Protagonist Therapeutics, Inc. (PTGX) Stock Price History
Historical prices from 2016 to 2026
- 1M
- -6.1%
- 3M
- +26.0%
- YTD
- +66.3%
- 1Y
- +124.7%
- 3Y
- +104.4%
- 5Y
- +56.8%
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
- +56.7%
PTGX Stock Price Trajectory (2016–2026)
As of October 3, 2026, Protagonist Therapeutics, Inc. (PTGX) trades at $144.98, representing a +124.7% return over the past year. The stock has delivered a +847.0% total return over five years (+56.8% CAGR), reflecting significant long-term value creation.
The stock reached its all-time high of $160.81 on August 19, 2026. From this peak, PTGX has corrected -9.8%, currently trading 33% above its 200-day moving average, indicating continued institutional support.
When compared to Healthcare sector peers IMVT (+138.5% 1Y), KYMR (+130.7% 1Y), and PRTA (+2.7% 1Y), PTGX has underperformed the peer group average. Compare PTGX vs IMVT →
PTGX Historical Price Data · from 2016
Rows 1–50 of 2,541| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-09-21 | 143.95 | 145.37 | 143.53 | 144.98 | 725K | +1.38% |
| 2026-09-18 | 143.65 | 144.58 | 140.44 | 143.00 | 1.78M | -0.49% |
| 2026-09-17 | 144.72 | 146.50 | 142.31 | 143.70 | 559K | +0.60% |
| 2026-09-16 | 144.19 | 146.19 | 140.88 | 142.84 | 507K | -0.39% |
| 2026-09-15 | 147.48 | 147.48 | 142.21 | 143.40 | 605K | -2.96% |
| 2026-09-14 | 149.92 | 150.08 | 146.86 | 147.78 | 598K | -0.27% |
| 2026-09-11 | 147.18 | 150.48 | 145.91 | 148.18 | 476K | +2.08% |
| 2026-09-10 | 143.29 | 146.40 | 142.00 | 145.16 | 538K | +0.05% |
| 2026-09-09 | 145.78 | 151.27 | 144.38 | 145.09 | 530K | -0.58% |
| 2026-09-08 | 142.35 | 147.24 | 142.35 | 145.94 | 635K | +0.15% |
| 2026-09-04 | 146.47 | 147.99 | 144.24 | 145.72 | 501K | -2.07% |
| 2026-09-03 | 146.68 | 149.49 | 144.00 | 148.80 | 354K | +1.86% |
| 2026-09-02 | 148.00 | 149.90 | 144.61 | 146.08 | 561K | -0.28% |
| 2026-09-01 | 148.13 | 150.35 | 144.73 | 146.49 | 534K | -0.85% |
| 2026-08-31 | 143.26 | 149.29 | 142.72 | 147.75 | 567K | +2.37% |
| 2026-08-28 | 147.73 | 147.73 | 142.44 | 144.33 | 500K | -3.46% |
| 2026-08-27 | 150.35 | 151.68 | 147.11 | 149.50 | 381K | -1.32% |
| 2026-08-26 | 150.36 | 152.07 | 147.69 | 151.50 | 335K | +0.60% |
| 2026-08-25 | 155.84 | 157.98 | 150.09 | 150.59 | 665K | -2.67% |
| 2026-08-24 | 154.32 | 158.08 | 149.94 | 154.72 | 483K | +0.26% |
| 2026-08-21 | 152.10 | 154.95 | 150.82 | 154.32 | 403K | +2.41% |
| 2026-08-20 | 152.45 | 155.25 | 148.28 | 150.69 | 519K | -2.74% |
| 2026-08-19 | 160.81 | 160.81 | 154.22 | 154.94 | 786K | -1.53% |
| 2026-08-18 | 157.96 | 160.00 | 156.81 | 157.34 | 472K | -0.81% |
| 2026-08-17 | 155.11 | 158.95 | 153.60 | 158.62 | 507K | +2.27% |
| 2026-08-14 | 150.23 | 155.53 | 149.17 | 155.10 | 426K | +2.43% |
| 2026-08-13 | 153.15 | 154.99 | 150.92 | 151.42 | 445K | -0.39% |
| 2026-08-12 | 148.21 | 152.70 | 147.33 | 152.01 | 417K | +2.51% |
| 2026-08-11 | 151.88 | 151.88 | 147.37 | 148.29 | 307K | -1.14% |
| 2026-08-10 | 149.31 | 151.60 | 147.40 | 150.00 | 546K | +2.83% |
| 2026-08-07 | 146.18 | 147.32 | 144.44 | 145.87 | 321K | -0.21% |
| 2026-08-06 | 145.01 | 148.00 | 139.95 | 146.18 | 838K | +6.45% |
| 2026-08-05 | 137.49 | 138.08 | 135.39 | 137.32 | 431K | +1.11% |
| 2026-08-04 | 133.02 | 138.05 | 132.26 | 135.81 | 635K | +2.67% |
| 2026-08-03 | 135.78 | 135.98 | 131.68 | 132.28 | 451K | -3.19% |
| 2026-07-31 | 138.36 | 138.37 | 131.69 | 136.64 | 549K | -1.44% |
| 2026-07-30 | 131.77 | 138.95 | 130.63 | 138.64 | 556K | +4.24% |
| 2026-07-29 | 136.90 | 137.43 | 132.72 | 133.00 | 596K | -2.81% |
| 2026-07-28 | 136.69 | 137.00 | 133.20 | 136.84 | 282K | +0.94% |
| 2026-07-27 | 136.11 | 139.92 | 135.43 | 135.56 | 417K | -0.40% |
| 2026-07-24 | 136.11 | 137.20 | 133.78 | 136.11 | 298K | +0.50% |
| 2026-07-23 | 133.79 | 137.32 | 132.00 | 135.43 | 606K | -0.01% |
| 2026-07-22 | 139.45 | 139.45 | 134.42 | 135.44 | 710K | -2.08% |
| 2026-07-21 | 133.34 | 139.72 | 131.05 | 138.31 | 581K | +3.01% |
| 2026-07-20 | 141.79 | 143.29 | 133.64 | 134.27 | 763K | -4.71% |
| 2026-07-17 | 131.37 | 141.08 | 131.37 | 140.91 | 519K | +6.73% |
| 2026-07-16 | 135.21 | 136.56 | 131.35 | 132.02 | 602K | -2.54% |
| 2026-07-15 | 128.00 | 139.22 | 126.97 | 135.46 | 836K | +3.19% |
| 2026-07-14 | 131.89 | 131.95 | 128.68 | 131.27 | 565K | +1.06% |
| 2026-07-13 | 130.05 | 131.36 | 125.32 | 129.89 | 541K | -1.16% |
PTGX Chart Terminal
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Live Breakouts Feed
High-probability breakout stocks crossing their pivot across 5 pattern engines.
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
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 +124.7% over the past year, beating its 5-year annualized CAGR of +56.8%. The stock trades above its 200-day moving average, confirming the uptrend.
What is PTGX's all-time high price?
Protagonist Therapeutics, Inc. reached $160.81 on 2026-08-19. The 52-week high is $160.81. Current 1-year return of +124.7% 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.