DISCK Discovery Inc

On March 9, 2022, Discovery, Inc. (“Discovery”) issued a press release announcing the pricing of a senior unsecured notes offering by Magallanes, Inc., (“Spinco”) a wholly owned subsidiary of AT&T Inc. (“AT&T”), that is expected to merge with a wholly-owned subsidiary of Discovery in connection with the previously announced combination of Discovery and the business, operations and activities that constitute a portion of the WarnerMedia segment of AT&T in a Reverse Morris Trust-type transaction. The senior unsecured notes offered by Spinco have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

The information in this Item 7.01 and Exhibit 99.1 is being furnished under Item 7.01 and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of such section, nor shall such exhibit be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act.

Cautionary Statement Concerning Forward-Looking Statements

Information set forth in this communication, including financial estimates and statements as to the expected timing, completion and effects of the proposed transaction between AT&T, Spinco, and Discovery constitute forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These estimates and statements are subject to risks and uncertainties, and actual results might differ materially. Such estimates and statements include, but are not limited to, statements about the benefits of the transaction, including future financial and operating results, the combined Spinco and Discovery company’s plans, objectives, expectations and intentions, and other statements that are not historical facts. Such statements are based upon the current beliefs and expectations of the management of AT&T and Discovery and are subject to significant risks and uncertainties outside of our control. Among the risks and uncertainties that could cause actual results to differ from those described in the forward-looking statements are the following: the occurrence of any event, change or other circumstances that could give rise to the termination of the proposed transaction; the risk that Discovery stockholders may not approve the transaction proposals; the risk that the necessary regulatory approvals may not be obtained or may be obtained subject to conditions that are not anticipated; risks that any of the other closing conditions to the proposed transaction may not be satisfied in a timely manner; risks that the anticipated tax treatment of the proposed transaction is not obtained; risks related to litigation brought in connection with the proposed transaction; uncertainties as to the timing of the consummation of the proposed transaction; risks and costs related to the implementation of the separation of Spinco, including timing anticipated to complete the separation, any changes to the configuration of the businesses included in the separation if implemented; the risk that the integration of Discovery and Spinco being more difficult, time consuming or costly than expected; risks related to financial community and rating agency perceptions of each of AT&T and Discovery and its business, operations, financial condition and the industry in which it operates; risks related to disruption of management time from ongoing business operations due to the proposed merger; failure to realize the benefits expected from the proposed merger; effects of the announcement, pendency or completion of the proposed merger on the ability of AT&T, Spinco or Discovery to retain customers and retain and hire key personnel and maintain relationships with their suppliers, and on their operating results and businesses generally; and risks related to the potential impact of general economic, political and market factors on the companies or the proposed transaction. The effects of the COVID-19 pandemic may give rise to risks that are currently unknown or amplify the risks associated with the foregoing factors.

These risks, as well as other risks associated with the proposed transaction, are more fully discussed in the registration statement on Form S-4 filed by Discovery with the Securities and Exchange Commission (“SEC”), which includes a preliminary proxy statement/prospectus, the proxy statement/prospectus filed by Discovery with the SEC and first mailed to Discovery stockholders on February 10, 2022, and the registration statement on Form 10 filed by Spinco with the SEC, which includes a preliminary information statement, in connection with the proposed transaction. Discussions of additional risks and uncertainties are contained in AT&T’s and Discovery’s filings with

the Securities and Exchange Commission. Neither AT&T nor Discovery is under any obligation, and each expressly disclaims any obligation, to update, alter, or otherwise revise any forward-looking statements, whether written or oral, that may be made from time to time, whether as a result of new information, future events, or otherwise. Persons reading this announcement are cautioned not to place undue reliance on these forward-looking statements which speak only as of the date hereof.

Additional Information and Where to Find It

This communication may be deemed to be solicitation material in respect of the proposed transaction between AT&T, Spinco, and Discovery. In connection with the proposed transaction, Discovery filed a registration statement on Form S-4 with the SEC containing a preliminary prospectus of Discovery that also constitutes a preliminary proxy statement of Discovery. The Form S-4 was declared effective February 10, 2022 and the proxy statement/prospectus was first mailed to Discovery stockholders on February 10, 2022. In addition, Spinco filed a registration statement on Form 10 with the SEC containing a preliminary information statement. The Form 10 has not yet become effective. After the Form 10 is effective, the information statement will be made available to AT&T stockholders. The information in the preliminary information statement is not complete and may be changed. This communication is not a substitute for the registration statements, proxy statement/prospectus, information statement or any other document which AT&T, Spinco or Discovery may file with the SEC. STOCKHOLDERS OF AT&T AND DISCOVERY ARE URGED TO READ ALL RELEVANT DOCUMENTS FILED WITH THE SEC, INCLUDING THE REGISTRATION STATEMENTS, THE PROXY STATEMENT/PROSPECTUS AND THE INFORMATION STATEMENT WHEN IT BECOMES AVAILABLE BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders are able to obtain copies of the proxy statement/prospectus as well as other filings containing information about AT&T, Spinco and Discovery, without charge, at the SEC’s website, http://www.sec.gov. Copies of documents filed with the SEC by AT&T or Spinco will be made available free of charge on AT&T’s investor relations website at https://investors.att.com. Copies of documents filed with the SEC by Discovery will be made available free of charge on Discovery’s investor relations website at https://ir.corporate.discovery.com/investor-relations.These documents do not relate to the senior unsecured notes offering referred to above, which is being conducted on a private basis.

No Offer or Solicitation

This communication is for informational purposes only and is not intended to and does not constitute an offer to sell, or the solicitation of an offer to subscribe for or buy, or a solicitation of any vote or approval in any jurisdiction, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in which such offer, sale or solicitation 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, and otherwise in accordance with applicable law.

Participants in Solicitation

This communication is not a solicitation of a proxy from any investor or security holder. However, AT&T and certain of its directors and executive officers, and Discovery and its directors and executive officers, may be deemed to be participants in the solicitation of proxies from the holders of Discovery capital stock and/or the offering of Discovery securities in respect of the proposed transaction. Information about the directors and executive officers of AT&T is set forth in the proxy statement for AT&T’s 2021 Annual Meeting of Stockholders, which was filed with the SEC on March 11, 2021. Information about the directors and executive officers of Discovery is set forth in the proxy statement for Discovery’s 2021 Annual Meeting of Stockholders, which was filed with the SEC on April 30, 2021. Additional information regarding the interests of these participants can also be found in the Form S-4 filed by Discovery with the SEC, which includes a preliminary proxy statement/prospectus, the proxy statement/prospectus filed by Discovery with the SEC and first mailed to Discovery stockholders on February 10, 2022, and the registration statement on Form 10 filed by Spinco with the SEC, which includes a preliminary information statement. These documents can be obtained free of charge from the sources indicated above.