Most actively traded companies on the TSX, TSX Venture Exchange markets

TORONTO – Some of the most active companies traded Wednesday on the Toronto Stock Exchange and the TSX Venture Exchange:

Toronto Stock Exchange (12,461.24 up 53.55 points):

Westaim Corp. (TSX:WED). Insurance. Unchanged at 2.5 cents on 27,541,768 shares. The financial sector advanced 0.36 per cent to 183.52 points.

Celtic Exploration Ltd. (TSX:CLT). Oil and gas. Up $8.17, or 45.09 per cent, at $26.29 on 17,699,819 shares. The Calgary-based oil and gas explorer received a friendly takeover offer valued at $3.1 billion from Canadian affiliates of U.S. energy giant Exxon Mobil Corp. (NYSE:XOM). The total price includes debt and spending obligations that the buyers would assume.

Cequence Energy Ltd. (TSX:CQE). Oil and gas. Up 21 cents, or 11.86 per cent, at $1.98 on 6,411,016 shares. The energy sector led all the advancers, rising 1.43 per cent to 266.48 points. The November crude contract inched up three cents US to $92.12 per barrel on the New York Mercantile Exchange.

Viterra Inc. (TSX:VT). Grain handler. Down six cents, or 0.37 per cent, at $16.05 on 6,215,207 shares.

Perseus Mining Ltd. (TSX:PRU). Miner. Up three cents, or 1.08 per cent, at $2.80 on 5,833,525 shares. The metals and mining sector rose 1.40 per cent to 941.01 points.

Bombardier Inc. (TSX:BBD.B). Transportation equipment. Up six cents, or 1.61 per cent, at $3.79 on 4,604,160 shares.

TSX Venture Exchange (1,304 up 4.22 points):

Prodigy Gold Inc. (TSXV:PDG). Gold. Unchanged at $1 on 15,489,584 shares. The Vancouver-based company closed at its highest level in four years for a second day in a row. Toronto-based Argonaut Gold (TSX:AR) announced earlier in the week that it will acquire Prodigy for shares and cash in a friendly deal valued at $341 million.

Sintana Energy Inc. (TSXV:SNN). Oil and gas exploration. Up 1.5 cents, or 8.11 per cent, at 20 cents on 14,650,249 shares.

Companies reporting major news:

Penn West Petroleum Ltd. (TSX:PWT). Oil and gas. Up 19 cents, or 1.39 per cent, at $13.85 on 2,393,564 shares. The Calgary-based company agreed in principle to sell $1.3-billion worth of its non-core properties. Penn West will use funds from the sale to repay a portion of the money drawn on its credit facilities.

Potash Corporation of Saskatchewan (TSX:POT). Fertilizer. Up two cents, or 0.05 per cent, at $41.12 on 2,839,735 shares. Canada’s largest fertilizer producer said delayed sales in China and India will result in a 2012 profit miss. Earnings for the full financial year will fall below even the lowest previous estimate of $2.80 to $3.20 per share.