TIM A. MAKOWSKI - 22 May 2025 Form 4 Insider Report for ADVANCED DRAINAGE SYSTEMS, INC. (WMS)

Role: Vice President, Controller and Chief Accounting Officer
Signature: /s/ Tim A. Makowski, by Scott A. Cottrill as attorney-in-fact
Issuer symbol: WMS
Transactions as of: 22 May 2025
Net transactions value: -$14,763
Form type: 4
Filing time: 23 May 2025, 16:23:05 UTC
Previous filing: 21 May 2025
Next filing: 13 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MAKOWSKI TIM A	Vice President, Controller and Chief Accounting Officer	C/O ADVANCED DRAINAGE SYSTEMS, INC., 4640 TRUEMAN BOULEVARD, HILLIARD	/s/ Tim A. Makowski, by Scott A. Cottrill as attorney-in-fact	23 May 2025	0001672236

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WMS	Common Stock	Tax liability	$14,763	-133	-1.8%	$111.00	7,368	22 May 2025	Direct	F1
holding	WMS	Common Stock						17,557	22 May 2025	By KSOP	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents shares withheld to satisfy Reporting Person's tax obligations in connection with the vesting of shares of restricted common stock of the Issuer.
F2	Represents current allocation under KSOP.

Remarks:

Vice President, Controller and Chief Accounting Officer