| Animal Feed Supplement, Inc. | Wholesale Trade | $983,053 | $990,836 | 86 | $22.1M |  Research |
| Tri State Construction LLC | Construction | $852,400 | $857,304 | 59 | $18.3M | Research |
| Belle Fourche Nursing and Rehab | Health Care and Social Assistance | $708,000 | $716,240 | 83 | $14.1M | Research |
| Scott Peterson Motors INC | Retail Trade | $461,900 | $464,558 | 36 | $9.1M | Research |
| Hauck Electric and Controls INC | Construction | $253,567 | $256,582 | 16 | $5.3M | Research |
| Habeck Trucking, INC | Transportation and Warehousing | $249,300 | $251,697 | 17 | <$5M | Research |
| Black Sheep Group LLC | Manufacturing | $235,500 | $236,999 | 60 | $21.2M | Research |
| Automotive Company INC | Wholesale Trade | $232,600 | $234,391 | 27 | $8.3M | Research |
| Jackson Dental Prof, LLC | Health Care and Social Assistance | $208,500 | $209,710 | 21 | <$5M | Research |
| Carl's Trailer Sales INC | Retail Trade | $184,962 | $186,497 | 13 | <$5M | Research |
| Belle Fourche Veterinary Clinic P.c. | Professional, Scientific, and Technical Services | $183,900 | $184,938 | 14 | <$5M | Research |
| Belle Fourche Livestock Market, LLC | Agriculture, Forestry, Fishing and Hunting | $161,337 | $162,256 | 49 | <$5M | Research |
| E-Z Fabrication & Welding INC | Other Services (except Public Administration) | $156,992 | $157,650 | 23 | <$5M | Research |
| Body & Collision Repair Cener INC | Other Services (except Public Administration) | $150,000 | $151,064 | 12 | <$5M | Research |
| Hersruds of Belle Fourche INC | Retail Trade | $148,700 | $149,614 | 15 | <$5M | Research |
| Nehl Dental, INC | Health Care and Social Assistance | $143,600 | $145,248 | 15 | <$5M | Research |
| Sowers & Son Dirty Laundry LLC | Other Services (except Public Administration) | $134,300 | $135,065 | 35 | $6.7M | Research |
| Sowers & Son Dirty Laundry LLC | Other Services (except Public Administration) | $134,300 | $135,201 | 26 | <$5M | Research |
| E.t. Sports, LLC | Retail Trade | $133,720 | $134,757 | 15 | <$5M | Research |
| High Plains Hospitality LLC | Accommodation and Food Services | $120,750 | $121,256 | 19 | $5.9M | Research |
| Manufacturing Systems INC | Manufacturing | $118,763 | $119,606 | 18 | <$5M | Research |
| Firefly Builders | Construction | $116,645 | $117,882 | 14 | <$5M | Research |
| David Pummel & Associates LLP | Professional, Scientific, and Technical Services | $114,000 | $115,068 | 7 | <$5M | Research |
| Belle Care, LLC | Health Care and Social Assistance | $107,345 | $108,363 | 24 | <$5M | Research |
| Hills Interiors INC | Retail Trade | $105,400 | $106,050 | 11 | <$5M | Research |