Protagonist Therapeutics, Inc. (PTGX) Stock Price History
Historical prices from 2016 to 2026
- 1M
- +12.0%
- 3M
- +16.2%
- YTD
- +29.5%
- 1Y
- +109.3%
- 3Y
- +61.1%
- 5Y
- +21.6%
Loading 10-year price history...
PTGX Historical Performance
PTGX Annual Returns
Year-by-year price performance · 2016–2026
- 2016 annual price return
- +87.9%
- 2017 annual price return
- -1.8%
- 2018 annual price return
- -68.2%
- 2019 annual price return
- +2.3%
- 2020 annual price return
- +190.9%
- 2021 annual price return
- +74.5%
- 2022 annual price return
- -69.1%
- 2023 annual price return
- +112.7%
- 2024 annual price return
- +64.8%
- 2025 annual price return
- +124.1%
- 2026 annual price return
- +5.6%
PTGX Stock Price Trajectory (2016–2026)
As of June 22, 2026, Protagonist Therapeutics, Inc. (PTGX) trades at $112.86, representing a +109.3% return over the past year. The stock has delivered a +165.7% total return over five years (+21.6% CAGR), reflecting significant long-term value creation.
The stock reached its all-time high of $114.48 on June 18, 2026. From this peak, PTGX has corrected -1.4%, currently trading 29% above its 200-day moving average, indicating continued institutional support.
When compared to Healthcare sector peers IMVT (+122.8% 1Y), KYMR (+94.7% 1Y), and PRTA (+55.3% 1Y), PTGX has underperformed the peer group average. Compare PTGX vs IMVT →
PTGX Historical Price Data · from 2016
Rows 1–50 of 2,478| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-06-18 | 112.88 | 114.48 | 111.28 | 112.86 | 1.27M | +1.27% |
| 2026-06-17 | 110.84 | 113.47 | 110.20 | 111.44 | 670K | +0.72% |
| 2026-06-16 | 112.83 | 113.66 | 108.53 | 110.64 | 327K | -1.62% |
| 2026-06-15 | 109.91 | 112.77 | 109.81 | 112.46 | 443K | +2.44% |
| 2026-06-12 | 109.85 | 111.78 | 109.60 | 109.78 | 440K | -0.01% |
| 2026-06-11 | 106.28 | 110.82 | 106.28 | 109.79 | 535K | +3.80% |
| 2026-06-10 | 105.17 | 111.45 | 104.89 | 105.77 | 749K | -0.09% |
| 2026-06-09 | 99.04 | 106.48 | 98.08 | 105.87 | 862K | +8.00% |
| 2026-06-08 | 98.95 | 101.16 | 96.70 | 98.03 | 548K | +0.67% |
| 2026-06-05 | 102.17 | 102.54 | 96.38 | 97.38 | 871K | -5.26% |
| 2026-06-04 | 96.39 | 103.65 | 96.39 | 102.79 | 638K | +7.74% |
| 2026-06-03 | 93.93 | 95.61 | 93.00 | 95.41 | 554K | +2.34% |
| 2026-06-02 | 93.84 | 97.71 | 92.83 | 93.23 | 711K | -1.78% |
| 2026-06-01 | 97.85 | 98.32 | 93.50 | 94.92 | 784K | -4.66% |
| 2026-05-29 | 100.64 | 102.40 | 98.84 | 99.56 | 541K | -0.85% |
| 2026-05-28 | 102.63 | 103.71 | 99.42 | 100.41 | 517K | -1.76% |
| 2026-05-27 | 100.05 | 102.49 | 98.94 | 102.21 | 390K | +2.23% |
| 2026-05-26 | 100.03 | 100.78 | 97.93 | 99.98 | 339K | +0.80% |
| 2026-05-22 | 102.01 | 102.42 | 99.13 | 99.19 | 361K | -2.76% |
