| AGArchitectural Glass Industries | Sandy Hook | CT | Nonmetallic Mineral Product Manufacturing327211 | 1-19 | ● ACTIVE |
| AAAvery Abrasives, INC | Trumbull | CT | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ● ACTIVE |
| BCBarnes Concrete Company, INC. | Putnam | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ● ACTIVE |
| BPBlakeslee Prestress INC | Branford | CT | Nonmetallic Mineral Product Manufacturing327390 | 100-499 | ● ACTIVE |
Composition Materials CO INC | Milford | CT | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ● ACTIVE |
Connecticut Precast Corporation | Monroe | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ● ACTIVE |
| CSConnecticut Stone | Milford | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
| CSCoreslab Structures (conn), INC | Thomaston | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ● ACTIVE |
Cromwell Concrete Products, Incorporated | Cromwell | CT | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ● ACTIVE |
Edison Coatings, INC | Plainville | CT | Nonmetallic Mineral Product Manufacturing327310 | 1-19 | ● ACTIVE |
| EIElm-cap Industries, INC | West Hartford | CT | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ● ACTIVE |
F & F Concrete Corporation, the | Plantsville | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ● ACTIVE |
| KLKenneth Lynch & Sons, Incorporated | Oxford | CT | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
Mono Crete Step CO of Ct LLC | Bethel | CT | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ● ACTIVE |
| PSParamount Stone Company, LLC | Stamford | CT | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ● ACTIVE |
| RMRose Mill Company LLC | West Hartford | CT | Nonmetallic Mineral Product Manufacturing327999 | 1-19 | ● ACTIVE |
| RSR Stone Co., LLC | Bridgeport | CT | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ● ACTIVE |
| SASuzio Asphalt CO Inc, L | Meriden | CT | Petroleum and Coal Products Manufacturing324121 | 1-19 | ● ACTIVE |
| UAUnited Abrasives INC | North Windham | CT | Nonmetallic Mineral Product Manufacturing327910 | 100-499 | ● ACTIVE |
| UCUnited Concrete Products, INC | Yalesville | CT | Nonmetallic Mineral Product Manufacturing327390 | 100-499 | ● ACTIVE |
Ct Fiberoptics, INC | Somers | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ● ACTIVE |
| DMDmr Materials, LLC | Bloomfield | CT | Nonmetallic Mineral Product Manufacturing327999 | 1-19 | ● ACTIVE |
Five Star Products, INC. | Shelton | CT | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
| KRKobyluck Ready-mix INC | Waterford | CT | Nonmetallic Mineral Product Manufacturing327320 | — | ● ACTIVE |
US Barricades, LLC | Darien | CT | Nonmetallic Mineral Product Manufacturing327331 | — | ● ACTIVE |
| CFConcrete Feliz, LLC | Danielson | CT | Nonmetallic Mineral Product Manufacturing327331 | — | ● ACTIVE |
| DSDelgado Stone Distributors | Brookfield | CT | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ● ACTIVE |
Greenmaker Industries of Connecticut LLC | West Hartford | CT | Nonmetallic Mineral Product Manufacturing327999 | — | ● ACTIVE |
Nano Solutions LLC | Bridgeport | CT | Nonmetallic Mineral Product Manufacturing327110 | — | ● ACTIVE |
New England Metal Finishing LLC | Windsor | CT | Nonmetallic Mineral Product Manufacturing327910 | — | ● ACTIVE |
| TSTerra Stonecraft LLC | Ansonia | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
United Concrete Products INC. | Wallingford | CT | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
| BCBuilders Concrete East | Windham | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| DAD and D Carbide Grinding INC. | Berlin | CT | Nonmetallic Mineral Product Manufacturing327910 | 20-99 | ◐ LIKELY ACTIVE |
| DBDevine Bros Heating | Norwalk | CT | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| ETEnfield Transit Mix | Enfield | CT | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| OGO & G Industries | Danbury | CT | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| UAUnited Abrasives INC | Willimantic | CT | Nonmetallic Mineral Product Manufacturing327910 | — | ◐ LIKELY ACTIVE |
| OIOldcastle Infrastructure | Avon | CT | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| OROldcastle Retail INC (dba Bonsal American) | Canaan | CT | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| SSSeymour's Sand & Stone, INC | Bozrah | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| BCBuilders Concrete East LLC | Manchester | CT | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SYSuzio York Hill Concrete | New Haven | CT | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| APAdvanced Photonics International, INC. | Fairfield | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ◐ LIKELY ACTIVE |
| ACArrow Concrete | Granby | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| SLShort Load Concrete 2 LLC | Milford | CT | Nonmetallic Mineral Product Manufacturing327310 | — | ▲ REPORTED CLOSED |
| DEDawn Enterprises, LLC | Manchester | CT | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| OSOntra Stone Concepts, LLC | Bridgeport | CT | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◇ UNVERIFIED |
| BMBurton's Monument Shop, LLC | Waterbury | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | East Granby | CT | Nonmetallic Mineral Product Manufacturing327110 | — | ◐ LIKELY ACTIVE |