ADVANCED DRAINAGE SYSTEMS (WMS) insider reports 112-share tax withholding event

Rhea-AI Filing Summary

ADVANCED DRAINAGE SYSTEMS, INC. officer reports routine tax withholding related to equity vesting. On May 22, 2026, 112 shares of common stock were disposed of at $133.00 per share to satisfy tax obligations arising from the vesting of restricted common stock. This was a share withholding by the issuer, not an open-market sale, and is classified as a tax-withholding disposition.

After this event, the reporting person held 8,813.0000 common shares directly and 4,310.9080 shares indirectly through a KSOP allocation. No open‑market purchases or sales were reported in this filing.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Coyle Patrick M. Jr

Role See Remarks

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	112	$133.00	$15K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,813 shares (Direct, null); Common Stock — 4,310.908 shares (Indirect, By KSOP)

Footnotes (1)

1. 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.

Key Figures

Tax-withheld shares: 112 shares Tax-withholding price: $133.00 per share Direct holdings after transaction: 8,813.0000 shares +1 more

4 metrics

Tax-withheld shares 112 shares Common stock withheld to satisfy tax obligations on vesting

Tax-withholding price $133.00 per share Value assigned to 112 withheld shares

Direct holdings after transaction 8,813.0000 shares Common stock directly owned after tax-withholding disposition

Indirect KSOP holdings 4,310.9080 shares Current KSOP allocation reported as indirect ownership

Key Terms

restricted common stock, tax obligations, KSOP, tax-withholding disposition

4 terms

restricted common stock financial

"vesting of shares of restricted common stock of the Issuer"

Restricted common stock is company shares that carry limits on selling or transferring for a set period or until certain conditions are met, like time-based vesting or regulatory clearance. Think of them as shares in a locked box that gradually open; they can become freely tradable later but initially reduce the number of shares available on the market. Investors watch restricted stock because its eventual release can change a company’s share supply, affect stock price, and influence control and dilution.

tax obligations financial

"shares withheld to satisfy Reporting Person's tax obligations"

KSOP financial

"Represents current allocation under KSOP."

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Coyle Patrick M. Jr

(Last) (First) (Middle)

C/O ADVANCED DRAINAGE SYSTEMS, INC.

4024 GREEN STRIPE LANE

(Street)

HILLIARD OHIO 43026

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/22/2026

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

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

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

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	05/22/2026		F		112(1)	D	$133	8,813	D
Common Stock								4,310.908	I	By KSOP(2)

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 shares withheld to satisfy Reporting Person's tax obligations in connection with the vesting of shares of restricted common stock of the Issuer.

2. Represents current allocation under KSOP.

Remarks:

Executive Vice President, Supply Chain Management

	/s/ Patrick M. Coyle, Jr., by Scott A. Cottrill as attorney-in-fact	05/27/2026
	** 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.
* Form 4: SEC 1474 (03-26)