Phillips 66 10-K 2023-12-31

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FORM 10-K

Commission file number: 001-35349

2331 CityWest Blvd., Houston, Texas 77042

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: 832-765-3010

The aggregate market value of common stock held by non-affiliates of the registrant on June 30, 2023, the last business day of the registrant’s most recently completed second fiscal quarter, based on the closing price on that date of $95.38, was $42.4 billion. The registrant, solely for the purpose of this required presentation, had deemed its Board of Directors and executive officers to be affiliates, and deducted their stockholdings in determining the aggregate market value.

The registrant had 427,824,429 shares of common stock outstanding at January 31, 2024.

Documents incorporated by reference:

Portions of the Proxy Statement for the Annual Meeting of Stockholders to be held on May 15, 2024 (Part III).

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TABLE OF CONTENTS

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You should carefully consider the following risk factors in addition to the other information included in this Annual Report on Form 10-K. Each of these risk factors could adversely affect our business, operating results and financial condition, as well as the value of an investment in our common stock. These risk factors do not identify all risks that we face; our operations could also be affected by factors, events or uncertainties that are not presently known to us or that we do not currently consider to present significant risks to our operations.

Risks Related to Our Manufacturing and Operations

Market conditions, including volatile commodity prices, margins and demand for refined petroleum, petrochemical and plastics products, impact our earnings, financial condition and cash flows.

Similar to other companies in the industry in which we operate, our financial results are largely affected by the relationship, or margin, between the prices at which we sell refined petroleum, petrochemical and plastics products and the prices for crude oil and other feedstocks used in manufacturing these products. Historically, margins have been volatile, and we expect they will continue to be volatile in the future.

The cost of feedstocks and the prices at which we can ultimately sell our products depend on numerous factors beyond our control, including regional and global supply and demand, which are subject to, among other things, production levels, levels of refined petroleum product inventories, productivity and growth of economies, geopolitical risks, such as turmoil in the Middle East, Eastern Europe, and other producing regions, technology advancements and the pace of the energy transition, weather-related damage and disruptions due to other natural or human causes, consumer preferences and the use and availability of substitute products, and governmental regulation. We do not produce crude oil and other feedstocks and must purchase all of the feedstocks we process. The prices for crude oil and refined petroleum products can fluctuate based on global, regional and local market conditions, as well as by type and class of products, which can reduce margins and have a significant impact on our refining, wholesale marketing and retail operations, revenues, operating income and cash flows. The ability of the members of the Organization of Petroleum Exporting Countries (OPEC) to agree on and to maintain crude oil price and production controls and changes in trade flows from events such as the Russia-Ukraine war have also had, and are likely to continue to have, a significant impact on the market prices of crude oil and certain of our products. Also, crude oil supply contracts generally have market-based pricing provisions. We normally purchase our refinery feedstocks weeks before manufacturing and selling the refined petroleum products. We also purchase refined petroleum products produced by others for sale to our customers. Changes in prices that occur between the time we purchase feedstocks or products and when we sell the refined petroleum products could have a significant effect on our financial results.

The price of natural gas and crude oil also influences prices for the petrochemical and plastics products we produce and the feedstocks used to manufacture those products. Our Chemicals segment uses feedstocks that are derivatively produced in the processing of natural gas and refining of crude oil, and those feedstock prices can fluctuate widely for a variety of reasons, including changes in worldwide energy prices and the supply and availability of the feedstocks. Due to the highly competitive nature of most of the products sold by our Chemicals segment, market position cannot necessarily be protected by product differentiation or by passing on cost increases to customers. As a result, price increases in raw materials may not correlate with changes in the prices at which petrochemical and plastics products are sold, thereby negatively affecting margins and the results of operations of our Chemicals segment.

Sustained or prolonged declines in commodity prices and margins for our products may adversely affect our results of operations, liquidity, access to the capital markets, and our ability to fund our capital priorities, including share repurchases and dividends.

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Market conditions, including volatile commodity prices and demand for crude oil, natural gas and NGL, impact the earnings, financial condition and cash flows of our Midstream business.

Our Midstream business is affected by the price of and demand for crude oil, natural gas and NGL, which have historically been volatile. The prices for crude oil, natural gas and NGL depend upon factors beyond our control, including global and local demand, production levels, imports and exports, seasonality and weather conditions, economic and political conditions domestically and internationally, and governmental regulations. Decreases in energy prices can decrease drilling activity, production rates and investments by third parties in the development of new crude oil and natural gas reserves. Sustained periods of low prices can also cause producers to significantly curtail or limit their oil and gas drilling operations, which could substantially delay the production and delivery of volumes of crude oil, natural gas and NGL.

