| Subsidiaries | State of Organization | |||||||
| Odyssey Pipeline L.L.C. | Delaware | |||||||
| Pecten Midstream LLC | Delaware | |||||||
| Shell Midstream Operating LLC | Delaware | |||||||
| Sand Dollar Pipeline LLC | Delaware | |||||||
| Triton West LLC | Delaware | |||||||
| Zydeco Pipeline Company LLC | Delaware | |||||||
| Joint Ventures | State of Organization | Percentage of Ownership Interest | ||||||||||||
| Amberjack Pipeline Company LLC - Series A/Series B | Delaware | 75.0%/50.0% | ||||||||||||
| Mars Oil Pipeline Company LLC | Texas | 71.5% | ||||||||||||