Allegion plc

Form 10-K

For the Fiscal Year Ended December 31, 2025

TABLE OF CONTENTS

CAUTIONARY STATEMENT FOR FORWARD LOOKING STATEMENTS

Certain statements in this report, other than purely historical information, are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements generally are identified by the words "believe," "aim," "projected," "expect," "anticipate," "estimate," "forecast," "outlook," "intend," "scheduled," "targets," "strategy," "future," "opportunity," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," or the negative thereof or variations thereon or similar expressions generally intended to identify forward-looking statements.

These statements are based on currently available information and our current assumptions, expectations and projections about future events. While we believe that our assumptions, expectations and projections are reasonable in view of the currently available information, you are cautioned not to place undue reliance on our forward-looking statements. Forward-looking statements speak only as of the date they are made and are not guarantees of future performance. They are subject to future events, risks and uncertainties – many of which are beyond our control – as well as potentially inaccurate assumptions, that could cause actual results to differ materially from our expectations and projections including, among other things:

•global macroeconomic factors;

•increased prices and inflationary pressures;

•volatility and uncertainty in the political, economic and regulatory environments in which we operate, including new or increased tariffs, changes to trade agreements, sanctions, import and export regulations, custom duties and applicable tax regulations and interpretations, social and political unrest, instability, national and international conflict, terrorist acts and other geographical disputes and uncertainties;

•the strength and stability of the institutional, commercial and residential construction and remodeling markets;

•fluctuations in currency exchange rates;

•potential impairment of our goodwill, indefinite-lived intangible assets and/or our long-lived assets;

•instability in the U.S. and global capital and credit markets;

•our ability to make scheduled debt payments or to refinance our debt obligations;

•increased competition, including from technological developments;

•the development, commercialization and acceptance of new products and services;

•changes in customer and consumer preferences and our ability to maintain beneficial relationships with large customers;

•our products or solutions failing to meet certification and specification requirements, being defective, causing property damage, bodily harm or injury, or otherwise falling short of customers’ needs and expectations;

•our ability to identify and successfully complete and integrate acquisitions, including achieving their anticipated strategic and financial benefits;

•business opportunities that diverge from our core business;

•our ability to achieve the expected improvements or financial returns we expect from our strategic initiatives;

•our ability to effectively manage and implement restructuring initiatives or other organizational changes;

•global climate change or other unexpected events, including global health crises;

•the proper functioning of our information technology and operational technology systems, including disruption or breaches of our information systems, such as cybersecurity attacks;

•the failure of our third-party vendors to provide effective support for many of the critical elements of our global information and operational technology infrastructure;

•our ability to recruit and retain a highly qualified and diverse workforce;

•disruptions in our global supply chain, including product manufacturing and logistical services provided by our supplier partners;

•our ability to effectively manage real or perceived issues related to product quality, safety, corporate social responsibility and other reputational matters;

•our ability to protect our brand reputation and trademarks;

•legal judgments, fines, penalties or settlements imposed against us or our assets as a result of legal proceedings, claims and disputes;

•claims of infringement of intellectual property rights by third parties;

•improper conduct by any of our employees, agents or business partners;

•changes to, or changes in interpretations of, current laws and regulations;

•uncertainty and inherent subjectivity related to transfer pricing regulations in the countries in which we operate;

•changes in tax rates, the adoption of new tax legislation or exposure to additional tax liabilities; and

•risks related to our incorporation in Ireland, including the possible effects on us of future legislation or adverse determinations by taxing authorities that could increase our tax burden.

These events, risks and uncertainties are further described in Item 1A. "Risk Factors" and Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operations" of this report. We do not undertake to update any forward-looking statements, except as required by law.

PART I