Vivid Seats SPAC Presentation Deck

Disclaimer (continued) Financial and Other Information This presentation includes certain non-GAAP financial measures (including on a forward-looking basis) such as EBITDA, EBITDA Margin, Adjusted EBITDA, Adjusted EBITDA Margin., Contribution Margin These non-GAAP measures are an addition, and not a substitute for or superior to, measures of financial performance prepared in accordance with GAAP and should not be considered as an alternative to net income, operating income or any other performance measures derived in accordance with GAAP. Vivid Seats believes that these non-GAAP measures of financial results (including on a forward-looking basis) provide useful supplemental information to investors about Vivid Seats. Vivid Seats' management uses forward-looking non-GAAP measures to evaluate Vivid Seats' projected financials and operating performance. However, there are a number of limitations related to the use of these non-GAAP measures and their nearest GAAP equivalents, including that they exclude significant expenses that are required by GAAP to be recorded in Vivid Seats' financial measures. In addition, other companies may calculate non-GAAP measures differently, or may use other measures to calculate their financial performance, and therefore, Vivid Seats' non-GAAP measures may not be directly comparable to similarly titled measures of other companies. Additionally, to the extent that forward-looking non-GAAP financial measures are provided, they are presented on a non-GAAP basis without reconciliations of such forward-looking non-GAAP measures due to the inherent difficulty in forecasting and quantifying certain amounts that are necessary for such reconciliations. Use of Projections This presentation also contains certain financial forecasts, including projected revenue, projected marketplace GOV and projected Adjusted EBITDA. Neither Horizon's nor Vivid Seats' independent auditors have studied, reviewed, compiled or performed any procedures with respect to the projections for the purpose of their inclusion in this presentation, and accordingly, neither of them expressed an opinion or provided any other form of assurance with respect thereto for the purpose of this presentation. These projections are for illustrative purposes only and should not be relied upon as being necessarily indicative of future results. In this presentation, certain of the above-mentioned projected information has been provided for purposes of providing comparisons with historical data. The assumptions and estimates underlying the prospective financial information are inherently uncertain and are subject to a wide variety of significant business, economic and competitive risks and uncertainties that could cause actual results to differ materially from those contained in the prospective financial information. Projections are inherently uncertain due to a number of factors outside of Horizon's or Vivid Seats' control. While all financial projections, estimates and targets are necessarily speculative, Horizon and Vivid Seats believe that the preparation of prospective financial information involves increasingly higher levels of uncertainty the further out the projection, estimate or target extends from the date of preparation. Accordingly, there can be no assurance that the prospective results are indicative of future performance of the combined company after the Transaction or that actual results will not differ materially from those presented in the prospective financial information. Inclusion of the prospective financial information in this presentation should not be regarded as a representation any person that the results contained in the prospective financial information will be achieved. Additional Information about the Business Combination and Where to Find It In connection with the proposed business combination, Horizon will merge with and into Vivid Seats Inc., which will be the surviving entity and the going-forward public company and has filed a registration statement on Form S-4 (the "Registration Statement") with the SEC, which includes a proxy statement/prospectus, and certain other related documents, to be used at the meeting of stockholders to approve the proposed business combination. INVESTORS AND SECURITY HOLDERS OF HORIZON ACQUISITION CORPORATION ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS, ANY AMENDMENTS THERETO AND OTHER RELEVANT DOCUMENTS THAT WILL BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT VIVID SEATS, HORIZON AND THE BUSINESS COMBINATION. The proxy statement/prospectus will be mailed to shareholders of Horizon as of a record date to be established for voting on the proposed business combination. Investors and security holders will also be able to obtain copies of the Registration Statement and other documents containing important information about each of the companies once such documents are filed with the SEC, without charge, at the SEC's web site at www.sec.gov. Participants in Solicitation Horizon and its directors and executive officers may be deemed participants in the solicitation of proxies from Horizon's members with respect to the proposed business combination. A list of the names of those directors and executive officers and a description of their interests in Horizon is contained in Horizon's filings with the SEC, including Horizon's Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which was filed with the SEC on March 31, 2021 and amended on May 10, 2021, and is available free of charge at the SEC's web site at www.sec.gov, or by directing a request to Horizon Acquisition Corporation, 600 Steamboat Road, Suite 200, Greenwich, CT 06830. Additional information regarding the interests of such participants will be set forth in the Registration Statement for the proposed business combination when available. Vivid Seats and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the shareholders of Horizon 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 business combination will be contained in the Registration Statement for the proposed business combination when available. Vividseats

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