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

Toronto Stock Exchange (12,757.35 up 9.48 points):

BlackBerry (TSX:BB). Wireless technology. Down $1.33, or 8.05 per cent, at $15.19 on 15.27 million shares. The information technology sector led the losers on the main index, falling 2.80 per cent to 29.87 points. The company’s new Z10 touchscreen smartphone debuted in the United States, more than six weeks after the company launched the devices elsewhere.

Eastern Platinum Ltd. (TSX:ELR). Miner. Down half a cent, or 3.23 per cent, at 15 cents on 12.28 million shares.

Bombardier Inc. (TSX:BBD.B). Transportation equipment. Down 12 cents, or 2.87 per cent, at $4.06 on 6.58 million shares.

CanElson Drilling Inc. (TSX:CDI). Contract drilling. Up 18 cents, or 3.88 per cent, at $4.82 on 3.94 million shares.

First Quantum Minerals Ltd. (TSX:FM). Miner. Down 48 cents, or 2.33 per cent, at $20.12 on 3.41 million shares. The Vancouver-based company said 85.5 per cent of Inmet Mining’s (TSX:IMN) common stock was tendered to its $5.1-billion takeover offer by this week’s deadline. The offer will remain open to the remaining shareholders until April 1.

Excellon Resources Inc. (TSX:EXN). Miner. Unchanged at 46 cents on 3.28 million shares.

Toronto Venture Exchange (1,106.35 up 3.37 points):

Eacom Timber Corp. (TSXV:ETR). Timber producer. Up 11 cents, or 42.31 per cent, at 37 cents on 42.04 million shares. The Montreal-based company received a friendly takeover offer from Kelso & Co. The cash offer values the mill operator’s equity at $181.8 million.

Sterling Resources Ltd. (TSXV:SLG). Oil and gas. Up a penny, or 1.23 per cent, at 82 cents on 7.87 million shares.

Companies reporting major news:

Canadian National Railway Co. (TSX:CNR). Railway. Up 66 cents, or 0.67 per cent, at $99.50 on 805,524 shares. The country’s biggest railway company sold a portion of rail line west of Toronto to Metrolinx for $52.5 million. CN will continue to operate freight trains over the rail line, which is mainly used by commuter trains operated by GO Transit.

Domtar Corp. (TSX:UFS). Paper producer. Up 18 cents, or 0.23 per cent, at $79.55 on 8,119 shares. The paper giant is acquiring Xerox’s paper and print media products business in Canada and the United States for an undisclosed sum.

Stella-Jones (TSX:SJ). Railway tiles and utility pole maker. Down 71 cents, or 0.88 per cent, at $80.01 on 13,362 shares. The Quebec-based wood products manufacturer is increasing its quarterly dividend by 25 per cent following record annual sales and profits last year and the prospects of benefiting from a North American recovery in 2013.