| HCHerschel CORP | Indianola | IA | Fabricated Metal Product Manufacturing332000 | — | ◇ UNVERIFIED |
| HIHeyn's Ice Cream | Iowa City | IA | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| HHH & H Fabrications | De Witt | IA | Transportation Equipment Manufacturing336991 | — | ◇ UNVERIFIED |
| HHH & H Trailers | Clarinda | IA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| HTH&h Trailers - Novae LLC | Red Oak | IA | Transportation Equipment Manufacturing336214 | — | ◇ UNVERIFIED |
| HIHirsch Industries INC | Des Moines | IA | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| HEHi-tech Electronic Assemblies INC | Council Bluffs | IA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| HCHni Corporation - North Campus | Muscatine | IA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| HMHolland Moving and Rigging Supplies | Forest City | IA | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| HSHome Sweet Cone Ice Cream, LLC | Waukee | IA | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| HCHon CO Equipment Services | Muscatine | IA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| HCHon Company, the | Muscatine | IA | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| HAHot Air Brewing Co LLC | Creston | IA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| HCHyponex Corporation | Pacific Junction | IA | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Chariton | Chariton | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Fort Madison | Fort Madison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Mt. Pleasant | Mount Pleasant | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Ottumwa | Ottumwa | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Pella | Pella | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Washington | Washington | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - West Burlington | West Burlington | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IPIJA Properties LLC | Farley | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| IIIlten's INC. | Cedar Rapids | IA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| IHIndustrial Hardfacing, Inc | Lamoni | IA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ISIndustrial Services Corporation | Burlington | IA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| ITIndustrial Tooling & Fabrication - Former Site of | Fort Madison | IA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| I6Industry 63, LLC | Waterloo | IA | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| IMInk Made Productions LLC | Centerville | IA | Textile Mills313310 | — | ◇ UNVERIFIED |
| ICInland Coatings | Adel | IA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| ILInroads, LLC | Des Moines | IA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| IDIntegrated Dna Technologies INC | Coralville | IA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| IDIntegrated Dna Technologies INC | Coralville | IA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| IAInternational Automotive Components | Iowa City | IA | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| ICInternational Casings Group, INC. | Ottumwa | IA | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| IIInternational Ingredient Corporation | Oskaloosa | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| IPInternational Paper | Cedar Rapids | IA | Paper Manufacturing322121 | — | ◇ UNVERIFIED |
| ISIntertrade Steel Corporation | Cedar Rapids | IA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| IIIntervet INC Dba Merck Animal Health Building 1 | Ames | IA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| IIIntervet INC Dba Merck Animal Health - Building 4 | Ames | IA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| IIIntervet INC Dba Merck Animal Health - Research Barn | Ames | IA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ICIowa Custom Cabinets, LLC | West Des Moines | IA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| IDIowa Drying and Processing | Sibley | IA | Food Manufacturing311514 | — | ◇ UNVERIFIED |
| IFIowa Falls Feed Mill | Iowa Falls | IA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| IFIowa Fertilizer Company | Wever | IA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
 Iowa Rotocast Plastics, INC. | Decorah | IA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| ISIowa Spring Manufacturing and Sales, Inc | Adel | IA | Fabricated Metal Product Manufacturing332613 | — | ◇ UNVERIFIED |
| ISIowa Steel Fabrication, LLC. | Osceola | IA | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| I5Ironwood 53 LLC | Rock Valley | IA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| JMJackson Millwork - Former Site of | Spirit Lake | IA | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| JLJacrec LLC | Anamosa | IA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
