ADVANCED DRAINAGE SYSTEMS, INC. — M&A Activity 2026

Feb 2, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 2, 2026

ADVANCED DRAINAGE SYSTEMS, INC.

(Exact name of Registrant as Specified in Its Charter)

Delaware		51-0105665
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)
4024 Green Stripe Lane		43026
Hilliard,	Ohio
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s Telephone Number, Including Area Code: ( 800 ) 733-7473

4640 Trueman Boulevard ,

Hilliard , Ohio 43026

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 par value per share	WMS	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.01 Completion of Acquisition or Disposition of Assets

On February 2, 2026, Advanced Drainage Systems, Inc. (the “Company”) completed its previously announced acquisition of the outstanding capital stock of certain indirect subsidiaries of NORMA Group SE (“Norma Group”), a European company ( Societas Europaea ) incorporated under the laws of Germany, which comprise substantially all of Norma Group’s water management business known as National Diversified Sales (“NDS”), subject to the terms and conditions set forth in the Master Share Purchase Agreement dated September 23, 2025 (the “Purchase Agreement”) between the Company and Norma Group. The acquisition was an all cash transaction for consideration of approximately $1.0 billion, subject to certain purchase price adjustments.

The foregoing description of the Purchase Agreement does not purport to be complete, and is qualified in its entirety by reference to the full text of the Purchase Agreement, a copy of which was filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on September 23, 2025.

Item 7.01 Regulation FD Disclosure

On February 2, 2026, the Company issued a press release announcing the completion of the acquisition of NDS, as described in Item 2.01. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and hereby incorporated by reference.

The information furnished pursuant to this Item 7.01, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities under Section 18 of the Exchange Act and shall not be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933 or the Exchange Act.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are being furnished as part of this report:

99.1	Press Release of Advanced Drainage Systems, Inc. dated February 2, 2026
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

ADVANCED DRAINAGE SYSTEMS, INC. — By:	/s/ Scott A. Cottrill
Name:	Scott A. Cottrill
Title:	EVP, CFO & Secretary