The volume of crude oil and refined petroleum products transported or stored in our pipelines and terminal facilities depends on the demand for and availability of crude oil and refined petroleum products in the areas serviced by our assets. A period of sustained low demand or prices for crude oil could lead to a decline in drilling activity and production, which would lead to a decrease in the volumes of crude oil transported through our pipelines and terminal facilities, negatively affecting our earnings and cash flows. Likewise, our earnings and cash flows would be negatively impacted by a period of sustained lower demand for refined petroleum products, which could lead to lower refinery utilization and result in a decrease in the volumes of refined petroleum product transported through our pipelines and terminal facilities.

The natural gas gathered, processed, transported, sold and stored by us is delivered into pipelines for further delivery to end-users, including fractionation facilities. Demand for these services may be substantially reduced due to lower rates of natural gas production as a result of declining commodity prices. Commodity prices, including when ethane prices are low relative to natural gas prices, can also negatively impact throughput volumes of NGL transported, fractionated and stored. Additionally, revenues and cash flows can increase or decrease as the price of natural gas and NGL fluctuates because of certain contractual arrangements whereby natural gas is purchased for an agreed percentage of proceeds from the sale of the residue gas and/or NGL resulting from its processing activities.

In order to maintain or increase throughput levels on our natural gas gathering and transportation pipeline systems and NGL pipelines and the asset utilization rates at our natural gas processing plants, we must continually obtain new supplies. The level of successful drilling activity and prices of, and demand for, natural gas and crude oil, as well as producers’ desire and ability to obtain necessary permits are some of the factors that may affect new supplies of natural gas and NGL. If we are not able to obtain new supplies of natural gas to replace the natural decline in volumes from existing wells or because of competition, throughput on our pipelines and the utilization rates of our treating and processing facilities would decline. This could have a material adverse effect on our business, results of operations, financial position and cash

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None.

Management has implemented a comprehensive cybersecurity program that is designed to protect our information, and that of our customers and suppliers, against cybersecurity threats that may materially and adversely affect the confidentiality, integrity, and availability of our information systems. Our cybersecurity program includes processes and standards that leverage recognized cybersecurity frameworks, industry best practices and guidance from U.S. Government security directives that focus on cybersecurity and critical infrastructure.

Cybersecurity Governance

Board of Directors

The Audit and Finance Committee of the Board of Directors (the Audit and Finance Committee) is responsible for overseeing the company’s Enterprise Risk Management (ERM) program, including oversight of the processes management has implemented to assess, identify and manage risks associated with cybersecurity and information technology. In carrying out this responsibility, the Audit and Finance Committee regularly receives written reports from the company’s Chief Information Security Officer (CISO) and periodic briefings from the CISO. These presentations may address a wide range of topics, such as the results of recent vulnerability assessments and third-party independent reviews, changes to the threat environment, technological trends and other recent developments, and peer and other third-party benchmarking. The Audit and Finance Committee makes regular reports to the Board of Directors on data protection and cybersecurity matters. The company maintains an Enterprise Cybersecurity Incident Response Plan (ECIRP) which provides the framework for management’s response to cyber-related incidents and escalation protocols, including, when appropriate, prompt reporting to the Board of Directors.

Management

At the management level, our CISO has extensive cybersecurity knowledge and skills gained from work experience at the company and with a law enforcement agency, as well as from obtaining advanced professional certifications. The CISO is responsible for the assessment and management of risks from cybersecurity threats and leads a team responsible for implementing, monitoring and maintaining cybersecurity and data protection practices across the company. The individuals who report directly to our CISO possess relevant educational and industry experience in the areas of cyber threat hunting and intelligence, digital standards, data privacy, cyber training, and cybersecurity operations center management. In addition to our internal cybersecurity capabilities, we also regularly engage consultants, or other third parties to assist with assessing, identifying, and managing cybersecurity risks. The CISO receives reports on cybersecurity threats on an ongoing basis, and in conjunction with management, regularly reviews risk management measures implemented by the company to identify, assess and mitigate data protection and cybersecurity risks. Our CISO works closely with the company’s Senior Counsel, Intellectual Property and Data Protection, to oversee compliance with legal, regulatory and contractual security requirements.

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Risk Management and Strategy

On an annual basis, we conduct an evaluation of our cybersecurity risks as part of the ERM program. Through the ERM program, the CISO and other internal subject matter experts review potential cybersecurity threat scenarios, such as data theft, cash theft, widespread outages and business disruptions, and the potential consequences of such scenarios. The results of the risk assessment are shared with management and the Audit and Finance Committee.

We have a continuous monitoring program to detect and respond to potential cybersecurity threats in real-time. Log data from our technical controls are collected, aggregated, and correlated in a Security Information and Event Management (SIEM) system that identifies and categorizes events, as well as analyzes them. If the SIEM system identifies a potential security event, it can direct other controls to stop the activity and also generate alerts for detection and response. These alerts are monitored by a managed security service provider that augments a dedicated internal Security Operations Center team.

