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

Toronto Stock Exchange (13,993.88, down 43.66 points):

Penn West Petroleum Ltd. (TSX:PWT). Oil and gas. Up 45 cents, or 38.79 per cent, to $1.61 on 16.7 million shares.

Torex Gold Resources Inc. (TSX:TXG). Miner. Down five cents, or 2.17 per cent, to $2.25 on 15.8 million shares.

Baytex Energy Corp. (TSX:BTE). Oil and gas. Down 15 cents, or 1.95 per cent, to $7.56 on 8.3 million shares.

Yamana Gold Inc. (TSX:YRI). Miner. Down 12 cents, or 1.89 per cent, to $6.24 on 6.8 million shares.

Kinross Gold Corp. (TSX:K). Miner. Unchanged at $6.60 on six million shares.

B2Gold Corp. (TSX:BTO). Miner. Up 14 cents, or 5.28 per cent, to $2.79 on 5.8 million shares.

Companies reporting major news:

TransCanada Corp. (TSX:TRP). Oil and gas. Up 22 cents, or 0.40 per cent, to $54.86 on 1.3 million shares. TransCanada Corp. and a joint venture partner have won a contract to build, own and operate a US$2.1-billion natural gas pipeline in Mexico. The Calgary-based company says it will develop the 800-kilometre Sur de Texas-Tuxpan pipeline in co-operation with IEnova, a subsidiary of California-based Sempra Energy.