Guzzi62, you are apparently confused. The question is not who owns Advent Bioservices. Advent Bioservices is a privately-owned company.
The question is: ”Who owns the Sawston Facility”,
The Sawston Facility is owned by Northwest Biotherapeutics (NWBio). Advent is a privately-owned CDMO hired by NWBio to operate the Sawston Facility and to manufacture DCVax vaccines.
The value is in the Sawston Facility, not Advent Bioservices.
Market Data 
Markets 
AI
