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Prothena (PRTA) Stock Chart & Stock Price History

Prothena logo
$11.18 -0.01 (-0.09%)
Closing price 05/6/2026 04:00 PM Eastern
Extended Trading
$11.18 0.00 (0.00%)
As of 05/6/2026 04:25 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.

Prothena Stock Price Performance

The Prothena (PRTA) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 53.36%, with a year-to-date return of 17.07%. In the past month, the stock has increased 7.92%, reflecting recent market activity.

As of the latest close, Prothena traded at $11.18 with a market cap of $601.82 million and volume of 333,877 shares. Five years ago, the stock traded at $24.62, representing a 54.59% decrease over that period. At the time, it had a market cap of $984.95 million and a volume of 276,345 shares.

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1 Month
Performance
+7.92%
3 Month
Performance
+25.48%
Year-To-Date
Performance
+17.07%
1 Year
Performance
+53.36%
5 Year
Performance
-54.59%

PRTA Stock Chart for Thursday, May, 7, 2026

Prothena Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
05/06/2026$11.19$11.18
-0.09%
$11.30$11.02333,877 shs$601.82 million
05/05/2026N/A$11.19$11.25$10.89306,797 shs$602.36 million
04/30/2026$10.87$11.06
+1.75%
$11.12$10.84319,521 shs$595.36 million
04/29/2026$11.51$10.87
-5.56%
$11.46$10.74397,682 shs$585.13 million
04/28/2026$10.79$11.51
+6.67%
$11.57$10.83439,888 shs$619.62 million
04/27/2026$10.75$10.79
+0.37%
$11.12$10.71313,915 shs$580.83 million
04/24/2026$10.73$10.75
+0.19%
$10.82$10.40287,924 shs$578.67 million
04/23/2026$10.72$10.73
+0.09%
$11.07$10.60474,659 shs$577.60 million
04/22/2026$10.67$10.72
+0.47%
$10.85$10.61350,784 shs$577.09 million
04/21/2026$10.79$10.67
-1.11%
$10.78$10.48451,071 shs$574.37 million
04/20/2026$10.90$10.79
-1.01%
$10.97$10.77333,299 shs$580.83 million
04/17/2026$10.52$10.90
+3.61%
$10.99$10.70486,483 shs$586.75 million
04/16/2026$10.82$10.52
-2.77%
$10.85$10.45298,873 shs$566.32 million
04/15/2026$10.61$10.82
+1.98%
$10.87$10.51409,899 shs$582.44 million
04/14/2026$10.31$10.61
+2.91%
$10.67$10.34370,946 shs$571.14 million
04/13/2026$10.50$10.31
-1.81%
$10.55$10.18334,063 shs$555.02 million
04/10/2026$10.58$10.50
-0.76%
$10.60$10.37319,030 shs$565.25 million
04/09/2026$10.65$10.58
-0.66%
$10.70$10.38414,711 shs$569.52 million
04/08/2026$10.36$10.65
+2.80%
$10.68$10.29454,454 shs$573.29 million
04/07/2026$10.04$10.36
+3.19%
$10.37$9.80481,344 shs$557.71 million
04/06/2026$9.86$10.04
+1.83%
$10.10$9.88410,504 shs$540.45 million

This page (NASDAQ:PRTA) was last updated on 5/7/2026 by MarketBeat.com Staff.
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