Some of the most active companies traded Friday on the Toronto Stock Exchange:

Toronto Stock Exchange (13,522.00, up 142.86 points):

Data Group Ltd. (TSX:DGI). Business services. Up one cent, or 66.67 per cent, to 2.5 cents on 21.1 million shares.

Niko Resources Ltd. (TSX:NKO). Oil and gas. Up 13.5 cents, or 93.10 per cent, to 28 cents on 14.5 million shares.

Baytex Energy Corp. (TSX:BTE). Oil and gas. Up 24 cents, or 5.04 per cent, to $5 on 10.3 million shares.

First Quantum Minerals Ltd. (TSX:FM). Miner. Up 28 cents, or 3.95 per cent, to $7.37 on 9.3 million shares.

Encana Corp. (TSX:ECA). Oil and gas. Up 35 cents, or 4.94 per cent, to $7.44 on eight million shares.

Rubicon Minerals Corp. (TSX:RMX). Miner. Down 2.5 cents, or 19.23 per cent, to 10.5 cents on 7.5 million shares.

Companies reporting major news:

Imperial Oil Ltd. (TSX:IMO). Oil and gas. Up 85 cents, or 1.95 per cent, to $44.40 on 748,168 shares. Imperial Oil is seeking approval for a new, $2-billion oilsands project on its Cold Lake lease area in northeastern Alberta. The company says it has filed the regulatory paperwork with the Alberta Energy Regulator for the Cold Lake Expansion project, but Imperial spokeswoman Lisa Schmidt said development will depend on regulatory, market and other conditions.