| APAdel Plant | Adel | IA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| ANAfinitas- New Hampton location | New Hampton | IA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| CIC2 Iowa Des Moines Dixon Avenue | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| CPCalcium Products- Fort Dodge, IA Plant | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | 20-99 | ◐ LIKELY ACTIVE |
| CRCedar Rapids (1018) | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix-Grimes Plant | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| COCorporate Office (9900) | New Hampton | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| DPDelaware Plant | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| DDsmcp3 | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327332 | 1-19 | ◐ LIKELY ACTIVE |
| DDsmcp4 | Marshalltown | IA | Nonmetallic Mineral Product Manufacturing327332 | 20-99 | ◐ LIKELY ACTIVE |
| ESElite Stone Fabrication | Lisbon | IA | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| EElkhart | Elkhart | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| GIGreenfield IG | Greenfield | IA | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |
| GGrimes | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| HRHawkeye Ready Mix Coralville | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327310 | 20-99 | ◐ LIKELY ACTIVE |
| ICIowa City | Iowa City | IA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| KCKing's Cedar Rapids Block | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| KEKing's Eldridge | Eldridge | IA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| MMarion (Chesapkeake) | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ◐ LIKELY ACTIVE |
| MSMicro Surface Finishing | Wilton | IA | Nonmetallic Mineral Product Manufacturing327910 | 20-99 | ◐ LIKELY ACTIVE |
| MHMidland Hiawatha | Hiawatha | IA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| MPMidstates Precast Products | Bondurant | IA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| NNorwalk | Norwalk | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| PVPleasant Valley Redi-mix, INC | Bettendorf | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| PIPotters Industries-Muscatine | Muscatine | IA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| QCQuality Concrete Company | Clinton | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| RRRogers Ready Mix | Marion | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SCSEK Corporation / Norton | Dexter | IA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| SRStreb Ready Mix, LLC | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| TKThe Kitchen and Bath Company - Creekview | Ankeny | IA | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| WCWeyrick, Chris | Wapello | IA | Nonmetallic Mineral Product Manufacturing327991 | — | ◐ LIKELY ACTIVE |
| ZEZero Energy Systems | Coralville | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| ATAdamantite Technologies, LLC | Eldridge | IA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| ACAmerican Colloid Co-waterloo | Waterloo | IA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products - Algona | Algona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| APAndrew's Prestressed Concrete | Clear Lake | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| AMArch Mirror North | Bettendorf | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| BSBuilders Sand and Cement CO. INC. | Davenport | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BWBurlington Wilbert Vault Works, INC. | Burlington | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Denison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Audubon | Audubon | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix - Audubon Facility | Audubon | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Manning | Manning | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Mt. Ayr | Mount Ayr | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Perry | Perry | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Shenandoah | Shenandoah | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CGCertainteed Gypsum & Ceiling Mfg, INC | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| CMConcrete Mobility | Lakota | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CSConcrete Supply | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FSFour Seasons Excavation and Landscaping, INC. | West Burlington | IA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |