Prothena

Forecast & Rating6 analysts currently cover Prothena, with about 50.0% giving a positive rating — meaning they expect the stock to rise. The average price target is $21.40, about 126.5% upside from the current price of $9.45. Price targets range from $8.00 to $36.00 — a wide spread, showing clear disagreement over just how much Prothena can rise. Historically, about 35.5% of past price targets were eventually met, which adds credibility. For you, this means institutional views on Prothena are split — bulls and bears coexist, so you'll need to weigh it against your own judgment. Data as of Aug 14, 2026; for reference only and not investment advice.