Prothena Corporation plc - Ordinary Shares (NQ:PRTA)
Price and Volume
Detailed Quote| Volume | 340,756 |
| Open | 8.210 |
| Bid (Size) | 7.000 (500) |
| Ask (Size) | 10.00 (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
30.8% below 52-week high
8.160
7.7352W Low
11.8052W High
1 Week
7.7% 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 $8.16, 30.8% below its 52-week high. Over the past week it ranged between $7.79 and $8.85.
Past 12 Months
1W
-$0.62
1M
-$0.21
3M
-$0.70
6M
-$1.60
YTD
-$1.04
1Y
-$2.02
PRTA was -19.8% over the past year, -16.4% over six months, -11.3% year to date, -7.0% in the last week.
12 Months vs Market
PRTA
-19.8%
DIA
+10.2%
SPY
+12.3%
QQQ
+11.8%
IWM
+17.2%
Over the past 12 months PRTA returned -19.8% versus DIA (Dow) +10.2%, SPY (S&P 500) +12.3%, QQQ (Nasdaq 100) +11.8% and IWM (Russell 2000) +17.2%.
Volume & Liquidity
0.73× 3-mo avg
Today 340,756
3-mo avg 463.9K
1W
421.0K
1M
464.2K
3M
463.9K
6M
515.3K
YTD
507.2K
1Y
531.3K
PRTA most recently traded 340,756 shares against a 3-month average daily volume of 463.9K.
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 8.160
When was Prothena Corporation plc - Ordinary Shares last traded?
The last trade of Prothena Corporation plc - Ordinary Shares was at 11/13/26 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 367.59M
How many shares of Prothena Corporation plc - Ordinary Shares are outstanding?
Prothena Corporation plc - Ordinary Shares has 368M shares outstanding.
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