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

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

Toronto Stock Exchange (12,178.38 up 49.27 points):

Potash Corporation of Saskatchewan Inc. (TSX:POT). Fertilizer and feed products. Down 28 cents, or 0.70 per cent, at $39.84 on 19.32 million shares.

BlackBerry (TSX:BB). Wireless technology. Down 86 cents, or 7.76 per cent, at $10.22 on 6.36 million shares. The smartphone maker disappointed analysts on its first-quarter results released late last week and CEO Thorsten Heins warned of further losses in the next quarter. However, a National Bank financial analyst continued to rate the stock "Underperform" on Monday.

Barrick Gold Corp. (TSX:ABX). Miner. Down $1.28, or 7.71 per cent, at $15.32 on 5.59 million shares. The gold sector led the decliners at 165.40 points, down five points or 2.93 per cent as the price of gold fell US$12.30 to $1,243.40 per ounce.

Resverlogix Corp. (TSX:RVX). Biotechnology. Up 35 cents, or 152.17 per cent, at 58 cents on 5.42 million shares.

Iamgold Corp. (TSX:IMG). Miner. Down 18 cents, or 4.07 per cent, at $4.24 on 5.16 million shares.

B2Gold Corp. (TSX:BTO). Miner. Up six cents, or 2.68 per cent, at $2.30 on 4.88 million shares.

Toronto Venture Exchange (876.99 down 4.41 points):

AQM Copper Inc. (TSXV:AQM). Mine explorer. Up four cents, or 114.29 per cent, at $7.5 cents on 3.28 million shares. Mitsubishi Materials Corp. agreed to invest US$22.6 million into AQM's wholly owned Peruvian subsidiary Minera AQMCopper Peru. It also committed an additional US$15.07 million for an indirect interest of 20 per cent in the Vancouver-based explorer's project in southern Peru, which it co-owns with Teck Resources (TSX:TCK.B).

Symbility Solutions Inc. (TSXV:SY). Cloud computing. Down a penny, or 2.50 per cent, at 39 cents on 3.01 million shares. The Toronto-based company reached an agreement to buy all of Decision Insight Information Group's indirect ownership interest in 61.4 million common shares of Symbility Solutions.

Companies reporting major news:

Fortress Paper (TSX:FTP). Pulp and paper. Down 24 cents, or 3.91 per cent, at $5.90 on 8,684 shares. The company said an unexpected mechanical water pump failure will further delay the startup of a cogeneration facility at its specialty cellulose mill in Quebec. The hitch means the cogeneration facility wasn't completed by the end of June as expected.

Paladin Labs Inc. (TSX:PLB). Specialty pharmaceutical company. Up $1.32, or 2.46 per cent, at $54.94 on 11,486 shares after announcing it is buying antibiotic Binotal from German pharmaceutical company Bayer. The acquisition will help the Montreal-based company extend its reach to the Latin American region which commonly uses the antibiotic treatment.