| Electrical Workers Pension Plan Local 103 IBEW | Related tax-exempt org | Benefit plan | MA | 046063734 |
| Electrical Workers Deferred Income Fund Local 103 IBEW | Related tax-exempt org | Benefit plan | MA | 042471895 |
| Electrical Industry Labor Management Cooperation Trust | Related tax-exempt org | Labor organization | MA | 043398237 |
| Local 103 IBEW General Fund | Related tax-exempt org | Labor union | MA | 041472080 |
| Joint Apprenticeship and Training Trust Fund Local 103 IBEW | Related tax-exempt org | Training fund | MA | 510201858 |
| ALL-RON | Related taxable corporation/trust | — | MA | — |
| D REED Electric | Related taxable corporation/trust | — | MA | — |
| Eastman Corp DBA Homelight Boston | Related taxable corporation/trust | — | MA | — |
| Arden Engineering Constructors | Related taxable corporation/trust | — | RI | — |
| KB-MAC INC | Related taxable corporation/trust | — | MA | — |
| EH Electric & HVAC LLC | Related taxable corporation/trust | — | MA | — |
| Ultra AV LLC | Related taxable corporation/trust | — | NH | — |
| AI Solutions INC | Related taxable corporation/trust | — | PA | — |
| American ELEC Testing Company | Related taxable corporation/trust | — | MA | — |
| Timothy Burgess Electrical LLC | Related taxable corporation/trust | — | MA | — |
| Roper Electrical Corporation | Related taxable corporation/trust | — | MA | — |
| Newkirk Electric Associates INC | Related taxable corporation/trust | — | MI | — |
| E W Audet & SONS INC | Related taxable corporation/trust | — | RI | — |
| Atlantic Power & Light CO | Related taxable corporation/trust | — | MA | — |
| Aspire Electric | Related taxable corporation/trust | — | MA | — |
| Kelso Burnett CO | Related taxable corporation/trust | — | IL | — |
| Averill Electric | Related taxable corporation/trust | — | MA | — |
| Back Up Systems | Related taxable corporation/trust | — | MA | — |
| BAY State Lightning Protection CO | Related taxable corporation/trust | — | MA | — |
| Solutions Electric INC | Related taxable corporation/trust | — | MA | — |