Exhibit 21.1

Name | Jurisdiction of Formation
AESI Holdings Inc. | Delaware
Atlas Sand Operating, LLC | Delaware
Atlas Sand Company, LLC (d/b/a Atlas Energy Solutions) | Delaware
Atlas Sand Construction, LLC | Texas
Fountainhead Logistics, LLC | Delaware
Fountainhead Transportation Services, LLC | Delaware
Fountainhead Equipment Leasing, LLC | Delaware
OLC Kermit, LLC | Texas
OLC Monahans, LLC | Texas
Atlas Sand Employee Company, LLC | Texas
Hi-Crush Operating, LLC | Delaware
Hi-Crush LMS LLC | Delaware
Hi-Crush Investments LLC | Delaware
OnCore Processing LLC | Delaware
Hi-Crush Permian Sand LLC | Delaware
Hi-Crush PODS LLC | Delaware
NexStage LLC | Texas
FB Logistics LLC | Texas
BulkTracer Holdings LLC | Texas
Pronghorn Logistics Holdings, LLC | Colorado
PropDispatch LLC | Texas
Pronghorn Logistics, LLC | Colorado
Propflow, LLC | Delaware
PropFlow Employee Co., LLC | Texas
PropFlow International, LLC | Arkansas
PropFlow Operating, LLC | Arkansas
Wyatt Holdings, LLC | Delaware
Wyatt Operating, LLC | Delaware
Moser Acquisition Inc. | Delaware
Moser Engine Service Inc. (d/b/a Atlas Energy Solutions) | Delaware
Galt Power Solutions LLC | Texas