| 2026-05-21 | 101.13 | 103.43 | 98.60 | 102.01 | 386K | +1.12% |
| 2026-05-20 | 100.42 | 101.90 | 98.37 | 100.88 | 361K | +2.55% |
| 2026-05-19 | 100.38 | 100.38 | 96.92 | 98.37 | 486K | -2.35% |
| 2026-05-18 | 103.22 | 104.16 | 100.60 | 100.74 | 431K | -1.41% |
| 2026-05-15 | 103.95 | 104.39 | 101.72 | 102.18 | 474K | -3.19% |
| 2026-05-14 | 104.30 | 105.72 | 101.67 | 105.55 | 407K | +1.61% |
| 2026-05-13 | 99.06 | 104.23 | 98.22 | 103.88 | 487K | +3.93% |
| 2026-05-12 | 103.50 | 103.50 | 98.34 | 99.95 | 635K | -3.43% |
| 2026-05-11 | 100.12 | 105.33 | 99.94 | 103.50 | 561K | +4.17% |
| 2026-05-08 | 98.51 | 100.15 | 97.00 | 99.36 | 488K | +0.52% |
| 2026-05-07 | 103.55 | 104.68 | 98.53 | 98.85 | 745K | -4.92% |
| 2026-05-06 | 99.96 | 105.03 | 99.96 | 103.97 | 570K | +4.72% |
| 2026-05-05 | 100.27 | 101.21 | 97.45 | 99.28 | 377K | -0.35% |
| 2026-05-04 | 98.00 | 101.08 | 98.00 | 99.63 | 174K | +1.28% |
| 2026-05-01 | 99.16 | 99.47 | 97.17 | 98.37 | 308K | -0.61% |
| 2026-04-30 | 99.75 | 99.75 | 97.20 | 98.97 | 565K | +0.46% |
| 2026-04-29 | 100.27 | 100.35 | 98.11 | 98.52 | 568K | -2.66% |
| 2026-04-28 | 99.50 | 102.47 | 97.79 | 101.21 | 583K | +2.74% |
| 2026-04-27 | 100.65 | 102.16 | 98.31 | 98.51 | 954K | -1.49% |
| 2026-04-24 | 103.17 | 104.27 | 99.00 | 100.00 | 666K | -2.55% |
| 2026-04-23 | 106.34 | 106.34 | 102.36 | 102.62 | 560K | -2.78% |
| 2026-04-22 | 106.43 | 107.00 | 103.93 | 105.55 | 340K | -0.32% |
| 2026-04-21 | 104.94 | 106.45 | 103.69 | 105.89 | 373K | +0.40% |
| 2026-04-20 | 105.13 | 106.46 | 104.00 | 105.47 | 523K | -0.48% |
| 2026-04-17 | 105.57 | 106.91 | 103.51 | 105.98 | 988K | +2.17% |
| 2026-04-16 | 103.59 | 104.53 | 102.45 | 103.73 | 394K | -1.62% |
| 2026-04-15 | 105.96 | 106.66 | 103.02 | 105.44 | 718K | +0.69% |
| 2026-04-14 | 98.35 | 104.78 | 97.58 | 104.72 | 692K | +7.33% |
| 2026-04-13 | 98.61 | 101.04 | 95.40 | 97.57 | 1.07M | -1.26% |
| 2026-04-10 | 104.28 | 104.28 | 98.41 | 98.82 | 566K | -5.06% |
| 2026-04-09 | 102.09 | 105.11 | 101.45 | 104.08 | 680K | +1.95% |
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
PTGX — Frequently Asked Questions
Quick answers to the most common questions about buying PTGX stock.
How has PTGX stock performed recently?
PTGX returned +109.3% over the past year, beating its 5-year annualized CAGR of +21.6%. The stock trades above its 200-day moving average, confirming the uptrend.
What is PTGX's all-time high price?
Protagonist Therapeutics, Inc. reached $114.48 on 2026-06-18. The 52-week high is $114.48. Current 1-year return of +109.3% places the stock closer to historical peaks.
Where can I download PTGX historical price data?
This page provides PTGX daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2016-2026, downloadable in CSV format.