The Canadian Press Companies reporting major news:Barrick Gold (TSX:ABX). Barrick made a hostile takeover bid for rival Newmont Mining Corp. in an all-stock deal that would combine two of the world’s largest gold producers. The Toronto-based Barrick says its shareholders would own 55.9 per cent of the combined company and the rest would be owned by shareholders of the Colorado-based Newmont.Aimia Inc. (TSX:AIM) Down three cents, or 0.8 per cent, to $3.72 on 203,312 shares. The loyalty program owner says it expects to pay a bill of about $30 million plus another $5 million in interest following an audit by the Canada Revenue Agency. The Montreal-based company says CRA has concluded its audit and a re-assessment is expected. Some of the most active companies traded Monday on the Toronto Stock Exchange:Toronto Stock Exchange (16,057.03, up 44.02 points)GeneNews Ltd. (TSX:GEN) Pharma. Up 4.5 cents, or 64.29 per cent, to 11.5 cents on 14.7 million shares.Nemaska Lithium Inc. (TSX:NMX). Materials. Up six cents, or 17.14 per cent, to 41 cents on 12.5 million shares.Encana Corp. (TSX:ECA). Energy. Up 22 cents, or 2.43 per cent, to $9.29 on 10.9 million shares.Bombardier Inc. (TSX:BBD.B). Industrials. Unchanged on 10.5 million shares.Aurora Cannabis Inc. (TSX:ACB). Health care. Up 4.5 cents, or 4.92 per cent, to $9.59 on 9.8 million shares.Barrick Gold Corp. (TSX:ABX) Down 53 cents, or 3.09 per cent, to $16.60 on eight million shares.