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

Toronto Stock Exchange (14,796.06, up 21.02 points):

Jaguar Mining Inc. (TSX:JAG). Miner. Down one cent, or 1.23 per cent, to 80 cents on 12.9 million shares.

Emera Inc. (TSX:EMA). Utilities. Up 11 cents, or 0.22 per cent, to $49.05 on 7.4 million shares.

B2Gold Corp. (TSX:BTO). Miner. Down 12 cents, or 2.59 per cent, to $4.52 on 6.3 million shares.

Baytex Energy Corp. (TSX:BTE). Oil and gas. Up 28 cents, or 4.47 per cent, to $6.54 on 6.1 million shares.

Encana Corp. (TSX:ECA). Oil and gas. Up 63 cents, or 5.60 per cent, to $11.88 on 5.1 million shares.

Yamana Gold Inc. (TSX:YRI). Miner. Down 10 cents, or 1.34 per cent, to $7.37 on 4.9 million shares.

Companies reporting major news:

Valeant Pharmaceuticals International Inc. (TSX:VRX). Pharmaceutical. Down $3.99, or 11.16 per cent, to $31.76 on 1.9 million shares. Valeant says it is co-operating with authorities after a media report said it is under investigation by the U.S. Attorney’s office trying to determine whether its activities with a mail-order pharmacy were fraudulent. Word of the investigation is the latest setback for the Quebec-based drug giant.