OTC:PTIX | Stock Price History | Protagenic Therapeutics, Inc.\new

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2021-04-27 to 2026-08-27
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.16$0.66$2.75$11.44$47.61$198.162021-04-272026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2026-08-27$0.94$0.9436,600
2026-08-26$0.89$0.8918,000
2026-08-25$0.95$0.9543,400
2026-08-24$1.09$1.09115,600
2026-08-21$0.80$0.80140,600
2026-08-20$0.60$0.6040,700
2026-08-19$0.35$0.354,100
2026-08-18$0.36$0.360
2026-08-17$0.36$0.360
2026-08-14$0.36$0.362,500
2026-08-13$0.36$0.360
2026-08-12$0.36$0.36300
2026-08-11$0.32$0.324,700
2026-08-10$0.35$0.3548,200
2026-08-07$0.31$0.31100
2026-08-06$0.22$0.224,000
2026-08-05$0.26$0.269,000
2026-08-04$0.21$0.212,600
2026-08-03$0.18$0.18400
2026-07-31$0.18$0.182,800
2026-07-30$0.17$0.1728,200
2026-07-29$0.13$0.13500
2026-07-28$0.14$0.1434,300
2026-07-27$0.22$0.2241,600
2026-07-24$0.22$0.220
2026-07-23$0.22$0.220
2026-07-22$0.22$0.220
2026-07-21$0.22$0.222,300
2026-07-20$0.26$0.260
2026-07-17$0.26$0.260
2026-07-16$0.26$0.260
2026-07-15$0.26$0.260
2026-07-14$0.26$0.260
2026-07-13$0.26$0.26300
2026-07-10$0.26$0.267,500
2026-07-09$0.22$0.2234,100
2026-07-08$0.19$0.194,100
2026-07-07$0.20$0.208,900
2026-07-06$0.22$0.222,500
2026-07-02$0.23$0.23102,500
2026-07-01$0.35$0.352,000
2026-06-30$0.39$0.390
2026-06-29$0.39$0.3911,100
2026-06-26$0.36$0.360
2026-06-25$0.36$0.36600
2026-06-24$0.36$0.363,000
2026-06-23$0.45$0.450
2026-06-22$0.45$0.459,200
2026-06-18$0.41$0.41200
2026-06-17$0.41$0.412,300
2026-06-16$0.41$0.4113,100
2026-06-15$0.40$0.403,000
2026-06-12$0.50$0.5058,500
2026-06-11$0.68$0.68500
2026-06-10$0.54$0.545,100
2026-06-09$0.53$0.532,400
2026-06-08$0.53$0.53500
2026-06-05$0.50$0.50500
2026-06-04$0.50$0.506,900
2026-06-03$0.53$0.53600
2026-06-02$0.50$0.504,200
2026-06-01$0.50$0.504,700
2026-05-29$0.54$0.540
2026-05-28$0.54$0.542,000
2026-05-27$0.52$0.523,200
2026-05-26$0.55$0.556,400
2026-05-22$0.62$0.620
2026-05-21$0.62$0.62200
2026-05-20$0.65$0.654,100
2026-05-19$0.65$0.650
2026-05-18$0.65$0.65400
2026-05-15$0.65$0.65700
2026-05-14$0.65$0.65300
2026-05-13$0.49$0.49400
2026-05-12$0.48$0.4834,100
2026-05-11$0.65$0.655,600
2026-05-08$0.79$0.797,600
2026-05-07$0.58$0.582,900
2026-05-06$0.55$0.55200
2026-05-05$0.54$0.5411,000
2026-05-04$0.72$0.72400
2026-05-01$0.80$0.803,400
2026-04-30$0.88$0.882,100
2026-04-29$0.88$0.8811,400
2026-04-28$1.08$1.0832,200
2026-04-27$0.97$0.9735,900
2026-04-24$0.81$0.8121,300
2026-04-23$0.72$0.7213,100
2026-04-22$0.69$0.693,100
2026-04-21$0.66$0.6614,900
2026-04-20$0.55$0.556,300
2026-04-17$0.57$0.572,400
2026-04-16$0.56$0.561,700
2026-04-15$0.53$0.534,700
2026-04-14$0.56$0.561,500
2026-04-13$0.55$0.555,500
2026-04-10$0.59$0.591,400
2026-04-09$0.69$0.690
2026-04-08$0.69$0.699,500
2026-04-07$0.53$0.532,600