The Canadian Press Some of the most active companies traded Monday on the Toronto Stock Exchange:Toronto Stock Exchange (16,577.28, down 35.53 points).Prometic Life Sciences. Inc. (TSX:PLI). Health care. Up one cent, or 20 per cent, to six cents on 8.1 million shares.Baytex Energy Corp. (TSX:BTE). Energy. Up 19 cents, or 6.79 per cent, to $2.99 on 7.7 million shares.Aurora Cannabis Inc. (TSX:ACB). Health care. Up 29 cents, or 2.41 per cent, to $12.32 on 7.1 million shares.Crescent Point Energy Corp. (TSX:CPG). Energy. Up 41 cents, or 7.48 per cent, to $5.89 on 6.7 million shares.Encana Corp. (TSX:ECA). Up 28 cents, or 2.89 per cent, to $9.98 on 6.2 million shares.Hexo Corp. (TSX:HEXO). Health care. Up 42 cents, or 4.67 per cent, to $9.41 on 5.2 million shares.Companies reporting:Guyana Goldfields Inc. (TSX:GUY). Unchanged at 92 cents. A group of dissident investors says they’re prepared to begin a court proceeding to recoup damages if Guyana Goldfields Inc. doesn’t initiate legal action against chief executive Scott Caldwell by Wednesday. The dissident group’s letter says it has previously asked the board to “fully investigate” allegations of misconduct that were communicated to the current directors last year and as recently as March 22. The group is led by Guyana Goldfields founder Patrick Sheridan, who was ousted as the Toronto-based company’s executive chairman last year. CannTrust Holdings Inc. (TSX:TRST). Up 10 cents to $9.52. CannTrust Holdings Inc. says the company’s net revenue for its first full quarter after legalization of recreational cannabis will be $17 million, more than double what it was a year earlier. The cannabis producer says it hasn’t finalized its results for the quarter ended March 31 but preliminary estimates show net revenue will be up 116 per cent from $7.8 million in last year’s first quarter. CannTrust says it harvested 9,424 kilograms of cannabis from its Niagara operations, up 96 per cent from the fourth quarter and that pricing for dry cannabis and oils was stable.