Advanced Drainage Systems (WMS) 10-K2022 FY Annual report

Filed: 19 May 22, 4:13pm

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Exhibit 21.1

LIST OF SUBSIDIARIES

The following entities were subsidiaries of the Registrant as of March 31, 2022. Pursuant to Item 601(b)(21)(ii) of Regulation S-K, certain subsidiaries of the Registrant which, considered in the aggregate as a single subsidiary, would not have constituted a significant subsidiary (as defined in Rule 1-02(w) of Regulation S-X) have been omitted.


Name						Jurisdiction of Incorporation or Organization
ADS Ventures, Inc.						Delaware
StormTech LLC						Delaware
ADS Worldwide, Inc.						Delaware
ADS Europe Holding B.V.						Netherlands
ADS Europe B.V.						Netherlands
ADS Middle East FZE						United Arab Emirates
ADS International, Inc.						Delaware
ADS Mexicana, S.A. de C.V.(1)						Mexico
ADSM Centro América, S.A.						Costa Rica
CEDEIM Centro de Desarrollo, Educación e Investigación de México, S.A. de C.V.						Mexico
Hancor of Canada, Inc.						Canada
Tubos y Plásticos ADS Chile Limitada(2)						Chile
Tuberias Tigre-ADS Limitada(3)						Chile
Tigre-ADS Argentina S.R.L.(4)						Argentina
Tigre-ADS Colombia Limitada(4)						Colombia
Tigre-ADS Peru S.A.C.(4)						Peru
Tubos Tigre-ADS do Brasil Limitada(4)						Brazil
Tubos y Plásticos Tigre-ADS de Chile Limitada(4)						Chile
Green Line Polymers, Inc.						Delaware
The Traylor Group, Inc.						Alabama
JET Polymer Recycling, Inc.						Alabama
Infiltrator Water Technologies Ultimate Holdings, Inc.						Delaware
Infiltrator Water Technologies Holdings, LLC						Delaware
Infiltrator Water Technologies, LLC						Delaware
Delta Treatment Systems, LLC						Delaware
Ezflow GP, LLC						Delaware
Ezflow, L.P.(5)						Tennessee
ISI Pipe, LLC						Delaware
ISI Polyethylene Solutions, LLC						Delaware
Presby Environmental Holdings, LLC						Delaware
Presby Environmental, Inc.						New Hampshire
Presby Plastics, Inc.						New Hampshire
STI Incorporated						Connecticut
Wastewater Environmental Technologies, LLC						Connecticut
Spartan Concrete, Inc.						Delaware

(1) Owned 51% by ADS Worldwide, Inc. and 49% by our joint venture partner.

(2) Owned 86.6354% by ADS Worldwide, Inc. and 13.3646% by ADS International, Inc.

(3) Owned 50% by Tubos y Plásticos ADS Chile Limitada and the remaining 50% by our joint venture partner.

(4) Nominal interests are held by Tubos y Plásticos ADS Chile Limitada and our joint venture partner.

(5) Owned 99.99% by Infiltrator Water Technologies, LLC and 0.01% by EZflow GP, LLC.

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