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 (12,521.02, up 8.61 points):

Grande Cache Coal Corp. (TSX:GCE). Miner. Up 43 cents, or 4.60 per cent, at $9.78 on 9,782,280 shares.

Aurora Oil & Gas Ltd. (TSX:AEF). Oil and gas. Up 14 cents, or 4.43 per cent, at $3.30 on 6,208,230 shares.

BioExx Specialty Proteins Ltd. (TSX:BXI). Life sciences. Up 9.5 cents, or 45.24 per cent, at 30.5 cents on 6,160,965 shares.

Bombardier Inc. (TSX:BBD.B). Transportation equipment. Up seven cents, or 1.47 per cent, at $4.82 on 5,140,540 shares.

Suncor Energy Inc. (TSX:SU). Oil and gas. Up nine cents, or 0.26 per cent, at $34.69 on 4,134,577 shares.

Manulife Financial Corp. (TSX:MFC). Insurer. Up two cents, or 0.17 per cent, at $12.11 on 3,928,494 shares.

TSX Venture Exchange (1,663.33, down 0.89 of a point):

Roxgold Inc. (TSXV:ROG). Miner. Down 15 cents, or 7.32 per cent, at $1.90 on 7,077,123 shares.

Madalena Ventures Inc. (TSXV:MVN). Oil and gas. Up 11 cents, or 9.57 per cent, at $1.26 on 6,757,147 shares.

Companies reporting major news:

WestJet (TSX:WJA). Airline. Up 55 cents, or 4.20 per cent, at $13.65 on 2,022,742 shares. The carrier confirmed it will launch a low-fare, no-frills regional airline, intensifying competition in smaller domestic markets with rival Air Canada for business and leisure class travellers.

Canadian Pacific Railway Ltd. (TSX:CP). Railway. Up 93 cents, or 1.23 per cent, at $76.53 on 1,657,117 shares. CP's current CEO is firing back at the shareholder seeking to oust him. In a memo to employees, Fred Green says Pershing Square Capital Management offers no plan or clear timetable to improve the railway's performance. Pershing Square hosted a town hall meeting in Toronto this week to outline why it wants to replace Green with Hunter Harrison, high-profile former CEO of rival Canadian National (TSX:CNR).