WPX WPX Energy Inc

Filed by Devon Energy Corporation

Pursuant to Rule 425 under the Security Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: WPX Energy, Inc.

Commission File No.: 1-35322

Subject: Reminder to Employees to Vote Shares Prior to Special Meeting on December 30

If you were a Devon stockholder as of November 4, you should have received one or more emails at the beginning of December asking you to vote all of your shares for Devon’s Special Meeting of Stockholders on December 30, 2020.

Please be sure to vote shares in all of your accounts prior to the Special Meeting. As explained above, this may require you to vote multiple times if you hold shares in multiple places. Each and every share voted is important to Devon.

If you have any questions regarding voting your shares, please contact Alison Keim by email (Alison.Keim@dvn.com) or by phone (405.228.4417).

ADDITIONAL INFORMATION AND WHERE TO FIND IT

In connection with the proposed merger (the “Proposed Transaction”) of Devon Energy Corporation (“Devon”) and WPX Energy, Inc. (“WPX”), Devon has filed with the Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 to register the shares of Devon’s common stock to be issued in connection with the Proposed Transaction. The registration statement includes a document that serves as a prospectus of Devon and a joint proxy statement of each of Devon and WPX (the “joint proxy statement/prospectus”), and each party will file other documents regarding the Proposed Transaction with the SEC. The registration statement on Form S-4, as amended, was declared effective by the SEC on November 24, 2020, and Devon and WPX mailed the joint proxy statement/prospectus to their respective stockholders on or about November 30, 2020. INVESTORS AND SECURITY HOLDERS OF DEVON AND WPX ARE ADVISED TO READ THE REGISTRATION STATEMENT, THE JOINT PROXY STATEMENT/PROSPECTUS, INCLUDING ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, AND ANY OTHER RELEVANT DOCUMENTS THAT WILL BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY BECAUSE THEY DO AND WILL CONTAIN IMPORTANT INFORMATION ABOUT DEVON, WPX, THE PROPOSED TRANSACTION AND RELATED MATTERS. Investors and security holders may obtain copies of the registration statement and the joint proxy statement/prospectus and other documents containing important information about Devon and WPX free of charge from the SEC’s website. The documents filed by Devon with the SEC may be obtained free of charge at Devon’s website at www.devonenergy.com or at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from Devon by requesting them by mail at Devon, Attn: Investor Relations, 333 West Sheridan Ave, Oklahoma City, OK 73102. The documents filed by WPX with the SEC may be obtained free of charge at WPX’s website at www.wpxenergy.com or at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from WPX by requesting them by mail at WPX, Attn: Investor Relations, P.O. Box 21810, Tulsa, OK 74102.

PARTICIPANTS IN THE SOLICITATION

Devon, WPX and certain of their respective directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from Devon’s and WPX’s stockholders with respect to the Proposed Transaction. Information about Devon’s directors and executive officers is available in Devon’s Annual Report on Form 10-K for the 2019 fiscal year filed with the SEC on February 19, 2020, and its definitive proxy statement for the 2020 annual meeting of

shareholders filed with the SEC on April 22, 2020. Information about WPX’s directors and executive officers is available in WPX’s Annual Report on Form 10-K for the 2019 fiscal year filed with the SEC on February 28, 2020 and its definitive proxy statement for the 2020 annual meeting of shareholders filed with the SEC on March 31, 2020. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, is contained in the joint proxy statement/prospectus. Stockholders, potential investors and other readers should read the joint proxy statement/prospectus carefully before making any voting or investment decisions.

NO OFFER OR SOLICITATION

This communication is not intended to and shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

