Lista de empresas
| Name | Province | City |
|---|---|---|
| Atholville Mill - AV Group NB Inc. - Atholville Mill | Nuevo Brunswick | Atholville |
| Atikokan Generating Station - Ontario Power Generation Inc. | Ontario | Atikokan |
| Atikokan Sawmill - Produits forestiers Résolu | Ontario | Atikokan |
| ATLANTIC HARDCHROME - Atlantic Hardchrome Ltd. | Nueva Escocia | Dartmouth |
| Atlantic Minerals Limited - Atlantic Minerals Limited | Terranova y Labrador | Lower Cove |
| ATLANTIC TUBE & STEEL - Atlantic Tube & Steel Inc. | Ontario | Mississauga |
| Atlantic Wallboard - Atlantic Wallboard Limited | Nuevo Brunswick | Saint John |
| ATLAS # 1 - Atlas Fluid Systems Div.of Martinrea Inc. | Ontario | Brampton |
| Atlas Roofing Corporation - Atlas Roofing Corp. | Ontario | Etobicoke |
| Atlas Tube Harrow - Atlas Tube Canada ULC | Ontario | Harrow |
