Business Combination Prospectus (Form 425)

Filed by M3-Brigade Acquisition V Corp.

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: M3-Brigade Acquisition V Corp.

Commission File No. 001-42171

Subject Company: ReserveOne, Inc.

Subject Company: ReserveOne Holdings, Inc.

Date: July 8, 2025

As previously disclosed, on July 7, 2025, M3-Brigade Acquisition V Corp. ("M3-Brigade"), ReserveOne, Inc. a Delaware corporation ("ReserveOne" or the "Company"), ReserveOne Holdings, Inc., wholly-owned subsidiary of ReserveOne ("Pubco"), R1 SPAC Merger Sub, Inc., a wholly-owned subsidiary of Pubco and R1 Company Merger Sub, Inc., a wholly-owned subsidiary of Pubco, entered into a Business Combination Agreement (the "Business Combination Agreement").

On July 8, 2025, the Company posted the below communications on its website.

Crypto Without the Chaos: An Improved Onramp for Retail and Institutional Investors

Cryptocurrency has captured the imagination of millions, but for many investors, retail and institutional alike, it still feels too risky, too complicated, or too unregulated.

Wallets, keys, exchanges, gas fees, smart contracts, security breaches, regulatory gray areas. It's a lot to absorb. And while the potential for returns is real, so is the potential for loss and confusion.

ReserveOne was created to change that dynamic. We believe in crypto without the chaos.

Our solution is simple: we plan to offer diversified exposure to the digital asset space in the form of a publicly traded company, but anchored in next-generation assets. No wallets. No self-custody. No need to decipher blockchain protocols.

You will be able to buy ReserveOne the same way you buy shares of Apple or Microsoft. Your shares will live inside your brokerage account. We will follow SEC regulations. We will report earnings. We will protect investor funds with institutional-grade custody. We plan to be crypto, reimagined for the traditional investor.

This is especially important for those who want exposure to the asset class but are wary of volatility and headlines. We plan to manage the complexity behind the scenes, from staking and rebalancing to security and compliance, so that you won't have to.

Our portfolio will be inspired by the U.S. Strategic Reserve and the Digital Asset Stockpile (once established): anchored in Bitcoin, diversified across high-utility digital assets, and will be actively managed with long-term value in mind. This won't be a speculative fund chasing meme coins. It will be a disciplined investment vehicle built to bridge two worlds: the potential of blockchain and the reliability of public markets.

For institutions, ReserveOne aims to solve major compliance and fiduciary challenges. For retail investors, it strives to remove the friction of entry. And for both, it offers a long-term strategy rooted in fundamentals, not hype.

The digital asset revolution is real, but participation shouldn't require a PhD in cryptography. With ReserveOne, you don't need to master the mechanics of the ecosystem; you just need to believe in its future.

Crypto isn't chaotic when it's built on trust, transparency, and time-tested governance. That's our approach. That's the onramp we're building.

Additional Information and Where to Find It

In connection with the proposed business combination among M3-Brigade, ReserveOne and Pubco (Pubco, together with M3-Brigade and the Company, the "Parties") and related transactions (the "Proposed Business Combination"), Pubco intends to file with the Securities and Exchange Commission ("SEC") a registration statement on Form S-4 that will include a proxy statement of M3-Brigade and a prospectus (the "proxy statement/prospectus"), as well as other relevant documents concerning the Proposed Business Combination. M3-Brigade will mail the proxy statement/prospectus to its shareholders, seeking their approval of the Proposed Business Combination. INVESTORS AND SHAREHOLDERS OF M3-BRIGADE ARE URGED TO READ CAREFULLY AND IN THEIR ENTIRETY THE PROXY STATEMENT/PROSPECTUS REGARDING THE PROPOSED BUSINESS COMBINATION WHEN IT BECOMES AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Investors and shareholders will be able to obtain a free copy of the proxy statement/prospectus, as well as other filings containing information about M3-Brigade, Pubco and/or ReserveOne, without charge, once available, at the SEC's website (http://www.sec.gov). Copies of the proxy statement/prospectus and the filings with the SEC that will be incorporated by reference in the proxy statement/prospectus can also be obtained, without charge, from M3-Brigade by going to M3-Brigade's website, www.m3-brigade.com/m3-brigade-acquisition-iii-corp, or from ReserveOne by directing a request to info@reserveone.com.

No Offer or Solicitation

This information contained in this report is for informational purposes only and is not intended to and does not constitute an offer to subscribe for, buy or sell, the solicitation of an offer to subscribe for, buy or sell or an invitation to subscribe for, buy or sell any securities or the solicitation of any vote or approval in any jurisdiction pursuant to or in connection with the proposed transactions or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended (the "Securities Act") and otherwise in accordance with applicable law.

