Most actively traded companies on the TSX, TSX Venture Exchange

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

Toronto Stock Exchange (14,583.11 up 52.20 points):

Bombardier Inc. (TSX:BBD.B). Transportation equipment. Up five cents, or 1.21 per cent, to $4.18 on 7.4 million shares.

Nautilus Minerals Inc. (TSX:NUS). Miner. Down 17 cents, or 25.37 per cent, to 50 cents on 7.2 million shares.

ProMetic Life Sciences Inc. (TSX:PLI). Biotechnology. Down three cents, or 3.06 per cent, to 95 cents on 5.3 million shares.

Suncor Energy Inc. (TSX:SU). Oil and gas. Up $1.26, or 3.05 per cent, to $42.60 on 4.9 million shares. The oilsands giant posted record operating earnings of $1.79 billion, or $1.22 per share, widely beating the average analyst estimated of 93 cents. Net earnings were nearly $1.49 billion, or $1.01 per share, up from $1.09 billion, or 72 cents per share a year earlier.

Twin Butte Energy Ltd. (TSX:TBE). Oil and gas. Unchanged at $2.37 on 4.8 million shares.

Fortis Inc. (TSX:FTS.IR). Utilities. Down 23 cents, or 0.64 per cent, to $35.77 on 4.4 million shares.

Toronto Venture Exchange (1,000.05 down 9.53 points):

Petroamerica Oil Corp. (TSXV:PTA). Oil and gas. Down half-a-cent, or 1.67 per cent, to 29.5 cents on 8.6 million shares.

Fission Uranium Corp. (TSXV:FCU). Miner. Down four cents, or 3.17 per cent, to $1.22 on 3.7 million shares.

Companies reporting major news:

Cameco Inc. (TSX:CCO). Miner. Down 86 cents, or 3.56 per cent, to $23.27 on 3.5 million shares. The uranium miner expects payments to the Canada Revenue Agency in its fight over the use of an offshore subsidiary to accelerate. Chief financial officer Grant Isaac said the total payments Cameco expects to make hasn't changed at between $625 million and $650 million, but the timing has been stepped up.

Encana Corp. (TSX:ECA). Oil and gas. Up 62 cents, or 2.47 per cent, to $25.68 on 36. million shares. The company said that it is selling some natural gas properties in Texas to an undisclosed purchaser for about $530 million as the Calgary company continues to pare its portfolio.

Quebecor Inc. (TSX:QBR.B). Telecom. Down 62 cents, or 2.33 per cent, to $26 on 357,075 shares. The Montreal-based company announced Monday that its president and chief executive, Robert Depatie, was retiring for health reasons.

TransAlta Corp. (TSX:TA). Utilities. Up 23 cents, or 1.76 per cent, to $13.31 on 1.6 million shares. The company reported net earnings of $49 million, or 18 cents per share, up $60 million from a net loss of $11 million, or four cents per share, in the same period last year. Revenues totalled $775 million, up from $540 million year-over-year.