Grit­stone’s top-of-the-range IPO brings week’s biotech Nas­daq tal­ly to $520M

Grit­stone On­col­o­gy joined the fes­tiv­i­ties on Nas­daq overnight, reap­ing a $100 mil­lion wind­fall af­ter up­siz­ing its batch of shares and pric­ing its IPO on the high end of the range.

Mov­ing in be­hind a slate of 3 suc­cess­ful IPOs ear­li­er in the week, Grit­stone sold 6.67 mil­lion shares at $15 each — the top of the range — and will start trad­ing to­day un­der the $GRTS sym­bol. Added all up, 5 biotechs have raised $520 mil­lion this week, with En­ta­sis start­ing the round with a very weak de­but on Nas­daq.

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