** Satellite telecom firm Globalstar's shares GSAT.O jump 12% to $76.8 premarket on takeover by Amazon AMZN.O report
** AMZN in talks to acquire GSAT to build low-earth-orbit network competing with SpaceX's Starlink - Financial Times on Wednesday
** Companies still negotiating deal complexities after lengthy talks - FT
** GSAT did not immediately respond to Reuters' request for comment, AMZN declined to comment
** Amazon's network would be closest rival to Musk's Starlink, which operates 9,500 satellites
** News comes as SpaceX confidentially filed for U.S. IPO, potentially biggest stock listing ever
** Four analysts rate GSAT "buy" on average; median PT is $70.5 - data compiled by LSEG
** As of last close, stock up 12.27% YTD
(Reporting by Kanishka Ajmera in Bengaluru)
((mail to: Kanishka.Ajmera@thomsonreuters.com))