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Protagonist Therapeutics (PTGX) Stock Chart & Stock Price History

Protagonist Therapeutics logo
$148.18 +3.02 (+2.08%)
Closing price 09/11/2026 04:00 PM Eastern
Extended Trading
$151.44 +3.26 (+2.20%)
As of 09/11/2026 07:30 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.

Protagonist Therapeutics Stock Price Performance

The Protagonist Therapeutics (PTGX) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 151.75%, with a year-to-date return of 69.66%. In the past month, the stock has decreased 2.52%, reflecting recent market activity.

As of the latest close, Protagonist Therapeutics traded at $148.18 with a market cap of $9.59 billion and volume of 478,035 shares. Five years ago, the stock traded at $45.08, representing a 228.70% increase over that period. At the time, it had a market cap of $2.14 billion and a volume of 365,962 shares.

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5 Day
Performance
+1.69%
1 Month
Performance
-2.52%
3 Month
Performance
+34.98%
Year-To-Date
Performance
+69.66%
1 Year
Performance
+151.75%
5 Year
Performance
+228.70%

PTGX Stock Chart for Saturday, September, 12, 2026

Protagonist Therapeutics Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
09/11/2026$145.16$148.18
+2.08%
$150.48$145.82478,035 shs$9.59 billion
09/10/2026$145.09$145.16
+0.05%
$146.51$142.00543,127 shs$9.39 billion
09/09/2026$145.94$145.09
-0.58%
$151.19$144.46530,489 shs$9.39 billion
09/08/2026$145.72$145.94
+0.15%
$147.29$142.00700,124 shs$9.44 billion
09/07/2026$145.72$145.72$147.99$144.01501,296 shs$9.43 billion
09/04/2026$148.80$145.72
-2.07%
$147.99$144.01501,296 shs$9.43 billion
09/03/2026$146.08$148.80
+1.86%
$149.49$144.00353,886 shs$9.63 billion
09/02/2026$146.49$146.08
-0.28%
$149.42$144.61561,502 shs$9.45 billion
09/01/2026$147.75$146.49
-0.85%
$150.34$144.73534,133 shs$9.48 billion
08/31/2026$144.33$147.75
+2.37%
$149.30$141.95567,264 shs$9.56 billion
08/28/2026$149.50$144.33
-3.46%
$147.95$142.43500,143 shs$9.34 billion
08/27/2026$151.50$149.50
-1.32%
$151.68$147.11381,589 shs$9.67 billion
08/26/2026$150.59$151.50
+0.60%
$152.07$147.69335,461 shs$9.80 billion
08/25/2026$154.72$150.59
-2.67%
$157.98$150.09664,523 shs$9.74 billion
08/24/2026$154.32$154.72
+0.26%
$158.08$149.94483,340 shs$10.01 billion
08/21/2026$150.69$154.32
+2.41%
$154.95$150.82402,517 shs$9.99 billion
08/20/2026$154.94$150.69
-2.74%
$155.25$148.27518,559 shs$9.75 billion
08/19/2026$157.34$154.94
-1.53%
$160.81$154.22785,884 shs$10.03 billion
08/18/2026$158.62$157.34
-0.81%
$160.00$156.81471,647 shs$10.18 billion
08/17/2026$155.10$158.62
+2.27%
$158.95$153.60506,956 shs$10.26 billion
08/14/2026$151.42$155.10
+2.43%
$155.53$149.17426,259 shs$10.04 billion
08/13/2026$152.01$151.42
-0.39%
$154.99$150.92444,781 shs$9.80 billion
08/12/2026$148.29$152.01
+2.51%
$152.70$147.33416,397 shs$9.78 billion
08/11/2026$150.00$148.29
-1.14%
$151.88$147.37306,256 shs$9.54 billion

This page (NASDAQ:PTGX) was last updated on 9/11/2026 by MarketBeat.com Staff.
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