** Shares of Bigtincan Holdings BTH.AX rise as much as 25%
to A$0.2, their highest levels since Feb 28
** The software firm says it has received a buyout proposal
from a NASDAQ-listed special purpose acquisition company (SPAC)
** Co says the implied equity value of the proposal is $275
mln, or A$0.47 per BTH share, reflecting a premium of 193% to
BTH's last closing price
** BTH says if the proposal is implemented, it would list on
Nasdaq, and delist from Australia
(Reporting by Ayushman Ojha in Bengaluru)
((Ayushman.ojha@thomsonreuters.com;))