| Relationships | Role | Relationship Start | Relationship End |
| Nexus Llc | Parent | 9/21/2008 | 3/15/2012 |
| Hydrogen Holdings Corporation | Subsidary | 9/21/2008 | 3/15/2012 |
| Tradeweb Markets International Llc | Subsidary | 9/21/2008 | 3/15/2012 |
| Tradeweb Global Holding Llc | Subsidary | 10/26/2010 | 3/15/2012 |