Exhibit 99.1 ADVANCED DRAINAGE SYSTEMS ANNOUNCES FOURTH QUARTER AND FISCAL YEAR 2024 RESULTS HILLIARD, Ohio – (May 16, 2024) – Advanced Drainage Systems, Inc. (NYSE: WMS) ("ADS" or the "Company"), a leading provider of innovative water management solutions in the stormwater and onsite septic wastewater industries today announced financial results for the fourth quarter and fiscal year ended March 31, 2024. Fourth Quarter Fiscal 2024 Results Fiscal 2024 Results Scott Barbour, President and Chief Executive Of ...