ET Energy Transfer LP

Diamondback Energy, Inc. (NASDAQ: FANG) (“Diamondback”) today announced the sale of WTG Midstream Holdings LLC to Energy Transfer LP (NYSE: ET) (“ET”) resulting in total pre-tax consideration net to Diamondback of approximately $375 million, subject to customary closing conditions and adjustments. Consideration for the transaction will consist of a mix of cash and ET common units. The transaction is expected to close in the third quarter of 2024.

Diamondback, through its wholly-owned subsidiary Rattler Midstream LP (“Rattler”), has owned a 25% stake in Remuda Midstream Holdings LLC (“WTG Midstream” or “WTG”) since October of 2021. This sale represents ~3.5x multiple on invested capital for Diamondback. Proceeds from the transaction will be used to reduce debt associated with the pending Endeavor Energy Resources, L.P. merger.

“We would like to congratulate Stonepeak and the WTG team on this fantastic outcome,” stated Travis Stice, Chairman and Chief Executive Officer of Diamondback. “Not only has our partnership generated an outsized economic return, but WTG’s gas gathering and processing system continues to support Diamondback’s substantial activity on our dedicated acreage. We are excited to further expand our relationship with Energy Transfer and expect a smooth operational transition.”

About Diamondback

Diamondback is an independent oil and natural gas company headquartered in Midland, Texas focused on the acquisition, development, exploration and exploitation of unconventional, onshore oil and natural gas reserves in the Permian Basin in West Texas. For more information, please visit www.diamondbackenergy.com.

Diamondback Investor Contact:

Adam Lawlis+1 432.221.7467alawlis@diamondbackenergy.com

Forward-Looking Statements

This news release contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which involve risks, uncertainties, and assumptions. All statements, other than statements of historical fact, including statements regarding Diamondback’s: future performance; business strategy; future operations (including drilling plans and capital plans); estimates and projections of revenues, losses, costs, expenses, returns, cash flow, and financial position; reserve estimates and its ability to replace or increase reserves; anticipated benefits of strategic transactions (including acquisitions and divestitures); and plans and objectives of management (including plans for future cash flow from operations and for executing environmental strategies) are forward-looking statements. When used in this news release, the words “aim,” “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “future,” “guidance,” “intend,” “may,” “model,” “outlook,” “plan,” “positioned,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would,” and similar expressions (including the negative of such terms) as they relate to Diamondback are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. Although Diamondback believes that the expectations and assumptions reflected in its forward-looking statements are reasonable as and when made, they involve risks and uncertainties that are difficult to predict and, in many cases, beyond Diamondback’s control. Accordingly, forward-looking statements are not guarantees of future performance and Diamondback’s actual outcomes could differ materially from what Diamondback has expressed in its forward-looking statements. Information concerning these risks and uncertainties and other factors can be found in Diamondback’s filings with the Securities and Exchange Commission ("SEC"), including its reports on Forms 10-K, 10-Q and 8-K, which can be obtained free of charge on the SEC’s web site at http://www.sec.gov. Diamondback undertakes no obligation to update or revise any forward-looking statement unless required by applicable law.