OTC:PTIX | Historical Stock Price | 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.

View year

Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2025-12-31$1.30$1.3074,200
2025-12-30$1.36$1.3649,800
2025-12-29$1.49$1.4959,700
2025-12-26$1.33$1.3368,000
2025-12-24$1.15$1.1545,300
2025-12-23$1.24$1.2411,200
2025-12-22$1.24$1.2460,900
2025-12-19$1.19$1.1949,600
2025-12-18$1.29$1.2970,000
2025-12-17$1.37$1.3756,300
2025-12-16$1.52$1.5243,200
2025-12-15$1.57$1.5743,300
2025-12-12$1.65$1.65114,000
2025-12-11$1.58$1.5843,100
2025-12-10$1.68$1.68100,100
2025-12-09$1.62$1.62564,400
2025-12-08$1.65$1.65180,500
2025-12-05$1.67$1.6783,500
2025-12-04$1.68$1.68126,200
2025-12-03$1.81$1.8154,800
2025-12-02$1.89$1.8985,400
2025-12-01$1.95$1.95151,500
2025-11-28$2.13$2.13128,700
2025-11-26$2.23$2.2385,900
2025-11-25$2.23$2.2389,300
2025-11-24$2.27$2.27113,600
2025-11-21$2.07$2.0756,100
2025-11-20$2.02$2.0248,600
2025-11-19$2.02$2.0269,200
2025-11-18$2.20$2.2026,500
2025-11-17$2.07$2.0736,700
2025-11-14$2.03$2.0323,600
2025-11-13$2.10$2.10223,000
2025-11-12$1.92$1.9226,200
2025-11-11$2.01$2.0147,000
2025-11-10$1.89$1.8987,000
2025-11-07$2.06$2.0644,000
2025-11-06$2.05$2.0590,300
2025-11-05$2.14$2.1429,300
2025-11-04$2.15$2.1532,900
2025-11-03$2.25$2.25252,900
2025-10-31$2.57$2.57111,500
2025-10-30$2.47$2.4738,700
2025-10-29$2.58$2.5880,500
2025-10-28$2.76$2.76127,600
2025-10-27$2.98$2.9829,100
2025-10-24$3.06$3.0632,800
2025-10-23$2.99$2.9955,500
2025-10-22$2.98$2.9862,700
2025-10-21$3.12$3.1229,700
2025-10-20$3.21$3.2145,300
2025-10-17$3.22$3.2277,300
2025-10-16$3.05$3.0550,000
2025-10-15$3.20$3.2058,600
2025-10-14$3.03$3.03135,000
2025-10-13$3.24$3.2458,500
2025-10-10$3.35$3.35163,300
2025-10-09$3.46$3.46114,700
2025-10-08$3.42$3.4257,200
2025-10-07$3.36$3.3623,000
2025-10-06$3.40$3.4063,000
2025-10-03$3.29$3.29141,900
2025-10-02$3.30$3.3074,100
2025-10-01$3.38$3.3877,900
2025-09-30$3.43$3.43341,900
2025-09-29$4.14$4.14110,100
2025-09-26$4.29$4.2941,100
2025-09-25$4.24$4.24135,200
2025-09-24$4.11$4.11127,600
2025-09-23$4.35$4.35139,500
2025-09-22$4.37$4.37143,000
2025-09-19$4.05$4.05135,900
2025-09-18$3.83$3.8380,900
2025-09-17$3.68$3.6881,200
2025-09-16$3.40$3.4048,000
2025-09-15$3.34$3.3457,100
2025-09-12$3.22$3.2235,300
2025-09-11$3.32$3.32204,700
2025-09-10$2.86$2.8635,500
2025-09-09$2.86$2.86107,700
2025-09-08$2.85$2.85147,300
2025-09-05$3.15$3.15129,600
2025-09-04$3.10$3.1068,500
2025-09-03$3.26$3.26153,300
2025-09-02$3.59$3.59107,400
2025-08-29$3.60$3.60154,400
2025-08-28$3.55$3.55258,200
2025-08-27$3.90$3.90227,300
2025-08-26$3.97$3.97675,800
2025-08-25$4.51$4.512,945,100
2025-08-22$4.24$4.242,384,400
2025-08-21$4.26$4.26158,867,900
2025-08-20$2.28$2.2866,200
2025-08-19$2.56$2.5659,500
2025-08-18$2.78$2.7850,100
2025-08-15$2.93$2.9383,200
2025-08-14$3.07$3.07494,700
2025-08-13$2.78$2.7896,500
2025-08-12$2.75$2.7538,400
2025-08-11$2.80$2.8019,700
2025-08-08$2.83$2.8341,500
2025-08-07$2.82$2.8232,500
2025-08-06$2.88$2.88113,500
2025-08-05$3.04$3.04194,700
2025-08-04$2.69$2.6943,200
2025-08-01$2.72$2.7290,100
2025-07-31$2.94$2.9492,200
2025-07-30$3.19$3.19217,900
2025-07-29$3.07$3.0766,600
2025-07-28$3.28$3.2833,900
2025-07-25$3.26$3.2626,900
2025-07-24$3.24$3.24116,200
2025-07-23$3.37$3.37151,500
2025-07-22$3.34$3.34112,900
2025-07-21$3.18$3.18151,500
2025-07-18$3.42$3.42122,000
2025-07-17$3.53$3.5391,800
2025-07-16$3.45$3.45105,700
2025-07-15$3.48$3.48171,200
2025-07-14$3.57$3.57101,500
2025-07-11$3.69$3.69214,200
2025-07-10$3.74$3.74443,400
