| GIGuardian Industries - Dewitt | De Witt | IA | Nonmetallic Mineral Product Manufacturing327211 | 100-499 | ● ACTIVE |
| UGUS Gypsum - Sperry Plant | Mediapolis | IA | Wood Product Manufacturing321219 | 100-499 | ● ACTIVE |
| LTLloyd Table Company | Lisbon | IA | Nonmetallic Mineral Product Manufacturing327110 | — | ● ACTIVE |
Dumani Stone LLC | Evansdale | IA | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
Glass Fabricators INC | Grimes | IA | Nonmetallic Mineral Product Manufacturing327211 | — | ● ACTIVE |
Hahn Ready-mix CO | Davenport | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ● ACTIVE |
Indianola Precast, L.l.c | Indianola | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
Pdm Precast INC | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
Petersen Mfg. CO. | Denison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| 3M3m (minnesota Mining & Mfg Co) - Ames | Ames | IA | Nonmetallic Mineral Product Manufacturing327910 | — | ◐ LIKELY ACTIVE |
| BRBenton's Ready Mixed Concrete INC | Cedar Falls | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| BCBertch Cabinet, LLC. - Waterloo | Waterloo | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◐ LIKELY ACTIVE |
| BSBovard Studio INC | Fairfield | IA | Nonmetallic Mineral Product Manufacturing327211 | 20-99 | ◐ LIKELY ACTIVE |
| CRCti Ready Mix | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | 100-499 | ◐ LIKELY ACTIVE |
| CPCustom Precast CO | Cascade | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| ECEdwards Cast Stone Company | Dubuque | IA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| ICIowa City Ready Mix INC | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MRMetro Ready Mix, Lc | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| AIAmsco INC - Linwood Mining Lime Plant | Davenport | IA | Nonmetallic Mineral Product Manufacturing327410 | — | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix | West Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| NHNew Hampton Metal Fab | New Hampton | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| NNorthfield-rhino | West Des Moines | IA | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| SCSioux City Brick & Tile CO United Brick & Tile a Div | Adel | IA | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products | Creston | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Denison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Atlantic | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Clarinda | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Winterset | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Perry | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BSBellevue Sand & Gravel | Bellevue | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ 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 |
| FPForterra Pipe & Precast | Marshalltown | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ 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 |
| GGGeorgia-pacific Gypsum LLC - Fort Dodge | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| GAGreen America Recycling | Buffalo | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| LCLehigh Cement CO - Mason City Facility | Mason City | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| LRLiberty Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMidwest Precast Concrete Enterprises INC | Mount Pleasant | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PIPotters Industries INC | Muscatine | IA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company - Council Bluffs | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSioux City Brick & Tile Company | Sergeant Bluff | IA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SRStandard Ready Mix Concrete | Sioux City | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPCalcium Products Inc-gilmore City | Gilmore City | IA | Nonmetallic Mineral Product Manufacturing327410 | — | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix-Ames | Ames | IA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |