| Sully Transport, Inc. | Transportation and Warehousing | $667,280 | $674,702 | 45 | $9.1M |  Research |
| Janco Industries, Inc. | Wholesale Trade | $579,600 | $582,824 | 57 | $17.5M | Research |
| Zylstra Express, Ltd. | Transportation and Warehousing | $162,442 | $163,470 | 15 | <$5M | Research |
| Killduff Transport, INC | Transportation and Warehousing | $150,900 | $152,241 | 17 | <$5M | Research |
| Center Point Electric Inc. | Construction | $147,257 | $148,516 | 13 | <$5M | Research |
| Kruseman Implement, Inc. | Wholesale Trade | $137,086 | $137,768 | 11 | <$5M | Research |
| Earth Works Inc. | Administrative and Support and Waste Management | $113,696 | $114,529 | 9 | <$5M | Research |
| Kruseman Fertilizer Company | Agriculture, Forestry, Fishing and Hunting | $109,222 | $109,571 | 13 | <$5M | Research |
| Kruseman Fertilizer Company | Agriculture, Forestry, Fishing and Hunting | $104,994 | $105,755 | 10 | <$5M | Research |
| Lynnville Repair, Inc. | Other Services (except Public Administration) | $85,000 | $85,616 | 11 | <$5M | Research |
| Star Auto Co Inc. | Other Services (except Public Administration) | $78,576 | $79,174 | 9 | <$5M | Research |
| Society for Christian Education of Sully Iowa | Educational Services | $76,032 | $76,455 | 16 | N/A | Research |
| Star Auto Co. Inc. | Other Services (except Public Administration) | $64,320 | $64,652 | 11 | <$5M | Research |
| Huyser Family Dairy | Agriculture, Forestry, Fishing and Hunting | $48,300 | $48,708 | 14 | <$5M | Research |
| Sully Plumbing & Heating, Inc. | Construction | $47,900 | $48,182 | 7 | <$5M | Research |
| Lynnville Transport, Inc. | Transportation and Warehousing | $46,045 | $46,270 | 6 | <$5M | Research |
| Scott Nikkel Trucking, LLC | Transportation and Warehousing | $42,527 | $42,843 | 5 | <$5M | Research |
| Pt Investments Inc. | Accommodation and Food Services | $42,035 | $42,295 | 6 | <$5M | Research |
| Inspirations Childcare & Preschool Center | Health Care and Social Assistance | $41,002 | $41,205 | 17 | N/A | Research |
| Zylstra Commodities Inc. | Transportation and Warehousing | $39,792 | $40,033 | 2 | <$5M | Research |
| Core Communications INC | Information | $39,055 | $39,677 | 1 | <$5M | Research |
| Inspirations Childcare & Preschool Center | Health Care and Social Assistance | $39,050 | $39,220 | 17 | N/A | Research |
| Rc Nikkel LLC | Retail Trade | $38,413 | $38,573 | 13 | <$5M | Research |
| Northridge Estate Builders INC | Construction | $34,977 | $35,218 | 5 | <$5M | Research |
| Sully Oil Company | Other Services (except Public Administration) | $32,750 | $32,926 | 5 | <$5M | Research |