Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 102,356 |
| Open | 8.210 |
| Bid (Size) | 8.250 (300) |
| Ask (Size) | 8.270 (100) |
| Prev. Close | 8.230 |
| Today's Range | 8.010 - 8.310 |
| 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
30.0% below 52-week high
8.260
7.7352W Low
11.8052W High
1 Week
6.6% 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 $8.26, 30.0% below its 52-week high. Over the past week it ranged between $7.79 and $8.85.
Past 12 Months
1W
+$0.29
1M
-$0.10
3M
-$0.82
6M
-$1.60
YTD
-$0.94
1Y
-$2.59
PRTA was -23.9% over the past year, -16.2% over six months, -10.2% year to date, +3.6% in the last week.
12 Months vs Market
PRTA
-23.9%
DIA
+8.2%
SPY
+10.0%
QQQ
+9.1%
IWM
+13.6%
Over the past 12 months PRTA returned -23.9% versus DIA (Dow) +8.2%, SPY (S&P 500) +10.0%, QQQ (Nasdaq 100) +9.1% and IWM (Russell 2000) +13.6%.
Volume & Liquidity
0.22× 3-mo avg
Today 102,356
3-mo avg 464.0K
1W
437.3K
1M
474.4K
3M
464.0K
6M
516.2K
YTD
508.0K
1Y
532.6K
PRTA most recently traded 102,356 shares against a 3-month average daily volume of 464.0K.
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 8.260
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 11/13/26 12:09 PM ET
What is the market capitalization of Prothena Corporation plc - Ordinary Shares?
The market capitalization of Prothena Corporation plc - Ordinary Shares is 372.09M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 372M shares outstanding.
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