In addition, we utilize a third-party risk management (TPRM) program to identify, assess, monitor, and mitigate risks associated with third-party relationships, including cybersecurity risks. The TPRM program is designed to help ensure proper controls and measures are in place to manage the potential risks and vulnerabilities associated with third parties. Our policies and procedures aid in the governance from initial due diligence, selection, and contracting to termination.

With respect to cybersecurity incident response, our ECIRP provides a standardized framework for responding to cybersecurity incidents. The ECIRP sets out a coordinated approach to investigating, containing, documenting and mitigating incidents, including reporting findings and keeping senior management and other key stakeholders informed and involved as appropriate.

Internal audit performs audits of our cybersecurity program. Each year, we conduct audits across the company’s information technology and operation technology infrastructure, networks, systems, applications, and operational processes and procedures to evaluate compliance with our information security policies and standards. Process control network assurance audits are conducted on a rotating schedule that is risk-based and provides coverage across each operational business area no greater than five years. In addition to the internal audits, we also engage external cybersecurity experts and auditors to conduct assessments, penetration testing, and cybersecurity maturity assessments. Although we have experienced actual and attempted cybersecurity events and incidents on our networks and systems in the past, we do not believe that the risks from any of these events or incidents, individually or in the aggregate, have materially affected our business, operations, or financial condition, or are reasonably likely to have such an effect. For more information concerning cybersecurity risks we face, see the discussion in “Item 1A. Risk Factors” in this report.

From time to time, we may be involved in litigation and claims arising out of our operations in the normal course of business. Additionally, we have elected a $300,000 threshold to disclose certain proceedings arising under federal, state or local environmental laws when a governmental authority is a party to the proceedings. The below matters are disclosed in accordance with that requirement. We do not currently believe that the eventual outcome of any matters previously reported, but still unresolved, individually or in the aggregate, could have a material adverse effect on our business, financial condition, results of operations or cash flows.

Further, our U.S. refineries are implementing two separate consent decrees, regarding alleged violations of the Federal Clean Air Act, with the EPA, five states and one local air pollution agency. Some of the requirements and limitations contained in the decrees provide for stipulated penalties for violations. Stipulated penalties under the decrees are not automatic, but must be requested by one of the agency signatories. As part of periodic reports under the decrees or other reports required by permits or regulations, we occasionally report matters that could be subject to a request for stipulated penalties. If a specific request for stipulated penalties meeting the reporting threshold set forth in SEC rules is made pursuant to these decrees based on a given reported exceedance, we will separately report that matter and the amount of the proposed penalty.

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We received such a request in the first quarter of 2023, and we expect to receive a final demand for, alleged stipulated penalties arising from self-reported Clean Air Act violations at our Alliance, Borger, Sweeny and Wood River refineries. The proposed penalties exceed $500,000 and would be pursued pursuant to the consent decree referenced above and a related Wood River Refinery consent decree. There have been no further developments with respect to this matter.

New Matters

The California Department of Toxic Substances Control (DTSC), served Phillips 66 Company (as successor to Tosco) and approximately 50 other potentially responsible parties with Imminent and Substantial Endangerment Determinations and Orders and Remedial Action Orders in November 2016 related to historic waste sent to certain California landfill sites that were operated by a now bankrupt party. Since that time, we have been coordinating with other potentially responsible parties to negotiate a proposed settlement with DTSC regarding funding future operations, maintenance, and financial assurance for post-closure activities at the sites. As part of the settlement process and Consent Decree in the matter, in December 2023 we agreed to pay approximately $4 million in full satisfaction of our potential liability at the Vine Hill landfill complex located in Martinez, California. The company does not expect any future financial liabilities related to the Vine Hill landfill complex to be material.

On December 1, 2023, the South Coast Air Quality Management District (SCAQMD) issued a demand for penalties that exceeds the $300,000 reporting threshold. The penalty demand proposes to resolve seven Notices of Violation (NOVs) issued between 2020 and 2022 for alleged violations of air permit and air pollution regulatory requirements at the Los Angeles Refinery. We are working with SCAQMD to negotiate and resolve these NOVs.

Matters Previously Reported (unresolved or resolved since the quarterly report on Form 10-Q for the quarterly period ended September 30, 2023)

In 2018, the Colorado Department of Public Health and Environment (CDPHE) issued a Compliance Advisory in relation to an improperly permitted facility flare and related air emissions from flare operations at one of DCP Operating Company LP’s (DCP Operating LP) gas processing plants, which DCP Operating LP self-disclosed to CDPHE in December 2017. Following information exchanges and discussions with CDPHE, a resolution was proposed pursuant to which the plant’s air permit would be revised, and DCP Operating LP would be assessed an administrative penalty and economic benefit payment. A revised air permit was issued in May 2019, but the parties had not yet entered into a final settlement agreement to complete the matter. Subsequently, in July 2020, CDPHE issued a NOV in relation to amine treater emissions at this plant, which DCP Operating LP self-disclosed to CDPHE in April 2020. Two additional and related NOVs were then issued in 2021 and 2023. DCP Operating LP and the CDPHE have reached a tentative agreement to resolve these matters for aggregate monetary civil penalties of approximately $4 million. As part of the settlement, DCP Operating LP will install emissions management equipment that will address the alleged violations. A final order to resolve these matters is expected to be issued during the first quarter of 2024.

