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Protagenic Therapeutics Inc Stock (PTIX) Price History

The historical daily chart and data for Protagenic Therapeutics Inc stock (PTIX), show that the latest closing stock price as of September 30, 2025, is $3.43.
  • Protagenic Therapeutics Inc all-time high stock price is $26.18, occurred on May 22, 2024.
  • The lowest Protagenic Therapeutics Inc stock price recorded was $0.00 on November 24, 2023. Since then, Protagenic Therapeutics Inc's stock price has risen over to $3.43 now.
  • The 52-week high stock price for PTIX is $15.26, representing a 344.90% increase from the current share price, occurred on November 12, 2024.
  • The 52-week low stock price for PTIX is $2.25, indicating a -34.40% decrease from the current share price, occurred on August 20, 2025.
  • The closing price of Protagenic Therapeutics Inc (PTIX) stock in the beginning of 2024 was $5.60. The stock closed the year at $1.60, a loss of over -71.43% for the year.
The table below shows more information about PTIX historical price data:
Date High Low High - Low Volume % Change
Sep 30, 2025 $4.07 $3.28 $0.79 341,267.0 -17.15%
Sep 29, 2025 $4.42 $4.00 $0.415 108,856.0 -3.50%
Sep 26, 2025 $4.36 $4.21 $0.1492 40,935.0 +1.18%
Sep 25, 2025 $4.43 $4.03 $0.40 130,991.0 +3.16%
Sep 24, 2025 $4.39 $4.09 $0.30 117,536.0 -5.52%
Sep 23, 2025 $4.55 $4.28 $0.27 139,092.0 -0.46%
Sep 22, 2025 $4.49 $4.10 $0.39 142,036.0 +7.90%
Sep 19, 2025 $4.09 $3.73 $0.359 130,430.0 +5.74%
Sep 18, 2025 $3.94 $3.58 $0.36 80,239.0 +4.08%
Sep 17, 2025 $3.73 $3.36 $0.3698 71,995.0 +8.24%
Sep 16, 2025 $3.47 $3.33 $0.139 45,461.0 +1.80%
Sep 15, 2025 $3.38 $3.22 $0.1631 54,847.0 +3.73%
Sep 12, 2025 $3.34 $3.09 $0.2499 35,303.0 -3.01%
Sep 11, 2025 $3.39 $2.79 $0.6024 204,641.0 +16.08%
Sep 10, 2025 $2.90 $2.83 $0.07 35,480.0 +0.00%
Sep 09, 2025 $2.89 $2.75 $0.14 106,774.0 +0.35%
Sep 08, 2025 $3.10 $2.85 $0.25 146,561.0 -9.52%
Sep 05, 2025 $3.21 $3.10 $0.115 124,235.0 +1.61%
Sep 04, 2025 $3.30 $3.10 $0.20 67,373.0 -4.91%
Sep 03, 2025 $3.60 $3.15 $0.45 153,138.0 -9.19%

Protagenic Therapeutics Inc Stock (PTIX) Year by Year Price History

In this detailed analysis, we present a comprehensive overview of the price movements of Protagenic Therapeutics Inc stock over the years. By exploring the year-by-year data, investors can gain valuable insights into the historical performance and volatility of PTIX shares. From significant milestones and fluctuations to notable trends, this in-depth examination of Protagenic Therapeutics Inc stock price history provides a foundation for understanding how the company's stock has evolved over time.

Protagenic Therapeutics Inc Stock (PTIX) Price History 2025

Month High Low High - Low Volume % Change
Sep, 2025 $4.55 $2.75 $1.80 2,719,175.0 -4.72%
Aug, 2025 $6.20 $2.25 $3.95 166,123,349.0 +22.45%
Jul, 2025 $4.04 $2.90 $1.14 3,192,022.0 -19.45%
Jun, 2025 $4.19 $3.30 $0.89 3,643,345.0 -5.19%
May, 2025 $14.28 $2.35 $11.93 111,013,140.3 +22.77%
Apr, 2025 $8.65 $2.51 $6.15 14,522,063.4 +14.81%
Mar, 2025 $5.88 $2.73 $3.15 1,225,196.4 -36.03%
Feb, 2025 $5.46 $3.36 $2.10 619,657.1 -17.34%
Jan, 2025 $8.67 $5.08 $3.60 461,978.0 -24.69%

Protagenic Therapeutics Inc Stock (PTIX) Price History 2024

Month High Low High - Low Volume % Change
Dec, 2024 $11.20 $6.16 $5.04 511,639.4 -8.97%
Nov, 2024 $15.26 $7.29 $7.97 496,152.1 -9.94%
Oct, 2024 $11.48 $6.86 $4.62 112,060.7 +4.42%
Sep, 2024 $15.54 $7.56 $7.98 993,780.3 +3.49%
Aug, 2024 $11.87 $7.00 $4.87 11,072.6 -14.62%
Jul, 2024 $13.09 $9.80 $3.29 9,859.4 -21.55%
Jun, 2024 $19.32 $12.04 $7.28 14,967.6 -31.44%
May, 2024 $26.18 $17.07 $9.11 32,559.6 -4.13%
Apr, 2024 $25.20 $16.15 $9.05 15,425.0 -21.33%
Mar, 2024 $26.18 $12.46 $13.72 28,383.2 +66.67%
Feb, 2024 $16.80 $11.48 $5.32 8,930.5 +10.53%
Jan, 2024 $14.56 $10.27 $4.29 3,924.2 -4.04%

Protagenic Therapeutics Inc Stock (PTIX) Price History 2023

Month High Low High - Low Volume % Change
Dec, 2023 $17.36 $9.52 $7.84 17,873.7 +32.00%
Nov, 2023 $12.29 $9.94 $2.35 7,366.6 -3.47%
Oct, 2023 $26.04 $10.16 $15.88 46,039.7 -57.77%
Sep, 2023 $27.72 $22.68 $5.04 10,895.9 -3.16%
Aug, 2023 $30.66 $25.27 $5.39 5,632.9 -11.68%
Jul, 2023 $31.08 $27.44 $3.64 3,015.1 +5.97%
Jun, 2023 $29.26 $24.08 $5.18 4,389.2 +2.01%
May, 2023 $32.48 $25.20 $7.28 9,866.3 +6.42%
Apr, 2023 $27.86 $21.56 $6.30 11,664.0 +8.09%
Mar, 2023 $32.06 $17.48 $14.58 24,568.9 +0.51%
Feb, 2023 $34.02 $23.24 $10.78 4,906.3 -20.33%
Jan, 2023 $35.28 $21.96 $13.32 9,918.9 +35.02%
$20.66
price down icon 2.36%
$84.81
price up icon 1.10%
$30.67
price up icon 4.57%
$98.62
price up icon 0.53%
$144.01
price up icon 1.67%
biotechnology ONC
$340.70
price up icon 2.36%
Cap:     |  Volume (24h):