Business Combination Prospectus (Form 425)

Filed by Cantor Equity Partners II, Inc.

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: Cantor Equity Partners II, Inc.

Commission File No. 001-42630

Securitize Holdings, Inc.

Date: October 29, 2025

As previously disclosed, on October 27, 2025, Cantor Equity Partners II, Inc. ("CEPT"), a Cayman Islands exempted company, and Securitize, Inc., a Delaware corporation ("Securitize"), entered into a Business Combination Agreement (the "Business Combination Agreement"), with Securitize Holdings, Inc., a Delaware corporation ("Pubco"), Pinecrest Merger Sub, a Cayman Islands exempted company ("CEPT Merger Sub") and Senna Merger Sub, Inc., a Delaware corporation ("Securitize Merger Sub").

On October 28, 2025, Securitize posted the following through X:

On October 28, 2025, CEPT and certain related persons, including its Chief Executive Officer, posted the following through various social media channels (including X and LinkedIn):

***

Additional Information and Where to Find It

Pubco and Securitize intend to file with the Securities and Exchange Commission (the "SEC") a Registration Statement on Form S-4 (as may be amended, the "Registration Statement"), which will include a preliminary proxy statement of CEPT and a prospectus (the "Proxy Statement/Prospectus") in connection with the business combination pursuant to the Business Combination Agreement (the "Business Combination"), the concurrent private placement of certain Class A ordinary shares of CEPT (the "PIPE"), and any related transactions (collectively with the Business Combination and the PIPE, the "Proposed Transactions"). The definitive proxy statement and other relevant documents will be mailed to shareholders of CEPT as of a record date to be established for voting on the Business Combination and other matters as described in the Proxy Statement/Prospectus. CEPT and/or Pubco will also file other documents regarding the Proposed Transactions with the SEC. This communication does not contain all of the information that should be considered concerning the Proposed Transactions and is not intended to form the basis of any investment decision or any other decision in respect of the Proposed Transactions. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, SHAREHOLDERS OF CEPT AND OTHER INTERESTED PARTIES ARE URGED TO READ, WHEN AVAILABLE, THE PRELIMINARY PROXY STATEMENT/PROSPECTUS, AND AMENDMENTS THERETO, AND THE DEFINITIVE PROXY STATEMENT/PROSPECTUS AND ALL OTHER RELEVANT DOCUMENTS FILED OR THAT WILL BE FILED WITH THE SEC IN CONNECTION WITH CEPT'S SOLICITATION OF PROXIES FOR THE EXTRAORDINARY GENERAL MEETING OF ITS SHAREHOLDERS TO BE HELD TO APPROVE THE PROPOSED TRANSACTIONS AND OTHER MATTERS AS DESCRIBED IN THE PROXY STATEMENT/PROSPECTUS BECAUSE THESE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION ABOUT CEPT, PUBCO, SECURITIZE AND THE PROPOSED TRANSACTIONS. Investors and security holders will also be able to obtain copies of the Registration Statement and the Proxy Statement/Prospectus and all other documents filed or that will be filed with the SEC by CEPT and Pubco, without charge, once available, on the SEC's website at www.sec.gov or by directing a request to: Cantor Equity Partners II, Inc., 110 East 59th Street, New York, NY 10022; e-mail: [email protected], or upon written request to Securitize, Inc., via email at [email protected], respectively.

NEITHER THE SEC NOR ANY STATE SECURITIES REGULATORY AGENCY HAS APPROVED OR DISAPPROVED THE PROPOSED TRANSACTIONS DESCRIBED HEREIN, PASSED UPON THE MERITS OR FAIRNESS OF THE BUSINESS COMBINATION OR ANY RELATED TRANSACTIONS OR PASSED UPON THE ADEQUACY OR ACCURACY OF THE DISCLOSURE IN THIS COMMUNICATION. ANY REPRESENTATION TO THE CONTRARY CONSTITUTES A CRIMINAL OFFENSE.

The Class A ordinary shares to be issued in the PIPE have not been registered under the Securities Act and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act.

Participants in the Solicitation

CEPT, Pubco, Securitize and their respective directors, executive officers, and certain of their shareholders and other members of management and employees may be deemed under SEC rules to be participants in the solicitation of proxies from CEPT's shareholders in connection with the Proposed Transactions. A list of the names of such persons, and information regarding their interests in the Proposed Transactions and their ownership of CEPT's securities are, or will be, contained in CEPT's filings with the SEC, including CEPT's prospectus filed on May 2, 2025. Additional information regarding the interests of the persons who may, under SEC rules, be deemed participants in the solicitation of proxies from CEPT's shareholders in connection with the Proposed Transactions, including the names and interests of CEPT's, Pubco's and Securitize's directors and executive officers, will be set forth in the Proxy Statement/Prospectus, which is expected to be filed by Pubco, Securitize and CEPT, as applicable, with the SEC. Investors and security holders may obtain free copies of these documents as described above.