See “Dakota Access, LLC (Dakota Access) and Energy Transfer Crude Oil Company, LLC (ETCO)” section of Note 8—Investments, Loans and Long-Term Receivables and Note 16—Contingencies and Commitments, in the Notes to Consolidated Financial Statements, for additional information regarding Legal Proceedings and other regulatory actions.

Not applicable.

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INFORMATION ABOUT OUR EXECUTIVE OFFICERS

** As of February 21, 2024.*

There are no family relationships among any of the executive officers named above or any member of our Board of Directors. The Board of Directors annually elects the officers to serve until a successor is elected and qualified or as otherwise provided in our By-Laws. Set forth below is information about the executive officers identified above.

Mark E. Lashier is President and Chief Executive Officer, a position he has held since July 2022. Previously, Mr. Lashier served as President and Chief Operating Officer of Phillips 66 from April 2021 to July 2022; President and Chief Executive Officer of CPChem from August 2017 to April 2021; and as Executive Vice President, Commercial of CPChem from August 2015 to August 2017.

Kevin J. Mitchell is Executive Vice President and Chief Financial Officer, a position he has held since January 2016. Previously, Mr. Mitchell served as Vice President, Investor Relations from September 2014 to January 2016.

Zhanna Golodryga is Executive Vice President, Emerging Energy and Sustainability, a position she has held since October 2022. Previously, Ms. Golodryga served as Senior Vice President, Chief Digital and Administrative Officer from April 2017 to October 2022.

Richard G. Harbison is Executive Vice President, Refining, a position he has held since June 2022. Mr. Harbison previously served as Vice President, San Francisco Refinery from March 2021 to May 2022; General Manager, San Francisco Refinery from June 2020 to February 2021; Manager, Lake Charles Manufacturing Complex from February 2016 to May 2020 and Manager of the Ferndale Refinery from August 2014 to January 2016.

Brian M. Mandell is Executive Vice President, Marketing and Commercial, a position he has held since March 2019. Mr. Mandell served as Senior Vice President, Marketing and Commercial from August 2018 to March 2019; Senior Vice President, Commercial from November 2016 to August 2018; and President, Global Marketing from March 2015 to November 2016.

Timothy D. Roberts is Executive Vice President, Midstream and Chemicals, a position he has held since August 2018. Previously, Mr. Roberts served as Executive Vice President, Marketing and Commercial from January 2017 to August 2018 and as Executive Vice President, Strategy and Business Development from April 2016 to January 2017.

Vanessa L. Allen Sutherland is Executive Vice President, Government Affairs, General Counsel and Corporate Secretary, a position she has held since January 2022. Ms. Sutherland previously served as Executive Vice President and Chief Legal Officer of Norfolk Southern Corporation from April 2020 to January 2022; Senior Vice President, Government Relations and Chief Legal Officer from August 2019 to April 2020; Senior Vice President, Law and Chief Legal Officer from April 2019 to August 2019; and Vice President, Law from June 2018 to April 2019. Prior to joining Norfolk Southern Corporation, Ms. Sutherland served as Chairperson of the U.S. Chemical Safety and Hazard Investigation Board from August 2015 to June 2018.

J. Scott Pruitt is Vice President and Controller, a position he has held since August 2021. Mr. Pruitt previously served as General Auditor from September 2020 to August 2021 and Assistant Controller from May 2012 to September 2020.

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PART II

Phillips 66’s common stock is traded on the New York Stock Exchange under the symbol “PSX.” At January 31, 2024, the number of stockholders of record of our shares was 28,817.

Performance Graph

The above performance graph represents cumulative total stockholder return, which assumes reinvestment of dividends, of a $100 investment in our common stock, our self-constructed peer group for the year ended December 31, 2023 (the Peer Group) and the S&P 500 Index, for the five years ended December 31, 2023. We evaluate our peer group on an annual basis and believe the Peer Group closely aligns with our size and lines of business.

The Peer Group consists of CVR Energy, Inc.; Delek US Holdings, Inc.; Dow Inc.; HF Sinclair Corporation; LyondellBasell Industries N.V.; Marathon Petroleum Corporation; ONEOK, Inc.; PBF Energy Inc.; Targa Resources Corp.; Valero Energy Corporation; Westlake Chemical Corporation; and The Williams Companies, Inc. Additionally, HollyFrontier Corporation was included as a peer for periods prior to its acquisition by HF Sinclair Corporation in March 2022.

