| 1 | Tico Irrigation LLC | | USA |
| 2 | Charter Plastics | | USA |
| 3 | CertainTeed Corporation | | USA |
| 4 | Advanced Drainage Systems Inc. | | USA |
| 5 | American Spiralweld Pipe Co. LLC | | USA |
| 6 | Jindal Saw Limited | | USA |
| 7 | ISCO Industries LLC | | USA |
| 8 | Pacific Plastics Inc. | | USA |
| 9 | Drossbach LLC | | USA |
| 10 | L.B. Foster Co. | | USA |
| 11 | Alcoa | | USA |
| 12 | Oil Creek Plastics Inc. | | USA |
| 13 | Fiskars Garden Tools Inc. | | USA |
| 14 | Midwest Irrigation Co. | | USA |
| 15 | NewAge Industries Inc. | | USA |
| 16 | Naylor Pipe Co. | | USA |
| 17 | Chicago Metal Rolled Products Co. | | USA |
| 18 | Contech Engineered Solutions LLC | | USA |
| 19 | Westlake Pipe & Fittings | | USA |
| 20 | Aquatherm | | USA |
| 21 | Morrill Industries Inc | | USA |
| 22 | Diamond Plastics Corp. | | USA |
| 23 | Tmax | | USA |
| 24 | Storms Welding & Mfg Inc. | | USA |
| 25 | Kroy Industries Inc. | | USA |
| 26 | Steel Forgings Inc. | | USA |
| 27 | Piping Systems Inc. | | USA |
| 28 | Pena-Plas Co. | | USA |
| 29 | United Pipe Nipple Company | | USA |
| 30 | AK Tube LLC | | USA |
| 31 | Hobas Pipe USA | | USA |
| 32 | Pipeline Plastics | | USA |
| 33 | Charlotte Pipe & Foundry Co. | | USA |
| 34 | Town & Country Plastics Inc. | | USA |
| 35 | J & D Tube Benders Inc. | | USA |
| 36 | Industrial Plastic Products Inc. | | USA |
| 37 | JM Eagle | | USA |
| 38 | Arconic Fastening Systems | | USA |
| 39 | Oxford Plastics Inc. | | USA |
