Frc Component Products, INC. | Mason City, IA | Computer and Electronic Product Manufacturing334220 | 20–99 | ● ACTIVE |
| PBPoet Biorefining - Hanlontown LLC | Hanlontown, IA | Chemical Manufacturing325193 | 20–99 | ● ACTIVE |
Heartland Asphalt, INC | Mason City, IA | Petroleum and Coal Products Manufacturing324121 | — | ● ACTIVE |
Metalcraft, INC. | Mason City, IA | Printing and Related Support Activities323111 | — | ● ACTIVE |
| NFNorthwood Foods, LLC | Northwood, IA | Food Manufacturing311612 | 100–499 | ● ACTIVE |
Petroblend CORP. | Mason City, IA | Petroleum and Coal Products Manufacturing324191 | — | ● ACTIVE |
| APAg Processing Incorporated | Mason City, IA | Food Manufacturing311222 | 20–99 | ◐ LIKELY ACTIVE |
| KFKraft Foods Global INC - Mason City | Mason City, IA | Food Manufacturing311919 | 100–499 | ◐ LIKELY ACTIVE |
| RMReg Mason City | Mason City, IA | Chemical Manufacturing325199 | 20–99 | ◐ LIKELY ACTIVE |
| CDCurries Division of Aadg, INC - 12th St Nw | Mason City, IA | Fabricated Metal Product Manufacturing332321 | — | ◐ LIKELY ACTIVE |
| GGGolden Grain Energy, LLC | Mason City, IA | Chemical Manufacturing325193 | 20–99 | ◐ LIKELY ACTIVE |
| WCWoodharbor Custom Cabinetry | Mason City, IA | Wood Product Manufacturing321911 | — | ◐ LIKELY ACTIVE |
| NBNuta Blend (purina Animal Nutrition/land O' Lakes) | Mason City, IA | Food Manufacturing311119 | — | ◐ LIKELY ACTIVE |
| LCLehigh Cement CO - Mason City Facility | Mason City, IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| MRMinnesota Rubber & Plastics | Mason City, IA | Plastics and Rubber Products Manufacturing326291 | — | ◇ UNVERIFIED |
| DGDimensional Graphics Corp | Mason City, IA | Printing and Related Support Activities323111 | 20–99 | ◐ LIKELY ACTIVE |
| AEAda Enterprises INC | Northwood, IA | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CKCargill Kitchen Solutions | Mason City, IA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| CCurries | Mason City, IA | Fabricated Metal Product Manufacturing332321 | 500+ | ◐ LIKELY ACTIVE |
| CDCurries Div of Aadg INC | Mason City, IA | Fabricated Metal Product Manufacturing332321 | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials US Cement LLC (remediation Site) | Mason City, IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| MCMidland Concrete Products Clear Lake | Clear Lake, IA | Nonmetallic Mineral Product Manufacturing327331 | 20–99 | ◐ LIKELY ACTIVE |
| NHNew Heaven Chemicals, INC. | Manly, IA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| SFSmithfield Foods | Mason City, IA | Food Manufacturing311612 | 100–499 | ◐ LIKELY ACTIVE |
| SPSmithfield Packaged Meats Corp. | Mason City, IA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| TDTrustile Doors - Northwood | Northwood, IA | Wood Product Manufacturing321911 | 100–499 | ◐ LIKELY ACTIVE |
| HIHolcim (us) INC - Mason City | Mason City, IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ACAdvanced Component Technologies Incorporated | Northwood, IA | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Mason City Facility | Mason City, IA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| APAndrews Prestressed Concrete INC | Clear Lake, IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-northwood | Northwood, IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix INC | Mason City, IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CDCurries Division of Aadg, INC - 9th Street | Mason City, IA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Mason City, IA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Mason City, IA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| PFPippert Farms | Mason City, IA | Food Manufacturing311919 | — | ◇ UNVERIFIED |
| QCQuality Composites | Northwood, IA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| RRRandall Ready Mix LLC - Manly | Manly, IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| WIWellborn Industries | Mason City, IA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| 1C173 Craft Distillery | Clear Lake, IA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| AAAERON Advanced Manufacturing | Mason City, IA | Plastics and Rubber Products Manufacturing326199 | 20–99 | ◐ LIKELY ACTIVE |
| BLBarkwins LLC | Mason City, IA | Food Manufacturing311111 | — | ◐ LIKELY ACTIVE |
| CDChurch Dwight Mason City | Mason City, IA | Food Manufacturing311119 | 20–99 | ◐ LIKELY ACTIVE |
| ECEggs-Mason City IA | Mason City, IA | Food Manufacturing311999 | 100–499 | ◐ LIKELY ACTIVE |
| LALazy Acre Vineyard | Lake Mills, IA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| LILeMar Industries-SHE | Sheffield, IA | Fabricated Metal Product Manufacturing332999 | 20–99 | ◐ LIKELY ACTIVE |
| MCMason City | Mason City, IA | Wood Product Manufacturing321911 | 20–99 | ◐ LIKELY ACTIVE |
| MCMason City Branch | Mason City, IA | Beverage and Tobacco Product Manufacturing312111 | 20–99 | ◐ LIKELY ACTIVE |
| NPNine Pines Vineyard and Winery, LLC | Northwood, IA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| NBNutra Blend Mason City | Mason City, IA | Food Manufacturing311119 | 20–99 | ◐ LIKELY ACTIVE |