| Mason City Area Nursing Home Association Inc. | Health Care and Social Assistance | $518,290 | $521,528 | 90 | $15.3M |  AI Deep Dive |
| Mason County Transfer, Inc. | Transportation and Warehousing | $215,600 | $218,157 | 22 | <$5M | AI Deep Dive |
| Hull Trucking of Mason City, Inc. | Transportation and Warehousing | $186,850 | $187,807 | 18 | <$5M | AI Deep Dive |
| Hull Trucking of Mason City, Inc. | Transportation and Warehousing | $186,850 | $187,509 | 18 | <$5M | AI Deep Dive |
| Hernan's Plumbing & Heating INC | Construction | $74,944 | $75,258 | 6 | <$5M | AI Deep Dive |
| Laflen Cunningham Insurance Agency Ltd | Finance and Insurance | $62,324 | $62,605 | 5 | <$5M | AI Deep Dive |
| Locked Up Trucking, LLC | Transportation and Warehousing | $57,899 | $58,464 | 4 | <$5M | AI Deep Dive |
| Kirk Martin | Agriculture, Forestry, Fishing and Hunting | $46,292 | $46,520 | 10 | <$5M | AI Deep Dive |
| Julianne Manuel | Retail Trade | $43,419 | $43,664 | 6 | <$5M | AI Deep Dive |
| Phillip Kirby | Professional, Scientific, and Technical Services | $37,054 | $37,207 | 4 | <$5M | AI Deep Dive |
| Randy Lee Taylor | Finance and Insurance | $36,400 | $21,025 | 1 | <$5M | AI Deep Dive |
| First Christian Church of Mason City | Other Services (except Public Administration) | $36,111 | $36,336 | 11 | N/A | AI Deep Dive |
| K C Electric of Illinois, Inc. | Construction | $35,030 | $35,232 | 3 | <$5M | AI Deep Dive |
| Steven Krause | Agriculture, Forestry, Fishing and Hunting | $34,211 | $34,358 | 2 | <$5M | AI Deep Dive |
| Mason City Christian Church | Other Services (except Public Administration) | $34,036 | $34,227 | 10 | N/A | AI Deep Dive |
| Phillip M. Kirby | Professional, Scientific, and Technical Services | $32,176 | $32,318 | 3 | <$5M | AI Deep Dive |
| Jeffery D Birch | Agriculture, Forestry, Fishing and Hunting | $31,897 | $32,014 | 2 | <$5M | AI Deep Dive |
| Steven Bergman | Agriculture, Forestry, Fishing and Hunting | $31,403 | $31,714 | 3 | <$5M | AI Deep Dive |
| Steven C Bergman | Agriculture, Forestry, Fishing and Hunting | $31,401 | $31,566 | 4 | <$5M | AI Deep Dive |
| Darrel Behrends | Agriculture, Forestry, Fishing and Hunting | $31,321 | $31,464 | 3 | <$5M | AI Deep Dive |
| Tracy Olson Insurance Agency, INC | Finance and Insurance | $30,597 | $30,752 | 3 | <$5M | AI Deep Dive |
| Benjamin R Onken | Agriculture, Forestry, Fishing and Hunting | $30,193 | $30,416 | 2 | <$5M | AI Deep Dive |
| Guy's Auto Repair | Other Services (except Public Administration) | $29,548 | $29,695 | 2 | <$5M | AI Deep Dive |
| Clint R Liesman | Agriculture, Forestry, Fishing and Hunting | $29,222 | $29,372 | 1 | <$5M | AI Deep Dive |
| Gm Traders Inc. | Retail Trade | $28,744 | $28,909 | 14 | <$5M | AI Deep Dive |