| Killdeer Mountain Manufacturing, Inc. | Manufacturing | $3,785,000 | $3,829,158 | 362 | $94.8M |  Research |
| Dakota Petroleum Services LLC | Transportation and Warehousing | $2,243,700 | $2,270,063 | 115 | $30.7M | Research |
| Dakota Petroleum Services LLC | Transportation and Warehousing | $2,000,000 | $2,021,000 | 211 | $56.3M | Research |
| Killdeer Mountain Manufacturing INC | Manufacturing | $2,000,000 | $2,016,667 | 260 | $68.1M | Research |
| Ah Inc. | Construction | $880,800 | $890,513 | 32 | $10.5M | Research |
| Ah INC | Construction | $880,800 | $891,052 | 30 | $9.9M | Research |
| Western Choice Cooperative | Wholesale Trade | $756,599 | $762,147 | 97 | $25.0M | Research |
| Western Choice Cooperative | Wholesale Trade | $756,599 | $761,370 | 94 | $24.2M | Research |
| Benz Oil Co. INC | Retail Trade | $749,463 | $753,261 | 33 | $7.9M | Research |
| Benz Oil Co., INC | Wholesale Trade | $723,700 | $728,340 | 57 | $14.7M | Research |
| Hill Top Home of Comfort INC | Health Care and Social Assistance | $686,200 | $691,404 | 89 | N/A | Research |
| Twin Falls Oil Service LLC | Transportation and Warehousing | $652,550 | $658,350 | 33 | $8.8M | Research |
| Twin Falls Oil Service LLC | Mining, Quarrying, and Oil and Gas Extraction | $652,500 | $657,031 | 33 | <$5M | Research |
| Ft. Berthold Services LLC | Mining, Quarrying, and Oil and Gas Extraction | $634,105 | $636,853 | 41 | <$5M | Research |
| Ft Berthold Services, LLC | Mining, Quarrying, and Oil and Gas Extraction | $634,100 | $639,437 | 40 | <$5M | Research |
| Frontier Services INC | Mining, Quarrying, and Oil and Gas Extraction | $560,000 | $564,434 | 16 | <$5M | Research |
| Charging Eagle Enterprises LLC | Construction | $519,335 | $523,717 | 34 | $10.5M | Research |
| Charging Eagle Enterprises LLC | Mining, Quarrying, and Oil and Gas Extraction | $519,300 | $523,739 | 34 | <$5M | Research |
| Jd Fencing LLC | Mining, Quarrying, and Oil and Gas Extraction | $334,400 | $336,406 | 23 | <$5M | Research |
| Frontier Service INC | Mining, Quarrying, and Oil and Gas Extraction | $300,000 | $301,841 | 23 | <$5M | Research |
| Jd Fencing LLC | Mining, Quarrying, and Oil and Gas Extraction | $288,100 | $290,333 | 19 | <$5M | Research |
| B O B Enterprises LLC | Mining, Quarrying, and Oil and Gas Extraction | $242,310 | $244,848 | 7 | <$5M | Research |
| Killdeer Mountain Contracting LLC | Construction | $239,125 | $240,972 | 18 | $5.5M | Research |
| Little Knife Disposal LLC | Mining, Quarrying, and Oil and Gas Extraction | $224,700 | $226,448 | 18 | <$5M | Research |
| Little Knife Disposal LLC | Administrative and Support and Waste Management | $224,700 | $226,610 | 18 | <$5M | Research |