| Communication Service for the Deaf OH | Professional & Technical Services | 0 | — | A |
| Communication Service for the Deaf TX | Professional & Technical Services | 0 | — | C |
| Communication Service for the Deaf, Inc. SC | — | 0 | — | — |
| Communication Services for the Deaf (CSD) SD | — | 0 | — | — |
| Communication Services for the Deaf, Inc. SD | — | 0 | — | — |
| Communication Services For The Deaf, Inc. (Csd) CA | — | 0 | — | — |
| Communication Technology Services LLC CA | Construction | 0 | — | F |
| Communication Technology Services LLC FL | Construction | 0 | — | F |
| Communication Technology Services LLC NJ | Construction | 0 | — | F |
| Communication Technology Services, LLC MA | Construction | 2 | $162,500 | C |
| Communication Test Design, Inc. CA | — | 0 | — | — |
| Communications & Power Industries LLC CA | Manufacturing | 0 | — | F |
| Communications & Power Industries, LLC MA | Manufacturing | 0 | — | A |
| Communications and Power Industries LLC CA | Manufacturing | 0 | — | A |
| COMMUNICATIONS CONSTRUCTION GROUP LLC MA | Construction | 0 | — | F |
| COMMUNICATIONS CONSTRUCTION GROUP LLC MD | Construction | 0 | — | A |
| COMMUNICATIONS CONSTRUCTION GROUP LLC NH | Construction | 0 | — | D |
| COMMUNICATIONS CONSTRUCTION GROUP LLC NJ | Construction | 0 | — | A |
| COMMUNICATIONS CONSTRUCTION GROUP LLC PA | Construction | 0 | — | F |
| Communications Corporation of America, Inc. VA | Professional & Technical Services | 0 | — | A |
| Communications Electronics MD | Other Services | 0 | — | F |
| Communications Electronics VA | Other Services | 0 | — | A |
| Communications Engineering Company IA | Construction | 0 | — | C |
| Communications Engineering Company WI | Construction | 0 | — | A |
| Communications Infrastructure Services, LLC PA | Construction | 0 | — | A |
| Communications Test Design, Inc TN | — | 0 | — | — |
| Communications Test Design, Inc. CA | — | 0 | — | — |
| Communications Test Design, Inc. PA | Other Services | 11 | $113,975 | — |
| Communications Test Design, Inc. (CTDI) CA | — | 0 | — | — |
| CommUnify - Adam Center CA | — | 0 | — | — |
| CommUnify - Alvin Center CA | — | 0 | — | — |
| CommUnify - Betty Sanchez Center CA | — | 0 | — | — |
| CommUnify - Chapel Office CA | — | 0 | — | — |
| CommUnify - Chestnut Office CA | — | 0 | — | — |
| CommUnify - Coronel Center CA | — | 0 | — | — |
| CommUnify - Cuyama Center CA | — | 0 | — | — |
| CommUnify - Filmore Center CA | — | 0 | — | — |
| CommUnify - Goleta Center CA | — | 0 | — | — |
| CommUnify - I Center CA | — | 0 | — | — |
| CommUnify - Jardin de Suenos CA | — | 0 | — | — |
| CommUnify - JC Washington Center CA | — | 0 | — | — |
| CommUnify - Little Village Center CA | — | 0 | — | — |
| CommUnify - Los Adobes Center CA | — | 0 | — | — |
| CommUnify - Los Padres Center CA | — | 0 | — | — |
| CommUnify - Maggie Espinoza Center CA | — | 0 | — | — |
| CommUnify - Maple Center CA | — | 0 | — | — |
| CommUnify - Meridian Center CA | — | 0 | — | — |
| CommUnify - Oak Valley Center CA | — | 0 | — | — |
| CommUnify - Sierra Madre Center CA | — | 0 | — | — |
| CommUnify - South County HS Office CA | — | 0 | — | — |
