Dictionary

Bookrunner

The main underwriter or lead manager in the issuance of new equity, debt or securities instrument. In investment banking, the bookrunner is the underwriting form that “runs,” or who is in charge of the books. More then one bookrunner can manage a security issuance, in which case the involved parties are called “joint bookrunners.”

 

Wikipedia: https://en.wikipedia.org/wiki/Bookrunner