** Blueprint Medicines BPMC.O jumps 27.03% to $128.74 premarket
** French drugmaker Sanofi SASY.PA to buy Blueprint for more than $9 billion
** Sanofi paying $129/share in cash for Blueprint, a 27% premium to last close
** Deal's equity value ~$9.1 billion, with potential to increase to $9.5 billion, including contingent value rights
** Acquisition expected to be finalized in Q3 2025
** BPMC up 16.2% this year, as of last close
(Reporting by Sriparna Roy in Bengaluru)
((Sriparna.Roy@thomsonreuters.com;))