OTC:CYAN | Stock Price History | 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.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2026-08-27$0.45$0.450
2026-08-26$0.45$0.45500
2026-08-25$0.45$0.4519,300
2026-08-24$0.45$0.450
2026-08-21$0.45$0.450
2026-08-20$0.45$0.450
2026-08-19$0.45$0.450
2026-08-18$0.45$0.459,300
2026-08-17$0.49$0.490
2026-08-14$0.49$0.49500
2026-08-13$0.46$0.461,400
2026-08-12$0.46$0.460
2026-08-11$0.46$0.463,700
2026-08-10$0.53$0.53100
2026-08-07$0.53$0.531,900
2026-08-06$0.49$0.49700
2026-08-05$0.53$0.53800
2026-08-04$0.53$0.530
2026-08-03$0.53$0.530
2026-07-31$0.53$0.530
2026-07-30$0.53$0.530
2026-07-29$0.53$0.531,000
2026-07-28$0.53$0.530
2026-07-27$0.53$0.530
2026-07-24$0.53$0.530
2026-07-23$0.53$0.530
2026-07-22$0.53$0.530
2026-07-21$0.53$0.5312,000
2026-07-20$0.53$0.531,500
2026-07-17$0.53$0.530
2026-07-16$0.53$0.534,900
2026-07-15$0.51$0.51200
2026-07-14$0.53$0.531,100
2026-07-13$0.49$0.493,800
2026-07-10$0.53$0.538,400
2026-07-09$0.52$0.521,000
2026-07-08$0.52$0.521,000
2026-07-07$0.52$0.521,000
2026-07-06$0.49$0.490
2026-07-02$0.49$0.490
2026-07-01$0.49$0.49100
2026-06-30$0.43$0.431,000
2026-06-29$0.52$0.520
2026-06-26$0.52$0.520
2026-06-25$0.52$0.521,500
2026-06-24$0.52$0.520
2026-06-23$0.52$0.529,700
2026-06-22$0.39$0.390
2026-06-18$0.39$0.390
2026-06-17$0.39$0.390
2026-06-16$0.39$0.390
2026-06-15$0.39$0.39100
2026-06-12$0.40$0.400
2026-06-11$0.40$0.404,000
2026-06-10$0.39$0.394,500
2026-06-09$0.44$0.440
2026-06-08$0.44$0.440
2026-06-05$0.44$0.440
2026-06-04$0.44$0.440
2026-06-03$0.44$0.440
2026-06-02$0.44$0.440
2026-06-01$0.44$0.44300
2026-05-29$0.37$0.37300
2026-05-28$0.52$0.520
2026-05-27$0.52$0.520
2026-05-26$0.52$0.523,500
2026-05-22$0.52$0.52500
2026-05-21$0.52$0.520
2026-05-20$0.52$0.520
2026-05-19$0.52$0.520
2026-05-18$0.52$0.520
2026-05-15$0.52$0.524,200
2026-05-14$0.55$0.550
2026-05-13$0.55$0.550
2026-05-12$0.55$0.551,300
2026-05-11$0.41$0.413,400
2026-05-08$0.39$0.390
2026-05-07$0.39$0.390
2026-05-06$0.39$0.390
2026-05-05$0.39$0.390
2026-05-04$0.39$0.390
2026-05-01$0.39$0.390
2026-04-30$0.39$0.390
2026-04-29$0.39$0.390
2026-04-28$0.39$0.390
2026-04-27$0.39$0.390
2026-04-24$0.39$0.390
2026-04-23$0.39$0.390
2026-04-22$0.39$0.39900
2026-04-21$0.38$0.38400
2026-04-20$0.33$0.331,100
2026-04-17$0.33$0.33100
2026-04-16$0.39$0.392,200
2026-04-15$0.39$0.399,300
2026-04-14$0.34$0.340
2026-04-13$0.34$0.349,000
2026-04-10$0.32$0.32400
2026-04-09$0.39$0.393,700
2026-04-08$0.30$0.301,100
2026-04-07$0.30$0.3018,000