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Issuer Purchases of Equity SecuritiesOn October 25, 2023, our Board of Directors approved a $5 billion increase to our share repurchase authorization. Any future share repurchases will be made at the discretion of management and will depend on various factors including our share price, results of operations, financial condition and cash required for future business plans.

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Management’s Discussion and Analysis is the company’s analysis of its financial performance, financial condition, and significant trends that may affect future performance. It should be read in conjunction with the consolidated financial statements and notes thereto included elsewhere in this Annual Report on Form 10-K.

The term “earnings” as used in Management’s Discussion and Analysis refers to net income attributable to Phillips 66. The terms “results,” “before-tax income” or “before-tax loss” as used in Management’s Discussion and Analysis refer to income (loss) before income taxes.

EXECUTIVE OVERVIEW AND BUSINESS ENVIRONMENT

Phillips 66 is uniquely positioned as a diversified and integrated downstream energy company operating with Midstream, Chemicals, Refining, and Marketing and Specialties (M&S) segments. At December 31, 2023, we had total assets of $75.5 billion.

Executive Overview

During 2023, we reported earnings of $7 billion, generated $7 billion in cash from operating activities and received proceeds from debt offerings, net of debt repayments, of $2 billion. We used available cash primarily to repurchase noncontrolling interests in DCP Midstream, LP (DCP LP) for $4.1 billion, fund capital expenditures and investments of $2.4 billion, repurchase shares of common stock for $4 billion and pay dividends on our common stock of $1.9 billion. We ended 2023 with $3.3 billion of cash and cash equivalents and approximately $6.4 billion of total committed capacity available under our credit facilities.

Strategic Priorities Update

In November 2022, we announced financial and operational targets toward achieving the company’s strategic priorities and in October 2023, we announced updates to certain targets. Our strategic priorities that are intended to enhance long-term shareholder value include:

• Deliver Shareholder Returns –** We believe shareholder value is enhanced through, among other things, a secure, competitive and growing dividend, complemented by share repurchases. We increased our target for returns to shareholders through share repurchases and dividends from July 2022 through year-end 2024 to a range of $13 billion to $15 billion from a range of $10 billion to $12 billion. In support of the increased target, our Board of Directors approved a $5 billion increase to our share repurchase authorization on October 25, 2023. We plan to return at least 50% of net cash provided by operating activities to shareholders through share repurchases and dividends. In 2023, we paid $4 billion to repurchase shares of our common stock and paid dividends on our common stock of $1.9 billion. The amount and timing of future dividend payments and the level and timing of future share repurchases is subject to the discretion of, and approval by, our Board of Directors and will depend on various factors including our share price, results of operations, financial condition and cash required for future business plans.

We also plan to monetize certain assets that are no longer considered to be a long-term strategic fit. We expect to generate proceeds of over $3 billion from the disposition of these non-core assets, which we plan to use to further advance our strategic priorities, including returns to shareholders through share repurchases and dividends. The timing of these asset dispositions will be subject to satisfactory market conditions and any necessary regulatory approvals.

• Improve Refining Performance – We are focused on optimizing utilization rates and product yield at our refineries through reliable and safe operations, which will enable us to capture the value available in the market in terms of prices and margins. We plan to enhance Refining segment returns and increase our utilization rates by focusing on low-capital, higher-return projects that increase asset reliability, improve market capture and reduce costs. During 2023, our worldwide refining crude oil capacity utilization rate was 92% and our worldwide refining clean product yield was 85%, compared to 90% and 84%, respectively, in 2022.

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• Capture Value from Wellhead-to-Market –** We are focused on growing our fully integrated natural gas liquids (NGL) wellhead-to-market value chain within our Midstream segment. As part of executing this strategy, we completed two transactions that increased our economic interest in DCP LP; the first in 2022, which increased our indirect economic interest to 43.3%, and the second in 2023, which increased our aggregate direct and indirect economic interest in DCP LP to 86.8%. We have already captured operating and commercial synergies from these transactions and remain focused on capturing additional synergies as we complete our integration activities in 2024. In 2024, we have budgeted $985 million of capital expenditures and investments in our Midstream segment, of which $593 million will be focused on enhancing our integrated NGL wellhead-to-market value chain. In addition, growth capital includes $250 million related to the repayment of our 25% share of Dakota Access, LLC’s (Dakota Access) debt due in 2024.

• Execute Business Transformation –** We continue to progress our multi-year business transformation aimed at sustainably reducing our cost structure. We exceeded our savings target by achieving a run-rate cost reduction of $900 million per year and sustaining capital reduction of $300 million per year by the end of 2023. As such, we are now targeting a run-rate cost reduction of $1.1 billion per year by the end of 2024, while maintaining our sustaining capital reduction of $300 million per year in 2024.

