| ACAmerican Concrete Products INC | Perry | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Winterset | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Denison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Audubon (historical) | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CIConcrete INC - Marshalltown | Marshalltown | IA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| GCGreene County Redi-mix INC - Jefferson | Jefferson | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| JCJas Construction, LLC | Altoona | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MRMoorhouse Ready Mix Inc-breda (port Plt) | Breda | IA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| SRSpringville Ready Mix Company | Springville | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| ACAmerican Concrete Products | Johnston | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Jefferson | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| APAndrews Prestressed Concrete INC | Clear Lake | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| 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 |
| CCCemstone Concrete Materials-algona | Algona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Carroll | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Guthrie Center | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Adel | 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 - Decorah | Decorah | 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 |
