| Eagle Specialty Materials LLC | Mining, Quarrying, and Oil and Gas Extraction | $10,000,000 | $10,112,877 | 250 | $15.2M |  Research |
| Cyclone Drilling, Inc. | Mining, Quarrying, and Oil and Gas Extraction | $6,887,800 | $2,495,031 | 364 | $22.1M | Research |
| L & H Industrial Inc. | Manufacturing | $5,338,100 | $5,400,695 | 260 | $68.1M | Research |
| Pathfinder Inspections and Field Services, LLC | Mining, Quarrying, and Oil and Gas Extraction | $2,101,500 | $2,125,739 | 153 | $9.3M | Research |
| L & H Industrial INC | Manufacturing | $2,000,000 | $2,011,233 | 225 | $58.9M | Research |
| Dakota Redi-Mix, Inc. | Construction | $1,852,315 | $1,872,124 | 111 | $34.4M | Research |
| Pathfinder Inspections and Field Services LLC | Mining, Quarrying, and Oil and Gas Extraction | $1,817,500 | $1,832,488 | 110 | $6.7M | Research |
| S&s Builders, LLC | Construction | $1,725,300 | $1,736,754 | 128 | $39.7M | Research |
| Powder River Heating and Air Conditioning INC | Construction | $1,639,630 | $1,651,894 | 102 | $32.3M | Research |
| Big Horn Tire INC | Retail Trade | $1,604,800 | $1,620,936 | 100 | $27.0M | Research |
| Visionary Communications, Inc. | Information | $1,365,800 | $1,374,678 | 99 | $16.6M | Research |
| Melgaard Constructio | Construction | $1,343,569 | $1,354,612 | 61 | $22.9M | Research |
| Melgaard Construction Company, Inc. | Construction | $1,294,210 | $1,303,123 | 61 | $22.9M | Research |
| Ps Services LLC | Construction | $1,157,400 | $1,167,737 | 56 | $17.4M | Research |
| Tisdale Creek Ranch, Inc. | Mining, Quarrying, and Oil and Gas Extraction | $1,152,300 | $1,164,896 | 50 | <$5M | Research |
| Tisdale Creek Ranch | Transportation and Warehousing | $1,141,668 | $1,152,615 | 50 | $7.6M | Research |
| Precision Well Service, Inc. | Mining, Quarrying, and Oil and Gas Extraction | $1,047,500 | $1,061,189 | 51 | <$5M | Research |
| Precision Well Service Inc. | Mining, Quarrying, and Oil and Gas Extraction | $1,042,219 | $1,050,383 | 79 | <$5M | Research |
| M&k Oil Company LLC | Mining, Quarrying, and Oil and Gas Extraction | $1,026,910 | $1,032,815 | 62 | <$5M | Research |
| Earth Work Solutions | Construction | $1,017,793 | $1,024,931 | 51 | $19.1M | Research |
| Black Rock Mine Service LLC | Other Services (except Public Administration) | $1,001,593 | $1,009,160 | 50 | $10.7M | Research |
| Earth Work Solutions (wy) | Construction | $992,900 | $1,003,618 | 61 | $18.9M | Research |
| Gregory Dougherty | Other Services (except Public Administration) | $920,975 | $928,368 | 45 | $9.7M | Research |
| Black Rock Mine Service, LLC | Other Services (except Public Administration) | $908,075 | $916,879 | 96 | $20.6M | Research |
| Walker Inspection Ll | Mining, Quarrying, and Oil and Gas Extraction | $905,620 | $912,865 | 41 | <$5M | Research |