Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 105,747 |
| Open | 8.550 |
| Bid (Size) | 8.640 (100) |
| Ask (Size) | 8.670 (400) |
| Prev. Close | 8.560 |
| Today's Range | 8.470 - 8.650 |
| 52wk Range | 7.730 - 11.80 |
| Shares Outstanding | 45,047,449 |
| Dividend Yield | N/A |
Top News
More News
Prothena (NASDAQ:PRTA) Posts Q3 2026 Revenue Miss but Narrows Loss ↗
November 05, 2026
Performance
52-Week Range
26.7% below 52-week high
8.650
7.7352W Low
11.8052W High
1 Week
2.2% below 1-week high
7.791W Low
8.851W High
Prothena Corporation plc - Ordinary Shares (PRTA) traded between $7.73 and $11.80 over the past 52 weeks and last traded at $8.65, 26.7% below its 52-week high. Over the past week it ranged between $7.79 and $8.85.
Past 12 Months
1W
+$0.26
1M
+$0.22
3M
-$0.57
6M
-$0.78
YTD
-$0.55
1Y
-$1.88
PRTA was -17.9% over the past year, -8.3% over six months, -6.0% year to date, +3.1% in the last week.
12 Months vs Market
PRTA
-17.9%
DIA
+10.4%
SPY
+11.6%
QQQ
+11.3%
IWM
+16.0%
Over the past 12 months PRTA returned -17.9% versus DIA (Dow) +10.4%, SPY (S&P 500) +11.6%, QQQ (Nasdaq 100) +11.3% and IWM (Russell 2000) +16.0%.
Volume & Liquidity
0.23× 3-mo avg
Today 105,747
3-mo avg 465.8K
1W
473.0K
1M
489.6K
3M
465.8K
6M
519.4K
YTD
509.8K
1Y
535.3K
PRTA most recently traded 105,747 shares against a 3-month average daily volume of 465.8K.
More News
Read More
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 8.650
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 11/11/26 12:18 PM ET
What is the market capitalization of Prothena Corporation plc - Ordinary Shares?
The market capitalization of Prothena Corporation plc - Ordinary Shares is 389.66M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 390M shares outstanding.
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