SilverBox Engaged Merger I : Investor Presentation dated December 2021 - Form 8-K

DISCLAIMER Disclaimer This investor presentation (this “Presentation”) is for informational purposes only to assist interested parties in making their own evaluation with respect to the proposed business combination (the “Business Combination”) among SilverBox Engaged Merger Corp I or one or more of its affiliates (“SilverBox”) and Authentic Brands, LLC (together with its subsidiaries, including Black Rifle Coffee Company LLC, the “Company”) or one or more of its affiliates. The information contained herein does not purport to be all-inclusive and none of SilverBox, the Company or their respective affiliates makes any representation or warranty, express or implied, as to the accuracy, completeness or reliability of the information contained in this Presentation. Neither the Company nor SilverBox has verified, or will verify, any part of this Presentation. The recipient should make its own independent investigations and analyses of the Company and its own assessment of all information and material provided, or made available, by the Company, SilverBox or any of their respective directors, officers, employees, affiliates, agents, advisors or representatives. This Presentation does not constitute a solicitation of a proxy, consent or authorization with respect to any securities or in respect of the proposed Business Combination. This Presentation shall also not constitute an offer to sell, a solicitation of an offer to buy, or a recommendation to purchase any securities, nor shall there be any sale of securities in any states or 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 offering of securities will be made except by means of a prospectus meeting the requirements of the Securities Act of 1933, as amended, or an exemption therefrom. You should not construe the contents of this Presentation as legal, tax, accounting or investment advice or a recommendation. You should consult your own counsel and tax and financial advisors as to legal and related matters concerning the matters described herein, and, by accepting this Presentation, you confirm that you are not relying upon the information contained herein to make any decision. Forward-Looking Statements Certain statements in this Presentation may be considered forward-looking statements. Forward-looking statements generally relate to future events or SilverBox’s or the Company’s future financial or operating performance. For example, projections of future Revenue and Adjusted EBITDA and other metrics are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may”, “should”, “expect”, “intend”, “will”, “estimate”, “anticipate”, “believe”, “predict”, “potential” or “continue”, or the negatives of these terms or variations of them or similar terminology. Such forward- looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward looking statements. These forward- looking statements are based upon estimates and assumptions that, while considered reasonable by SilverBox and its management, and the Company and its management, as the case may be, are inherently uncertain and are inherently subject to risks, variability and contingencies, many of which are beyond the Company’s control. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to the termination of negotiations and any subsequent definitive agreements with respect to the Business Combination; (2) the outcome of any legal proceedings that may be instituted against SilverBox, the combined company or others following the announcement of the Business Combination and any definitive agreements with respect thereto; (3) the inability to complete the Business Combination due to the failure to obtain approval of the stockholders of SilverBox, to obtain financing to complete the Business Combination or to satisfy other conditions to closing; (4) changes to the proposed structure of the Business Combination that may be required or appropriate as a result of applicable laws or regulations or as a condition to obtaining regulatory approval of the Business Combination; (5) the ability to meet stock exchange listing standards following the consummation of the Business Combination; (6) the risk that the Business Combination disrupts current plans and operations of the Company as a result of the announcement and consummation of the Business Combination; (7) the ability to recognize the anticipated benefits of the Business Combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain key relationships and retain its management and key employees; (8) costs related to the Business Combination; (9) changes in applicable laws or regulations; (10) the possibility that the Company or the combined company may be adversely affected by other economic, business, and/or competitive factors; (11) the Company’s estimates of expenses and profitability; (12) the failure to realize anticipated pro forma results or projections and underlying assumptions, including with respect to estimated stockholder redemptions, purchase price and other adjustments; and (13) other risks and uncertainties set forth in the section entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in SilverBox’s final prospectus relating to its initial public offering dated February 25, 2021, in the registration statement on Form S-4 (the “Form S-4”) relating to the business combination filed with the Securities and Exchange Commission (the “SEC”), and in subsequent filings with the SEC, including the final prospectus/proxy statement relating to the business combination. There may be additional risks that neither SilverBox nor the Company presently know or that SilverBox and the Company currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. Nothing in this Presentation should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-looking statements will be achieved. You should not place undue reliance on forward-looking statements, which speak only as of the date they are made. Neither SilverBox nor the Company undertakes any duty to update these forward-looking statements or to inform the recipient of any matters of which any of them becomes aware of which may affect any matter referred to in this Presentation. The Company and SilverBox disclaim any and all liability for any loss or damage (whether foreseeable or not) suffered or incurred by any person or entity as a result of anything contained or omitted from this Presentation and such liability is expressly disclaimed. The recipient agrees that it shall not seek to sue or otherwise hold the Company, SilverBox or any of their respective directors, officers, employees, affiliates, agents, advisors or representatives liable in any respect for the provision of this Presentation, the information contained in this Presentation, or the omission of any information from this Presentation. Black Rifle Coffee Company 1

DISCLAIMER (CONT’D) Non-GAAP Financial Measures This Presentation includes projections of certain financial measures not presented in accordance with generally accepted accounting principles (“GAAP”) including, but not limited to, EBITDA, EBITDA Margin, Adjusted EBITDA, Adjusted EBITDA Margin, Gross Profit, Average Unit Volume (“AUV”) and certain ratios and other metrics derived therefrom. These non-GAAP financial measures are not measures of financial performance in accordance with GAAP and may exclude items that are significant in understanding and assessing the Company’s financial results. Therefore, these measures should not be considered in isolation or as an alternative to net income, cash flows from operations or other measures of profitability, liquidity or performance under GAAP. You should be aware that the Company’s presentation of these measures may not be comparable to similarly-titled measures used by other companies. The Company believes these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to the Company’s financial condition and results of operations. The Company believes that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating ongoing operating results and trends in and in comparing the Company’s financial measures with other similar companies, many of which present similar non-GAAP financial measures to investors. These non-GAAP financial measures are subject to inherent limitations as they reflect the exercise of judgments by management about which expense and income are excluded or included in determining these non-GAAP financial measures. Use of Projections This Presentation contains financial forecasts with respect to the Company’s projected financial results, including Revenue and Adjusted EBITDA, for the Company’s fiscal years 2021 through 2023. The Company’s independent auditors have not audited, reviewed, compiled or performed any procedures with respect to the projections for the purpose of their inclusion in this Presentation, and accordingly, they did not express an opinion or provide any other form of assurance with respect thereto for the purpose of this Presentation. These projections should not be relied upon as being necessarily indicative of future results. 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. Accordingly, there can be no assurance that the prospective results are indicative of the future performance of the Company 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 by any person that the results contained in the prospective financial information will be achieved. Industry and Market Data This Presentation also contains estimates and other statistical data made by independent parties and by the Company relating to market size and growth and other data about the Company’s industry. This data involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. In addition, projections, assumptions, and estimates of the future performance of the markets in which the Company operates are necessarily subject to a high degree of uncertainty and risk. Any trademarks, servicemarks, trade names and copyrights of the Company and other companies contained in this Presentation are the property of their respective owners. Important Information About the Proposed Business Combination and Where to Find It This Presentation is being made in respect of the proposed transaction involving SilverBox and the Company. In connection with the proposed business combination, PubCo has filed a Registration Statement on Form S- 4 with the SEC. The Form S-4 includes a preliminary proxy statement of SilverBox and a preliminary prospectus of PubCo. After the Form S-4 has been declared effective by the SEC, a proxy statement/prospectus will be sent to all SilverBox stockholders as of a record date to be established for voting on the proposed business combination. SilverBox also will file other documents regarding the proposed business combination with the SEC. BEFORE MAKING ANY VOTING DECISION, INVESTORS AND SECURITY HOLDERS OF SILVERBOX ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ALL OTHER RELEVANT DOCUMENTS FILED OR THAT WILL BE FILED WITH THE SEC IN CONNECTION WITH THE PROPOSED BUSINESS COMBINATION AS THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED BUSINESS COMBINATION. This Presentation 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 in respect of the Business Combination. When available, the definitive proxy statement/prospectus and other relevant materials for the proposed Business Combination will be mailed to stockholders of SilverBox as of a record date to be established for voting on the proposed Business Combination. Stockholders will also be able to obtain copies of the preliminary proxy statement/prospectus, the definitive proxy statement/prospectus and other documents filed with the SEC, without charge, once available, at the SEC’s website at www.sec.gov. Participants in the Solicitation SilverBox, PubCo and their respective directors and executive officers may be deemed participants in the solicitation of proxies from SilverBox’s stockholders 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 SilverBox is contained in SilverBox’s final prospectus related to its initial public offering dated February 25, 2021, which was filed with the SEC and is available free of charge at the SEC’s website at www.sec.gov. Additional information regarding the interests of such participants will be contained in the proxy statement/prospectus for the proposed Business Combination when available. The Company and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the stockholders of SilverBox 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 will be included in the proxy statement for the proposed Business Combination when available. INVESTMENT IN ANY SECURITIES DESCRIBED HEREIN HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SEC OR ANY OTHER REGULATORY AUTHORITY NOR HAS ANY AUTHORITY PASSED UPON OR ENDORSED THE MERITS OF THE OFFERING OR THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED HEREIN. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. . Black Rifle Coffee Company 2