Form 8-A12B American Exceptionalism

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR (g) OF

THE SECURITIES EXCHANGE ACT OF 1934

American Exceptionalism Acquisition Corp. A

(Exact name of registrant as specified in its charter)

Securities to be registered pursuant to Section 12(b) of the Act:

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e), check the following box. ☒

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. ☐

If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. ☐

Securities Act registration statement or Regulation A offering statement file number to which this form relates (if applicable):

File No. 333-289701

Securities to be registered pursuant to Section 12(g) of the Act:

None

The securities to be registered hereby are Class A ordinary shares, par value $0.0001 per share, of American Exceptionalism Acquisition Corp. A (the “Registrant”). The description of the Class A ordinary shares set forth under the heading “Description of Securities” in the Registrant’s prospectus that constitutes part of the Registration Statement on Form S-1 (File No. 333-289701) initially filed by the Registrant with the U.S. Securities and Exchange Commission on August 18, 2025, as subsequently amended and supplemented from time to time thereafter, including any form of prospectus contained therein filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, is incorporated herein by reference.

In accordance with the “Instructions as to Exhibits” with respect to Form 8-A, no exhibits are required to be filed as part of this registration statement because no other securities of the Registrant are registered on The New York Stock Exchange and the securities registered hereby are not being registered pursuant to Section 12(g) of the Securities Exchange Act of 1934, as amended.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto duly authorized.

Date: September 25, 2025