Frc Component Products, INC. | Mason City | IA | Computer and Electronic Product Manufacturing334220 | 20-99 | ● ACTIVE |
| GGGolden Grain Energy, LLC | Mason City | 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 |
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 |
| 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 |
| 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 |
| SFSmithfield Foods | Mason City | IA | Food Manufacturing311612 | 100-499 | ◐ LIKELY ACTIVE |
| SPSmithfield Packaged Meats Corp. | Mason City | IA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| HIHolcim (us) INC - Mason City | Mason City | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| AMAlter Metal Recycling - Mason City Facility | Mason City | IA | Primary Metal Manufacturing331492 | — | ◇ 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 |
| WIWellborn Industries | Mason City | IA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| 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 |
| 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 |
| SIStellar Industries Mason City North | Mason City | IA | Transportation Equipment Manufacturing336111 | 20-99 | ◐ LIKELY ACTIVE |
| STStellar Truck and Trailer | Mason City | IA | Transportation Equipment Manufacturing336111 | 20-99 | ◐ LIKELY ACTIVE |
| AAAeron Advanced Manufacturing, L.l.c. | Mason City | IA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AIAadg, INC. | Mason City | IA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| AAAssa Abloy Door Group LLC | Mason City | IA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| GMGraham Machining Corporation | Mason City | IA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| JJJ & J Machining Welding & Fabrication | Mason City | IA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| MCMason City Recycling Center, LTD | Mason City | IA | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| PDPawsome Doggo LLC | Mason City | IA | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| TDTonka Division of Shannon Group | Mason City | IA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |