OTC:CYAN | Historical Stock Price | CYANOTECH CORP

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
1991-05-21 to 2026-08-27
Data captured

Stock Price Chart

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

$0.23$0.69$2.06$6.21$18.69$56.241991-05-212026-08-27

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

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Historical Stock Price — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
1991-12-31$1.00$1.00125
1991-12-30$1.00$1.004,200
1991-12-27$1.00$1.002,675
1991-12-26$1.00$1.000
1991-12-24$1.00$1.00275
1991-12-23$1.00$1.00350
1991-12-20$1.00$1.00225
1991-12-19$1.00$1.00450
1991-12-18$1.00$1.001,625
1991-12-17$1.25$1.25775
1991-12-16$1.25$1.25200
1991-12-13$1.25$1.251,650
1991-12-12$1.25$1.25175
1991-12-11$1.25$1.25950
1991-12-10$1.25$1.2550
1991-12-09$1.25$1.25350
1991-12-06$1.25$1.251,500
1991-12-05$1.25$1.252,375
1991-12-04$1.25$1.252,100
1991-12-03$1.25$1.25250
1991-12-02$1.25$1.250
1991-11-29$1.25$1.25500
1991-11-27$1.25$1.250
1991-11-26$1.25$1.252,325
1991-11-25$1.25$1.250
1991-11-22$1.25$1.25675
1991-11-21$1.25$1.25175
1991-11-20$1.25$1.25325
1991-11-19$1.25$1.254,025
1991-11-18$1.75$1.75775
1991-11-15$1.75$1.750
1991-11-14$1.75$1.750
1991-11-13$1.75$1.75600
1991-11-12$1.75$1.750
1991-11-11$1.75$1.756,000
1991-11-08$2.25$2.25225
1991-11-07$2.25$2.25500
1991-11-06$2.13$2.130
1991-11-05$2.13$2.130
1991-11-04$2.13$2.130
1991-11-01$2.13$2.13100
1991-10-31$2.13$2.1375
1991-10-30$2.13$2.1375
1991-10-29$2.13$2.1350
1991-10-28$2.13$2.130
1991-10-25$2.13$2.1350
1991-10-24$2.13$2.13200
1991-10-23$2.13$2.1350
1991-10-22$2.25$2.25825
1991-10-21$2.25$2.250
1991-10-18$2.25$2.25675
1991-10-17$2.25$2.252,000
1991-10-16$2.25$2.252,500
1991-10-15$2.00$2.00150
1991-10-14$2.00$2.001,250
1991-10-11$2.00$2.001,050
1991-10-10$2.00$2.00425
1991-10-09$1.50$1.50250
1991-10-08$1.50$1.500
1991-10-07$1.50$1.500
1991-10-04$1.50$1.5025
1991-10-03$1.50$1.503,100
1991-10-02$2.50$2.500
1991-10-01$2.50$2.500
1991-09-30$2.50$2.500
1991-09-27$2.50$2.50100
1991-09-26$2.50$2.500
1991-09-25$2.50$2.50250
1991-09-24$2.50$2.501,000
1991-09-23$2.50$2.500
1991-09-20$2.50$2.50750
1991-09-19$2.50$2.500
1991-09-18$2.50$2.500
1991-09-17$2.50$2.500
1991-09-16$2.50$2.5050
1991-09-13$2.50$2.50650
1991-09-12$2.50$2.5050
1991-09-11$2.50$2.50150
1991-09-10$2.50$2.502,700
1991-09-09$2.75$2.752,950
1991-09-06$2.75$2.75100
1991-09-05$2.75$2.750
1991-09-04$2.75$2.75575
1991-09-03$2.75$2.75925
1991-08-30$2.75$2.750
1991-08-29$2.75$2.751,600
1991-08-28$3.00$3.000
1991-08-27$3.00$3.000
1991-08-26$3.00$3.000
1991-08-23$3.00$3.000
1991-08-22$3.00$3.00125
1991-08-21$3.00$3.000
1991-08-20$3.00$3.00100
1991-08-19$3.00$3.000
1991-08-16$3.00$3.001,625
1991-08-15$3.00$3.000
1991-08-14$3.00$3.001,950
1991-08-13$3.00$3.000
1991-08-12$3.00$3.000
1991-08-09$3.00$3.00500
1991-08-08$3.00$3.001,000
1991-08-07$3.50$3.501,250
1991-08-06$3.00$3.001,550
1991-08-05$3.50$3.50550
1991-08-02$3.50$3.5050
1991-08-01$3.75$3.750
1991-07-31$3.75$3.752,700
1991-07-30$4.00$4.000
1991-07-29$4.00$4.001,600
1991-07-26$4.00$4.000
1991-07-25$4.00$4.00325
1991-07-24$4.00$4.00125
1991-07-23$4.00$4.00100
1991-07-22$4.25$4.25250
1991-07-19$4.25$4.251,325
1991-07-18$4.25$4.2550
1991-07-17$4.25$4.25625
1991-07-16$4.00$4.004,275
1991-07-15$4.00$4.001,400
1991-07-12$3.75$3.75100
1991-07-11$3.50$3.500
1991-07-10$3.50$3.500
1991-07-09$3.50$3.501,075
1991-07-08$3.50$3.50800
1991-07-05$3.50$3.501,500
1991-07-03$3.50$3.500
1991-07-02$3.50$3.5050
1991-07-01$3.50$3.50675
1991-06-28$3.50$3.500
1991-06-27$3.50$3.500
1991-06-26$3.50$3.500
1991-06-25$3.50$3.500
1991-06-24$3.50$3.50950
1991-06-21$3.50$3.501,000
1991-06-20$3.50$3.505,875
1991-06-19$3.25$3.25300
1991-06-18$3.25$3.25750
1991-06-17$3.00$3.00225
1991-06-14$2.50$2.500
1991-06-13$2.50$2.501,000
1991-06-12$2.50$2.502,425
1991-06-11$2.50$2.50200
1991-06-10$2.50$2.500
1991-06-07$2.50$2.500
1991-06-06$2.50$2.500
1991-06-05$2.50$2.50475
1991-06-04$2.50$2.500
1991-06-03$2.50$2.50275
1991-05-31$2.50$2.500
1991-05-30$2.50$2.50750
1991-05-29$2.50$2.50375
1991-05-28$2.50$2.50225
1991-05-24$2.50$2.500
1991-05-23$2.50$2.50375
1991-05-22$2.50$2.500
1991-05-21$2.50$2.50375