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 155.1% upside from the current price of $8.39. Price targets range from $8.00 to $36.00 — a wide spread, showing clear disagreement over just how much Prothena can rise. Historically, about 36.1% 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 Jul 27, 2026; for reference only and not investment advice.