Prothena Corporation plc
Prothena Corporation plc (PRTA) Market Cap & Net Worth
Live market cap, enterprise value, and global rank — multi-year chart and annual table below.
prta · market cap & enterprise value · FMP · as of Jun 8, 2026
Core market cap & key metrics
As of Jun 8, 2026, Prothena Corporation plc (PRTA) has a market cap — also referred to as its net worth or valuation — of $448,143,709, making it one of the top most valuable companies globally. Market Cap = $8.56 × shares outstanding.
Market cap history — by year
* 2026 = year-to-date · Year-end market cap · Source: FMP
Market cap by year
Compared to Peers
View Healthcare sectorAbout Market Cap, Net Worth & Valuation
Prothena Corporation plc (PRTA) has a market cap — also referred to as its net worth or valuation — of $448,143,709 as of Jun 8, 2026, making it the #0 most valuable company globally. Market Cap = Stock Price × Shares Outstanding.
Prothena Corporation plc reached its all-time high market cap of $4.7B on Sep 23, 2021. Comparing the Prothena Corporation plc market cap history illustrates one of the most extraordinary corporate growth stories.
Investors frequently compare Prothena Corporation plc net worth vs peers and ask how Prothena Corporation plc valuation compares to other countries. Its market cap reflects continued investor confidence.
Frequently Asked Questions
PRTA market cap · 6 questionsProthena Corporation plc's net worth — measured as market capitalization — is $448,143,709 as of Jun 8, 2026. It ranks #0 globally. Market Cap = $$8.56 (price) × shares outstanding.