No Offer or Solicitation

This communication and the information contained herein are for informational purposes only and are not a proxy statement or solicitation of a proxy, consent or authorization with respect to any securities or in respect of the Proposed Transactions and shall not constitute an offer to sell or exchange, or a solicitation of an offer to buy or exchange the securities of CEPT or Pubco, or any commodity or instrument or related derivative, nor shall there be any sale of any such securities in any state or jurisdiction in which such offer, solicitation, sale or exchange would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of the Securities Act or an exemption therefrom. Investors should consult with their counsel as to the applicable requirements for a purchaser to avail itself of any exemption under the Securities Act.

Forward-Looking Statements

This communication contains certain forward-looking statements within the meaning of the U.S. federal securities laws with respect to the Proposed Transactions involving Pubco, Securitize and CEPT, including expectations, hopes, beliefs, intentions, plans, prospects, financial results or strategies regarding Pubco, Securitize, CEPT and the Proposed Transactions and statements regarding the anticipated benefits and timing of the completion of the Proposed Transactions, the assets held by Pubco and Securitize, Pubco's listing on any securities exchange, the macro and political conditions surrounding digital assets, the planned business strategy, plans and use of proceeds, objectives of management for future operations of Pubco, pro forma ownership of Pubco, the upside potential and opportunity for investors, Pubco's plan for value creation and strategic advantages, market size and growth opportunities, investor benefits, regulatory conditions, competitive position, technological and market trends, future financial condition and performance and expected financial impacts of the Proposed Transactions, the satisfaction of closing conditions to the Proposed Transactions and the level of redemptions of CEPT's public shareholders, and Pubco's and Securitize's expectations, intentions, strategies, assumptions or beliefs about future events, results of operations or performance or that do not solely relate to historical or current facts. These forward-looking statements generally are identified by the words "believe," "project," "expect," "anticipate," "estimate," "intend," "strategy," "future," "opportunity," "potential," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," and similar expressions. Forward-looking statements are predictions, projections and other statements about future events or conditions that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties. Many factors could cause actual future events to differ materially from the forward-looking statements in this communication, including, but not limited to: the risk that the Proposed Transactions may not be completed in a timely manner or at all, which may adversely affect the price of CEPT's securities; the risk that the Proposed Transactions may not be completed by CEPT's business combination deadline; the failure by the parties to the Business Combination Agreement to satisfy the conditions to the consummation of the Business Combination, including the approval of CEPT's shareholders, or the consummation of the PIPE; failure to realize the anticipated benefits of the Proposed Transactions; the level of redemptions of CEPT's public shareholders which may reduce the public float of, reduce the liquidity of the trading market of, and/or maintain the quotation, listing, or trading of the Class A ordinary shares or the shares of common stock of Pubco; the lack of a third-party fairness opinion in determining whether or not to pursue the Business Combination; the failure of Pubco to obtain or maintain the listing of its securities on any securities exchange after closing of the Proposed Transactions; costs related to the Proposed Transactions and as a result of becoming a public company; changes in business, market, financial, political and regulatory conditions; risks relating to Pubco's anticipated operations and business, including the highly volatile nature of the price of digital assets; risks related to increased competition in the industries in which Pubco will operate; risks relating to significant legal, commercial, regulatory and technical uncertainty regarding digital assets and tokenization; risks relating to the treatment of digital assets for U.S. and foreign tax purposes; risks that after consummation of the Proposed Transactions, Pubco experiences difficulties managing its growth and expanding operations; challenges in implementing Pubco's business plan (including expanding and/or growing its advisory services business) due to operational challenges, significant competition and regulation; being considered to be a "shell company" by any stock exchange on which Pubco's common stock will be listed or by the SEC, which may impact Pubco's ability to list Pubco's common stock and restrict reliance on certain rules or forms in connection with the offering, sale or resale of securities; the outcome of any potential legal proceedings that may be instituted against Pubco, Securitize, CEPT or others following announcement of the Proposed Transactions, and those risk factors discussed in documents that Pubco and/or CEPT filed, or that will be filed, with the SEC.

The foregoing list of risk factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the "Risk Factors" section of the final prospectus of CEPT dated as of May 1, 2025 and filed by CEPT with the SEC on May 2, 2025, CEPT's Quarterly Reports on Form 10-Q, CEPT's Annual Report on Form 10-K and the Registration Statement that will be filed by Pubco and Securitize and the Proxy Statement/Prospectus contained therein, and other documents filed by CEPT and Pubco from time to time with the SEC. These filings do or will identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. There may be additional risks that CEPT, Securitize and Pubco do not presently know, or that CEPT, Securitize and Pubco currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements.

Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and none of CEPT, Securitize or Pubco assumes any obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. None of CEPT, Securitize or Pubco gives any assurance that any of CEPT, Securitize or Pubco will achieve its expectations. The inclusion of any statement in this communication does not constitute an admission by CEPT, Securitize or Pubco or any other person that the events or circumstances described in such statement are material.