| Blakely Construction Co., Inc. | Mining, Quarrying, and Oil and Gas Extraction | $4,834,300 | $4,894,997 | 277 | $16.8M |  Research |
| The Sewell Family of Companies, Inc. | Retail Trade | $4,729,057 | $4,783,178 | 411 | $103.6M | Research |
| Permian Tank & Manufacturing, INC | Manufacturing | $4,698,500 | $2,045,286 | 133 | $32.5M | Research |
| Wfi INC | Wholesale Trade | $4,530,184 | $3,883,722 | 207 | $63.4M | Research |
| Viva Well Servicing Company, LP | Mining, Quarrying, and Oil and Gas Extraction | $4,336,200 | $2,643,085 | 245 | $14.9M | Research |
| Jones Bros Dirt & Paving Contractors, Inc. | Construction | $4,309,100 | $4,358,212 | 290 | $89.9M | Research |
| Sivalls, Inc. | Manufacturing | $4,045,200 | $4,091,858 | 214 | $59.8M | Research |
| L&c Safety, Inc. | Professional, Scientific, and Technical Services | $3,635,200 | $3,676,298 | 191 | $19.8M | Research |
| Ranchand Welding & Fabrication Operating Co., LLC | Mining, Quarrying, and Oil and Gas Extraction | $3,394,900 | $3,440,790 | 254 | $15.4M | Research |
| Lone Star Instrumentation & Electric Corporation | Construction | $3,348,400 | $3,391,929 | 172 | $56.6M | Research |
| Knighten Machine & Service, Inc. | Mining, Quarrying, and Oil and Gas Extraction | $3,202,400 | $3,239,850 | 250 | $15.2M | Research |
| American Safety Services, Inc. | Mining, Quarrying, and Oil and Gas Extraction | $3,115,800 | $3,152,151 | 170 | $10.3M | Research |
| Ace Completions LLC | Mining, Quarrying, and Oil and Gas Extraction | $3,002,500 | $2,772,984 | 232 | $14.1M | Research |
| Eagle Completions Usa, Ltd | Mining, Quarrying, and Oil and Gas Extraction | $2,900,300 | $2,935,898 | 203 | $12.3M | Research |
| Ogt, LLC | Construction | $2,698,122 | $2,729,740 | 171 | $53.0M | Research |
| Barron Service Parts Co. | Wholesale Trade | $2,633,200 | $2,664,221 | 244 | $74.7M | Research |
| Interstate Treating, Inc. | Construction | $2,362,973 | $2,395,266 | 147 | $45.6M | Research |
| E & a Welding & Oilfield Service Inc. | Other Services (except Public Administration) | $2,357,322 | $2,160,403 | 141 | $30.3M | Research |
| Mike Mccreery DBA B-Mac Company | Construction | $2,190,980 | $1,601,008 | 148 | $25.4M | Research |
| Black Star Energy Services LLC | Mining, Quarrying, and Oil and Gas Extraction | $2,176,800 | $1,656,229 | 132 | $8.0M | Research |
| R3 Petroleum Contractors, LLC | Wholesale Trade | $2,095,715 | $2,120,631 | 115 | $29.6M | Research |
| Rextac, LLC | Wholesale Trade | $2,014,400 | $2,035,999 | 135 | $34.7M | Research |
| Barron Service Parts Co. | Wholesale Trade | $2,000,000 | $2,013,151 | 251 | $76.9M | Research |
| E & a Welding & Oilfield Service Inc. | Mining, Quarrying, and Oil and Gas Extraction | $2,000,000 | $2,027,500 | 93 | $5.6M | Research |
| Encore Pipe & Construction LLC | Construction | $2,000,000 | $2,018,333 | 128 | $39.7M | Research |