• Maintain Financial Strength and Flexibility –** During 2023, we successfully reduced our sustaining capital spend and used available cash and proceeds from debt offerings to increase our economic interest in DCP LP, repurchase shares of our common stock, pay dividends on our common stock, fund capital expenditures and investments and repay a portion of DCP LP’s debt.

• Drive Disciplined Growth and Returns –** A disciplined capital allocation process ensures we invest in projects that are expected to generate competitive returns. Our strategy remains focused on investing growth capital in the Midstream and Chemicals segments. We are also investing in capital-efficient renewable fuels projects to advance a lower-carbon future. In 2024, we have budgeted $2.2 billion in capital expenditures and investments, which includes $1.3 billion of growth capital.

DCP Midstream, LLC and Gray Oak Holdings LLC Merger (DCP Midstream Merger)

On August 17, 2022, we announced a realignment of our economic and governance interests in DCP LP and Gray Oak Pipeline, LLC (Gray Oak Pipeline) resulting from the merger of DCP Midstream, LLC (DCP Midstream) and Gray Oak Holdings LLC (Gray Oak Holdings). In connection with the DCP Midstream Merger, we were delegated DCP Midstream’s governance rights over DCP LP and its general partner entities, referred to as DCP Midstream Class A Segment, and our indirect economic interest in DCP LP increased to 43.3%.

Starting on August 18, 2022, our financial results reflect the consolidation of DCP Midstream Class A Segment, as well as DCP Sand Hills Pipeline, LLC (DCP Sand Hills) and DCP Southern Hills Pipeline, LLC (DCP Southern Hills). Since the DCP Midstream Merger, we have taken steps to integrate the operations and personnel of DCP Midstream Class A Segment to enable the capture of commercial and operational synergies.

DCP Midstream, LP Merger (DCP LP Merger)

On June 15, 2023, we completed the acquisition of all publicly held common units of DCP LP pursuant to the terms of the Agreement and Plan of Merger, dated as of January 5, 2023 (DCP LP Merger Agreement). The DCP LP Merger Agreement was entered into with DCP LP, its subsidiaries and its general partner entities, pursuant to which o

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Financial Instrument Market Risk

We and certain of our subsidiaries are exposed to market risks produced by changes in the prices of crude oil, refined petroleum product, NGL, natural gas, renewable feedstock and electric power, as well as fluctuations in interest rates and foreign currency exchange rates. We and certain of our subsidiaries may hold and use derivative contracts to manage these risks.

Commodity Price Risk

Generally, our policy is to remain exposed to the market prices of commodities. Consistent with this policy, we use derivative contracts to convert our exposure from fixed-price sales or purchase contracts, often specified in contracts with refined petroleum product customers, back to floating market prices. We also use futures, forwards, swaps and options in various markets to accomplish the following objectives:

• Balance physical systems or meet our refinery requirements and market demand. In addition to cash settlement prior to contract expiration, certain exchange-traded futures may be settled by physical delivery of the underlying commodity.

• Enable us to use the market knowledge gained from our physical commodity market activities to capture market opportunities, such as moving physical commodities to more profitable locations, storing commodities to capture seasonal or time premiums, and blending commodities to capture quality upgrades. Derivatives may be utilized to optimize these activities.

• Manage the risk to our cash flows from price exposures on specific crude oil, refined petroleum product, NGL, renewable feedstock and natural gas transactions.

These objectives optimize the value of our supply chain and may reduce our exposure to fluctuations in market prices.

Our use of derivative instruments is governed by an “Authority Limitations” document approved by our Board of Directors. This document prohibits the use of highly leveraged derivatives or derivative instruments without sufficient market liquidity for comparable valuations, and establishes Value at Risk (VaR) limits. Compliance with these limits is monitored daily by our global risk group.

We use a VaR model to estimate the loss in fair value that could potentially result on a single day from the effect of adverse changes in market conditions on the derivative commodity instruments held or issued. Using Monte Carlo simulation, a 95% confidence level and a one-day holding period, the VaR for derivative commodity instruments issued or held at December 31, 2023 and 2022, was immaterial to our cash flows and results of operations.

Interest Rate Risk

Our use of fixed- or variable-rate debt directly exposes us to interest rate risk. Fixed-rate debt, such as our senior notes, exposes us to changes in the fair value of our debt due to changes in market interest rates. Fixed-rate debt also exposes us to the risk that we may need to refinance maturing debt with new debt at higher rates, or that we may be obligated to pay rates higher than the current market. Variable-rate debt, such as our floating-rate notes or borrowings under our revolving credit facility, exposes us to short-term changes in market rates that impact our interest expense. The following tables provide information about our debt instruments that are sensitive to changes in U.S. interest rates. These tables present principal cash flows and related weighted-average interest rates by expected maturity dates. Weighted-average variable rates are based on effective rates at each reporting date. The carrying amount of our floating-rate debt approximates its fair value. The fair value of the fixed-rate financial instruments is estimated based on observable market prices.

