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 — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2021-12-31$77.56$77.564,709
2021-12-30$78.96$78.961,754
2021-12-29$75.60$75.605,470
2021-12-28$85.68$85.681,584
2021-12-27$91.28$91.281,952
2021-12-23$91.28$91.281,298
2021-12-22$89.04$89.041,384
2021-12-21$87.36$87.362,604
2021-12-20$89.04$89.042,295
2021-12-17$90.72$90.722,645
2021-12-16$87.92$87.923,336
2021-12-15$96.88$96.884,884
2021-12-14$90.72$90.724,380
2021-12-13$95.76$95.763,157
2021-12-10$98.56$98.563,821
2021-12-09$104.16$104.166,530
2021-12-08$98.56$98.563,214
2021-12-07$94.08$94.081,323
2021-12-06$92.40$92.402,279
2021-12-03$91.28$91.281,320
2021-12-02$96.32$96.323,655
2021-12-01$96.88$96.883,591
2021-11-30$105.28$105.285,632
2021-11-29$99.68$99.685,457
2021-11-26$99.12$99.121,395
2021-11-24$101.92$101.921,516
2021-11-23$98.56$98.564,404
2021-11-22$98.56$98.561,638
2021-11-19$104.16$104.162,757
2021-11-18$98.56$98.567,691
2021-11-17$104.16$104.162,939
2021-11-16$108.64$108.643,441
2021-11-15$111.44$111.442,668
2021-11-12$115.36$115.362,211
2021-11-11$113.68$113.682,396
2021-11-10$114.24$114.244,723
2021-11-09$119.28$119.287,718
2021-11-08$129.92$129.9223,171
2021-11-05$115.36$115.368,907
2021-11-04$115.36$115.363,104
2021-11-03$114.24$114.244,538
2021-11-02$114.24$114.2411,159
2021-11-01$111.44$111.4411,314
2021-10-29$105.28$105.2820,679
2021-10-28$100.80$100.804,927
2021-10-27$101.36$101.3613,155
2021-10-26$101.92$101.927,157
2021-10-25$106.40$106.4012,096
2021-10-22$105.56$105.564,405
2021-10-21$108.08$108.081,138
2021-10-20$107.24$107.241,163
2021-10-19$106.96$106.961,975
2021-10-18$109.20$109.201,704
2021-10-15$109.20$109.201,486
2021-10-14$109.76$109.762,841
2021-10-13$108.64$108.644,379
2021-10-12$106.96$106.962,229
2021-10-11$108.08$108.086,127
2021-10-08$104.72$104.725,038
2021-10-07$112.00$112.0015,245
2021-10-06$103.04$103.041,130
2021-10-05$105.84$105.843,641
2021-10-04$99.68$99.681,889
2021-10-01$105.28$105.28595
2021-09-30$104.72$104.721,486
2021-09-29$104.16$104.161,245
2021-09-28$109.20$109.201,282
2021-09-27$110.32$110.322,030
2021-09-24$115.92$115.922,193
2021-09-23$110.88$110.88807
2021-09-22$110.32$110.322,520
2021-09-21$108.64$108.641,846
2021-09-20$105.84$105.842,671
2021-09-17$107.52$107.521,666
2021-09-16$108.64$108.64548
2021-09-15$109.20$109.201,329
2021-09-14$107.52$107.522,707
2021-09-13$111.44$111.444,380
2021-09-10$112.00$112.004,005
2021-09-09$110.32$110.325,516
2021-09-08$114.24$114.246,413
2021-09-07$123.20$123.207,291
2021-09-03$120.96$120.968,275
2021-09-02$118.72$118.724,348
2021-09-01$117.04$117.045,098
2021-08-31$118.16$118.166,688
2021-08-30$112.56$112.564,543
2021-08-27$117.04$117.046,889
2021-08-26$114.80$114.806,620
2021-08-25$116.48$116.487,927
2021-08-24$111.44$111.446,698
2021-08-23$115.36$115.3618,638
2021-08-20$106.96$106.9614,214
2021-08-19$105.28$105.2865,193
2021-08-18$104.16$104.1694,448
2021-08-17$100.80$100.8021,745
2021-08-16$98.00$98.007,030
2021-08-13$102.48$102.484,370
2021-08-12$108.08$108.087,432
2021-08-11$111.44$111.4414,329
2021-08-10$109.76$109.7611,768
2021-08-09$126.56$126.5641,486
2021-08-06$110.32$110.325,591
2021-08-05$115.36$115.365,413
2021-08-04$117.04$117.043,989
2021-08-03$122.08$122.08950
2021-08-02$124.88$124.882,780
2021-07-30$120.96$120.96811
2021-07-29$124.88$124.881,702
2021-07-28$126.56$126.564,080
2021-07-27$118.72$118.722,214
2021-07-26$124.88$124.887,213
2021-07-23$137.76$137.765,405
2021-07-22$138.32$138.324,038
2021-07-21$143.92$143.923,438
2021-07-20$130.48$130.483,471
2021-07-19$131.60$131.603,179
2021-07-16$129.92$129.926,093
2021-07-15$136.08$136.083,861
2021-07-14$134.96$134.964,659
2021-07-13$137.20$137.209,421
2021-07-12$155.12$155.123,816
2021-07-09$152.88$152.888,602
2021-07-08$146.16$146.1610,514
2021-07-07$134.40$134.4018,405
2021-07-06$148.40$148.407,771
2021-07-02$151.20$151.2013,188
2021-07-01$151.20$151.2017,154
2021-06-30$161.28$161.2820,159
2021-06-29$164.08$164.0821,859
2021-06-28$171.92$171.9211,523
2021-06-25$176.96$176.9624,441
2021-06-24$174.16$174.1632,745
2021-06-23$171.36$171.3634,370
2021-06-22$155.12$155.1219,952
2021-06-21$155.12$155.1232,284
2021-06-18$164.64$164.64116,204
2021-06-17$188.72$188.72113,232
2021-06-16$174.16$174.1671,807
2021-06-15$169.12$169.1235,496
2021-06-14$165.20$165.2030,341
2021-06-11$166.32$166.32409,227
2021-06-10$149.52$149.5283,957
2021-06-09$132.16$132.1611,752
2021-06-08$141.12$141.124,763
2021-06-07$138.88$138.887,929
2021-06-04$142.24$142.2416,555
2021-06-03$145.60$145.6033,693
2021-06-02$128.80$128.809,063
2021-06-01$126.00$126.0012,852
2021-05-28$124.88$124.8815,686
2021-05-27$135.52$135.5231,275
2021-05-26$150.64$150.64410,729
2021-05-25$152.32$152.3294,089
2021-05-24$118.16$118.1617,359
2021-05-21$120.96$120.966,152
2021-05-20$122.08$122.087,545
2021-05-19$116.48$116.489,521
2021-05-18$120.40$120.4023,546
2021-05-17$115.36$115.368,318
2021-05-14$122.64$122.6428,132
2021-05-13$131.04$131.0428,077
2021-05-12$168.00$168.0053,334
2021-05-11$194.32$194.32576,309
2021-05-10$183.12$183.122,238,705
2021-05-07$119.28$119.2871,814
2021-05-06$105.28$105.282,100
2021-05-05$106.40$106.406,988
2021-05-04$116.48$116.4810,011
2021-05-03$122.64$122.645,357
2021-04-30$126.56$126.564,543
2021-04-29$132.16$132.1614,402
2021-04-28$125.44$125.4413,746
2021-04-27$126.50$126.5055,288