Lista de empresas
| Name | Province | City | |
|---|---|---|---|
| Onward Heavy Oil MWB 03-11-034-24W3 - Baytex Energy Ltd | Saskatchewan | Kerrobert | |
| Onward Viking Oil MWB 04-16-034-24W3 - Baytex Energy Ltd | Saskatchewan | Superb | |
| Onward Viking Oil MWB 08-27-034-24W3 - Baytex Energy Ltd | Saskatchewan | Luseland | |
| Onward Viking Oil MWB 16-15-034-24W3 - Baytex Energy Ltd | Saskatchewan | Superb | |
| Onward Viking Oil SWB 13-09-034-24W3 - Baytex Energy Ltd | Saskatchewan | Superb | |
| Open Creek 7-34-42-5w5 - HARVEST OPERATIONS CORP. | Alberta | Willesden Green | |
| Open Die Plant - Canada Forgings Inc. | Ontario | Welland | |
| Opérations de Drummondville - Siemens Energie Canada Limitée | Quebec | Drummondville | |
| OPINAC BYEMOOR 3-32 - PERSIST OIL & GAS INC. | Alberta | Stonelaw | |
| OPP GHQ Firing Range - Ontario Provincial Police | Ontario | Orillia |
