Biogen 1yr. And 5yr. stock price Gov. Capatial predicts Biogen 1yr. stock price at over $500.00 per share and the 5 year at over $2300.00 per share . They stated this is a 50 billion drug , yes Biogen is well structured compared to PMN and has numerous products and considerable less outstanding shares , but if this cash burning cow PMN ever gets a break maybe the $1.00 per share will appear for shareholders years down the road . But I also saw where it was stated PMN stock upside is virtually unlimited but again there's a lot of missing pieces in PMN's business plan .