- Central Stone Co
- Crider Brothers Lime Co
- Glasgow Quarries
- KNOX County Stone Co
- Lamb Stone Co
- Le Claire Quarries
- Le Claire Quarries
- Martin Marietta Aggregates
- Norris Aggregates
- Old Castle
- River Stone Group Inc
- River Stone Inc
- River Stone Inc
- Seubert Excavators Shop
- Tower Rock Stone Co
- Valley Equipment Co Inc
