| Mckiness Excavating, INC | Construction | $259,200 | $260,690 | 17 | $5.3M |  Research |
| Brown Hospitality Corp. | Accommodation and Food Services | $258,700 | $260,158 | 80 | $14.2M | Research |
| Mechanical Air Systems Company | Construction | $251,767 | $253,340 | 20 | $6.3M | Research |
| Mechanical Air Systems Company | Construction | $251,767 | $253,491 | 20 | $6.3M | Research |
| H.c. Determan Electric Company | Construction | $246,600 | $241,477 | 12 | <$5M | Research |
| Niad Center for Human Development | Health Care and Social Assistance | $243,400 | $202,335 | 25 | N/A | Research |
| Hearing Associates, P.c. | Health Care and Social Assistance | $234,900 | $236,597 | 16 | <$5M | Research |
| Nettleton Dental Group P.c. | Health Care and Social Assistance | $234,370 | $235,418 | 18 | <$5M | Research |
| Willowbrook Foods, Inc. | Accommodation and Food Services | $230,500 | $232,216 | 24 | <$5M | Research |
| Hogan-Bremer-Moore Colonial Chapels | Other Services (except Public Administration) | $226,300 | $227,828 | 12 | <$5M | Research |
| Turning Leaf Counseling, INC | Health Care and Social Assistance | $226,300 | $203,463 | 19 | <$5M | Research |
| Teggatz Enterprises, Inc. | Administrative and Support and Waste Management | $221,000 | $223,142 | 31 | $6.7M | Research |
| Fiahc, Inc. | Finance and Insurance | $218,700 | $220,219 | 19 | $9.8M | Research |
| Dental Center of North Iowa, L.c. | Health Care and Social Assistance | $216,897 | $218,156 | 22 | $5.1M | Research |
| Niss Excavation, Inc. | Construction | $215,400 | $217,153 | 19 | $7.1M | Research |
| Hosmer Automotive INC | Retail Trade | $213,170 | $214,467 | 15 | <$5M | Research |
| Hosmer Automotive, INC | Retail Trade | $213,100 | $214,746 | 15 | <$5M | Research |
| Allied Purchasing Company | Wholesale Trade | $211,160 | $212,339 | 17 | $5.2M | Research |
| A & N of River City, Inc. | Unknown | $208,900 | $210,357 | 21 | N/A | Research |
| Elor Inc. | Professional, Scientific, and Technical Services | $206,440 | $207,570 | 20 | <$5M | Research |
| Mason City Recycling Center | Wholesale Trade | $205,400 | $206,923 | 17 | $5.2M | Research |
| Mason City Power Sports, Inc. | Retail Trade | $203,100 | $204,290 | 17 | <$5M | Research |
| Linahon Electric Inc. | Construction | $196,835 | $197,912 | 12 | <$5M | Research |
| Linahon Electric, Inc. | Construction | $196,800 | $199,249 | 15 | <$5M | Research |
| Neurosurgery of North Iowa, P.c. | Health Care and Social Assistance | $192,500 | $194,676 | 6 | <$5M | Research |