TORONTO - Some of the most active companies traded Wednesday on the Toronto Stock Exchange and the TSX Venture Exchange: Toronto Stock Exchange (12,268.29 down 99.17 points): Bombardier Inc. (TSX:BBD.B). Plane and train maker. Up seven cents, or 1.54 per cent, at $4.63 on 8.97 million shares. Bombardier won an order from Nigerian carrier Arik Air for seven commercial aircraft valued at US$297 million. B2Gold Corp. (TSX:BTO). Miner. Up a penny, or 0.42 per cent, at $2.41 on 7.36 million shares.

ExxonMobil subsidiary Imperial Oil announced Wednesday it will shutter its only oil refinery on Canada's Atlantic Coast after failing to find a buyer for the struggling century-old facility. The company noted a "very difficult business market" as the reason for its decision, adding in a statement: "Despite interest in the refinery assets over the past year, Imperial was unable to attract a buyer to continue operating the refinery." The facility began operations in 1918, refining as much as 88,000 barrels of oil per day, and employed some 400 people. amc/sg

MONTREAL - Convenience store operator Alimentation Couche-Tard is seen as a likely bidder to purchase retail assets from oil and gas giant Hess as it seeks to further boost its U.S. network, according to an industry analyst. Hess announced in May that it will exit its retail, energy marketing and energy trading businesses following pressure from its third-largest shareholder — activist investor Elliott Management — to break up the firm. It owns about 1,350 gasoline stations in 16 East Coast states.

TERRACE, B.C. - There is a growing imbalance between oil supply and delivery in Canada and doing nothing is not an option, the lawyer for the Canadian Association of Petroleum Producers told a federal panel weighing the Northern Gateway project. Keith Bergner told the review panel Tuesday that current pipeline capacity is not sufficient, and producers are finding themselves with product on their hands and no way to ship it to buyers — "shut-in" as it's known in the industry.