EXHIBIT 5.1

Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York 10019-6064

September 2, 2025

Apollo Global Management, Inc.

9 West 57th Street, 42nd Floor

New York, New York 10019

Registration Statement on Form S-3ASR (File No. 333-271275)

Ladies and Gentlemen:

We have acted as special counsel to Apollo Global Management, Inc., a Delaware corporation (the “Company”), in connection with the Registration Statement on Form S-3ASR (File No. 333-271275) (the “Registration Statement”) of the Company, filed with the Securities and Exchange Commission pursuant to the Securities Act of 1933, as amended (the “Act”), and the rules and regulations thereunder (the “Rules”), which became effective on April 14, 2023. You have asked us to furnish our opinion as to the legality of 370,639 shares (the “Bridge Secondary Shares”) of the Company’s common stock, par value $0.00001 per share, that that are being registered under the Registration Statement today and may be offered by certain stockholders of the Company.

In connection with the furnishing of this opinion, we have examined originals, or copies certified or otherwise identified to our satisfaction, of the following documents (collectively, the “Documents”):

1.     the Registration Statement; and

2.     the prospectus supplement dated September 2, 2025 (the “Prospectus”).

In addition, we have examined (i) such corporate records of the Company that we have considered appropriate, including a copy of the amended and restated certificate of incorporation, as amended, and amended and restated bylaws, of the Company, certified by the Company as in effect on the date of this letter, and copies of resolutions of the board of directors and the executive committee of the board of directors of the Company relating to the issuance of the Bridge Secondary Shares, certified by the Company and (ii) such other certificates, agreements and documents that we deemed relevant and necessary as a basis for the opinions expressed below. We have also relied upon the factual matters contained in the representations and warranties of the Company made in the Documents and upon certificates of public officials and the officers of the Company.

In our examination of the documents referred to above, we have assumed, without independent investigation, the genuineness of all signatures, the legal capacity of all individuals who have executed any of the documents reviewed by us, the authenticity of all documents submitted to us as originals, the conformity to the originals of all documents submitted to us as certified, photostatic, reproduced or conformed copies of valid existing agreements or other documents, the authenticity of all the latter documents and that the statements regarding matters of fact in the certificates, records, agreements, instruments and documents that we have examined are accurate and complete.

Based upon the above, and subject to the stated assumptions, exceptions and qualifications, we are of the opinion that the Bridge Secondary Shares have been duly authorized by all necessary corporate action on the part of the Company and are validly issued, fully paid and non-assessable.

The opinion expressed above is limited to the General Corporation Law of the State of Delaware. Our opinion is rendered only with respect to the laws, and the rules, regulations and orders under those laws, that are currently in effect.

We hereby consent to use of this opinion as an exhibit to the Registration Statement and to the use of our name under the heading “Legal Matters” contained in the Prospectus. In giving this consent, we do not thereby admit that we come within the category of persons whose consent is required by the Act or the Rules.