| | | | | | | | |
| Subsidiaries | | State of Organization |
| | |
| Fairview Cranberry, LLC | | Wisconsin |
| Will Logistics, LLC | | Pennsylvania |
| Smart Sand Live Oak LLC | | Delaware |
| Smart Sand Fayette County LLC | | Delaware |
| Smart Sand Hixton LLC | | Delaware |
| Smart Sand Reagan County LLC | | Delaware |
| Smart Sand Tom Green County LLC | | Delaware |
| Smart Sand Oakdale LLC | | Delaware |
| SSI Logistics LLC | | Delaware |
| SSI Permian I, LLC | | Delaware |
| SSI Permian II, LLC | | Delaware |
| Smart Sand Holdings, LLC | | Delaware |
| SSI Bakken I, LLC | | Delaware |
| Quickthree Technology, LLC | | Delaware |
| SSI Marcellus I, LLC | | Delaware |
| Bakken Silo Servicing, LLC | | Delaware |
| SSI Oil and Gas Proppants Holdings, LLC | | Delaware |
| SSI Oil and Gas Proppants, LLC | | Delaware |
| CRS Proppants LLC | | Delaware |
| Northern White Sand LLC | | Delaware |
| Smart Sand Blair, LLC | | Delaware |