2025-07-09$3.83$3.83373,700
2025-07-08$3.43$3.43244,500
2025-07-07$3.39$3.3974,600
2025-07-03$3.46$3.46140,800
2025-07-02$3.48$3.48235,000
2025-07-01$3.54$3.54137,300
2025-06-30$3.65$3.65213,600
2025-06-27$3.70$3.70146,200
2025-06-26$3.87$3.87545,500
2025-06-25$3.66$3.66139,600
2025-06-24$3.66$3.66119,400
2025-06-23$3.57$3.57237,300
2025-06-20$3.56$3.5686,200
2025-06-18$3.44$3.4460,600
2025-06-17$3.52$3.52305,100
2025-06-16$3.39$3.3958,100
2025-06-13$3.32$3.3262,100
2025-06-12$3.52$3.5273,700
2025-06-11$3.53$3.5397,400
2025-06-10$3.54$3.54121,300
2025-06-09$3.64$3.64155,800
2025-06-06$3.62$3.6295,200
2025-06-05$3.49$3.49224,000
2025-06-04$3.80$3.80321,300
2025-06-03$3.67$3.67360,600
2025-06-02$3.80$3.80323,900
2025-05-30$3.85$3.85684,100
2025-05-29$3.81$3.81259,000
2025-05-28$4.00$4.00991,500
2025-05-27$3.94$3.94582,200
2025-05-23$4.76$4.76670,900
2025-05-22$5.37$5.37922,100
2025-05-21$6.14$6.141,280,900
2025-05-20$6.88$6.884,007,900
2025-05-19$11.10$11.1097,394,300
2025-05-16$3.03$3.0378,600
2025-05-15$3.12$3.12201,700
2025-05-14$3.28$3.2870,500
2025-05-13$3.51$3.51205,800
2025-05-12$3.06$3.0683,200
2025-05-09$3.11$3.11259,800
2025-05-08$3.50$3.50755,000
2025-05-07$3.04$3.04127,100
2025-05-06$3.28$3.282,638,900
2025-05-05$2.85$2.85481,900
2025-05-02$3.14$3.1419,579
2025-05-01$3.40$3.4026,557
2025-04-30$3.14$3.1450,493
2025-04-29$3.05$3.0545,857
2025-04-28$3.05$3.0510,457
2025-04-25$3.05$3.0512,443
2025-04-24$3.01$3.0124,457
2025-04-23$3.18$3.1810,507
2025-04-22$3.16$3.167,086
2025-04-21$2.93$2.9319,414
2025-04-17$3.36$3.3615,471
2025-04-16$3.60$3.609,436
2025-04-15$4.03$4.0314,371
2025-04-14$4.33$4.3319,671
2025-04-11$4.20$4.2020,843
2025-04-10$3.63$3.6311,350
2025-04-09$3.74$3.7445,721
2025-04-08$3.84$3.8464,957
2025-04-07$4.45$4.4571,186
2025-04-04$5.43$5.43347,986
2025-04-03$5.85$5.8512,873,836
2025-04-02$3.18$3.181,341,836
2025-04-01$3.50$3.5049,964
2025-03-31$2.73$2.739,393
2025-03-28$3.15$3.155,071
2025-03-27$3.50$3.501,786
2025-03-26$3.68$3.683,771
2025-03-25$3.77$3.771,329
2025-03-24$3.65$3.656,171
2025-03-21$3.91$3.918,350
2025-03-20$3.58$3.583,321
2025-03-19$3.50$3.507,136
2025-03-18$3.64$3.645,557
2025-03-17$3.88$3.884,736
2025-03-14$3.70$3.7027,236
2025-03-13$3.86$3.8666,164
2025-03-12$3.84$3.8413,336
2025-03-11$3.79$3.7935,071
2025-03-10$3.89$3.8927,171
2025-03-07$4.51$4.5130,557
2025-03-06$5.11$5.11121,671
2025-03-05$4.68$4.68175,650
2025-03-04$5.15$5.156,651,236
2025-03-03$3.86$3.86694,014
2025-02-28$4.27$4.2741,464
2025-02-27$4.03$4.0366,000
2025-02-26$3.60$3.603,564
2025-02-25$3.36$3.3611,650
2025-02-24$3.75$3.755,386
2025-02-21$3.72$3.724,607
2025-02-20$3.64$3.642,421
2025-02-19$3.54$3.549,514
2025-02-18$3.74$3.7416,000
2025-02-14$3.75$3.7519,614
2025-02-13$3.85$3.8516,871
2025-02-12$3.75$3.759,950
2025-02-11$3.77$3.7723,500
2025-02-10$3.60$3.609,757
2025-02-07$3.82$3.8214,179
2025-02-06$3.81$3.8156,629
2025-02-05$5.25$5.25296,643
2025-02-04$4.69$4.6926,171
2025-02-03$5.32$5.323,507
2025-01-31$5.17$5.1711,343
2025-01-30$5.35$5.3529,914
2025-01-29$5.85$5.8541,364
2025-01-28$6.54$6.54124,293
2025-01-27$7.10$7.10121,636
2025-01-24$6.23$6.2312,293
2025-01-23$5.88$5.884,143
2025-01-22$5.73$5.733,107
2025-01-21$5.61$5.617,164
2025-01-17$6.15$6.152,986
2025-01-16$6.27$6.272,164
2025-01-15$6.43$6.4312,486
2025-01-14$6.57$6.5713,107
2025-01-13$6.57$6.579,029
2025-01-10$6.72$6.7232,586
2025-01-08$7.67$7.678,914
2025-01-07$7.98$7.987,171
2025-01-06$8.26$8.2620,271
2025-01-03$7.08$7.085,564
2025-01-02$7.28$7.289,279