| SOCIETY OF PLASTICS ENGINEERS, INCORPORATEDDanbury, CT · Active | Danbury, CT | Corporation | May 5, 1954 | Active |
| OKLAHOMA SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| CAROLINAS SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| CHICAGO SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| CLEVELAND SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| COLUMBIA RIVER SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| CONNECTICUT SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| DETROIT SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| EASTERN NEW ENGLAND SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| GOLDEN GATE SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| AUTOMOTIVE DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| BLOW MOLDING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| COLOR AND APPEARANCE DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| COMPOSITES DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| DECORATING AND COATINGS DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| ENGINEERING PROPERTIES AND STRUCTURE DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| EXTRUSION DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| INJECTION MOLDING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| MEDICAL PLASTICS DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| MOLD TECHNOLOGIES DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| POLYMER ANALYSIS DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| POLYMER MODIFIERS AND ADDITIVES DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| PRODUCT DESIGN AND DEVELOPMENT DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| ROTATIONAL MOLDING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| THERMOFORMING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| THERMOPLASTIC MATERIALS AND FOAMS DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| THERMOSET DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| VINYL PLASTICS DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| AKRON SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| MILWAUKEE SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| NORTHWESTERN PENNSYLVANIA SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| PACIFIC NORTHWEST SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| PALISADES-MIDATLANTIC SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| PHILADELPHIA SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| PIEDMONT COASTAL SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Dissolved | Danbury, CT | Corporation | Jun 27, 2001 | Dissolved |
| PITTSBURGH SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| SOUTHERN SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| SUSQUEHANNA SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| TRI-STATE SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| UPPER MIDWEST SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| VIRGINIA SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Dissolved | Danbury, CT | Corporation | Jun 27, 2001 | Dissolved |
| WESTERN MICHIGAN SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| WESTERN NEW ENGLAND SECTION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jun 27, 2001 | Active |
| RECYCLING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Dissolved | Danbury, CT | Corporation | Aug 8, 2001 | Dissolved |
| FLEXIBLE PACKAGING DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Glastonbury, CT · Active | Glastonbury, CT | Corporation | Jul 13, 2005 | Active |
| BUILDING AND INFRASTRUCTURE DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Sep 1, 2017 | Active |
| BIOPLASTICS AND RENEWABLE TECHNOLOGIES DIVISION OF SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Mar 14, 2018 | Active |
| APPLIED RHEOLOGY DIVISION OF THE SOCIETY OF PLASTICS ENGINEERS, INC.Danbury, CT · Active | Danbury, CT | Corporation | Jul 11, 2018 | Active |