RBAC RedBall Acquisition Corp

Item 1.01 Entry into a Material Definitive Agreement.

As previously disclosed, on October 13, 2021, RedBall Acquisition Corp., a Cayman Islands exempted company (“RedBall”), entered into the Business Combination Agreement and Plan of Reorganization (as amended by that certain First Amendment to Business Combination Agreement and Plan of Reorganization, dated as of December 12, 2021, and as it may be further amended, supplemented or otherwise modified from time to time, the “Business Combination Agreement”), with Showstop Merger Sub I Inc., a Delaware corporation and a wholly owned subsidiary of RedBall (“Merger Sub One”), Showstop Merger Sub II LLC, a Delaware limited liability company and a wholly owned subsidiary of RedBall (“Merger Sub Two”), and SeatGeek, Inc., a Delaware corporation (“SeatGeek”). The Business Combination Agreement provides, among other things, that on the terms and subject to the conditions set forth therein, (a) RedBall will domesticate as a Delaware corporation, (b) Merger Sub One will then merge with and into SeatGeek, with SeatGeek continuing as the surviving corporation, and (c) SeatGeek, as the surviving corporation, will then merge with and into Merger Sub Two, with Merger Sub Two continuing as the surviving entity.

On March 28, 2022, RedBall, Merger Sub One, Merger Sub Two and SeatGeek entered into the Second Amendment to the Business Combination Agreement (the “Second Amendment”) amending the Business Combination Agreement to change the Agreement End Date (as such term is defined in the Business Combination Agreement) from April 13, 2022, to June 27, 2022, amend certain disclosures in the Company Disclosure Letter (as such term is defined in the Business Combination Agreement) in connection therewith, and amend certain provisions related to designation of the directors of SeatGeek immediately after the Effective Time (as such term is defined in the Business Combination Agreement). The transaction is expected to close in the second quarter of 2022, subject to customary closing conditions, including the receipt of regulatory approvals, and approval by RedBall’s shareholders.

The foregoing description of the Second Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the Second Amendment, a copy of which is attached to this Current Report on Form 8-K as Exhibit 2.1 and is incorporated herein by reference.

Important Additional Information and Where to Find It

RedBall has filed a registration statement on Form S-4 (“Registration Statement”) with the Securities and Exchange Commission (“SEC”), which includes a proxy statement/prospectus of RedBall, which will be both the proxy statement to be distributed to holders of RedBall’s ordinary shares in connection with its solicitation of proxies for the vote by RedBall’s shareholders with respect to the proposed business combination and other matters as may be described in the Registration Statement, as well as the prospectus relating to the offer of the securities to be issued in the business combination to SeatGeek stockholders. After the Registration Statement is declared effective, RedBall will mail a definitive proxy statement/prospectus to the shareholders of RedBall as of a record date to be established for voting on the proposed business combination. This Current Report on Form 8-K does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision with respect to the business combination. Before making any voting or investment decision, investors and security holders of RedBall and other interested persons are urged to carefully read the entire Registration Statement, the preliminary proxy statement/prospectus and the definitive proxy statement/prospectus, when they each become available, and any other relevant documents filed with the SEC, as well as any amendments or supplements to these documents, because they will contain important information about the proposed business combination. The

documents filed by RedBall with the SEC may be obtained free of charge at the SEC’s website at www.sec.gov. In addition, the documents filed by RedBall may be obtained free of charge from RedBall at www.redballac.com. Alternatively, these documents, when available, can be obtained free of charge from RedBall upon written request to RedBall Acquisition Corp., 667 Madison Avenue, 16th Floor, New York, NY 10065. The information contained on, or that may be accessed through, the websites referenced in this Current Report on Form 8-K is not incorporated by reference into, and is not a part of, this Current Report on Form 8-K.

Participants in the Solicitation

RedBall and its directors and executive officers may be deemed to be participants in the solicitation of proxies from the shareholders of RedBall with respect to the proposed business combination. For information regarding RedBall’s directors and executive officers and a description of their interests in RedBall, please see RedBall’s final prospectus related to its initial public offering filed with the SEC on August 13, 2020 and available free of charge at the SEC’s website at www.sec.gov. To the extent such holdings of RedBall’s securities may have changed since that time, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Additional information regarding the interests of those participants and other persons who may be deemed participants in the transaction may be obtained by reading the Registration Statement and proxy statement/prospectus and other relevant documents when they become available.

