events or changes in circumstances indicating that the carrying value of the investment in WRB may not be recoverable were appropriately identified and evaluated by the Company. This included, but was not limited to, an evaluation of the investee’s earnings history and an evaluation of the sustainability of the investee’s earnings under current and expected market conditions. We exercised professional judgment based on our knowledge of the industry and the investee’s business to assess the appropriateness of management’s evaluation and conclusions. For example, we performed inquiries of management, considered WRB’s historical operating results, reviewed the projected investment recovery period, and assessed current and expected market conditions affecting WRB’s results. We performed an independent assessment using both internally and externally available information, such as utilization and margins for WRB’s and other regional refineries, as well as forecasted prices, market crack spreads and demand. We also considered other information, such as the Company’s internal valuations, to identify evidence contrary to management’s conclusion. Additionally, we evaluated management’s process to accurately forecast future operating income by comparing actual results to budgeted results.

/s/Ernst & Young LLP

We have served as the Company’s auditor since 2011.

Houston, Texas

To the Board of Directors and Stockholders of Phillips 66

Opinion on Internal Control over Financial Reporting

We have audited Phillips 66’s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Phillips 66 (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on the COSO criteria.

We did not examine the effectiveness of internal control over financial reporting of DCP Midstream, LP whose financial statements reflect total assets and sales constituting 14% and 4%, respectively, of the related consolidated financial statement amounts as of and for the year ended December 31, 2023. The effectiveness of DCP Midstream, LP’s internal control over financial reporting was audited by other auditors whose report has been furnished to us, and our opinion, insofar as it relates to the effectiveness of DCP Midstream, LP’s internal control over financial reporting, is based solely on the report of the other auditors.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2023 and 2022, the related consolidated statements of income, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2023, and the related notes and our report dated February 21, 2024, expressed an unqualified opinion thereon, based on our audit and the report of the other auditors.

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included under the heading “Assessment of Internal Control Over Financial Reporting” in the accompanying “Report of Management.” Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Houston, Texas

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