** Shares of software company Bigtincan Holdings BTH.AX
rise as much as 30% to A$0.650 - their highest since Dec. 6
** Co confirms it has received a confidential, non-binding,
indicative offer from Siris Capital Group at an indicative offer
price of A$0.80 per share
** Offer price represents a 60% premium to BTH's last
closing price
** Says it does not consider it to be in best interests of
shareholders to progress with Siris proposal at this time
** Trading volumes 2.2 times the 30-day average of 754,146
shares
** As of last close, stock down 5.7% this year
(Reporting by Himanshi Akhand in Bengaluru)
((Himanshi.Akhand@thomsonreuters.com;))