ABM INDUSTRIES INC /DE/

a. Disclosure Controls and Procedures.

As of the end of the period covered by this report, our Principal Executive Officer and Principal Financial Officer evaluated our disclosure controls and procedures, as such term is defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act. Based upon that evaluation, our Principal Executive Officer and Principal Financial Officer concluded that as of the end of the period covered by this report, our disclosure controls and procedures were effective to ensure that information required to be disclosed by us in reports we file or submit under the Exchange Act is (1) recorded, processed, summarized, and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission and (2) accumulated and communicated to our management, including our Principal Executive Officer and Principal Financial Officer, to allow timely decisions regarding required disclosure.

b. Management’s Report on Internal Control Over Financial Reporting.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act. Under the supervision and with the participation of our management, including our Principal Executive Officer and Principal Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based upon the framework in Internal Control – Integrated Framework (2013), issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on that evaluation, our management concluded that our internal control over financial reporting was effective as of October 31, 2025.

Audit Report on Internal Controls Over Financial Reporting of the Registered Public Accounting Firm

KPMG LLP, an independent registered public accounting firm, has audited the consolidated financial statements included in this Annual Report on Form 10-K and, as part of its audit, has issued its report, included herein, on the effectiveness of our internal control over financial reporting.

c. Changes in Internal Control Over Financial Reporting.

To support the growth of our financial shared service capabilities and standardize our financial systems, we continue to update several key platforms, including our HR information systems, enterprise resource planning system, and labor management system. The implementation of several key platforms involves changes in the systems that include internal controls. During the third quarter of 2023 and first quarter of 2025, we had a change in our internal control over financial reporting as a result of our implementation of a new ERP system and key boundary systems for the Education, B&I, and M&D industry groups that has materially affected our internal control over financial reporting. The new ERP system and key boundary systems for these industry groups is replacing our legacy system in which a significant portion of our business transactions originate, are processed, and recorded. The rest of our industry groups will transition to our new ERP system and key boundary systems over the next several years. Our new ERP system and key boundary systems are intended to provide us with enhanced transactional processing and management tools, as compared with our legacy system, and is intended to enhance internal controls over financial reporting. We believe our new ERP system and key boundary systems will facilitate better transactional reporting and oversight, enhance our internal control over financial reporting, and function as an important component of our disclosure controls and procedures. Although some of the transitions have proceeded to date without material adverse effects, the possibility exists that they could adversely affect our internal controls over financial reporting and procedures.

There were no other changes in our internal control over financial reporting during the fiscal year 2025 identified in connection with the evaluation required by Rules 13a-15(d) and 15d-15(d) of the Exchange Act that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.