Protagonist Therapeutics Inc. (PTGX)
NASDAQ · Healthcare
Protagonist Therapeutics Inc. Stock Price History
Protagonist Therapeutics Inc.
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Historical daily closing price for Protagonist Therapeutics Inc. since 2016, adjusted for splits and dividends. The latest closing stock price for Protagonist Therapeutics Inc. as of June 11, 2026 is 108.61.
- The all-time high Protagonist Therapeutics Inc. stock closing price was 108.61 on June 11, 2026.
- The Protagonist Therapeutics Inc. 52-week high stock price is 108.61, which is 0.0% above the current share price.
- The Protagonist Therapeutics Inc. 52-week low stock price is 49.70, which is 54.2% below the current share price.
- The average Protagonist Therapeutics Inc. stock price for the last 52 weeks is 79.61.
Annual Close Price
YEAR-END CLOSE · USD
ANNUAL % CHANGE · %
| Year | Average | Year Open | Year High | Year Low | Year Close | Annual % Change |
|---|---|---|---|---|---|---|
| 2026 | 94.36 | 87.18 | 108.61 | 79.73 | 108.61 | +24.35% |
| 2025 | 57.46 | 38.98 | 95.35 | 35.09 | 87.34 | +126.27% |
| 2024 | 35.24 | 23.42 | 48.43 | 21.79 | 38.60 | +68.34% |
| 2023 | 19.67 | 10.78 | 29.36 | 10.78 | 22.93 | +110.17% |
| 2022 | 14.48 | 35.32 | 36.08 | 7.06 | 10.91 | -68.10% |
| 2021 | 33.23 | 19.60 | 49.69 | 12.95 | 34.20 | +69.64% |
| 2020 | 15.15 | 6.93 | 25.13 | 5.40 | 20.16 | +185.96% |
| 2019 | 10.62 | 6.89 | 16.56 | 4.69 | 7.05 | +4.75% |
| 2018 | 10.69 | 21.15 | 23.08 | 5.99 | 6.73 | -67.64% |
| 2017 | 14.59 | 21.18 | 21.18 | 8.22 | 20.80 | -5.41% |
| 2016 | 19.16 | 11.70 | 26.24 | 10.44 | 21.99 | — |
Protagonist Therapeutics Inc. Stock Price History — FAQ
Protagonist Therapeutics Inc. (PTGX) stock price history — annual and quarterly figures with year-over-year growth and charts.
Where can I see PTGX's stock price history history?
The chart and table above show Protagonist Therapeutics Inc.'s stock price history by year and by quarter, including the growth rate.