Arcosa Inc

Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures designed to ensure that it is able to collect and record the information it is required to disclose in the reports it files or submits under the Securities Exchange Act of 1934 (the “Exchange Act”) with the Securities and Exchange Commission (“SEC”), to process, summarize, and disclose this information within the time periods specified in the rules of the SEC, and that such information is accumulated and communicated to management, including our Chief Executive and Chief Financial Officers, in a timely fashion. The Company’s Chief Executive and Chief Financial Officers are responsible for establishing and maintaining these disclosure controls and procedures and evaluating their effectiveness (as defined in Rule 13(a)-15l under the Exchange Act). Based on their evaluation of the Company’s disclosure controls and procedures that took place as of the end of the period covered by this report, the Chief Executive and Chief Financial Officers believe that these disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting

During the period covered by this report, there have been no changes in the Company’s internal control over financial reporting that have materially affected or are reasonably likely to materially affect the Company’s internal control over financial reporting.

As permitted by the SEC Staff interpretive guidance for recently acquired businesses, management's assessment and conclusion on the effectiveness of the Company's disclosure controls and procedures as of September 30, 2024 excludes an assessment of the internal control over financial reporting of the Ameron business acquired in April 2024. Ameron represents approximately 5% of consolidated total assets and 2% of consolidated revenues as of and for the nine months ended September 30, 2024.