Some of the most active companies traded Monday on the Toronto Stock Exchange:Toronto Stock Exchange (15,143.87, up 15.22 points):Katanga Mining Ltd. (TSX:KAT). Miner. Down 21 cents, or 28.38 per cent, to 53 cents on 7.5 million shares.B2Gold Corp. (TSX:BTO). Miner. Down 23 cents, or 6.85 per cent, to $3.13 on 7.2 million shares.Aimia Inc. (TSX:AIM). Loyalty programs. Down eight cents, or 5.23 per cent, to $1.45 on 7.097 million shares.Kinross Gold Corp. (TSX:K). Miner. Down 10 cents, or 1.91 per cent, to $5.14 on 7.094 million shares.BNK Petroleum Inc. (TSX:BKX). Oil and gas. Up 7.5 cents, or 36.59 per cent, to 28 cents on 4.7 million shares.Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Down one cent, or 0.40 per cent, to $2.51 on 3.5 million shares.Companies reporting major news:Spin Master Corp. (TSX:TOY). Game manufacturer. Up 18 cents, or 0.47 per cent, to $38.22 on 33,044 shares. The Toronto-based toymaker acquired Aerobie Inc., a maker of outdoor flying discs and other sports toys. Financial terms of the deal, which closed Friday, were not immediately available.