Stock listing
OTC:PTIX Protagenic Therapeutics, Inc. Stock
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Share price · OTC:PTIX
$0.638 USD -0.008 (-1.2%)
Close on Oct 30, 2026
- Day range
- $0.638 – $0.638 USDOct 30, 2026
- Volume
- 2,700 sharesOct 30, 2026
- 52-week range
- $0.128 – $2.665 USDLowest and highest trades, Oct 31, 2025 – Oct 30, 2026
- Traded on an average day
- $10,108 USDMedian day 2,450 shares · 10 days with no trades · last 3 months, Jul 30, 2026 – Oct 30, 2026
Daily closes
Last 3 months, Jul 30, 2026 – Oct 30, 2026 · OTC:PTIX · USD, adjusted for splits
| Day | Close | Change | % | Open | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| $0.638 | -0.008 | -1.2% | $0.638 | $0.638 | $0.638 | 2,700 | |
| $0.646 | -0.007 | -1.1% | $0.648 | $0.648 | $0.642 | 1,700 | |
| $0.653 | 0.000 | 0.0% | $0.653 | $0.653 | $0.653 | 0 | |
| $0.653 | +0.005 | +0.8% | $0.653 | $0.653 | $0.653 | 100 | |
| $0.648 | -0.072 | -10.0% | $0.720 | $0.720 | $0.648 | 3,500 | |
| $0.720 | -0.015 | -2.0% | $0.720 | $0.720 | $0.720 | 900 | |
| $0.735 | +0.015 | +2.1% | $0.735 | $0.735 | $0.735 | 500 | |
| $0.720 | -0.030 | -4.0% | $0.720 | $0.720 | $0.720 | 100 | |
| $0.750 | 0.000 | 0.0% | $0.750 | $0.750 | $0.750 | 0 | |
| $0.750 | 0.000 | 0.0% | $0.763 | $0.763 | $0.750 | 1,300 | |
| $0.750 | 0.000 | 0.0% | $0.750 | $0.750 | $0.750 | 0 | |
| $0.750 | -0.050 | -6.3% | $0.750 | $0.750 | $0.750 | 200 | |
| $0.800 | -0.006 | -0.7% | $0.800 | $0.800 | $0.800 | 800 | |
| $0.806 | 0.000 | 0.0% | $0.806 | $0.806 | $0.806 | 1,100 | |
| $0.806 | +0.036 | +4.7% | $0.750 | $0.806 | $0.750 | 1,000 | |
| $0.770 | 0.000 | 0.0% | $0.770 | $0.770 | $0.770 | 0 | |
| $0.770 | 0.000 | 0.0% | $0.770 | $0.770 | $0.770 | 0 | |
| $0.770 | 0.000 | 0.0% | $0.770 | $0.770 | $0.770 | 0 | |
| $0.770 | -0.004 | -0.5% | $0.786 | $0.786 | $0.770 | 2,000 | |
| $0.774 | 0.000 | 0.0% | $0.774 | $0.774 | $0.774 | 0 | |
| $0.774 | -0.006 | -0.8% | $0.780 | $0.780 | $0.774 | 1,200 | |
| $0.780 | -0.030 | -3.7% | $0.800 | $0.801 | $0.780 | 5,700 | |
| $0.810 | +0.002 | +0.2% | $0.832 | $0.832 | $0.810 | 900 | |
| $0.808 | +0.028 | +3.6% | $0.820 | $0.820 | $0.808 | 1,200 | |
| $0.780 | +0.006 | +0.8% | $0.774 | $0.780 | $0.774 | 300 | |
| $0.774 | -0.042 | -5.1% | $0.805 | $0.805 | $0.774 | 4,100 | |
| $0.816 | -0.044 | -5.1% | $0.816 | $0.816 | $0.816 | 1,300 | |
| $0.860 | 0.000 | 0.0% | $0.870 | $0.870 | $0.860 | 2,400 | |
| $0.860 | -0.046 | -5.1% | $0.865 | $0.884 | $0.860 | 800 | |
| $0.906 | -0.008 | -0.9% | $0.914 | $0.930 | $0.906 | 3,400 | |
| $0.914 | +0.185 | +25.4% | $0.730 | $0.914 | $0.730 | 33,500 | |
| $0.729 | -0.111 | -13.2% | $0.769 | $0.769 | $0.729 | 10,300 | |
| $0.840 | +0.050 | +6.3% | $0.770 | $0.840 | $0.765 | 3,300 | |
