713 Precast LLC | Toa Alta | 1–19 | ● ACTIVE |
Baruch Enterprise LLC | Guaynabo | — | ● ACTIVE |
Marxuach Precast Solutions LLC | Guaynabo | — | ● ACTIVE |
Concre-tech INC | San Juan | — | ● ACTIVE |
Ecologica Carmelo, INC. | Toa Baja | — | ● ACTIVE |
Enzymatic Holdings Corporation | Manati | — | ● ACTIVE |
| ASArgos San Juan (fka Essroc) | Dorado | — | ◐ LIKELY ACTIVE |
| CCCorozal Concrete Service INC | Corozal | 20–99 | ◐ LIKELY ACTIVE |
| FCFuentes Concrete Pile CO INC | Sabana Seca | 1–19 | ◐ LIKELY ACTIVE |
| GCGalo Concrete LLC | Patillas | 20–99 | ◐ LIKELY ACTIVE |
| OQOrnamentacion Quintana, INC | Dorado | 1–19 | ◐ LIKELY ACTIVE |
| PPPower Precast Products CORP | Rio Grande | 20–99 | ◐ LIKELY ACTIVE |
| PRProfessional Ready Mix INC | San Juan | 20–99 | ◐ LIKELY ACTIVE |
| RRRodriguez Ready Mix , INC | Hormigueros | — | ◐ LIKELY ACTIVE |
| CMCantera Medina | Aguadilla | — | ◐ LIKELY ACTIVE |
| CPCantera Perez | Humacao | — | ◐ LIKELY ACTIVE |
| BCBloques Caribe INC | Guaynabo | 20–99 | ◐ LIKELY ACTIVE |
| CSCentro Sur Ready Mix LLC | Aibonito | — | ◐ LIKELY ACTIVE |
| CLConstructora La Pica INC. | Jayuya | — | ◐ LIKELY ACTIVE |
| MSMr Sun Concrete INC | Humacao | — | ◐ LIKELY ACTIVE |
| NPNorvan Professional Concrete CORP | Orocovis | — | ◐ LIKELY ACTIVE |
| POPrefabricados Orama LLC | Arecibo | — | ◐ LIKELY ACTIVE |
| BEBloquera El Valle INC. | Lajas | 1–19 | ◐ LIKELY ACTIVE |
| EJEmpresas J. Velazco INC. | San Juan | 1–19 | ◐ LIKELY ACTIVE |
| MMMacro Mix INC. | Hormigueros | 20–99 | ◐ LIKELY ACTIVE |
| CCCaribbean Cast Stone INC | Toa Alta | — | ◐ LIKELY ACTIVE |
| CDCemex De Puerto Rico, INC. | Ponce | — | ◐ LIKELY ACTIVE |
| GGGlasstra Group LLC | Catano | — | ◐ LIKELY ACTIVE |
| SLSantiago Lopez Concrete INC. | Lajas | — | ◐ LIKELY ACTIVE |
| CCCemex Concretos INC | Humacao | — | ◇ UNVERIFIED |
| CCCemex Concretos, INC. (formerly, Ready Mix, Plant 20) | Guaynabo | — | ◇ 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 |
| PRPuerto Rico Aggregates | Carolina | — | ◇ UNVERIFIED |
| ADAluminios De America LLC | Cabo Rojo | — | ▲ REPORTED CLOSED |
| PPplanta pilotes | Sabana Seca | 20–99 | ◐ LIKELY ACTIVE |
| APAtlantic Pipe CORP | Juana Diaz | 20–99 | ◇ UNVERIFIED |
| CLComercial Lapino | San Sebastian | 20–99 | ◇ UNVERIFIED |
| CICristalex INC | Toa Baja | 1–19 | ◇ UNVERIFIED |
| HCHormigonera Chaparro INC Dba Expreso Ready Mix | Aguada | 20–99 | ◇ UNVERIFIED |
| HOHormigonera Oriental | Isabela | 1–19 | ◇ UNVERIFIED |
| MCMoca Concrete Poles INC. | Moca | 20–99 | ◇ UNVERIFIED |