As of June 2026 Prothena has a market cap of NZ$0.71 Billion. This makes Prothena the world's 7581th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Jun 10th, 2026 the market cap of Prothena was reported to be: