 Archer Daniels Midland Company - Cedar Rapids | Cedar Rapids | IA | Food Manufacturing311221 | — | ◇ UNVERIFIED |
 Associated Milk Producers INC | Sanborn | IA | Food Manufacturing311513 | — | ◇ UNVERIFIED |
| APAtek Precision Castings | New Hampton | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AYA Y Mcdonald Mfg CO - Dubuque Facility | Dubuque | IA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| AIA.y.m., INC | Albia | IA | Fabricated Metal Product Manufacturing332913 | — | ◇ UNVERIFIED |
| BUBecker Underwood INC | Ames | IA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| BSBellevue Sand & Gravel | Bellevue | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBesser CO | Sioux City | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BQBesser Quinn Machine & Foundry | Boone | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BIBoehringer Ingelheim Vetmedica, INC - 5th St | Fort Dodge | IA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| CCCambrex Charles City, INC | Charles City | IA | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| CICargill INC - East Soybean Plant | Cedar Rapids | IA | Food Manufacturing311224 | — | ◇ UNVERIFIED |
| CICargill INC Nutrena Feeds Div | West Branch | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| CICargill Inc-sioux City-nutrena Feeds Div | Sioux City | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| CCCarroll Coolers, INC | Carroll | IA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| CTCarry-on Trailer CORP | Missouri Valley | IA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-fort Dodge South | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Audubon (historical) | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix INC | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CACollins Aerospace | Bellevue | IA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| CFConagra Frozen Foods Council Bluffs Ia | Council Bluffs | IA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| CICurbtender INC | Cedar Falls | IA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| DIDarling International INC | Clinton | IA | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| DODecorah Operations Acument Global Technologies Camcar LLC | Decorah | IA | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| DCDielectric Corporation | Lake Mills | IA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| DNDsm Nutritional Products INC | Ames | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| DSDubuque Stamping & Manufacturing INC | Dubuque | IA | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| EOEagle Ottawa LLC | Waterloo | IA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
 East Penn Manufacturing Co., INC | Corydon | IA | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| EIElectro-coatings, INC. | Cedar Rapids | IA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| FCFarmers Coop CO. - Afton Branch | Afton | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| FGFisher Gold Star Div Fisher Hydraulics | Laurens | IA | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| FPForterra Pipe & Precast | Marshalltown | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FOFriesen of Iowa | Storm Lake | IA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| GAGcc Alliance Concrete Incorporated | Sioux Center | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GOGcc - Orange City | Orange City | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GBGcc-sergeant Bluff | Sergeant Bluff | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 General Mills Operation INC | Carlisle | IA | Food Manufacturing311211 | — | ◇ UNVERIFIED |
| GGGeorgia-pacific Gypsum LLC - Fort Dodge | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| GAGreen America Recycling | Buffalo | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| HIHelena Industries | Des Moines | IA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| HTH&h Trailers - Novae LLC | Clarinda | IA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| HWHighline Warren | Council Bluffs | IA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HEHighway Equipment Company | Cedar Rapids | IA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| HFHubbard Feeds INC - South Plant | Sioux City | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| HCHydrite Chemical CO | Waterloo | IA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| ITInhance Technologies, LLC | Centerville | IA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| ICIowa Contract Fabricators, INC | Riceville | IA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| IItwc | Malcom | IA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| JCJacobs Corp-north & South Plants | Harlan | IA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
