{"url_path":"/sec/wms/10-k/2026/item-9a","section_key":"item-9a","section_title":"Item 9A Controls and Procedures","topic":"sec","document":{"doc_type":"10-K","doc_date":"2026-05-21","source_url":"https://www.sec.gov/Archives/edgar/data/1604028/0001604028-26-000019-index.html","accession_number":"0001604028-26-000019","cik":"0001604028","ticker":"WMS","issuer_name":"ADVANCED DRAINAGE SYSTEMS, INC.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1604028/0001604028-26-000019-index.html","primary_entity_key":"0001604028","primary_entity_name":"ADVANCED DRAINAGE SYSTEMS, INC."},"word_count":621,"has_tables":true,"body_markdown":"Item 9A.    Controls and Procedures\n\nEvaluation of Disclosure Controls and Procedures\n\nUnder the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we evaluated the effectiveness of our disclosure controls and procedures as defined in Exchange Act Rules 13a-15(e) and 15d-15(e), as of March 31, 2026. Disclosure controls and procedures are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act are recorded, processed, summarized and reported, within the time periods specified under Securities Exchange Commission (“SEC”) rules and forms. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.\n\nBased on the evaluation of our disclosure controls and procedures, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of March 31, 2026.\n\nManagement’s Report on Internal Control over Financial Reporting\n\nManagement is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Because of its inherent limitations, internal control over financial reporting may not prevent or detect all misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with policies or procedures may deteriorate.\n\nManagement, including our Chief Executive Officer and our Chief Financial Officer, assessed the effectiveness of our internal control over financial reporting as of March 31, 2026. In making this assessment, management used the criteria set\n\n42\n\n[Table of Contents](#ieb5bb33133ed4902a5089ffadf55276a_1)\n\nAdvanced Drainage Systems, Inc\n\nforth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control — Integrated Framework (2013). A material weakness in internal controls is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis. Because of its inherent limitations, even appropriate internal control over financial reporting may not prevent or detect misstatements.\n\nBased on this assessment, management has concluded that the Company’s internal control over financial reporting was effective as of March 31, 2026.\n\nWe have excluded from the scope of our assessment of internal control over financial reporting the operations and related assets of NDS which we acquired on February 2, 2026. This exclusion is in accordance with SEC guidance that an assessment of a recently acquired business's internal control over financial reporting may be omitted from management's report on internal control over financial reporting in the year of acquisition. At March 31, 2026 and for the period from acquisition through March 31, 2026, total assets, total revenues, and net income subject to NDS’ internal control over financial reporting represented 23%, 2%, and (1%) of consolidated total assets, net sales, and net income, respectively of ADS as of and for the year ended March 31, 2026.\n\nDeloitte & Touche LLP, our independent registered public accounting firm, has issued an audit report on the effectiveness of our internal control over financial reporting as of March 31, 2026 and this report is included herein.\n\nChanges in Internal Control over Financial Reporting\n\nThere were no changes in our internal control over financial reporting identified in management’s evaluation pursuant to Rules 13a15(d) or 15d-15(d) of the Exchange Act during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting."}