| Regency Csp Ventures Limited Partnership | Accommodation and Food Services | $987,605 | $993,612 | 131 | $41.0M |  Research |
| Regency Csp Ventures Limited Partnership | Accommodation and Food Services | $705,432 | $710,689 | 131 | $41.0M | Research |
| Custer Hospitality LLC | Accommodation and Food Services | $593,638 | $597,297 | 26 | $8.1M | Research |
| Pacer Minerals LLC | Mining, Quarrying, and Oil and Gas Extraction | $303,927 | $305,846 | 25 | <$5M | Research |
| Custer Hospitality LLC | Accommodation and Food Services | $292,917 | $295,109 | 50 | $15.6M | Research |
| Pacer Minerals LLC | Mining, Quarrying, and Oil and Gas Extraction | $281,762 | $283,962 | 21 | <$5M | Research |
| Jorgensen Log Homes INC | Construction | $149,482 | $150,686 | 18 | $5.5M | Research |
| Encompass Employee Management INC | Professional, Scientific, and Technical Services | $143,700 | $144,720 | 10 | <$5M | Research |
| Sturgis Meats LLC | Manufacturing | $133,263 | $134,000 | 24 | $8.5M | Research |
| Feel Good Hospitality LLC | Accommodation and Food Services | $126,420 | $127,251 | 10 | <$5M | Research |
| Branch Construction Services LLC | Construction | $114,390 | $115,347 | 8 | <$5M | Research |
| Skogen Kitchen LLC | Accommodation and Food Services | $103,999 | $104,753 | 15 | <$5M | Research |
| Black Hills Burger and Bun Co. INC | Accommodation and Food Services | $92,665 | $93,036 | 16 | <$5M | Research |
| Feel Good Hospitality LLC | Accommodation and Food Services | $90,300 | $90,787 | 10 | <$5M | Research |
| Kainz Power Lines INC | Construction | $88,100 | $88,795 | 12 | <$5M | Research |
| Steel Express Logistics LLC | Unknown | $82,400 | $83,459 | 5 | N/A | Research |
| Southern Hills Publishing INC | Information | $77,927 | $78,388 | 12 | <$5M | Research |
| Sagacious, INC | Manufacturing | $77,400 | $78,161 | 11 | <$5M | Research |
| Skogen Kitchen | Accommodation and Food Services | $75,800 | $76,154 | 15 | <$5M | Research |
| Steele Collision Inc. | Other Services (except Public Administration) | $75,500 | $76,023 | 5 | <$5M | Research |
| Dakota Rotors, LLC (epc) / Black Hills Aerial Adventures, in | Real Estate and Rental and Leasing | $72,500 | $195,821 | 29 | $13.1M | Research |
| J&j Woodward Properties, Inc. | Agriculture, Forestry, Fishing and Hunting | $72,010 | $72,541 | 5 | <$5M | Research |
| Custer Community Pharmacy, LLC | Retail Trade | $69,300 | $69,501 | 12 | <$5M | Research |
| Branch Construction Services LLC | Construction | $68,736 | $69,187 | 11 | $12.5M | Research |
| Woodford Logging INC | Agriculture, Forestry, Fishing and Hunting | $67,628 | $68,226 | 9 | <$5M | Research |