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 — 2020

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2020-12-31$3.04$3.043,100
2020-12-30$2.98$2.9822,600
2020-12-29$2.97$2.9738,400
2020-12-28$3.04$3.0410,700
2020-12-24$3.03$3.033,300
2020-12-23$2.95$2.958,900
2020-12-22$2.97$2.978,600
2020-12-21$2.97$2.975,200
2020-12-18$3.02$3.0217,700
2020-12-17$3.10$3.1012,400
2020-12-16$3.12$3.128,300
2020-12-15$3.10$3.106,400
2020-12-14$3.14$3.1415,800
2020-12-11$3.09$3.095,700
2020-12-10$3.05$3.0513,500
2020-12-09$3.17$3.1722,200
2020-12-08$3.08$3.0810,800
2020-12-07$3.03$3.0320,000
2020-12-04$3.03$3.0330,600
2020-12-03$3.03$3.03271,100
2020-12-02$2.82$2.8289,600
2020-12-01$2.78$2.7844,600
2020-11-30$2.88$2.8825,100
2020-11-27$2.75$2.7530,900
2020-11-25$2.70$2.704,700
2020-11-24$2.65$2.6512,700
2020-11-23$2.55$2.5531,200
2020-11-20$2.54$2.5416,800
2020-11-19$2.54$2.5431,800
2020-11-18$2.63$2.635,000
2020-11-17$2.71$2.7116,200
2020-11-16$2.68$2.6819,000
2020-11-13$2.70$2.7012,600
2020-11-12$2.80$2.8010,700
2020-11-11$2.98$2.981,400
2020-11-10$2.94$2.946,700
2020-11-09$2.69$2.6910,200
2020-11-06$2.86$2.8614,700
2020-11-05$3.05$3.0523,500
2020-11-04$2.87$2.873,200
2020-11-03$2.92$2.922,900
2020-11-02$3.08$3.0811,800
2020-10-30$2.83$2.83500
2020-10-29$2.93$2.93600
2020-10-28$2.76$2.766,000
2020-10-27$3.02$3.021,400
2020-10-26$2.79$2.79900
2020-10-23$2.82$2.826,900
2020-10-22$2.89$2.891,900
2020-10-21$3.03$3.031,900
2020-10-20$2.96$2.961,300
2020-10-19$3.01$3.011,800
2020-10-16$2.90$2.901,900
2020-10-15$3.05$3.052,500
2020-10-14$2.88$2.889,900
2020-10-13$2.98$2.9832,500
2020-10-12$3.02$3.0268,500
2020-10-09$2.56$2.566,300
2020-10-08$2.55$2.554,100
2020-10-07$2.50$2.50800
2020-10-06$2.56$2.561,900
2020-10-05$2.46$2.46300
2020-10-02$2.52$2.522,500
2020-10-01$2.58$2.584,800
2020-09-30$2.45$2.451,900
2020-09-29$2.60$2.60900
2020-09-28$2.57$2.571,400
2020-09-25$2.57$2.571,300
2020-09-24$2.56$2.561,000
2020-09-23$2.70$2.70700
2020-09-22$2.65$2.651,200
2020-09-21$2.69$2.691,400
2020-09-18$2.68$2.6817,400
2020-09-17$2.61$2.615,100
2020-09-16$2.83$2.834,700
2020-09-15$2.98$2.9812,900
2020-09-14$3.01$3.017,400
2020-09-11$3.07$3.079,200
2020-09-10$3.12$3.1236,300
2020-09-09$2.88$2.8822,000
2020-09-08$2.85$2.8543,800
2020-09-04$2.65$2.6519,200
2020-09-03$2.62$2.6225,600
2020-09-02$2.85$2.8578,900
2020-09-01$2.53$2.536,600
2020-08-31$2.28$2.2818,200
2020-08-28$2.30$2.305,000
2020-08-27$2.38$2.383,200
2020-08-26$2.33$2.331,600
2020-08-25$2.34$2.341,700
2020-08-24$2.35$2.35800
2020-08-21$2.33$2.334,100
2020-08-20$2.35$2.351,800
2020-08-19$2.35$2.35800
2020-08-18$2.40$2.401,900
2020-08-17$2.32$2.321,200
2020-08-14$2.36$2.362,200
2020-08-13$2.34$2.3417,500
2020-08-12$2.33$2.336,400
2020-08-11$2.35$2.3530,300
2020-08-10$2.52$2.523,000
2020-08-07$2.43$2.431,900
2020-08-06$2.47$2.472,000
2020-08-05$2.35$2.3568,800
2020-08-04$2.43$2.4311,700
2020-08-03$2.40$2.4014,300
2020-07-31$2.20$2.202,400
2020-07-30$2.19$2.194,200
2020-07-29$2.21$2.2110,300
2020-07-28$2.18$2.183,200
2020-07-27$2.18$2.187,300
2020-07-24$2.18$2.185,000
2020-07-23$2.18$2.1810,600
