Most actively traded companies on the TSX

Some of the most active companies traded Friday on the Toronto Stock Exchange:Toronto Stock Exchange (16,531.04, up 42.84 points).Encana Corp. (TSX:ECA). Energy. Down 24 cents, or 4.15 per cent, to $5.54 on 7.7 million shares.CannTrust Holdings Inc. (TSX:TRST). Health care. Up 43 cents, or 16.67 per cent, to $3.10 on 6.4 million shares.Enbridge Inc. (TSX:ENB). Energy. Up seven cents, or 0.16 per cent, to $44.24 on 4.5 million shares.OceanaGold Corp. (TSX:OGC). Mining. Down four cents, or 1.1 per cent, to $3.60 on 4.4 million shares.Aphria Inc. (TSX:APHA). Health care. Down 47 cents, or 6.1 per cent, to $7.24 on 4.1 million shares.Hexo Corp. (TSX:HEXO). Health care. Down 13 cents, or 2.42 per cent, to $5.24 on 3.7 million shares.Companies in the news:CannTrust Holdings Inc. shares spiked as much as 20 per cent as investors took in news that the cannabis company’s chief executive officer had been fired amid an ongoing investigation into allegations it was illegally growing marijuana in unauthorized rooms. The company’s board of directors said Thursday night that it has decided to “terminate with cause” chief executive Peter Aceto and demanded company chair Eric Paul resign, which he did.Aecon Group Inc. (TSX:ARE). Construction. Up $1.89, or 9.59 per cent, to $21.59 on two million shares. The head of Aecon Group Inc. voiced his faith in fixed-price contracts after rival SNC-Lavalin Group Inc. signalled an abrupt retreat from the business this week in a move analysts say will work in Aecon’s favour. About 42 per cent of Aecon’s 2018 revenue derived from fixed-price contracts, under which companies have to eat any cost overruns. That share is set to expand, as nearly two-thirds of its backlog revenues are set to come from the so-called lump-sum, turnkey contracts.The Canadian Press read more