Protagenic Therapeutics, Inc. (PTIX)
NASDAQ: PTIX · Real-Time Price · USD
3.210
-0.010 (-0.31%)
At close: Oct 20, 2025, 4:00 PM EDT
3.210
0.00 (0.00%)
After-hours: Oct 20, 2025, 4:00 PM EDT
Protagenic Therapeutics Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 17, 2025 | 2.97 | 3.22 | 2.97 | 3.22 | 3.22 | 5.57% | 76,701 |
| Oct 16, 2025 | 3.15 | 3.32 | 3.04 | 3.05 | 3.05 | -4.69% | 49,992 |
| Oct 15, 2025 | 3.03 | 3.32 | 3.03 | 3.20 | 3.20 | 5.61% | 58,616 |
| Oct 14, 2025 | 3.15 | 3.20 | 2.92 | 3.03 | 3.03 | -6.48% | 135,004 |
| Oct 13, 2025 | 3.30 | 3.45 | 3.24 | 3.24 | 3.24 | -3.28% | 58,483 |
| Oct 10, 2025 | 3.45 | 3.59 | 3.31 | 3.35 | 3.35 | -3.18% | 163,318 |
| Oct 9, 2025 | 3.42 | 3.77 | 3.42 | 3.46 | 3.46 | 1.17% | 114,654 |
| Oct 8, 2025 | 3.34 | 3.48 | 3.33 | 3.42 | 3.42 | 1.79% | 57,204 |
| Oct 7, 2025 | 3.31 | 3.39 | 3.30 | 3.36 | 3.36 | -1.18% | 22,988 |
| Oct 6, 2025 | 3.30 | 3.53 | 3.29 | 3.40 | 3.40 | 3.34% | 62,984 |
| Oct 3, 2025 | 3.26 | 3.50 | 3.22 | 3.29 | 3.29 | -0.30% | 141,935 |
| Oct 2, 2025 | 3.32 | 3.40 | 3.25 | 3.30 | 3.30 | -2.37% | 74,429 |
| Oct 1, 2025 | 3.35 | 3.41 | 3.31 | 3.38 | 3.38 | -1.46% | 77,905 |
| Sep 30, 2025 | 4.00 | 4.07 | 3.28 | 3.43 | 3.43 | -17.15% | 341,952 |
| Sep 29, 2025 | 4.30 | 4.42 | 4.01 | 4.14 | 4.14 | -3.50% | 110,130 |
| Sep 26, 2025 | 4.27 | 4.36 | 4.21 | 4.29 | 4.29 | 1.18% | 41,259 |
| Sep 25, 2025 | 4.10 | 4.43 | 4.03 | 4.24 | 4.24 | 3.16% | 135,194 |
| Sep 24, 2025 | 4.39 | 4.39 | 4.09 | 4.11 | 4.11 | -5.52% | 127,595 |
| Sep 23, 2025 | 4.53 | 4.55 | 4.28 | 4.35 | 4.35 | -0.46% | 139,739 |
| Sep 22, 2025 | 4.19 | 4.49 | 4.10 | 4.37 | 4.37 | 7.90% | 142,993 |
| Sep 19, 2025 | 3.83 | 4.09 | 3.73 | 4.05 | 4.05 | 5.74% | 135,897 |
| Sep 18, 2025 | 3.58 | 3.94 | 3.58 | 3.83 | 3.83 | 4.08% | 80,912 |
| Sep 17, 2025 | 3.36 | 3.73 | 3.36 | 3.68 | 3.68 | 8.24% | 81,174 |
| Sep 16, 2025 | 3.38 | 3.47 | 3.33 | 3.40 | 3.40 | 1.80% | 47,988 |
| Sep 15, 2025 | 3.35 | 3.38 | 3.22 | 3.34 | 3.34 | 3.73% | 57,102 |
| Sep 12, 2025 | 3.21 | 3.34 | 3.09 | 3.22 | 3.22 | -3.01% | 35,367 |
| Sep 11, 2025 | 2.85 | 3.39 | 2.79 | 3.32 | 3.32 | 16.08% | 204,890 |
| Sep 10, 2025 | 2.84 | 2.90 | 2.83 | 2.86 | 2.86 | - | 35,892 |
| Sep 9, 2025 | 2.82 | 2.89 | 2.75 | 2.86 | 2.86 | 0.35% | 107,658 |
| Sep 8, 2025 | 3.05 | 3.10 | 2.85 | 2.85 | 2.85 | -9.52% | 147,748 |
| Sep 5, 2025 | 3.10 | 3.21 | 3.10 | 3.15 | 3.15 | 1.61% | 129,552 |
| Sep 4, 2025 | 3.28 | 3.30 | 3.10 | 3.10 | 3.10 | -4.91% | 68,456 |
| Sep 3, 2025 | 3.60 | 3.60 | 3.15 | 3.26 | 3.26 | -9.19% | 153,138 |
| Sep 2, 2025 | 3.67 | 3.67 | 3.51 | 3.59 | 3.59 | -0.28% | 107,424 |
| Aug 29, 2025 | 3.66 | 3.67 | 3.53 | 3.60 | 3.60 | 1.41% | 154,686 |
| Aug 28, 2025 | 3.85 | 3.89 | 3.52 | 3.55 | 3.55 | -8.97% | 258,179 |
| Aug 27, 2025 | 3.90 | 4.08 | 3.84 | 3.90 | 3.90 | -1.76% | 227,301 |
| Aug 26, 2025 | 4.57 | 4.78 | 3.79 | 3.97 | 3.97 | -11.97% | 675,751 |
| Aug 25, 2025 | 4.06 | 5.15 | 4.06 | 4.51 | 4.51 | 6.37% | 2,945,144 |
| Aug 22, 2025 | 3.92 | 4.41 | 3.62 | 4.24 | 4.24 | -0.47% | 2,384,373 |
| Aug 21, 2025 | 3.64 | 6.20 | 3.55 | 4.26 | 4.26 | 86.84% | 158,176,479 |
| Aug 20, 2025 | 2.58 | 2.58 | 2.25 | 2.28 | 2.28 | -10.94% | 66,190 |
| Aug 19, 2025 | 2.78 | 2.78 | 2.50 | 2.56 | 2.56 | -7.91% | 59,534 |
| Aug 18, 2025 | 2.91 | 3.08 | 2.64 | 2.78 | 2.78 | -5.12% | 50,113 |
| Aug 15, 2025 | 3.15 | 3.15 | 2.86 | 2.93 | 2.93 | -4.56% | 83,197 |
| Aug 14, 2025 | 2.78 | 3.24 | 2.66 | 3.07 | 3.07 | 10.43% | 494,655 |
| Aug 13, 2025 | 2.70 | 2.81 | 2.66 | 2.78 | 2.78 | 1.09% | 96,456 |
| Aug 12, 2025 | 2.76 | 2.78 | 2.60 | 2.75 | 2.75 | -1.79% | 38,886 |
| Aug 11, 2025 | 2.75 | 2.86 | 2.75 | 2.80 | 2.80 | -1.06% | 19,841 |
| Aug 8, 2025 | 2.72 | 2.94 | 2.72 | 2.83 | 2.83 | 0.35% | 41,539 |