| | | | | | | | |
| Entity Name | | Jurisdiction of Incorporation |
| AFC Cable Systems, Inc. | | Delaware |
| Allied Luxembourg S.a.r.l. | | Luxembourg |
| Allied Products UK Limited | | United Kingdom |
| Allied Tube & Conduit Corporation | | Delaware |
| Allied Switzerland GmbH | | Switzerland |
| Atkore Construction Technologies NZ Limited | | New Zealand |
| Atkore Foreign Holdings, Inc. | | Delaware |
| Atkore HDPE, LLC | | Delaware |
| Atkore Holdings IX (Denmark) ApS | | Denmark |
| Atkore International, Inc. | | Delaware |
| Atkore Management, LLC | | Delaware |
| Atkore Metal Products (Changshu Co., Ltd.) | | China |
| Atkore Metal Products Pte Limited | | Singapore |
| Atkore Plastic Pipe Corporation | | Delaware |
| Atkore Plastics Southeast, LLC | | Delaware |
| Atkore Southwest, LLC | | Delaware |
| Calpipe Industries, LLC | | California |
| Columbia-MBF Inc. | | Canada |
| FlexHead Industries, Inc. | | Massachusetts |
| Flexicon Australia Pty Limited | | Australia |
| Flexicon Limited | | United Kingdom |
| Flytex Systems Limited | | United Kingdom |
| FRE Composites, Inc. | | Canada |
| Kalanda Enterprises Pty Limited | | Australia |
| Marco Cable Management Limited | | United Kingdom |
| Modern Associates Limited | | United Kingdom |
| Northwest Polymers, LLC | | Oregon |
| Sasco Tubes & Roll Forming Inc. | | Canada |
| Standard Industries Co. Limited | | Hong Kong |
| Swan Metal Skirting Pty Limited | | Australia |
| Tekflex Limited | | United Kingdom - Dormant |
| TKN, Inc. | | Rhode Island |
| Unistrut (New Zealand) Holdings Pty Limited | | Australia |
| Unistrut Australia Pty Limited | | Australia |
| Unistrut Cable Management and Protection Systems | | Israel |
| Unistrut International Corporation | | Nevada |
| Unistrut Limited | | United Kingdom |
| United Poly Systems Holdings, Inc. | | Delaware |
| United Poly Systems, LLC | | Missouri |
| Vergo Coating BVBA | | Belgium |
| Vergo Galva NV | | Belgium |
| Vergokan International NV | | Belgium |
| Vergokan NV | | Belgium |
| Vergokan OOO | | Russia |
| Vergokan SAS | | France |
| Western Poly Pipe & Conduit, LLC | | Oregon |