 713 Precast LLC | Toa Alta | — | ● ACTIVE |
 Baruch Enterprise LLC | Guaynabo | — | ● ACTIVE |
 Concre-tech INC | San Juan | — | ● ACTIVE |
 Ecologica Carmelo, INC. | Toa Baja | — | ● ACTIVE |
 Enzymatic Holdings Corporation | Manati | — | ● ACTIVE |
 Marxuach Precast Solutions LLC | Guaynabo | — | ● ACTIVE |
| ASArgos San Juan (fka Essroc) | Dorado | — | ◐ LIKELY ACTIVE |
| BCBloques Caribe INC | Guaynabo | — | ◐ LIKELY ACTIVE |
| CDCemex De Puerto Rico, INC. | Ponce | — | ◐ LIKELY ACTIVE |
| CPCantera Perez | Humacao | — | ◇ UNVERIFIED |
| CCCemex Concretos INC | Humacao | — | ◇ UNVERIFIED |
| CCCemex Concretos, INC. (formerly, Ready Mix, Plant 20) | Guaynabo | — | ◇ UNVERIFIED |
| EMEl Morro Corrugated | Vega Alta | — | ◇ UNVERIFIED |
| JFJ. F. Asociados, INC. | Juncos | — | ◇ UNVERIFIED |
| MAMaster Aggregates Carolina | Carolina | — | ◇ UNVERIFIED |
| MAMaster Aggregates Plant 5 | Caguas | — | ◇ UNVERIFIED |
| MCMaster Concrete Plant 5 | San Juan | — | ◇ UNVERIFIED |
| OSOriental Sand & Gravel | Yabucoa | — | ◇ UNVERIFIED |
| OIOwens Illinois De Pr | Vega Alta | — | ◇ UNVERIFIED |
| PCPonce Concrete Blk 1 | Ponce | — | ◇ UNVERIFIED |
| PRPuerto Rico Aggregates | Carolina | — | ◇ UNVERIFIED |
| ADAluminios De America LLC | Cabo Rojo | — | ◐ LIKELY ACTIVE |
| CSCentro Sur Ready Mix LLC | Aibonito | — | ◐ LIKELY ACTIVE |
| CLConstructora La Pica INC. | Jayuya | — | ◐ LIKELY ACTIVE |
| CCCorozal Concrete Service INC | Corozal | — | ◐ LIKELY ACTIVE |
| FCFuentes Concrete Pile CO INC | Sabana Seca | — | ◐ LIKELY ACTIVE |
| GCGalo Concrete LLC | Patillas | — | ◐ LIKELY ACTIVE |
| MSMr Sun Concrete INC | Humacao | — | ◐ LIKELY ACTIVE |
| NPNorvan Professional Concrete CORP | Orocovis | — | ◐ LIKELY ACTIVE |
| OQOrnamentacion Quintana, INC | Dorado | — | ◐ LIKELY ACTIVE |
| PPplanta pilotes | Sabana Seca | 20–99 | ◐ LIKELY ACTIVE |
| PPPower Precast Products CORP | Rio Grande | — | ◐ LIKELY ACTIVE |
| POPrefabricados Orama LLC | Arecibo | — | ◐ LIKELY ACTIVE |
| PRProfessional Ready Mix INC | San Juan | — | ◐ LIKELY ACTIVE |
| RRRodriguez Ready Mix , INC | Hormigueros | — | ◐ LIKELY ACTIVE |
| APAtlantic Pipe CORP | Juana Diaz | — | ◇ UNVERIFIED |
| APAtlantic Pipe CORP | Santurce | — | ◇ UNVERIFIED |
| BABetteroads Asphalt Corporation Planta 10 | Manati | — | ◇ UNVERIFIED |
| BEBloquera El Valle INC. | Lajas | — | ◇ UNVERIFIED |
| CSCantera San Antonio | Guaynabo | — | ◇ UNVERIFIED |
| CDCanteras De Puerto Rico | Guaynabo | — | ◇ UNVERIFIED |
| CCCaribbean Cast Stone INC | Toa Alta | — | ◇ UNVERIFIED |
| CCCemex Concretos INC | Isabela | — | ◇ UNVERIFIED |
| CSConcretera S Demetri | Vieques | — | ◇ UNVERIFIED |
| CMConcretos Metropolitanos LLC | Guaynabo | — | ◇ UNVERIFIED |
| CDCristaleria Del Sur | Ponce | — | ◇ UNVERIFIED |
| CLCristaleria La Vega INC | Barranquitas | — | ◇ UNVERIFIED |
| CICristalex INC | Toa Baja | — | ◇ UNVERIFIED |
| EDE D H CORP. | Carolina | — | ◇ UNVERIFIED |
| EDE D H CORP. | Carolina | — | ◇ UNVERIFIED |
