| Mason City Motor Company LLC | Retail Trade | $446,100 | $451,317 | 36 | $9.1M |  Research |
| Charley Brown Community Daycare | Health Care and Social Assistance | $430,000 | $434,563 | 116 | N/A | Research |
| Heiny, Mcmanigal, Duffy, Stambaugh & Anderson Plc | Professional, Scientific, and Technical Services | $400,000 | $403,122 | 26 | $6.3M | Research |
| Brakke Implement, Inc. | Retail Trade | $399,400 | $401,885 | 31 | $6.4M | Research |
| Blazek Electric Inc. | Construction | $396,485 | $400,439 | 30 | $9.9M | Research |
| The Nettleton Dental Group | Health Care and Social Assistance | $383,500 | $236,168 | 19 | <$5M | Research |
| Kabrick Distributing Company of Mason City, Inc. | Wholesale Trade | $363,200 | $365,541 | 28 | $7.2M | Research |
| Brown Hospitality Corp. | Accommodation and Food Services | $362,180 | $364,615 | 65 | $11.5M | Research |
| Decker Sporting Goods, Inc. | Retail Trade | $359,669 | $361,827 | 34 | $8.0M | Research |
| Dental Center of North Iowa, L.c. | Health Care and Social Assistance | $359,500 | $263,332 | 22 | $5.1M | Research |
| North Iowa Anesthesia Associates, PC | Health Care and Social Assistance | $357,300 | $361,469 | 14 | <$5M | Research |
| North Iowa Eye Clinic P.c. | Health Care and Social Assistance | $354,900 | $357,719 | 28 | $8.8M | Research |
| Huber Supply Co. Inc. | Wholesale Trade | $352,300 | $354,981 | 28 | $7.2M | Research |
| Dimensional Graphics Corp | Manufacturing | $340,397 | $341,702 | 41 | $40.7M | Research |
| Midwest Roofing Company | Construction | $333,772 | $335,598 | 35 | $11.5M | Research |
| Schukei Chevrolet, Inc. | Retail Trade | $324,700 | $327,496 | 29 | $7.3M | Research |
| Midwest Construction and Supply INC | Construction | $323,800 | $265,328 | 33 | $37.6M | Research |
| Young Construction of North Iowa, Inc. | Construction | $319,400 | $163,690 | 21 | $23.9M | Research |
| Aeron Advanced Manufacturing, L.l.c. | Manufacturing | $299,552 | $301,799 | 42 | $41.7M | Research |
| Community Motors North, INC | Retail Trade | $299,160 | $302,002 | 29 | $7.3M | Research |
| Dimension Graphics, INC | Manufacturing | $295,900 | $297,560 | 46 | $45.6M | Research |
| B & E Franchises INC | Administrative and Support and Waste Management | $285,000 | $287,921 | 18 | <$5M | Research |
| Niss Excavation Inc. | Construction | $271,435 | $273,041 | 21 | $7.9M | Research |
| Decker Sporting Goods, Inc. | Retail Trade | $259,300 | $260,813 | 35 | $8.2M | Research |
| Mckiness Excavating, INC | Construction | $259,227 | $260,329 | 17 | $5.3M | Research |