Form 4 Filing for ADVANCED DRAINAGE SYSTEMS, INC.

This filing details stock transactions by KEVIN C. TALLEY, EVP and CAO of ADVANCED DRAINAGE SYSTEMS, INC. On May 19, 2026, 141 shares of Common Stock were disposed of at $131.59 per share, reducing his holdings to 56,798. On May 20, 2026, another 141 shares were disposed of at $136.83 per share, with holdings decreasing to 56,657. Additionally, on May 20, 2026, 5,903 shares were acquired at no cost, increasing his holdings to 62,560. These acquisitions are related to performance-based units and dividend equivalents. The filing also notes 21,644.3045 shares are held indirectly through the KSOP plan. Footnote F1 indicates shares were withheld for tax obligations, F2 notes shares acquired through an employee stock purchase plan, F3 details performance-based units and dividend equivalents, and F4 clarifies the KSOP allocation.