Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 251,897 |
| Open | 8.335 |
| Bid (Size) | 8.090 (300) |
| Ask (Size) | 8.120 (100) |
| Prev. Close | 8.360 |
| Today's Range | 7.910 - 8.370 |
| 52wk Range | 7.730 - 11.80 |
| Shares Outstanding | 45,047,449 |
| Dividend Yield | N/A |
Top News
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Performance
52-Week Range
31.3% below 52-week high
8.105
7.7352W Low
11.8052W High
1 Week
9.8% below 1-week high
8.071W Low
8.991W High
Prothena Corporation plc - Ordinary Shares (PRTA) traded between $7.73 and $11.80 over the past 52 weeks and last traded at $8.11, 31.3% below its 52-week high. Over the past week it ranged between $8.07 and $8.99.
Past 12 Months
1W
-$0.62
1M
-$1.71
3M
-$1.39
6M
-$1.93
YTD
-$1.09
1Y
-$1.75
PRTA was -17.8% over the past year, -19.3% over six months, -11.9% year to date, -7.1% in the last week.
12 Months vs Market
PRTA
-17.8%
DIA
+9.7%
SPY
+15.3%
QQQ
+24.1%
IWM
+14.8%
Over the past 12 months PRTA returned -17.8% versus DIA (Dow) +9.7%, SPY (S&P 500) +15.3%, QQQ (Nasdaq 100) +24.1% and IWM (Russell 2000) +14.8%.
Volume & Liquidity
0.53× 3-mo avg
Today 251,897
3-mo avg 473.5K
1W
571.8K
1M
496.8K
3M
473.5K
6M
499.8K
YTD
507.1K
1Y
542.2K
PRTA most recently traded 251,897 shares against a 3-month average daily volume of 473.5K.
More News
Read More
Earnings Scheduled For November 6, 2025 ↗
November 06, 2025
What's going on in today's after hours session ↗
April 27, 2026
Prothena Announces Leadership Team Updates
April 10, 2026
Prothena Announces up to $100 Million Share Repurchase Plan
February 27, 2026
Prothena Announces Board of Directors Update
December 12, 2025
Frequently Asked Questions
Is Prothena Corporation plc - Ordinary Shares publicly traded?
Yes, Prothena Corporation plc - Ordinary Shares is publicly traded.
What exchange does Prothena Corporation plc - Ordinary Shares trade on?
Prothena Corporation plc - Ordinary Shares trades on the Nasdaq Stock Market
What is the ticker symbol for Prothena Corporation plc - Ordinary Shares?
The ticker symbol for Prothena Corporation plc - Ordinary Shares is PRTA on the Nasdaq Stock Market
What is the current price of Prothena Corporation plc - Ordinary Shares?
The current price of Prothena Corporation plc - Ordinary Shares is 8.105
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 10/05/26 12:43 PM ET
What is the market capitalization of Prothena Corporation plc - Ordinary Shares?
The market capitalization of Prothena Corporation plc - Ordinary Shares is 365.11M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 365M shares outstanding.