Nexen Inc. is an independent global energy company listed on the Toronto and New York stock exchanges. One of Canada's largest oil and natural gas producers, Nexen has approximately 3,000 employees worldwide and produces some 250,000 barrels of oil equivalent on a daily basis.
OPTI Canada Inc. was created in 1999 to develop integrated bitumen and heavy oil projects using its proprietary OrCrude upgrading technology. The company is based in Calgary and is listed on the Toronto Stock Exchange." – less–ZoomInfo