** Shares of Australia's Insignia Financial IFL.AX gain up to 13.5% to A$4.835
** Stock hits highest since August 2021 and is set for its strongest trading session in two months
** Money manager says it received sweetened offers from both Bain Capital and CC Capital Partners, valuing the firm at A$3.34 billion ($2.11 billion)
** New offers from the firms come at A$5/shr; 8.7% higher over their previous A$4.60/shr bids
** Insignia grants due diligence for six weeks to both Bain Capital and CC
** Stock up 34.7% YTD
(Reporting by Rishav Chatterjee in Bengaluru)
((Rishav.Chatterjee@thomsonreuters.com;))