SeatGeek and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the shareholders of RedBall in connection with the proposed business combination. A list of the names of such directors and executive officers and information regarding their interests in the proposed business combination are included in the Registration Statement and proxy statement/prospectus for the proposed business combination.

Forward-Looking Statements

This report contains certain statements that are forward-looking statements for purposes of the safe harbor provisions under the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements generally are accompanied by words such as “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “should,” “would,” “plan,” “predict,” “potential,” “seem,” “seek,” “future,” “outlook,” and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding the proposed business combination between RedBall and SeatGeek, including the anticipated timing for closing. If any of these risks materialize or our assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. There may be additional risks that neither RedBall nor SeatGeek presently knows, or that RedBall or SeatGeek currently believe are immaterial, that could also cause actual results to differ from those contained in the forward-looking statements. You should not place undue reliance on forward-looking statements, which speak only as of the date of this report. Except as may be required under applicable securities laws, RedBall and SeatGeek do not undertake any obligation to update these forward-looking statements and RedBall and SeatGeek specifically disclaim any obligation to do so These forward-looking statements are subject to a number of risks and uncertainties, including, but not limited to, the impact of the COVID-19 pandemic; changes in domestic and foreign business, market, financial, political, and legal conditions; the inability of the parties to successfully or timely consummate the proposed business combination, including the risk that the approval of the shareholders of RedBall or SeatGeek is not obtained or the failure of other closing conditions; the risk that any regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the proposed business combination; failure to realize the anticipated benefits of the proposed business combination; the inability to obtain or maintain the listing of RedBall’s shares on the NYSE following the business combination; costs related to the business combination; the risk that the business combination disrupts current plans and operations as a result of the announcement and consummation of the business combination; risks relating to the uncertainty of the projected financial information with respect to SeatGeek; risks related to the performance of SeatGeek’s business and the timing of expected business or revenue milestones; the effects of competition on SeatGeek’s business; SeatGeek’s history of operating losses and expectations of significant expenses and continuing losses for the foreseeable future; the ability of SeatGeek to maintain an effective system of internal control over financial reporting; the ability of SeatGeek to respond to economic and other factors adversely affecting the live event industry and general economic conditions; the ability of SeatGeek to grow market share in its existing markets or any new markets it may enter; the ability of SeatGeek to manage its growth effectively; the ability of SeatGeek to manage market and technology trends; the ability of SeatGeek to access sources of capital, including

debt financing and other sources of capital to finance operations and growth; the ability of SeatGeek to maintain and enhance its products and brand, and to attract customers; the success of SeatGeek’s strategic relationships with third parties; the risk of cybersecurity attacks, data loss or other breaches of SeatGeek’s network security; the ability of SeatGeek to comply with governmental regulations; the amount of redemption requests made by RedBall’s stockholders; the ability of RedBall or SeatGeek to issue equity or equity-linked securities or obtain debt financing in connection with the proposed business combination or in the future; and those risks and uncertainties set forth under the headings “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in the registration statement on Form S-4 and proxy statement/prospectus discussed below and other documents filed by RedBall from time to time with the SEC. In addition, forward-looking statements are based on current expectations and beliefs concerning future developments and their potential effects on RedBall or SeatGeek. There can be no assurance that future developments affecting RedBall or SeatGeek will be those that RedBall or SeatGeek have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control or the control of RedBall or SeatGeek) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. Should one or more of these risks or uncertainties materialize, or should any of RedBall’s or SeatGeek’s assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. Some of these risks and uncertainties may in the future be amplified by the continued spread of COVID-19 or variants thereof. It is not possible to predict or identify all such risks. RedBall and SeatGeek do not undertake any obligation to update these forward-looking statements and RedBall and SeatGeek specifically disclaim any obligation to do so, except as may be required under applicable securities laws.

No Offer or Solicitation

This Current Report on Form 8-K does not constitute (i) a solicitation of a proxy, consent or authorization with respect to any securities or in respect of the proposed business combination or (ii) an offer to sell, a solicitation of an offer to buy, or a recommendation to purchase any security of RedBall, SeatGeek or any of their respective affiliates, nor shall there be any sale of securities in any states or jurisdictions in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.