Form 4 Filing for ADVANCED DRAINAGE SYSTEMS, INC.

This filing details a transaction by Thomas J. Waun, Sr., EVP, International of ADVANCED DRAINAGE SYSTEMS, INC. On May 22, 2026, Mr. Waun disposed of 218 shares of common stock, acquired at a price of $133.00 per share, leaving him with 17,590 shares. The disposition was to satisfy tax obligations related to the vesting of restricted stock. Additionally, the filing notes that 89 shares were acquired under the company's Employee Stock Purchase Plan. Mr. Waun also holds 807.4087 shares through the KSOP plan, representing his current allocation.