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 Tower Corporation

(Exact name of registrant as specified in its charter)

Delaware	65-0723837
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)

116 Huntington Avenue

Boston, Massachusetts 02116

(Address of Principal Executive Offices) (Zip Code)

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

Title of each class	Name of each exchange on which
to be so registered	each class is to be registered
4.125% senior notes due 2027	New York Stock Exchange
4.625% senior notes due 2031	New York Stock Exchange

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), check the following box. ý

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), check the following box. ¨

Securities Act registration statement file number to which this form relates:

333-265348 (if applicable)

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

None

Item 1. Description of the Registrant’s Securities to be Registered

The description of the 4.125% senior notes due 2027 and the 4.625% senior notes due 2031 of American Tower Corporation (the “Registrant”) is set forth under the caption “Description of Notes” in the prospectus supplement dated May 9, 2023, as filed with the Securities and Exchange Commission (the “Commission”) on May 10, 2023 pursuant to Rule 424(b)(2) under the Securities Act of 1933, as amended, to the Registrant’s registration statement on Form S-3 (File No. 333-265348), as filed with the Commission on June 1, 2022, which description is incorporated herein by reference.

Item 2. Exhibits

Exhibit No.	Description
4.1	Indenture, dated June 1, 2022, by and between the Registrant and U.S. Bank Trust Company, National Association, as Trustee (incorporated by reference to Exhibit 4.32 of the Registrant’s Registration Statement on Form S-3ASR (File No. 333-265348) filed on June 1, 2022).
4.2	Supplemental Indenture No. 2, dated May 16, 2023, by and among the Registrant, U.S. Bank Trust Company, National Association, as trustee, and Elavon Financial Services DAC, UK Branch, as paying agent (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K (File No. 001-14195) filed on May 16, 2023).
4.3	Form of Global Note (included in Exhibit 4.2).

Signature

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

		AMERICAN TOWER CORPORATION
		(Registrant)
Date:	May 16, 2023	By:	/s/ Rodney M. Smith
			Rodney M. Smith
			Executive Vice President, Chief Financial Officer and Treasurer