Upstream Bio, Inc. (NASDAQ:UPB) plunged 39.6% in today's trading, closing at $16.79.
The Healthcare stock traded 2,422,795 shares, 5.5x its average daily volume of 437,049 shares.
Upstream Bio, Inc. has a market capitalization of $1.5B. The stock has gained 0.0% year-to-date.