X0407 4 2023-05-17 0 0001604028 ADVANCED DRAINAGE SYSTEMS, INC. WMS 0001672236 MAKOWSKI TIM A C/O ADVANCED DRAINAGE SYSTEMS, INC. 4640 TRUEMAN BOULEVARD HILLIARD OH 43026 0 1 0 0 See Remarks 0 Common Stock 2023-05-17 4 A 0 4493 0.00 A 12003 D Common Stock 2023-05-17 4 F 0 1347 88.67 D 10656 D Common Stock 2023-05-17 4 F 0 18 88.67 D 10638 D Common Stock 17540.2828 I By KSOP Reflects grant of performance-based units, originally granted pursuant to the Issuer's 2017 Omnibus Incentive Plan, earned after the Issuer determined that certain performance goals for the performance period ended March 31, 2023 had been met. Total includes dividend equivalents in the amount of 57 shares, which dividend equivalents are settled in common stock. Represents shares withheld to satisfy Reporting Person's tax obligations in connection with the vesting of shares of restricted common stock of the Issuer. Represents current allocation under KSOP. Vice President, Controller and Chief Accounting Officer /s/ Tim A. Makowski, by Kevin C. Talley as attorney-in-fact 2023-05-19