Exhibit 5.1

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.653.8700 main 212.653.8701 fax www.sheppardmullin.com

April 29, 2026

VIA ELECTRONIC MAIL

C2 Capital Group, Inc.

7700 Congress Ave., Suite 3105

Boca Raton, FL 33487

Ladies and Gentlemen:

We are acting as counsel to C2 Capital Group, Inc. (the “Company”) in connection with its registration statement on Form S-1 (File No. 333-294994), as amended (as amended, the “Registration, Statement”) filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), relating to (i) the proposed public offering of 4,312,500 shares (the “Shares”) of common stock of the Company, par value $0.0001 per share (the “Common Stock”), including Shares issuable upon exercise of an option granted by the Company and (ii) the resale of 651,214 shares (the “Resale Shares” and together with the Shares, the “Securities”) of the Company’s Common Stock held by certain selling stockholders named therein. The Shares will be sold by the Company pursuant to an underwriting agreement to be entered into by and between the Company and D. Boral Capital LLC as the representative of the several underwriters to be named therein (the “Agreement”). This opinion letter is furnished to you at your request to enable you to fulfill the requirements of Item 601(b)(5) of Regulation S-K in connection with the Registration Statement.

In connection with this opinion, we have reviewed and relied upon the following:

In our examination, we have assumed the genuineness of all signatures, including endorsements, the legal capacity and competency of all natural persons, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as facsimile, electronic, certified or photocopy, and the authenticity of the originals of such copies. As to any facts relevant to the opinions stated herein that we did not independently establish or verify, we have relied upon statements and representations of officers and other representatives of the Company and others and of public officials.

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.653.8700 main 212.653.8701 fax www.sheppardmullin.com

Based upon, subject to and limited by the foregoing, we are of the opinion that:

We also hereby consent to the reference to our firm under the caption “Legal Matters” in the prospectus which forms part of the Registration Statement. In giving this consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Act, the rules and regulations of the Commission promulgated thereunder or Item 509 of Regulation S-K.

We express no opinion as to matters governed by any laws other than Chapter 78 of the NRS and the laws of the State of New York.  No opinion is expressed herein with respect to the qualification of the Securities under the securities or blue sky laws of any state or any foreign jurisdiction.

This opinion letter is rendered as of the date first written above and we disclaim any obligation to advise you of facts, circumstances, events or developments which hereafter may be brought to our attention and which may alter, affect or modify the opinion expressed herein. Our opinion is expressly limited to the matters set forth above and we render no opinion, whether by implication or otherwise, as to any other matters relating to the Company or the Securities, or any other agreements or transactions that may be related thereto or contemplated thereby. We are expressing no opinion as to any obligations that parties other than the Company may have under or in respect of the Securities or as to the effect that their performance of such obligations may have upon any of the matters referred to above. No opinion may be implied or inferred beyond the opinion expressly stated above.