Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 642,381 |
| Open | 8.430 |
| Bid (Size) | 8.200 (100) |
| Ask (Size) | 8.700 (1,500) |
| Prev. Close | 8.480 |
| Today's Range | 8.360 - 8.810 |
| 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
27.0% below 52-week high
8.610
7.7352W Low
11.8052W High
1 Week
0.2% below 1-week high
7.801W Low
8.631W High
Prothena Corporation plc - Ordinary Shares (PRTA) traded between $7.73 and $11.80 over the past 52 weeks and last traded at $8.61, 27.0% below its 52-week high. Over the past week it ranged between $7.80 and $8.63.
Past 12 Months
1W
+$0.07
1M
-$0.93
3M
-$1.24
6M
-$2.04
YTD
-$0.59
1Y
-$1.56
PRTA was -15.3% over the past year, -19.2% over six months, -6.4% year to date, +0.8% in the last week.
12 Months vs Market
PRTA
-15.3%
DIA
+9.8%
SPY
+15.7%
QQQ
+23.7%
IWM
+13.7%
Over the past 12 months PRTA returned -15.3% versus DIA (Dow) +9.8%, SPY (S&P 500) +15.7%, QQQ (Nasdaq 100) +23.7% and IWM (Russell 2000) +13.7%.
Volume & Liquidity
1.33× 3-mo avg
Today 642,381
3-mo avg 481.5K
1W
609.5K
1M
521.2K
3M
481.5K
6M
503.9K
YTD
509.2K
1Y
544.1K
PRTA most recently traded 642,381 shares against a 3-month average daily volume of 481.5K.
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 8.610
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 10/08/26 04:00 PM ET
What is the market capitalization of Prothena Corporation plc - Ordinary Shares?
The market capitalization of Prothena Corporation plc - Ordinary Shares is 387.86M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 388M shares outstanding.