Last updated:
| Corporation | Joined at | |
|---|---|---|
|  | Project Adonis | almost 17 years | 
|  | Umbra Legion | about 17 years | 
|  | Cuban Industries | over 17 years | 
|  | Perkone | over 17 years | 
|  | United Rockhounds Coalition | almost 18 years | 
|  | Rock Hounds industries | almost 18 years | 
|  | School of Applied Knowledge | almost 18 years |