PTGX: Protagonist Therapeutics Inc.

As of Friday, August 28th, 2026

$ 144.33

-5.17 -3.46%

Open: 147.73
High: 147.95
Low: 142.43
Volume: 499,776
Previous Close on Thursday, August 27th, 2026

$ 149.50

-2.00 -1.32%

Open: 150.35
High: 151.68
Low: 147.11
Volume: 381,588

Historical Data

Date Open High Low Close Volume Chg %Chg
2026-08-28 147.73 147.95 142.43 144.33 499,776 -5.17 -3.46
2026-08-27 150.35 151.68 147.11 149.50 381,588 -2.00 -1.32
2026-08-26 150.36 152.07 147.69 151.50 335,457 +0.91 +0.60
2026-08-25 155.84 157.98 150.09 150.59 585,936 -4.13 -2.67
2026-08-24 154.32 158.08 149.94 154.72 475,747 +0.40 +0.26
2026-08-21 152.10 154.95 150.82 154.32 402,512 +3.63 +2.41
2026-08-20 152.45 155.25 148.28 150.69 518,412 -4.25 -2.74
2026-08-19 160.81 160.81 154.22 154.94 778,103 -2.40 -1.53
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Metrics and Technicals

Period High Low Chg %Chg Max Drawdown SMA
Peak Trough %Loss
Period High Low Chg %Chg MDD SMA
5D 158.08
On 2026-08-24		 142.43
On 2026-08-28		 -9.99 -6.47 158.08
On 2026-08-24		 142.43
On 2026-08-28		 -9.90 150.13
10D 160.81
On 2026-08-19		 142.43
On 2026-08-28		 -10.77 -6.94 160.81
On 2026-08-19		 142.43
On 2026-08-28		 -11.43 152.66
20D 160.81
On 2026-08-19		 131.68
On 2026-08-03		 7.69 5.63 160.81
On 2026-08-19		 142.43
On 2026-08-28		 -11.43 149.04
WTD 158.08
On 2026-08-24		 142.43
On 2026-08-28		 -9.99 -6.47 158.08
On 2026-08-24		 142.43
On 2026-08-28		 -9.90 150.13
MTD 160.81
On 2026-08-19		 131.68
On 2026-08-03		 7.69 5.63 160.81
On 2026-08-19		 142.43
On 2026-08-28		 -11.43 149.04
As of Friday, August 28th, 2026
 
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VIX3M

CBOE S&P 500 3-Month Volatility Index

17.48 -0.08 -0.46
 
Recent
Ticker Last Chg %Chg Volume
PTGX

Protagonist Therapeutics Inc.

144.33 -5.17 -3.46 499,776