Most actively traded companies on the TSX

Some of the most active companies traded Wednesday on the Toronto Stock Exchange:

Toronto Stock Exchange (15,170.13, down 209.62 points):

B2Gold Corp. (TSX:BTO). Miner. Down 11 cents, or 2.99 per cent, to $3.57 on 9.5 million shares.

Aimia Inc. (TSX:AIM). Loyalty programs. Down 56 cents, or 26.79 per cent, to $1.53 on 9.3 million shares. The Montreal-based company is immediately suspending all dividends on common and preferred shares, including previously declared payments that were to be made at the end of this month. Aimia runs Aeroplan and other customer reward programs for various businesses including Air Canada (TSX:AC), its original customer.

Kinross Gold Corp. (TSX:K). Miner. Down 17 cents, or 3.02 per cent, to $5.46 on 7.5 million shares.

Cenovus Energy Inc. (TSX:CVE). Oil and gas. Down 48 cents, or 4.20 per cent, to $10.95 on 7.2 million shares.

Iamgold Corp. (TSX:IMG). Miner. Down 54 cents, or 7.52 per cent, to $6.64 on 6.68 million shares.

Yamana Gold Inc. (TSX:YRI). Miner. Down three cents, or 0.90 per cent, to $3.32 on 6.67 million shares.

Companies reporting major news:

Canadian National Railway (TSX:CNR). Transportation. Down 86 cents, or 0.82 per cent, to $104.46 on 1.7 million shares. The country’s largest railway says it will spend $500 million over the next five years on technology to improve its safety and efficiency while also helping to face the potential challenge of driverless trucks. Chief executive Luc Jobin told an investor conference Wednesday that CN will make the investments to improve its own operations and stay ahead of changes to the trucking sector that will evolve quickly over the next decade.

Norsat International Inc. (TSX:NII). Technology. Down 15 cents, or 0.99 per cent, to $15 on 47,079 shares. The Vancouver technology company, which is subject to a controversial takeover bid from a Chinese firm, says it may accept a better offer from an American investment fund. Norsat says the deal from Privet Fund Management LLC values it at US$67.3 million, which is slightly above the deal proposed by Hytera Communications.

TransCanada Corp. (TSX:TRP). Oil and gas. Down $1.26 cents, or 1.97 per cent, to $62.60 on 2.9 million shares. The Calgary-based company says it plans to invest $2 billion to expand its Nova natural gas pipeline system, as it looks to transport more of the fuel from prolific Western Canadian fields. TransCanada says the proposed expansion is a response to demand from producers operating in the Montney, Duvernay and Deep Basin formations which straddle or are near the B.C.-Alberta boundary. It said many producers are looking to ship to markets in the Pacific Northwest, California and Nevada.