 | Wheeler Clinic | Plainville, connecticut, united states | 600 | hospital and health care | 1968 | |
 | gems sensors | plainville, connecticut, united states | 256 | automation machinery manufacturing | - | |
 | Network Framing Solutions, LLC | Plainville, connecticut, united states | 4 | construction | 2018 | |
 | Siyami Apps, LLC | Plainville, connecticut, united states | 1 | information technology and services | 2012 | |
 | Hygrade Precision Technologies, LLC | Plainville, connecticut, united states | 19 | aviation and aerospace | 1962 | |
 | Innovative Autism Services | plainville, connecticut, united states | 10 | medical practices | 2009 | |
 | Ellora Management Inc. | Plainville, connecticut, united states | 4 | music | 1982 | |
 | Plainville Day Care Center | Plainville, connecticut, united states | 4 | government administration | - | |
 | Palmer Hargrave Lighting LLC | Plainville, connecticut, united states | 1 | design | - | |
 | Winter Associates, Inc. | Plainville, connecticut, united states | - | - | - | |
 | petit family foundation | plainville, connecticut, united states | - | philanthuman resourcesopy | 2007 | |
 | solvit home services | plainville, connecticut, united states | - | consumer services | 2000 | |
| greenhomes america | plainville, connecticut, united states | - | renewables and environment | 2017 | |
| crystal starr photography | plainville, connecticut, united states | - | photography | 2009 | |
| superior electric | plainville, connecticut, united states | - | industrial automation | - | |
| Torific homes | Plainville, connecticut, united states | - | - | - | |
 | progressive specialty glass company, inc. | plainville, connecticut, united states | - | wholesale | 1977 | |
 | king network services inc | plainville, connecticut, united states | - | telecommunications | 2010 | |
| advanced medical resources | plainville, connecticut, united states | - | staffing and recruiting | 1987 | |
 | perfectemp inc. | plainville, connecticut, united states | - | facilities services | 1998 | |
