| OGOcean Glass & Mirror Co., INC. | Lowell | MA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| OSOmni Stone Works, INC. | Westborough | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| OMOnyx Marble & Granite, INC. | Framingham | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| PSProline Services Inc. | Oxford | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| RSRegal Stone Incorporated | Worcester | MA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| RGRevolution Granite, LLC | Tewksbury | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| RJR J Paquette | Holden | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RSRock Solid Fabrication, Inc. | Pembroke | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| RCRosenfeld Concrete CORP | Framingham | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRowley Ready Mix, Inc. | Gloucester | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SUSaand US LLC | Webster | MA | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| SCS.barzola Construction CORP. | Braintree | MA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| SMSelect Marble & Granite | Everett | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| SPStone Pro's | Haverhill | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| SSStone Solutions Granite | Mansfield | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| SIStonetek Imports, INC. | New Bedford | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| TSThe Stoneworks Co., INC. | Holliston | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| USUnderground Supply, Inc. | Whately | MA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Oxford | MA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| VBVarney Bros Sand & Gravel | Medfield | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
