SilverBox Corp IV

Exhibit 99.1

STRICTLY CONFIDENTIAL Parataxis Holdings, Inc. Investor Presentation May 2026 An Institutional Digital Asset Management Platform

General This 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”) and other transactions (together with the Business Combination, the “Transactions”) among SilverBox Corp IV (“SBXD”), Parataxis Holdings LLC (“Parataxis Holdings” or the “Company”), and Parataxis Holdings Inc . , a newly formed holding company that will become the publicly listed company (“ PubCo ”, and together with SBXD and the Company, the “Parties”) . The information contained herein does not purport to be all - inclusive and none of SBXD, 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 SBXD 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, SBXD 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 . The distribution of this Presentation may also be restricted by law and persons into whose possession this Presentation comes should inform themselves about and observe any such restrictions . The recipient acknowledges that it is (a) aware that the United States securities laws prohibit any person who has material, non - public information concerning a company from purchasing or selling securities of such company or from communicating such information to any other person under circumstances in which it is reasonably foreseeable that such person is likely to purchase or sell such securities, and (b) familiar with the Securities Exchange Act of 1934 , as amended, and the rules and regulations promulgated thereunder (collectively, the “Exchange Act”), and that the recipient will neither use, nor cause any third party to use, this Presentation or any information contained herein in contravention of the Exchange Act, including, without limitation, Rule 10 b - 5 thereunder . Confidentiality This information is being distributed to you on a confidential basis . By receiving this information, you and your affiliates and Representatives agree to maintain the confidentiality of the information contained herein . Without the express prior written consent of each of the Parties, this Presentation and any information contained within it may not be (i) reproduced (in whole or in part), (ii) copied at any time, (iii) used for any purpose other than your evaluation of the Parties and the Transactions or (iv) provided to any person except your employees and advisors with a need to know who are advised of the confidentiality of the information . This Presentation supersedes and replaces all previous oral or written communications between the parties hereto relating to the subject matter hereof . Disclaimers and Other Important Information 2

Forward - Looking Statements This Presentation (and any oral statements regarding the subject matter of this Presentation) contains certain forward - looking statements within the meaning of the U . S . federal securities laws with respect to the Parties and the Business Combination and the Transactions . The expectations, estimates, and projections of the businesses of the Company and SBXD may differ from their actual results and consequently, you should not rely on these forward - looking statements as predictions of future events . Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believe,” “predict,” “potential,” “continue,” and similar expressions are intended to identify such forward - looking statements . These forward - looking statements include, without limitation, future performance and anticipated financial impacts of the Transactions, the satisfaction of the closing conditions to the Transactions, and the timing of the completion of the Transactions . These forward - looking statements involve significant risks and uncertainties that could cause the actual results to differ materially from the expected results . Most of these factors are outside of the control of the Company, PubCo and SBXD and are difficult to predict . Factors that may cause such differences include, but are not limited to : ( 1 ) the Transactions not being completed in a timely manner or at all, which may adversely affect the price of SBXD’s securities ; ( 2 ) the Transactions not being completed by SBXD’s business combination deadline ; ( 3 ) the failure by the parties to satisfy the conditions to the consummation of the Transactions, including the