FORWARD LOOKING STATEMENTS

This communication includes “forward-looking statements” as defined by the SEC. Such statements include those concerning strategic plans, Devon’s and WPX’s expectations and objectives for future operations, as well as other future events or conditions, and are often identified by use of the words and phrases such as “expects,” “believes,” “will,” “would,” “could,” “continue,” “may,” “aims,” “likely to be,” “intends,” “forecasts,” “projections,” “estimates,” “plans,” “expectations,” “targets,” “opportunities,” “potential,” “anticipates,” “outlook” and other similar terminology. All statements, other than statements of historical facts, included in this communication that address activities, events or developments that Devon or WPX expects, believes or anticipates will or may occur in the future are forward-looking statements. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond Devon’s and WPX’s control. Consequently, actual future results could differ materially from Devon’s and WPX’s expectations due to a number of factors, including, but not limited to: the risk that Devon’s and WPX’s businesses will not be integrated successfully; the risk that the cost savings, synergies and growth from the Proposed Transaction may not be fully realized or may take longer to realize than expected; the diversion of management time on transaction-related issues; the effect of future regulatory or legislative actions on the companies or the industries in which they operate, including the risk of new restrictions with respect to hydraulic fracturing or other development activities on Devon’s or WPX’s federal acreage or their other assets; the risk that the credit ratings of the combined company or its subsidiaries may be different from what the companies expect; the risk that Devon or WPX may be unable to obtain governmental and regulatory approvals required for the Proposed Transaction, or that required governmental and regulatory approvals may delay the Proposed Transaction or result in the imposition of conditions that could reduce the anticipated benefits from the Proposed Transaction or cause the parties to abandon the Proposed Transaction; the risk that a condition to closing of the Proposed Transaction may not be satisfied; the length of time necessary to consummate the Proposed Transaction, which may be longer than anticipated for various reasons; potential liability resulting from pending or future litigation; changes in the general economic environment, or social or political conditions, that could affect the businesses; the potential impact of the announcement or consummation of the Proposed Transaction on relationships with customers, suppliers, competitors, management and other employees; the ability to hire and retain key personnel; reliance on and integration of information technology systems; the risks associated with assumptions the parties make in connection with the parties’ critical accounting estimates and legal proceedings; the volatility of oil, gas and natural gas liquids (NGL) prices; uncertainties inherent in estimating oil, gas and NGL reserves; the impact of reduced demand for our products and products made from them due to governmental and societal actions taken in response to the COVID-19 pandemic; the uncertainties, costs and risks involved in Devon’s and WPX’s operations, including as a result of employee misconduct; natural disasters, pandemics, epidemics (including COVID-19 and any escalation or worsening thereof) or other public health conditions; counterparty credit risks; risks relating to Devon’s and WPX’s indebtedness; risks related to Devon’s and WPX’s hedging activities; competition for assets, materials, people and capital; regulatory restrictions, compliance costs and other risks relating to governmental regulation, including with respect to environmental matters; cyberattack risks; Devon’s and WPX’s limited control over third parties who operate some of their respective oil and gas properties; midstream capacity constraints and potential interruptions in production; the extent to which insurance covers any losses Devon or WPX may experience; risks related to investors attempting to effect change; general domestic and international economic and political conditions, including the impact of COVID-19; and changes in tax, environmental and other laws, including court rulings, applicable to Devon’s and WPX’s business.

In addition to the foregoing, the COVID-19 pandemic and its related repercussions have created significant volatility, uncertainty and turmoil in the global economy and Devon’s and WPX’s industry. This turmoil has included an unprecedented supply-and-demand imbalance for oil and other commodities, resulting in a swift and material decline in commodity prices in early 2020. Devon’s and WPX’s future actual results could differ materially from the forward-looking statements in this communication due to the COVID-19 pandemic and related impacts, including, by, among other things: contributing to a sustained or further deterioration in commodity prices; causing takeaway capacity constraints for production, resulting in further production shut-ins and additional downward pressure on impacted regional pricing differentials; limiting Devon’s and WPX’s ability to access

sources of capital due to disruptions in financial markets; increasing the risk of a downgrade from credit rating agencies; exacerbating counterparty credit risks and the risk of supply chain interruptions; and increasing the risk of operational disruptions due to social distancing measures and other changes to business practices. Additional information concerning other risk factors is also contained in Devon’s and WPX’s most recently filed Annual Reports on Form 10-K, subsequent Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other SEC filings.

Many of these risks, uncertainties and assumptions are beyond Devon’s or WPX’s ability to control or predict. Because of these risks, uncertainties and assumptions, you should not place undue reliance on these forward-looking statements. Nothing in this communication is intended, or is to be construed, as a profit forecast or to be interpreted to mean that earnings per share of Devon or WPX for the current or any future financial years or those of the combined company will necessarily match or exceed the historical published earnings per share of Devon or WPX, as applicable. Neither Devon nor WPX gives any assurance (1) that either Devon or WPX will achieve their expectations, or (2) concerning any result or the timing thereof, in each case, with respect to the Proposed Transaction or any regulatory action, administrative proceedings, government investigations, litigation, warning letters, consent decree, cost reductions, business strategies, earnings or revenue trends or future financial results.

All subsequent written and oral forward-looking statements concerning Devon, WPX, the Proposed Transaction, the combined company or other matters and attributable to Devon or WPX or any person acting on their behalf are expressly qualified in their entirety by the cautionary statements above. Devon and WPX assume no duty to update or revise their respective forward-looking statements based on new information, future events or otherwise.