Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 23,459 |
| Open | 8.550 |
| Bid (Size) | 8.440 (200) |
| Ask (Size) | 8.490 (300) |
| Prev. Close | 8.560 |
| Today's Range | 8.470 - 8.640 |
| 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
28.2% below 52-week high
8.470
7.7352W Low
11.8052W High
1 Week
4.2% 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 $8.47, 28.2% below its 52-week high. Over the past week it ranged between $7.79 and $8.85.
Past 12 Months
1W
+$0.08
1M
+$0.04
3M
-$0.75
6M
-$0.96
YTD
-$0.73
1Y
-$2.06
PRTA was -19.6% over the past year, -10.2% over six months, -7.9% year to date, +1.0% in the last week.
12 Months vs Market
PRTA
-19.6%
DIA
+10.0%
SPY
+11.0%
QQQ
+10.1%
IWM
+15.5%
Over the past 12 months PRTA returned -19.6% versus DIA (Dow) +10.0%, SPY (S&P 500) +11.0%, QQQ (Nasdaq 100) +10.1% and IWM (Russell 2000) +15.5%.
Volume & Liquidity
0.05× 3-mo avg
Today 23,459
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 23,459 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 8.470
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 11/11/26 10:05 AM ET
What is the market capitalization of Prothena Corporation plc - Ordinary Shares?
The market capitalization of Prothena Corporation plc - Ordinary Shares is 381.55M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 382M shares outstanding.
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