X0508 4 2023-08-09 0 0001604028 ADVANCED DRAINAGE SYSTEMS, INC. WMS 0001614367 KLEIN ROBERT M C/O ADVANCED DRAINAGE SYSTEMS, INC. 4640 TRUEMAN BOULEVARD HILLIARD OH 43026 0 1 0 0 EVP, Sales 0 Common Stock 2023-08-09 4 M 0 4297 27.44 A 111990 D Common Stock 2023-08-09 4 M 0 5508 41.97 A 117498 D Common Stock 2023-08-09 4 M 0 1718 105.82 A 119216 D Common Stock 2023-08-09 4 M 0 1031 99.29 A 120247 D Common Stock 2023-08-09 4 S 0 8275 130.0881 D 111972 D Common Stock 2023-08-09 4 M 0 2881 15.74 A 114853 D Option to Purchase Common Stock 27.44 2023-08-09 4 M 0 4297 0.00 D 2029-05-21 Common Stock 4297 0 D Option to Purchase Common Stock 41.97 2023-08-09 4 M 0 5508 0.00 D 2030-05-19 Common Stock 5508 0 D Option to Purchase Common Stock 105.82 2023-08-09 4 M 0 1718 0.00 D 2031-05-18 Common Stock 1718 859 D Option to Purchase Common Stock 99.29 2023-08-09 4 M 0 1031 0.00 D 2032-05-17 Common Stock 1031 2062 D Reflects the exercise by the Reporting Person of stock options (right to buy) previously granted by the Issuer. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $129.52 to $131.00, inclusive. The reporting person undertakes to provide to Advanced Drainage Systems, Inc., any security holder of Advanced Drainage Systems, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) to this Form 4. The options vest in three equal installments beginning on May 21, 2020. The options vest in three equal installments beginning on May 19, 2021. The options vest in three equal installments beginning on May 18, 2022. The options vest in three equal installments beginning on May 17, 2023. /s/ Robert M. Klein, by Scott A. Cottrill as attorney-in-fact 2023-08-11