| IBT Local Union 677 | Related tax-exempt org | Representation of union members | CT | 060389865 |
| TRI State Joint Fund | Related tax-exempt org | 3rd party administrator for affiliated entities | CT | 060850110 |
| Brunali Construction CO | Related taxable corporation/trust | — | CT | — |
| City of Danbury | Related taxable corporation/trust | — | CT | — |
| DALY & SONS INC | Related taxable corporation/trust | — | CT | — |
| The Drawn Metal TUBE Company | Related taxable corporation/trust | — | NY | — |
| A Fiorillo & Comapny | Related taxable corporation/trust | — | CT | — |
| Town of New Milford | Related taxable corporation/trust | — | CT | — |
| New PENN Motor Express | Related taxable corporation/trust | — | PA | — |
| Northeast Trans CO | Related taxable corporation/trust | — | CT | — |
| O&G Industries INC | Related taxable corporation/trust | — | CT | — |
| Pomperaug Regional School 15 | Related taxable corporation/trust | — | CT | — |
| YRC INC | Related taxable corporation/trust | — | KS | — |
| United Parcel Service | Related taxable corporation/trust | — | OH | — |
| Suzio Construction CO | Related taxable corporation/trust | — | CT | — |
| Town of Middlebury | Related taxable corporation/trust | — | CT | — |
| Town of Oxford | Related taxable corporation/trust | — | CT | — |
| WACO Scaffolding CO INC | Related taxable corporation/trust | — | CT | — |
| YORK TRAP Rock Quarry CO | Related taxable corporation/trust | — | CT | — |
| J Iapaluccio INC | Related taxable corporation/trust | — | CT | — |
| The Quaker Corporation | Related taxable corporation/trust | — | CT | — |
| Coreslab Structures INC | Related taxable corporation/trust | — | CT | — |
| Veolia Water Seymour | Related taxable corporation/trust | — | CT | — |
| Veolia Water Danbury | Related taxable corporation/trust | — | CT | — |
| Town of Roxbury | Related taxable corporation/trust | — | CT | — |