| AAArch Aluminum & Glass CO INC | Bettendorf | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| ARA-tec Recycling INC | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| BEBlended Equipment Solutions | Altoona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPCalcium Products INC | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| CICargill Inc-sioux City-refinery | Sioux City | IA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| CRCemstone--clarion Ready Mix Plant | Clarion | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-algona | Algona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-northwood | Northwood | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Carroll | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Greenfield | Greenfield | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix - Plant #3 - Grimes | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Red Oak | Red Oak | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Shenandoah | Shenandoah | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCohron Ready Mix-council Bluffs | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CIConcrete INC - Gifford | Union | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CTConcrete Technologies INC | Urbandale | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CTConcrete Technologies. INC | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCContinental Cement | West Des Moines | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| CLCozzini Llc-iowa Manufacturing Facility | Algona | IA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix INC | Mason City | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix, INC - Decorah | Decorah | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix Inc-elkader | Elkader | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix Inc-elma | Elma | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix Inc-west Union | West Union | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCti Ready Mix, INC | Carlisle | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| DPDukes Properties | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| FCFlynn CO | Iowa | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FCFlynn CO INC - Dubuque | Dubuque | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FCForterra Concrete Products - Cedar Rapids | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GAGcc Alliance Concrete Inc-akron | Akron | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GAGcc Alliance Concrete Inc-sioux Center | Sioux Center | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GCGlen-gery CORP | Redfield | IA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| GPGriffin Pipe Products Company | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| HRHawk-i Ready Mix | Coralville | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC - Burlington | Burlington | IA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC - Keokuk | Keokuk | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC - Knoxville | Knoxville | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IIIpc INC | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| KLKelderman Lime | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| LHLiberty Holdings | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MManatts | Bondurant | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MCManatts Concrete | Ankeny | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MIManatts, INC. | Walford | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MIManatt's INC - Huxley | Huxley | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MIManatt's INC - Newton | Newton | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MBMidwestern Bioag Holdings LLC | Davenport | IA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MRMoorhouse Ready Mix Inc-carroll | Carroll | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NINorwalk Iowa Ready Mix | Ankeny | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NRNorwalk Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
