Southwestern Energy Schedules Second Quarter Earnings Release Date for August 1, 2024

Southwestern Energy Company (NYSE:SWN) today announced the Company will release second quarter financial results on August 1, 2024 after market close, which will be available on Southwestern's website at www.swn.com.

Due to the pending merger with Chesapeake Energy Corporation, Southwestern will not host a conference call or webcast to discuss second quarter 2024 results.

About Southwestern Energy

Southwestern Energy Company (NYSE:SWN) is a leading U.S. producer and marketer of natural gas and natural gas liquids focused on responsibly developing large-scale energy assets in the nation's most prolific shale gas basins. SWN's returns-driven strategy strives to create sustainable value for its stakeholders by leveraging its scale, financial strength and operational execution. For additional information, please visit www.swn.com and www.swncrreport.com.

Cautionary Statement About Forward-Looking Statements

The information included herein and in any oral statements made in connection herewith may be deemed to be forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact or present financial information, included herein that address activities, outcomes and other matters that Southwestern Energy Company ("Southwestern") or Chesapeake Energy Corporation ("Chesapeake") expects, believes or anticipates will or may occur in the future, including without limitation, statements regarding the proposed transaction between Southwestern and Chesapeake (the "proposed transaction"), the expected closing of the proposed transaction and the timing thereof and as adjusted descriptions of the post-transaction company and its operations, strategies and plans, integration, debt levels and leverage ratio, capital expenditures, cash flows and anticipated uses thereof, synergies, opportunities and anticipated future performance, including an expected accretion to earnings and free cash flow and dividend payments, are forward-looking statements. Although we and Chesapeake believe the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance. We and Chesapeake have no obligation and make no undertaking to publicly update or revise any forward-looking statements, except as may be required by law.

Forward-looking statements include the items identified in the preceding paragraph, information concerning possible or assumed future results of operations and other statements in this communication identified by words such as "anticipate," "intend," "plan," "project," "predict," "estimate," "continue," "potential," "should," "could," "may," "will," "shall," "become," "objective," "guidance," "outlook," "effort," "expect," "believe," "predict," "budget," "projection," "goal," "forecast," "model," "target," or similar words. Statements may be forward-looking even in the absence of these particular words.

You should not place undue reliance on forward-looking statements. They are subject to known and unknown risks, uncertainties and other factors that may affect our operations, markets, products, services and prices and cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. These forward-looking statements are based on current beliefs of the management of Southwestern and Chesapeake, based on currently available information, as to the outcome and timing of future events. In addition to any assumptions and other factors referred to specifically in connection with forward-looking statements, risks, uncertainties and factors that could cause actual results to differ materially from those indicated in any forward-looking statement include, but are not limited to: the risk that Southwestern's and Chesapeake's businesses will not be integrated successfully; the risk that cost savings, synergies and growth from the proposed transaction may not be fully realized or may take longer to realize than expected; the risk that the credit ratings of the combined company or its subsidiaries may be different from what the companies expect; the possibility that stockholders of Chesapeake may not approve the issuance of new shares of Chesapeake common stock in the proposed transaction or that stockholders of Chesapeake or stockholders of Southwestern may not approve the proposed transaction; the risk that a condition to closing of the proposed transaction may not be satisfied, that either party may terminate the merger agreement or that the closing of the proposed transaction might be delayed or not occur at all; potential adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; the risk the parties do not receive regulatory approval of the proposed transaction; the occurrence of any other event, change or other circumstances that could give rise to the termination of the merger agreement; the risk that changes in Chesapeake's capital structure and governance could have adverse effects on the market value of its securities; the ability of Southwestern and Chesapeake to retain customers and retain and hire key personnel and maintain relationships with their suppliers and customers and on Southwestern's and Chesapeake's operating results and business generally; the risk the proposed transaction could distract management from ongoing business operations or cause Southwestern and/or Chesapeake to incur substantial costs; the risk of any litigation relating to the proposed transaction; the risk that Chesapeake may be unable to reduce expenses or access financing or liquidity; the impact of COVID-19 or other diseases; the impact of adverse changes in interest rates and inflation; and the risk of changes in governmental regulations or enforcement practices, especially with respect to environmental, health and safety matters. All such factors are difficult to predict and are beyond our and Chesapeake's control, including those detailed in our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K that are available on our website at www.swn.com under the "Investors" tab and on the website of the Securities and Exchange Commission (the "SEC") at www.sec.gov, and those detailed in Chesapeake's Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K that are available on Chesapeake's website at https://investors.chk.com/ and on the SEC's website.

Should one or more of the risks or uncertainties described above or elsewhere in this communication occur, or should underlying assumptions prove incorrect, actual results and plans could differ materially from those expressed in any forward-looking statements. We specifically disclaim all responsibility to update publicly any information contained in a forward-looking statement or any forward-looking statement in its entirety and therefore disclaim any resulting liability for potentially related damages.

All forward-looking statements attributable to us are expressly qualified in their entirety by this cautionary statement.

Important Additional Information Regarding the Transaction Has Been Filed with the SEC and Where to Find It

In connection with the proposed transaction between Southwestern and Chesapeake, Chesapeake filed a Registration Statement on Form S-4 (the "Registration Statement") with the SEC that also constitutes a prospectus of Chesapeake common stock. The Registration Statement was declared effective on May 17, 2024, at which time Chesapeake filed a final prospectus and Southwestern filed a definitive proxy statement. Chesapeake and Southwestern commenced mailing of the definitive joint proxy statement/prospectus (the "joint proxy statement/prospectus") to their respective shareholders on or about May 17, 2024. Each party may also file other relevant documents regarding the proposed transaction with the SEC. This communication is not a substitute for the joint proxy statement/prospectus or for any other document that Southwestern or Chesapeake has filed or may file in the future with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, THE JOINT PROXY STATEMENT/PROSPECTUS, AS EACH MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME, AND OTHER RELEVANT DOCUMENTS FILED BY SOUTHWESTERN AND CHESAPEAKE WITH THE SEC BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT SOUTHWESTERN AND CHESAPEAKE, THE PROPOSED TRANSACTION, THE RISKS RELATED THERETO AND RELATED MATTERS.

Investors will be able to obtain free copies of the joint proxy statement/prospectus, as each may be amended from time to time, and other relevant documents filed by Southwestern and Chesapeake with the SEC through the website maintained by the SEC at http://www.sec.gov. Copies of documents filed with the SEC by Southwestern, including the joint proxy statement/prospectus, will be available free of charge from Southwestern's website at www.swn.com under the "Investors" tab. Copies of documents filed with the SEC by Chesapeake, including the joint proxy statement/prospectus, will be available free of charge from Chesapeake's website at https://investors.chk.com/.

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.

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