Participants in the Solicitation

Each of M3-Brigade, ReserveOne, Pubco and their respective directors, executive officers and certain other members of management and employees may be deemed under SEC rules to be participants in the solicitation of proxies from M3-Brigade's shareholders in connection with the Proposed Business Combination. Information regarding the persons who may be considered participants in the solicitation of proxies in connection with the Proposed Business Combination, including a description of their direct or indirect interests, by security holdings or otherwise, will be set forth in the proxy statement/prospectus and other relevant materials when they are filed with the SEC. Information regarding the directors and executive officers of M3-Brigade is set forth in Part II, Item 10. Directors, Executive Officers and Corporate Governance of M3-Brigade's Annual Report on Form 10-K. Information regarding the identity of all potential participants, and their direct and indirect interests, by security holdings or otherwise, will be set forth in the proxy statement/prospectus and other relevant materials filed with the SEC. These documents can be obtained free of charge from the sources indicated above.

Cautionary Statement Regarding Forward-Looking Statements

Certain statements herein may constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended, and Rule 3b-6 promulgated thereunder, which statements involve inherent risks and uncertainties.

Examples of forward-looking statements include, but are not limited to, statements with respect to the Proposed Business Combination. Such statements include expectations, hopes, beliefs, intentions, plans, prospects, financial results of strategies regarding the Company, PubCo, the Proposed Business Combination and statements regarding the anticipated benefits and timing of the completion of the Proposed Business Combination, the price and volatility of cryptocurrencies, the growing prominence of cryptocurrencies, the macro and political conditions surrounding cryptocurrencies, plans and use of proceeds, objectives of management for future operations of the Company and PubCo, expected operating costs of PubCo, the Company and its subsidiaries, the upside potential and opportunity for investors, the Company's plan for value creation and strategic advantages, market site and growth opportunities, regulatory conditions, competitive position and the interest of other corporations in similar business strategies, technological and market trends, future financial condition and performance and expected financial impacts of the Proposed Business Combination, the satisfaction of closing conditions to the Proposed Business Combination and the level of redemptions of M3-Brigade's public shareholders, and the Company's and PubCo's expectations, intentions, strategies, assumptions or beliefs about future events, results at 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 based on assumptions as of the time they are made and are subject to risks, uncertainties and other factors that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence, which could cause actual results to differ materially from anticipated results expressed or implied by such forward-looking statements. Such risks, uncertainties and assumptions, include, but are not limited to:

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the risk related to ReserveOne's lack of operating history as an early stage company, and the information included on this report discusses a business plan that ReserveOne expects to implement upon consummation of the Proposed Business Combination;

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the risk related to how ReserveOne's anticipated business strategy is intended to track the U.S. Strategic Bitcoin Reserve and Digital Asset Stockpile which currently does not exist, and if the U.S. Department of Treasury does not establish the U.S. Strategic Bitcoin Reserve or Digital Asset Stockpile, or if in the future the U.S. Congress or any U.S. President were to take action to dismantle any such reserve or stockpile, then ReserveOne would need to change its business plan which could materially adversely affect its financial position, operations and prospects;

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the risk that the Proposed Business Combination may not be completed in a timely manner or at all;

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the failure by the Parties to satisfy the conditions to the consummation of the Proposed Business Combination, including the approval of M3-Brigade's shareholders;

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the failure to realize the anticipated benefits of the Proposed Business Combination;

	●	the limitations on our investments in certain tokens and allocations to yield generation and venture activities under securities laws;

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the outcome of any potential legal proceedings that may be instituted against PubCo, ReserveOne, M3-Brigade or others following announcement of the Proposed Business Combination;

●

the level of redemptions of M3-Brigade'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 of M3-Brigade or the shares of Class A common stock of PubCo;

●

the failure of PubCo to obtain or maintain the listing of its securities on any stock exchange on which the Class A common stock of PubCo will be listed after closing of the Proposed Business Combination;

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costs related to the Proposed Business Combination and as a result of PubCo becoming a public company;

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changes in business, market, financial, political and regulatory conditions;

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risks relating to ReserveOne's anticipated operations and business, including the highly volatile nature of the price of cryptocurrencies; risks related to increased competition in the industries in which ReserveOne will operate;

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risks relating to significant legal, commercial, regulatory and technical uncertainty regarding cryptocurrencies; risks related to the treatment of cryptocurrency and other digital assets for U.S. and federal, state, local and non-U.S. tax purposes;

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risks that after consummation of the Proposed Business Combination, ReserveOne experiences difficulties managing its growth and expanding operations;

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challenges in implementing the business plan, due to lack of an operating history, operational challenges, significant competition and regulation;

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being considered to be a "shell company" by any stock exchange or by the SEC; and

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those risk factors discussed in documents of M3-Brigade or PubCo filed, or to 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 in the final prospectus of M3-Brigade dated as of July 31, 2024 and filed by M3-Brigade with the SEC on August 2, 2024, M3-Brigade's Quarterly Reports on Form 10-Q, M3-Brigade's Annual Report on Form 10-K and the registration statement on Form S-4 and proxy statement/prospectus that will be filed by PubCo and M3-Brigade, and other documents filed or to be filed by M3-Brigade 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 neither ReserveOne, PubCo or M3-Brigade presently know or 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 the Parties or any of their representatives 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 the Parties or any of their representatives gives any assurance that any of ReserveOne, PubCo or M3-Brigade will achieve its expectations. The inclusion of any statement in this Report does not constitute an admission by ReserveOne, PubCo, M3 Brigade or any other person that the events or circumstances described in such statement are material.

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