| | |
| Name of Subsidiary |
| 5 Star Electric LLC |
| Anaconda Manufacturing LLC |
| Aquawolf LLC |
| Bison Drilling and Field Services LLC |
| Bison Trucking LLC |
| Black Mamba Energy LLC |
| Cobra Acquisitions LLC |
| Cobra Aviation Services LLC |
| Lion Power Services LLC |
| Dire Wolf Energy Services LLC |
| Great White Sand Tiger Lodging Ltd. |
| Higher Power Electrical LLC |
| Leopard Aviation LLC |
| Mako Acquisitions LLC |
| Mammoth Energy Partners LLC |
| Mammoth Equipment Leasing LLC |
| Mr. Inspections LLC |
| Muskie Proppant LLC |
| Orca Energy Services LLC |
| Panther Drilling Systems LLC |
| Piranha Proppant LLC |
| Predator Aviation LLC |
| Python Equipment LLC |
| Silverback Energy LLC |
| South River Road LLC |
| Stingray Cementing and Acidizing LLC |
| Stingray Energy Services LLC |
| Stingray Pressure Pumping LLC |
| Sturgeon Acquisitions LLC |
| Taylor Frac LLC |
| Taylor Real Estate Investments LLC |
| Tiger Shark Logistics LLC |