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

Toronto Stock Exchange (12,046.28 up 5.88 points):

Research In Motion Ltd. (TSX:RIM). Wireless technology. Up 11 cents, or 1.15 per cent, at $9.70 on 6,770,443 shares. A prominent tech analyst gave the BlackBerry 10 operating system a 20 per cent to 30 per cent probability of success, an improvement on his previous assessment. Peter Misek of New York-based Jeffries & Company attributed the change in opinion to surprisingly strong support among some wireless carriers.

Poseidon Concepts Corp. (TSX:PSN). Fluid handler. Up 29 cents, or 5.09 per cent, at $5.99 on 5,450,506 shares.

VoodooVox Inc. (TSX:VVX). Mobile search and advertising. Unchanged at 0.5 cent at 5,284,891 shares.

Bombardier Inc. (TSX:BBD.B). Transportation equipment. Down five cents, or 1.60 per cent, at $3.08 on 5,083,837 shares.

Algonquin Power and Utilities Corp. (TSX:AQN). Renewable energy. Down 29 cents, or 4.21 per cent, at $6.60 on 4,947,118 shares.

Viterra Inc. (TSX:VT). Grain handler. Down 24 cents, or 1.52 per cent, at $15.51 on 4,421,689 shares.

TSX Venture Exchange (1,242.30 down 7.66 points):

Novus Energy Inc. (TSXV:NVS). Oil and gas. Up nine cents, or 10.23 per cent, at 97 cents on 4,324,333 shares.

Raging River Exploration Inc. (TSXV:RRX). Oil and gas exploration. Down 15 cents, or 5.49 per cent, at $2.58 on 3,527,253 shares.

Companies reporting major news:

Canadian Satellite Radio Holdings Inc. (TSX:XSR). Satellite radio. Up 90 cents, or 18.37 per cent, at $5.80 on 1,112,580 shares. The parent company of Sirius XM Radio closed at its highest level in five years a day after announcing that it would pay a special cash dividend and begin paying a quarterly dividend.

George Weston Ltd. (TSX:WN). Grocer. Down 66 cents, or 1.03 per cent, at $63.40 on 138,267 shares. The bakery and grocery company's stock slid on news that its third-quarter earnings fell nearly 40 per cent and its Loblaws grocery division is cutting hundreds of jobs. Despite the news, Weston is increasing its dividend by about 5.6 per cent.

Progress Energy Resources Corp. (TSX:PRQ). Oil and gas. Down five cents, or 0.25 per cent, at $20 on 1,370,276. The Malaysian state-owned oil company trying to buy Progress Energy made a new proposal to Ottawa in hopes of winning approval for the $6-billion deal under the Investment Canada Act.