ALLE Allegion Plc

Pricing Term Sheet

Filed Pursuant to Rule 433

to Preliminary Prospectus dated September 19, 2019

Registration Statement No. 333-225019-01

Date: September 19, 2019

(1) An explanation of the significance of ratings may be obtained from the rating agencies. Generally, rating agencies base their ratings on such material and information, and such of their own investigations, studies and assumptions, as they deem appropriate. The rating of the Notes should be evaluated independently from similar ratings of other securities. A credit rating of a security is not a recommendation to buy, sell or hold securities and may be subject to review, revision, suspension, reduction or withdrawal at any time by the assigning rating agency.

(2) We expect that delivery of the notes will be made against payment therefor on or about September 27, 2019, which is the sixth business day following the date of pricing of the notes (this settlement cycle being referred to as “T+6”). Under Rule 15c6-1 of the Exchange Act, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade notes on the date of pricing or the next three succeeding business days will be required, by virtue of the fact that the notes initially will settle in T+6, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors.

The Issuer has filed an effective registration statement with the U.S. Securities and Exchange Commission (SEC) for this offering and encourages investors to read it (including the accompanying prospectus, the Preliminary Prospectus and the information incorporated by reference therein) for more complete information about the Issuer and this offering. You may obtain these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, copies may also be obtained by contacting BofA Securities, Inc. at the following address: NC1-004-03-43, 200 North College Street, 3rd Floor, Charlotte, North Carolina, 28255-0001, Attn: Prospectus Department, or by calling 1-800-294-1322, or by emailing dg.prospectus_requests@baml.com, Goldman Sachs & Co. LLC at the following address: 200 West Street, New York, New York 10282, Attn: Prospectus Department, or by calling 1-866-471-2526; or J.P. Morgan Securities LLC at the following address: J.P. Morgan Securities LLC, 383 Madison Avenue, New York, New York, 10179, Attn: Investment Grade Syndicate Desk, 3rd Floor, or by calling collect 1-212-834-4533.

This pricing term sheet is dated September 19, 2019. The information in this pricing term sheet supplements the preliminary prospectus of the Issuer, dated September 19, 2019 (the “Preliminary Prospectus”), and supersedes the information in the Preliminary Prospectus to the extent it is inconsistent with the information contained therein. This pricing term sheet is otherwise qualified in its entirety by reference to the Preliminary Prospectus. Financial information presented in the Preliminary Prospectus or incorporated by reference therein is deemed to have changed to the extent affected by the changes described herein. This pricing term sheet should be read together with the Preliminary Prospectus, including the documents incorporated by reference therein, before making a decision in connection with an investment in the Notes.

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