| National Railway Labor Conference | Related tax-exempt org | National Repr | VA | 362491193 |
| RR EE's Nat'l Early Rtrmt Major Med Plan | Related tax-exempt org | Employee Welf | VA | 521184357 |
| The Railroad EE's National Dental Plan | Related tax-exempt org | Employee Welf | VA | 521102730 |
| Maint of Way EE's Supp Sick Benefit Plan | Related tax-exempt org | Employee Welf | VA | 521162945 |
| SSBP Covering RR Shop Craft & Signal EEs | Related tax-exempt org | Employee Welf | VA | 521162946 |
| National Carriers' Conference Committee | Related tax-exempt org | Plan sponsor | VA | 521036399 |
| Union Pacific Railroad Company | Related taxable corporation/trust | Contr employer | — | — |
| Alton & Southern Railroad | Related taxable corporation/trust | Contr employer | — | — |
| BELT Railway Company of Chicago | Related taxable corporation/trust | Contr employer | — | — |
| BNSF | Related taxable corporation/trust | Contr employer | — | — |
| Central California Traction Company | Related taxable corporation/trust | Contr employer | — | — |
| Chicago RAIL Link | Related taxable corporation/trust | Contr employer | — | — |
| Conrail | Related taxable corporation/trust | Contr employer | — | — |
| CSX Transportation Corporation | Related taxable corporation/trust | Contr employer | — | — |
| GARY Railway | Related taxable corporation/trust | Contr employer | — | — |
| Illinois Central | Related taxable corporation/trust | Contr employer | — | — |
| Herzog Transit | Related taxable corporation/trust | Contr employer | — | — |
| Kansas City Terminal Railway | Related taxable corporation/trust | Contr employer | — | — |
| Kansas City Southern Railway Company | Related taxable corporation/trust | Contr employer | — | — |
| Longview Switching CO | Related taxable corporation/trust | Contr employer | — | — |
| New Orleans Public BELT Railroad | Related taxable corporation/trust | Contr employer | — | — |
| Northern Indiana Commuter Transportation | Related taxable corporation/trust | Contr employer | — | — |
| Norfolk Southern Corporation | Related taxable corporation/trust | Contr employer | — | — |
| Palmetto Railway | Related taxable corporation/trust | Contr employer | — | — |
| Pittsburg & Shawmut | Related taxable corporation/trust | Contr employer | — | — |