Your milestone figure includes $287M of clinical/regulatory milestones pertaining to non-HCV indications (presumably HBV) and $285M of sales-based milestones. It’s unlikely, IMO, that BMY would ever have had to pay ZGEN all of the latter or any of the former.
oh..i didnt know that..i jsut saw that shareholder would get a bit over 9 bucks for each share..almost double from here. I see they moved up the bid and ask to the 9s.