ALLE Allegion Plc

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 12(g) OF

THE SECURITIES EXCHANGE ACT OF 1934

ALLEGION PUBLIC LIMITED COMPANY

(Exact name of registrant as specified in its charter)

ALLEGION US HOLDING COMPANY INC.

(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: 333-278323 (if applicable)

Securities to be registered pursuant to Section 12(g) of the Act: None

INFORMATION REQUIRED IN REGISTRATION STATEMENT

Allegion US Holding Company Inc. (the “Company”) and Allegion plc (the “Guarantor” and, together with the Company, the “Registrants”) have filed with the Securities and Exchange Commission (the “Commission”) pursuant to Rule 424(b) under the Securities Act of 1933, as amended, a prospectus supplement, dated May 21, 2024 (the “Prospectus Supplement”), to a prospectus, dated March 28, 2024 (the “Base Prospectus”), contained in the Registrants’ effective Registration Statement on Form S-3 (Registration No. 333-278323), filed with the Commission by the Registrants on March 28, 2024. The Prospectus Supplement relates to the $400,000,000 aggregate principal amount of 5.600% Senior Notes due 2034 (the “Notes”) issued by the Company. The Notes are fully and unconditionally guaranteed by the Guarantor.

The description of the Notes contained under the heading “Description of the Debt Securities” in the Base Prospectus and under the heading “Description of the Notes” in the Prospectus Supplement are incorporated herein by reference.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrants have duly caused this Registration Statement to be signed on their behalf by the undersigned, thereto duly authorized.

Date: May 29, 2024