Most actively traded companies on the TSX

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

Toronto Stock Exchange (12,922.47, down 120.36 points):

First Quantum Minerals Ltd. (TSX:FM). Miner. Down one cent, or 0.23 per cent, to $4.40 on 7.1 million shares.

Baytex Energy Corp. (TSX:BTE). Oil and gas. Down 12 cents, or 2.73 per cent, to $4.27 on 5.7 million shares.

Enbridge Inc. (TSX:ENB). Oil and gas. Down six cents, or 0.14 per cent, to $41.86 on 5.2 million shares.

Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Down three cents, or 2.54 per cent, to $1.15 on five million shares.

Penn West Petroleum Ltd. (TSX:PWT). Oil and gas. Up two cents, or 1.89 per cent, to $1.08 on 4.2 million shares.

OceanaGold Corp. (OGC). Miner. Up two cents, or 0.83 per cent, to $2.43 on 4.2 million shares.

Companies reporting major news:

Canadian Pacific Railway (TSX:CP). Transportation. Down $4.47, or 2.54 per cent, to $171.64 on 555,920 shares. The Calgary-based company has enlisted the help of activist U.S. investor Bill Ackman to challenge the qualifications of Norfolk Southern CEO James Squires and opened the door to a possible hostile bid if the board of the Virginia-based railway continues to oppose negotiations.