The Toronto Stock Exchange shut down early Friday because of a technical problem. Here are some of the most active companies traded on the exchange as of 1:37 p.m. ET:

Toronto Stock Exchange (15,668.93, up 31.34 points)

Detour Gold Corp. (TSX:DGC). Miner. Down $4.35, or 30.21 per cent, to $10.05 on 7.6 million shares.

Baytex Energy Corp. (TSX:BTE). Oil and gas. Down 15 cents, or 2.63 per cent, to $5.55 on 5.9 million shares.

Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Down three cents, or 0.75 per cent, to $3.99 on 4.8 million shares.

Aurora Cannabis Inc. (TSX:ACB). Healthcare. Down seven cents, or 0.91 per cent, to $7.65 on 4.3 million shares.

Potash Ridge Corp. (TSX:PRK). Miner. Up two cents, or 23.53 per cent, to 10.5 cents on 3.6 million shares.

Precision Drilling Corp. (TSX:PD). Oil and gas. Up seven cents, or 1.59 per cent, to $4.46 on 3.5 million shares.

Companies reporting major news:

Cameco Corp. (TSX:CCO). Miner. Up 27 cents, or 2.08 per cent, to $13.22 on 1.4 million shares. The uranium miner reported a first quarter profit compared with a loss a year ago as it was helped by a restructuring of its Kazakh joint venture and higher uranium prices and sales. The Saskatoon-based company says it earned $55 million (14 cents per share) compared with a loss of $14 million (five cents per share) a year ago.