GSK bags Tesaro for $5B as it leaps back in­to com­mer­cial on­col­o­gy and beefs up can­cer drug pipeline

Glax­o­SmithK­line has struck a deal to buy Tesaro $TSRO in a $5.1 bil­lion deal that will vault the phar­ma gi­ant in­to the com­mer­cial on­col­o­gy mar­ket as it stakes out a big new role for it­self in the boom­ing can­cer field.

Long dis­cussed af­ter Tesaro man­age­ment put out the word on sev­er­al oc­ca­sions in the past year that it was look­ing to sell the com­pa­ny and its PARP in­hibitor Ze­ju­la, GSK is pay­ing $75 a share, trig­ger­ing an in­stant 60% spike in the stock this morn­ing as in­vestors caught up to the news to­day.

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