Johnathan,
Considering that UBS sold most of its Momenta stock last quarter I'll guess it'll hold some of it's 3.2 million purchase.
Considering that these guys committed to buying @ $13.56 per share they'll just be happy dumping these shares on the open market while making over a dollar per share.
UBS Securities LLC 3,200,000
Cowen and Company, LLC 500,000
Canaccord Genuity Inc. 300,000