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Foreign Currency Risk

We are exposed to foreign currency exchange rate fluctuations related to our international operations. Generally, we do not hedge our foreign currency risk.

Risk Monitoring

Our Chief Executive Officer and Chief Financial Officer monitor risks to our business resulting from commodity prices, interest rates and foreign currency exchange rates.

For additional information about our use of derivative instruments, see Note 17—Derivatives and Financial Instruments, in the Notes to Consolidated Financial Statements.

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CAUTIONARY STATEMENT FOR THE PURPOSES OF THE “SAFE HARBOR” PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

This report includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. You can normally identify our forward-looking statements by the words “anticipate,” “estimate,” “believe,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “expect,” “objective,” “projection,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target” and similar expressions that convey the prospective nature of events or outcomes, but the absence of such words does not mean a statement is not forward-looking.

We based these forward-looking statements on our current expectations, estimates and projections about us, our operations, our joint ventures and entities in which we have equity interests, as well as the industries in which we and they operate. We caution you not to place undue reliance on these forward-looking statements, which speak only as of the date of this report, as they are not guarantees of future performance and involve assumptions that, while made in good faith, may prove to be incorrect, and involve risks and uncertainties we cannot predict. In addition, we based many of these forward-looking statements on assumptions about future events that may prove to be inaccurate. Accordingly, our actual outcomes and results may differ materially from what we have expressed or forecasted in any forward-looking statement. Factors that could cause actual results to differ materially from those in our forward-looking statements include:

• Fluctuations in market conditions, including NGL, crude oil, refined petroleum product and natural gas prices and refining, marketing and petrochemical margins and demand.

• Changes in governmental policies relating to NGL, crude oil, natural gas or refined petroleum products pricing, regulation or taxation, including exports.

• Capacity constraints in, or other limitations on, the pipelines, storage and fractionation facilities to which we deliver natural gas or NGL and the availability of alternative markets and arrangements for our natural gas and NGL.

• Actions taken by OPEC and non-OPEC oil producing countries impacting supply and demand and correspondingly, commodity prices.

• Our ability to achieve the expected benefits of the DCP LP integration, including the realization of expected synergies.

• Unexpected changes in costs or technical requirements for constructing, modifying or operating our facilities or transporting our products.

• Unexpected technological or commercial difficulties in manufacturing, refining or transporting our products, including chemical products.

• Lack of, or disruptions in, adequate and reliable transportation for our NGL, crude oil, natural gas and refined petroleum products.

• The level and success of drilling and quality of production volumes around our midstream assets.

• Our ability to timely obtain or maintain permits, including those necessary for capital projects.

• Our ability to comply with government regulations or make capital expenditures required to maintain compliance.

• Our ability to realize sustained savings and cost reductions from the company’s business transformation initiatives.

• Changes to worldwide government policies relating to renewable fuels, climate change and greenhouse gas emissions that adversely affect programs like the renewable fuel standards program, low carbon fuel standards and tax credits for biofuels.

• Domestic and international economic and political developments including armed hostilities, such as the Russia-Ukraine war, instability in the financial services and banking sector, excess inflation, rising interest rates, expropriation of assets, and changes in fiscal policy.

Index to Financial Statements

• The impact on commercial activity and demand for refined petroleum products from any widespread public health crisis, as well as the extent and duration of recovery of economies and demand for our products following any such crisis.

• Failure to complete definitive agreements and feasibility studies for, and to complete construction of, announced and future capital projects on time and within budget.

• Our ability to successfully complete, or any material delay in the completion of, asset dispositions or acquisitions that we pursue.

• Potential disruption or interruption of our operations or those of our joint ventures due to litigation or other governmental or regulatory action.

• Damage to our facilities due to accidents, weather and climate events, civil unrest, insurrections, political events, terrorism or cyberattacks.

• Our ability to meet our sustainability goals, including reducing our GHG emissions intensity, developing and protecting new technologies, and commercializing lower-carbon opportunities.

• Failure of new products and services to achieve market acceptance.

• International monetary conditions and exchange controls.

• Substantial investments required, or reduced demand for products, as a result of existing or future environmental rules and regulations, including GHG emissions reductions and reduced consumer demand for refined petroleum products.

• Liability resulting from litigation or for remedial actions, including removal and reclamation obligations under environmental regulations.

• Changes in tax, environmental and other laws and regulations (including alternative energy mandates) applicable to our business.

