| GIGuardian Industries - Dewitt | Dewitt | 100–499 | ● ACTIVE |
Hahn Ready-mix CO | Davenport | — | ● ACTIVE |
Lloyd Table Company | Lisbon | 20–99 | ● ACTIVE |
Petersen Mfg. CO. | Denison | 20–99 | ● ACTIVE |
| UGUS Gypsum - Sperry Plant | Mediapolis | 100–499 | ● ACTIVE |
Glass Fabricators INC | Grimes | 20–99 | ● ACTIVE |
Pdm Precast INC | Des Moines | 100–499 | ● ACTIVE |
Indianola Precast, L.l.c | Indianola | — | ● ACTIVE |
| BRBenton's Ready Mixed Concrete INC | Cedar Falls | 20–99 | ◐ LIKELY ACTIVE |
| BCBertch Cabinet, LLC. - Waterloo | Waterloo | 500+ | ◐ LIKELY ACTIVE |
| ICIowa City Ready Mix INC | Iowa City | 20–99 | ◐ LIKELY ACTIVE |
| MEMPC Enterprises Inc | Mount Pleasant | 100–499 | ◐ LIKELY ACTIVE |
| NRNorwalk Ready Mix Concrete, INC - Norwalk | Norwalk | 100–499 | ◐ LIKELY ACTIVE |
| 3M3m (minnesota Mining & Mfg Co) - Ames | Ames | — | ◐ LIKELY ACTIVE |
| BSBovard Studio INC | Fairfield | 20–99 | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix-Ames | Ames | 1–19 | ◐ LIKELY ACTIVE |
| CRCti Ready Mix | Grimes | 100–499 | ◐ LIKELY ACTIVE |
| CPCustom Precast CO | Cascade | 20–99 | ◐ LIKELY ACTIVE |
| ECEdwards Cast Stone Company | Dubuque | 20–99 | ◐ LIKELY ACTIVE |
| MRMetro Ready Mix, Lc | Iowa City | 1–19 | ◐ LIKELY ACTIVE |
| MPMidstates Precast Products | Bondurant | 20–99 | ◐ LIKELY ACTIVE |
| RORail One USA CORP | Clinton | 1–19 | ◐ LIKELY ACTIVE |
| SCSioux City Brick & Tile CO United Brick & Tile a Div | Adel | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products | Creston | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products | Des Moines | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products INC | Clarinda | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products INC | Atlantic | — | ◐ LIKELY ACTIVE |
| AIAmsco INC - Linwood Mining Lime Plant | Davenport | — | ◐ LIKELY ACTIVE |
| BSBellevue Sand & Gravel | Bellevue | — | ◐ LIKELY ACTIVE |
| CCCemstone Concrete Materials-fort Dodge South | Fort Dodge | — | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix | West Des Moines | — | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix INC | Grimes | — | ◐ LIKELY ACTIVE |
| CRCroell Redi-mix INC - New Hampton Plant | New Hampton | 500+ | ◐ LIKELY ACTIVE |
| FPForterra Pipe & Precast | Marshalltown | — | ◐ LIKELY ACTIVE |
| GAGcc Alliance Concrete Incorporated | Sioux Center | — | ◐ LIKELY ACTIVE |
| GLGcc - Le Marss | Le Mars | — | ◐ LIKELY ACTIVE |
| GOGcc - Orange City | Orange City | — | ◐ LIKELY ACTIVE |
| GBGcc-sergeant Bluff | Sergeant Bluff | — | ◐ LIKELY ACTIVE |
| GGGeorgia-pacific Gypsum LLC - Fort Dodge | Fort Dodge | — | ◐ LIKELY ACTIVE |
| GBGold Bond - Ftd Plant | Fort Dodge | — | ◐ LIKELY ACTIVE |
| GAGreen America Recycling | Buffalo | — | ◐ LIKELY ACTIVE |
| LCLehigh Cement CO - Mason City Facility | Mason City | — | ◐ LIKELY ACTIVE |
| LRLiberty Ready Mix | Des Moines | — | ◐ LIKELY ACTIVE |
| MPMidwest Precast Concrete Enterprises INC | Mount Pleasant | — | ◐ LIKELY ACTIVE |
| NHNew Hampton Metal Fab | New Hampton | — | ◐ LIKELY ACTIVE |
| NNorthfield-rhino | West Des Moines | — | ◐ LIKELY ACTIVE |
| PIPotters Industries INC | Muscatine | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company - Council Bluffs | Council Bluffs | — | ◐ LIKELY ACTIVE |
| SCSioux City Brick & Tile Company | Sergeant Bluff | — | ◐ LIKELY ACTIVE |
| SRStandard Ready Mix Concrete | Sioux City | — | ◐ LIKELY ACTIVE |