Advanced Drainage Systems (NYSE: WMS) EVP reports 1,500-share stock sale

Rhea-AI Filing Summary

Advanced Drainage Systems, Inc. executive reports stock sale

An officer of Advanced Drainage Systems, Inc. (EVP, International) filed a Form 4 reporting a sale of company common stock. On 11/26/2025, the reporting person sold 1,500 shares of common stock at a price of $155 per share. After this transaction, the filer directly owns 13,470 shares of common stock.

The filing also shows indirect ownership of 796.9667 shares of common stock held through a KSOP, described as the current allocation under that plan. The filing is submitted by the executive through an attorney-in-fact, indicating routine compliance with insider reporting obligations.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

WAUN THOMAS J. SR.

(Last) (First) (Middle)

C/O ADVANCED DRAINAGE SYSTEMS, INC.

4640 TRUEMAN BOULEVARD

(Street)

HILLIARD OH 43026

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ADVANCED DRAINAGE SYSTEMS, INC. [ WMS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, International

3. Date of Earliest Transaction (Month/Day/Year)
11/26/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/26/2025		S		1,500	D	$155	13,470	D
Common Stock								796.9667	I	By KSOP(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents current allocation under KSOP.

	/s/ Thomas J. Waun, Sr., by Scott A. Cottrill as attorney-in-fact	12/01/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Advanced Drainage Systems (WMS) disclose in this Form 4?

The filing reports that an officer of Advanced Drainage Systems, Inc. sold 1,500 shares of common stock on 11/26/2025 at a price of $155 per share.

Who is the reporting person in the Advanced Drainage Systems (WMS) Form 4?

The reporting person is an officer of Advanced Drainage Systems, Inc., serving as EVP, International, and is required to report changes in beneficial ownership of company stock.

How many Advanced Drainage Systems (WMS) shares does the insider own after the reported sale?

Following the reported sale, the insider directly owns 13,470 shares of Advanced Drainage Systems common stock and indirectly owns 796.9667 shares through a KSOP.

What does the KSOP reference mean in the Advanced Drainage Systems (WMS) Form 4?

The Form 4 notes that 796.9667 shares are held indirectly "By KSOP," with an explanation that this amount represents current allocation under KSOP, indicating holdings in a company-sponsored plan.

Does the Advanced Drainage Systems (WMS) Form 4 involve derivative securities?

The provided Form 4 excerpt includes a Table II heading for derivative securities, but no specific derivative transactions or holdings are listed in that table.

Is the Advanced Drainage Systems (WMS) Form 4 filed for one or multiple reporting persons?

The document indicates that the Form is filed by one reporting person, not by a group or multiple filers.