Exhibit 5.1
BGC GROUP, INC.
July 3, 2023
BGC Group, Inc.
499 Park Avenue
New York, New York 10022
Ladies and Gentlemen:
I am the Executive Vice President,
General Counsel and Assistant Corporate Secretary of BGC Group, Inc., a Delaware corporation (BGC Group). You have requested my opinion with respect to the matters set forth below in connection with BGC Groups filing,
pursuant to Rule 414(d) under the Securities Act of 1933, as amended (the Securities Act), of Post-Effective Amendment No. 1 to the Registration Statement on Form S-8, File No. 333-259263, originally filed by BGC Partners, Inc., a Delaware corporation (BGC Partners), with the U.S. Securities and Exchange Commission (the SEC) on
September 2, 2021 (the Registration Statement). The Registration Statement related to the registration under the Securities Act of the offer and sale of up to 1,000,000 shares of BGC Partners Class A common stock, par
value $0.01 per share (BGC Partners Class A Common Stock), together with an indeterminate amount of plan interests to be offered or sold pursuant to the BGC Partners, Inc. Deferral Plan for Employees of BGC
Partners, Inc., Cantor Fitzgerald, L.P. and their Affiliates (the Predecessor Plan). As of this time, 803,890 shares of BGC Partners Class A Common Stock remain unsold pursuant to the Registration Statement.
As a result of a corporate conversion that was completed on July 1, 2023 (the Corporate Conversion), BGC Group became the public
holding company for BGC Partners and, pursuant to Rule 12g-3 under the Securities Exchange Act of 1934, as amended (the Exchange Act), succeeded to BGC Partners registration under the
Exchange Act. On July 3, 2023, BGC Group filed a Form 8-K12B reporting that it was the successor registrant to BGC Partners.
Pursuant to the Corporate Conversion, each share of BGC Partners Class A Common Stock outstanding at the effective time of the Corporate Conversion was
converted into one share of BGC Group Class A common stock, par value $0.01 per share (BGC Group Class A Common Stock). In addition, in connection with the Corporate Conversion, BGC Group assumed and
adopted the Predecessor Plan, as amended and restated as the BGC Group, Inc. Deferral Plan for Employees of BGC Group, Inc., Cantor Fitzgerald, L.P. and their Affiliates (the Deferral Plan). The Registration Statement, as amended
by Post-Effective Amendment No. 1, now relates to the offer and sale by BGC Group of up to 803,890 shares of BGC Group Class A Common Stock (the Shares) and an indeterminate amount of plan interests under the Deferral
Plan.
For the purposes of this opinion letter, I, or attorneys working under my direction (collectively, we), have examined the
Registration Statement and Post-Effective Amendment No. 1, the Deferral Plan and the originals, or duplicates or certified or conformed copies, of such corporate records, agreements, documents and other instruments, including the Amended and
Restated Certificate of Incorporation and the Amended and Restated Bylaws of BGC Group, and have made such other investigations as we have deemed relevant and necessary in connection with the opinions set forth below. As to questions of fact
material to this opinion letter, we have relied, with your approval, upon oral and written representations of officers and other representatives of BGC Group and certificates or comparable documents of public officials and of officers and other
representatives of BGC Group.
In making such examination and rendering the opinions set forth below, we have assumed without verification the genuineness
of all signatures, the authenticity of all documents submitted to us as originals, that all documents submitted to us as certified copies are true and correct copies of such originals, the authenticity of the originals of such documents submitted to
us as certified copies, the conformity to originals of all documents submitted to us as copies, the authenticity of the originals of such documents and the legal capacity of all individuals executing any of the foregoing documents.
We have assumed that the Shares to be offered and sold from time to time will be duly authorized and issued in accordance with the Amended and Restated
Certificate of Incorporation and Amended and Restated Bylaws of BGC Group, the authorizing resolutions of the Board of Directors of BGC Group or a committee thereof, and applicable law, and that any certificates evidencing such Shares will be duly
executed and delivered against receipt of the consideration approved by BGC Group, which will be no less than the par value thereof.