Name
 | URL | Country
| Market Cap (US$)
|
|---|
| Strongwell Corporation | http://www.strongwell.com | United States | Private |
| Summa Industries Inc. | http://www.summaindustries.com | United States | Private |
| Suncast Corporation | http://www.suncast.com/ | United States | Private |
| Sur-Flo Plastics & Engineering, Inc. | http://www.sur-flo.com | United States | Private |
| Suryodaya Plastics Ltd | NA | India | Public |
| Synseal Extrusions Limited | http://www.synseal.com | United Kingdom | Private |
| TCP Reliable Inc | http://www.tcpreliable.com | United States | Public |
| Technimark, Inc. | http://www.technimark.com | United States | Private |
| TFH Publications, Inc. | http://www.tfh.com | United States | Private |
| The Alpha Corporation of Tennessee | NA | United States | Private |
| The INTEC Group, Inc. | http://www.intecgrp.com/ | United States | Private |
| The Plastic Lumber Company, Inc. | http://www.plasticlumber.com/ | United States | Private |
| The Step2 Company | http://www.step2.com/ | United States | Private |
| Tinnerman Palnut Engineered Products, Inc. | http://www.tinnermanpalnut.com | United States | Private |
| Toledo Molding & Die, Inc. | http://www.tmdinc.com | United States | Private |
| Total Plastics, Inc. | http://www.totalplastics.com | United States | Private |
| Trim-Lok, Inc. | http://www.trimlok.com/ | United States | Private |
| Uniek, Inc. | http://www.uniekinc.com | United States | Private |
| UPG | http://www.unitedplasticsgroup.com/ | United States | Private |
| US Plastic Lumber Corporation | http://www.trimaxbp.com/ | United States | Private |
|
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