| $0.790 | -0.040 | -4.8% | $0.810 | $0.810 | $0.790 | 11,400 | |
| $0.830 | -0.041 | -4.7% | $0.808 | $0.850 | $0.808 | 6,700 | |
| $0.871 | 0.000 | 0.0% | $0.810 | $0.871 | $0.810 | 400 | |
| $0.871 | -0.049 | -5.3% | $0.900 | $0.900 | $0.810 | 3,100 | |
| $0.920 | -0.106 | -10.3% | $0.910 | $0.938 | $0.850 | 28,100 | |
| $1.026 | -0.034 | -3.2% | $1.000 | $1.090 | $0.900 | 25,800 | |
| $1.060 | +0.060 | +6.0% | $0.950 | $1.060 | $0.950 | 1,700 | |
| $1.000 | -0.050 | -4.8% | $1.020 | $1.020 | $0.950 | 10,700 | |
| $1.050 | -0.140 | -11.8% | $1.190 | $1.190 | $1.050 | 17,700 | |
| $1.190 | -0.010 | -0.8% | $1.225 | $1.240 | $1.130 | 26,200 | |
| $1.200 | +0.220 | +22.4% | $1.110 | $1.230 | $1.110 | 30,100 | |
| $0.980 | +0.045 | +4.8% | $0.935 | $1.110 | $0.935 | 45,800 | |
| $0.935 | +0.045 | +5.1% | $0.850 | $0.935 | $0.770 | 36,600 | |
| $0.890 | -0.060 | -6.3% | $0.950 | $1.010 | $0.864 | 18,000 | |
| $0.950 | -0.140 | -12.8% | $1.180 | $1.200 | $0.850 | 43,400 | |
| $1.090 | +0.289 | +36.1% | $0.850 | $1.320 | $0.850 | 115,600 | |
| $0.801 | +0.201 | +33.5% | $0.649 | $0.910 | $0.630 | 140,600 | |
| $0.600 | +0.250 | +71.4% | $0.400 | $0.613 | $0.400 | 40,700 | |
| $0.350 | -0.010 | -2.8% | $0.342 | $0.370 | $0.342 | 4,100 | |
| $0.360 | 0.000 | 0.0% | $0.360 | $0.360 | $0.360 | 0 | |
| $0.360 | 0.000 | 0.0% | $0.360 | $0.360 | $0.360 | 0 | |
| $0.360 | 0.000 | 0.0% | $0.360 | $0.363 | $0.321 | 2,500 | |
| $0.360 | 0.000 | 0.0% | $0.360 | $0.360 | $0.360 | 0 | |
| $0.360 | +0.040 | +12.5% | $0.360 | $0.360 | $0.360 | 300 | |
| $0.320 | -0.030 | -8.6% | $0.300 | $0.320 | $0.300 | 4,700 | |
| $0.350 | +0.040 | +12.9% | $0.270 | $0.413 | $0.270 | 48,200 | |
| $0.310 | +0.090 | +40.9% | $0.310 | $0.310 | $0.310 | 100 | |
| $0.220 | -0.039 | -15.1% | $0.250 | $0.250 | $0.220 | 4,000 | |
| $0.259 | +0.049 | +23.3% | $0.250 | $0.259 | $0.250 | 9,000 | |
| $0.210 | +0.027 | +14.8% | $0.180 | $0.210 | $0.180 | 2,600 | |
| $0.183 | +0.003 | +1.7% | $0.210 | $0.210 | $0.140 | 400 | |
| $0.180 | +0.013 | +7.8% | $0.180 | $0.180 | $0.180 | 2,800 | |
| $0.167 | +0.039 | +30.5% | $0.140 | $0.189 | $0.140 | 28,200 |
- Ticker
- OTC:PTIX
- Asset type
- Stock
- Exchange
- OTC
- Currency
- USD
Decks
Investor Presentation (August 2021)
Investor deck · 28 slides · August 2021
Protagenic Therapeutics, Inc.\new — Investor Presentation (April 2021)
Investor deck · 28 slides · Apr 21, 2021
Protagenic Therapeutics, Inc.\new — Investor Presentation (April 2021)
Investor deck · 28 slides · Apr 8, 2021
Traffix — Merger or Acquisition (December 2007)
Merger or acquisition · 30 slides · Dec 5, 2007
Protagenic Therapeutics, Inc. on 6ix
- Decks
- 4 decks · latest August 2021
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