** Shares of Canada-based MEG Energy MEG.TO gains 4.3% to C$30.09
** Cenovus Energy CVE.TO says it has further sweetened its bid for MEG, winning long-sought backing from MEG's largest shareholder, Strathcona Resources SCR.TO
** Its current bid stands at C$30 per share, up from last month's sweetened offer of C$29.79
** Shareholder vote on the transaction is expected to be on October 30
** Separately, Jefferies raises MEG's price target to C$30 from C$24
** Including session's moves, MEG shares up 27.3% YTD
(Reporting by Sumit Saha in Bengaluru)
((Sumit.Saha@thomsonreuters.com;))