Protagenic Therapeutics, Inc. (PTIX) Stock Price History
Historical prices from 2021 to 2026
- 1M
- -22.6%
- 3M
- -33.3%
- YTD
- -51.4%
- 1Y
- -90.7%
- 3Y
- -76.5%
- 5Y
- -70.9%
Loading 10-year price history...
PTIX Historical Performance
PTIX Annual Returns
Year-by-year price performance · 2021–2026
- 2021 annual price return
- -38.7%
- 2022 annual price return
- -71.4%
- 2023 annual price return
- -39.6%
- 2024 annual price return
- -46.7%
- 2025 annual price return
- -82.1%
- 2026 annual price return
- -37.2%
PTIX Stock Price Trajectory (2021–2026)
As of June 29, 2026, Protagenic Therapeutics, Inc. (PTIX) trades at $0.36, representing a -90.7% return over the past year. The stock has delivered a -99.8% total return over five years (-70.9% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $273.84 on May 10, 2021. From this peak, PTIX has corrected -99.9%, currently trading 77% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers SAVA (-27.9% 1Y), ATHA (+43.2% 1Y), and NRXP (+6.6% 1Y), PTIX has underperformed the peer group average. Compare PTIX vs SAVA →
PTIX Historical Price Data · from 2021
Rows 1–50 of 1,286| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-06-25 | 0.36 | 0.36 | 0.36 | 0.36 | 428 | +0.03% |
| 2026-06-24 | 0.36 | 0.36 | 0.36 | 0.36 | 428 | -12.22% |
| 2026-06-22 | 0.41 | 0.41 | 0.41 | 0.41 | 8K | 0.00% |
| 2026-06-17 | 0.41 | 0.41 | 0.41 | 0.41 | 2K | +1.23% |
| 2026-06-16 | 0.41 | 0.41 | 0.41 | 0.41 | 3K | +1.25% |
| 2026-06-15 | 0.40 | 0.40 | 0.40 | 0.40 | 400 | 0.00% |
| 2026-06-12 | 0.54 | 0.54 | 0.40 | 0.40 | 23K | -41.18% |
| 2026-06-11 | 0.68 | 0.68 | 0.68 | 0.68 | 500 | +28.54% |
| 2026-06-09 | 0.50 | 0.53 | 0.50 | 0.53 | 1K | +5.80% |
| 2026-06-05 | 0.50 | 0.55 | 0.50 | 0.50 | 4K | 0.00% |
| 2026-06-04 | 0.50 | 0.55 | 0.50 | 0.50 | 4K | -5.66% |
| 2026-06-03 | 0.50 | 0.55 | 0.50 | 0.53 | 4K | +6.00% |
| 2026-06-02 | 0.50 | 0.55 | 0.50 | 0.50 | 4K | +24.78% |
| 2026-06-01 | 0.55 | 0.55 | 0.40 | 0.40 | 2K | -26.21% |
| 2026-05-29 | 0.54 | 0.54 | 0.54 | 0.54 | 3 | +18.04% |
| 2026-05-27 | 0.46 | 0.46 | 0.46 | 0.46 | 400 | -1.16% |
| 2026-05-26 | 0.64 | 0.65 | 0.47 | 0.47 | 3K | -24.69% |
| 2026-05-21 | 0.65 | 0.65 | 0.62 | 0.62 | 140 | -4.92% |
| 2026-05-20 | 0.65 | 0.65 | 0.65 | 0.65 | 140 | 0.00% |
| 2026-05-19 | 0.65 | 0.65 | 0.65 | 0.65 | 140 | +0.02% |
| 2026-05-18 | 0.65 | 0.65 | 0.65 | 0.65 | 140 | 0.00% |
| 2026-05-15 | 0.65 | 0.65 | 0.65 | 0.65 | 359 | +32.63% |
| 2026-05-13 | 0.53 | 0.53 | 0.43 | 0.49 | 25K | +13.93% |
| 2026-05-12 | 0.53 | 0.53 | 0.43 | 0.43 | 25K | -33.83% |
| 2026-05-11 | 0.82 | 0.82 | 0.53 | 0.65 | 2K | -17.72% |
| 2026-05-08 | 0.64 | 0.80 | 0.62 | 0.79 | 7K | +36.21% |
| 2026-05-07 | 0.53 | 0.58 | 0.53 | 0.58 | 846 | +5.45% |
| 2026-05-06 | 0.53 | 0.55 | 0.53 | 0.55 | 232 | -3.49% |
| 2026-05-05 | 0.72 | 0.72 | 0.57 | 0.57 | 10K | -20.84% |
| 2026-05-04 | 0.72 | 0.72 | 0.72 | 0.72 | 300 | -10.01% |
| 2026-05-01 | 0.83 | 0.83 | 0.80 | 0.80 | 3K | -9.09% |
| 2026-04-30 | 0.88 | 0.88 | 0.88 | 0.88 | 2K | -0.01% |
| 2026-04-29 | 1.08 | 1.20 | 0.88 | 0.88 | 9K | -15.38% |
| 2026-04-28 | 0.99 | 1.04 | 0.95 | 1.04 | 25K | +9.14% |
| 2026-04-27 | 0.86 | 1.00 | 0.86 | 0.95 | 18K | +16.24% |
| 2026-04-24 | 0.70 | 0.82 | 0.70 | 0.82 | 9K | +10.78% |
| 2026-04-23 | 0.66 | 0.74 | 0.66 | 0.74 | 7K | +12.12% |
| 2026-04-22 | 0.66 | 0.66 | 0.66 | 0.66 | 434 | 0.00% |
| 2026-04-21 | 0.53 | 0.66 | 0.53 | 0.66 | 5K | +20.00% |
| 2026-04-20 | 0.53 | 0.55 | 0.53 | 0.55 | 1K | -3.47% |
| 2026-04-17 | 0.56 | 0.57 | 0.56 | 0.57 | 1K | +5.52% |
| 2026-04-16 | 0.54 | 0.54 | 0.54 | 0.54 | 121 | -1.82% |
| 2026-04-14 | 0.55 | 0.55 | 0.55 | 0.55 | 1K | 0.00% |
| 2026-04-13 | 0.58 | 0.58 | 0.55 | 0.55 | 5K | -20.29% |
| 2026-04-09 | 0.53 | 0.69 | 0.53 | 0.69 | 485 | 0.00% |
| 2026-04-08 | 0.53 | 0.69 | 0.53 | 0.69 | 485 | -1.34% |
| 2026-04-07 | 0.53 | 0.70 | 0.53 | 0.70 | 1K | +31.96% |
| 2026-04-06 | 0.53 | 0.53 | 0.53 | 0.53 | 420 | -0.02% |
| 2026-04-02 | 0.57 | 0.57 | 0.53 | 0.53 | 3K | +1.92% |
| 2026-04-01 | 0.52 | 0.52 | 0.52 | 0.52 | 186 | -0.13% |
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.
PTIX — Frequently Asked Questions
Quick answers to the most common questions about buying PTIX stock.
How has PTIX stock performed recently?
PTIX declined -90.7% over the past year, below its 5-year annualized CAGR of -70.9%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is PTIX's all-time high price?
Protagenic Therapeutics, Inc. reached $273.84 on 2021-05-10. The 52-week high is $6.20. Current 1-year return of -90.7% places the stock further from historical peaks.
Where can I download PTIX historical price data?
This page provides PTIX daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2021-2026, downloadable in CSV format.