Stocks›Protagonist Therapeutics, Inc.☆ ● At closeAs of Aug 12, 2026
Protagonist Therapeutics, Inc.
PTGX✓HealthcareBiotechnologyNASDAQ
● At closeAs of Aug 12, 2026
$160.40+5.52%Pre-market
$9.78BMarket cap
-75.16xP/E ratio
416.32KVolume (24h)
HealthcareBiotechnologyNASDAQ
Protagonist Therapeutics, Inc. (PTGX) Stock Price History
PTGX price history from Jul 9, 2021 to Aug 12, 2026. Levels shown in USD; returns are price-only, dividends not reinvested.
Summary
5-year high
$152.70 Aug 12, 2026
5-year low
$6.91 Jun 14, 2022
52-week range
$53.49 - $152.70
Yearly performance
| Year | Open | Close | High | Low | Return |
|---|
| 2026YTD | $87.18 | $152.01 | $152.70 | $77.00 | +74.36% |
| 2025 | $38.98 | $87.34 | $96.54 | $33.70 | +124.06% |
| 2024 | $23.42 | $38.60 | $48.89 | $21.43 | +64.82% |
| 2023 | $10.78 | $22.93 | $30.10 | $10.62 | +112.71% |
| 2022 | $35.32 | $10.91 | $37.04 | $6.91 | -69.11% |
| 2021 | $46.19 | $34.20 | $50.54 | $12.80 | -25.96% |