• Political and societal concerns about climate change that could result in changes to our business or operations or increase expenditures, including litigation-related expenses.

• Changes in estimates or projections used to assess fair value of intangible assets, goodwill, and properties, plants and equipment and/or strategic decisions or other developments with respect to our asset portfolio that cause impairment charges.

• Limited access to capital or significantly higher cost of capital related to changes to our credit profile or illiquidity or uncertainty in the domestic or international financial markets.

• The creditworthiness of our customers and the counterparties to our transactions, including the impact of bankruptcies.

• Cybersecurity incidents or other disruptions that compromise our information and expose us to liability.

• The operation, financing and distribution decisions of our joint ventures that we do not control.

• The factors generally described in “Item 1A. Risk Factors” in this report.

Index to Financial Statements

PHILLIPS 66

INDEX TO FINANCIAL STATEMENTS

Index to Financial Statements

Report of Management

Management prepared, and is responsible for, the consolidated financial statements and the other information appearing in this Annual Report. The consolidated financial statements present fairly the company’s financial position, results of operations and cash flows in conformity with generally accepted accounting principles in the United States. In preparing its consolidated financial statements, the company includes amounts that are based on estimates and judgments management believes are reasonable under the circumstances. The company’s financial statements have been audited by Ernst & Young LLP, an independent registered public accounting firm appointed by the Audit and Finance Committee of the Board of Directors. Management has made available to Ernst & Young LLP all of the company’s financial records and related data, as well as the minutes of stockholders’ and directors’ meetings.

Assessment of Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting. Phillips 66’s internal control system was designed to provide reasonable assurance to the company’s management and directors regarding the preparation and fair presentation of published financial statements.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

Management assessed the effectiveness of the company’s internal control over financial reporting as of December 31, 2023. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control—Integrated Framework (2013). Based on this assessment, management concluded the company’s internal control over financial reporting was effective as of December 31, 2023.

Ernst & Young LLP has issued an audit report on the company’s internal control over financial reporting as of December 31, 2023, and their report is included herein.

Date: February 21, 2024

Index to Financial Statements

Report 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, 2

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None.

We maintain disclosure controls and procedures designed to ensure that information required to be disclosed in reports we file or submit under the Securities Exchange Act of 1934, as amended (the Act), is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to management, including our principal executive and principal financial officers, as appropriate, to allow timely decisions regarding required disclosure. As of December 31, 2023, with the participation of management, our President and Chief Executive Officer and our Executive Vice President and Chief Financial Officer carried out an evaluation, pursuant to Rule 13a-15(b) of the Act, of the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) of the Act). Based upon that evaluation, our President and Chief Executive Officer and our Executive Vice President and Chief Financial Officer concluded that our disclosure controls and procedures were operating effectively as of December 31, 2023.

There have been no changes in our internal control over financial reporting, as defined in Rule 13a-15(f) of the Act, in the quarterly period ended December 31, 2023, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Annual Report on Internal Control Over Financial Reporting

This report is included in Item 8 and is incorporated herein by reference.

Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting

This report is included in Item 8 and is incorporated herein by reference.

During the quarter ended December 31, 2023, no director or Section 16 officer adopted, modified or terminated any “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (in each case, as defined in Item 408(a) of Regulation S-K).

Not applicable.

Index to Financial Statements

PART III

Information regarding our executive officers appears in Part I of this report.

We have adopted a Code of Ethics for the Principal Executive Officer and Senior Financial Officers (the “Code of Ethics”) that applies to our Principal Executive Officer, Chief Financial Officer and Controller. The Code of Ethics is posted on our website located at http://www.phillips66.com (within the Corporate Governance section) and is available in print upon request. We intend to disclose future amendments to the Code of Ethics, and any waivers of the Code of Ethics, on our website.

The remaining information required by Item 10 of Part III is incorporated herein by reference from our Definitive Proxy Statement relating to our 2024 Annual Meeting of Stockholders to be held on May 15, 2024, which will be filed within 120 days after December 31, 2023 (2024 Definitive Proxy Statement).*

The information required by Item 11 of Part III is incorporated herein by reference from our 2024 Definitive Proxy Statement.*

The information required by Item 12 of Part III is incorporated herein by reference from our 2024 Definitive Proxy Statement.*

The information required by Item 13 of Part III is incorporated herein by reference from our 2024 Definitive Proxy Statement.*

The information required by Item 14 of Part III is incorporated herein by reference from our 2024 Definitive Proxy Statement.*

** Except for information or data specifically incorporated herein by reference under Items 10 through 14, other information and data appearing in our 2024 Definitive Proxy Statement are not deemed to be a part of this Annual Report on Form 10-K or deemed to be filed with the Commission as a part of this report.*

Index to Financial Statements

PART IV

None.

Index to Financial Statements

PHILLIPS 66

INDEX TO EXHIBITS

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