| ACAmerican Concrete Industries | Veazie | ME | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| SCSuperior Concrete | Auburn | ME | Nonmetallic Mineral Product Manufacturing327332 | 20-99 | ◐ LIKELY ACTIVE |
| CFCianbro Fabrication and Coating | Pittsfield | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| DPDragon Products CO - Thomaston | Thomaston | ME | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| FCFerraiolo Construction, INC. | Thomaston | ME | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| HBHughes Bros., INC. | Hampden | ME | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MMMorningstar Marble & Granite, Inc. | Topsham | ME | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| POPrecast of Maine | Topsham | ME | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SCSurface Creations of Maine LLC | Portland | ME | Nonmetallic Mineral Product Manufacturing327111 | 20-99 | ◐ LIKELY ACTIVE |
| WCWardwell Construction and Trucking CORP - Bucksport | Bucksport | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| DPDurastone Precast Incorporated-south Portland | South Portland | ME | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| KRKeystone Real Estate Property LLC | Rockland | ME | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| MBMorin Brick CO | Auburn | ME | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
| SMSargent Materials | East Machias | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| BMBOSM Monarch Mountain | Acton | ME | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| GSGagne & Son Corporate | Belgrade | ME | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| HCHancock Concrete Plant | Hancock | ME | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| LCLee's Concrete, INC. | Millinocket | ME | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| LCLincoln Concrete Plant | Lincoln | ME | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SCSearsport Concrete Plant | Searsport | ME | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| WGWestbrook Granite Works | Westbrook | ME | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |