Guanica Centrale | Ensenada | PR |
Guanica Mill | Ensenada | PR |
Gustavo Mourraille Central Porto Real | Vieques | PR |
Industrial Siderurgica | Bayamon | PR |
Jaime Federico Calaf Colazo | Manati | PR |
Juan Maria Garcia | San Juan | PR |
Juncos Central | San Juan | PR |
Juncos Central | Humacao | PR |
Loiza Sugar | Loiza | PR |
Loiza Sugar | San Juan | PR |
Luvi Trucking | San Juan | PR |
Machete Central Sugar | Guayama | PR |
Manati Sugar | Manati | PR |
Marcus Mason | Arecibo | PR |
Mario Mercado E Hijos | Guayanilla | PR |
Mayaguez Light & Ice | Mayaguez | PR |
McMurtrie Guiler | San Juan | PR |
Melchior Armstrong & Dessau | San Juan | PR |
Mohasco Industries | Mayaguez | PR |
Montreal Engineering | Santurce | PR |
Neptune Packing | Mayaguez | PR |
New Corsica Central | Mayaguez | PR |
North Brothers | Guayama | PR |
Open Connectivity Foundation | San Juan | PR |
Oswaldo Berrayarza | San Juan | PR |
Palo Seco Power Plant | Palo Seco | PR |
Pan Atlantic Steamship | Ponce | PR |
Petroleum Chemical | San Juan | PR |
Pfizer | Barceloneta | PR |
Phillips Puerto Rico Core | Guayama | PR |
Pittsburgh Plate Glass | Guayanilla | PR |
Plata Sugar | San Juan | PR |
Plato Sugar | Aguadilla | PR |
Ponce Electric | Ponce | PR |
Ponce Hotel | Ponce | PR |
Ponce Railway & Light | Ponce | PR |
Portilla | San Juan | PR |
Porto Rico Railway Light & Power | San Juan | PR |
PPG Industries | Ponce | PR |
PROCON | Santurce | PR |
P. R. Water Resources Authority | San Juan | PR |
Puerto Rico Cement | San Juan | PR |
Puerto Rico Chemical | Arecibo | PR |
Puerto Rico Development | San Juan | PR |
Puerto Rico Distilling | Arecibo | PR |
Puerto Rico Electric Power Authority | Ponce | PR |
Puerto Rico Electric Power Authority | Guayanilla | PR |
Puerto Rico Medical Center | Rio Piedras | PR |
Puerto Rico Olefins | Ponce | PR |
Puerto Rico Pulp & Paper | San Juan | PR |