2020-07-22$2.21$2.216,800
2020-07-21$2.22$2.224,900
2020-07-20$2.21$2.217,300
2020-07-17$2.28$2.2812,300
2020-07-16$2.20$2.201,500
2020-07-15$2.30$2.305,700
2020-07-14$2.21$2.216,100
2020-07-13$2.25$2.251,700
2020-07-10$2.38$2.381,000
2020-07-09$2.39$2.391,600
2020-07-08$2.29$2.290
2020-07-07$2.29$2.292,500
2020-07-06$2.29$2.294,300
2020-07-02$2.37$2.3720,100
2020-07-01$2.47$2.4734,200
2020-06-30$2.33$2.33700
2020-06-29$2.34$2.34700
2020-06-26$2.33$2.333,600
2020-06-25$2.47$2.475,100
2020-06-24$2.45$2.4533,400
2020-06-23$2.67$2.67118,600
2020-06-22$2.51$2.517,600
2020-06-19$2.59$2.5915,800
2020-06-18$2.37$2.372,100
2020-06-17$2.47$2.4712,300
2020-06-16$2.43$2.4328,400
2020-06-15$2.30$2.302,100
2020-06-12$2.38$2.3810,900
2020-06-11$2.40$2.408,300
2020-06-10$2.30$2.3033,700
2020-06-09$2.07$2.075,600
2020-06-08$2.09$2.09900
2020-06-05$2.07$2.072,600
2020-06-04$2.14$2.142,100
2020-06-03$2.15$2.153,300
2020-06-02$2.15$2.155,700
2020-06-01$2.02$2.023,000
2020-05-29$2.10$2.106,600
2020-05-28$2.07$2.071,100
2020-05-27$2.15$2.152,000
2020-05-26$2.14$2.147,900
2020-05-22$2.10$2.102,800
2020-05-21$2.10$2.101,900
2020-05-20$2.09$2.093,900
2020-05-19$2.04$2.044,300
2020-05-18$2.11$2.1125,100
2020-05-15$2.36$2.361,100
2020-05-14$2.16$2.161,600
2020-05-13$2.25$2.256,300
2020-05-12$2.23$2.23800
2020-05-11$2.21$2.213,200
2020-05-08$2.30$2.301,100
2020-05-07$2.30$2.301,400
2020-05-06$2.28$2.281,400
2020-05-05$2.29$2.296,000
2020-05-04$2.29$2.296,300
2020-05-01$2.25$2.257,700
2020-04-30$2.21$2.21600
2020-04-29$2.19$2.19400
2020-04-28$2.18$2.182,800
2020-04-27$2.28$2.283,500
2020-04-24$2.15$2.151,100
2020-04-23$2.19$2.194,400
2020-04-22$2.20$2.201,800
2020-04-21$2.17$2.172,900
2020-04-20$2.15$2.152,500
2020-04-17$2.18$2.18500
2020-04-16$2.17$2.1716,700
2020-04-15$2.02$2.029,900
2020-04-14$2.18$2.186,500
2020-04-13$2.17$2.171,600
2020-04-09$2.21$2.214,900
2020-04-08$2.18$2.182,700
2020-04-07$2.17$2.172,200
2020-04-06$2.07$2.0711,000
2020-04-03$2.22$2.22500
2020-04-02$2.32$2.323,100
2020-04-01$2.03$2.038,000
2020-03-31$2.06$2.061,600
2020-03-30$2.00$2.005,800
2020-03-27$1.99$1.992,900
2020-03-26$1.99$1.991,700
2020-03-25$2.06$2.067,600
2020-03-24$2.08$2.081,800
2020-03-23$2.01$2.012,500
2020-03-20$2.06$2.064,100
2020-03-19$1.91$1.913,100
2020-03-18$1.90$1.903,900
2020-03-17$1.90$1.9017,900
2020-03-16$2.05$2.057,000
2020-03-13$2.00$2.002,800
2020-03-12$2.24$2.245,100
2020-03-11$1.99$1.994,200
2020-03-10$1.98$1.9814,600
2020-03-09$2.08$2.0820,700
2020-03-06$2.06$2.063,800
2020-03-05$2.13$2.132,100
2020-03-04$2.17$2.173,200
2020-03-03$2.11$2.1129,500
2020-03-02$2.32$2.327,800
2020-02-28$2.35$2.3554,100
2020-02-27$2.62$2.62256,000
2020-02-26$2.25$2.25217,300
2020-02-25$2.25$2.251,600
2020-02-24$2.07$2.0715,800
2020-02-21$2.12$2.123,100
2020-02-20$2.12$2.124,000
2020-02-19$2.09$2.094,100
2020-02-18$2.11$2.11900
2020-02-14$2.13$2.131,300
2020-02-13$2.13$2.1311,200
2020-02-12$2.09$2.096,400
2020-02-11$2.09$2.0929,300
2020-02-10$2.42$2.424,300
2020-02-07$2.40$2.40400
2020-02-06$2.49$2.498,200
2020-02-05$2.50$2.5013,400
2020-02-04$2.47$2.4716,300
2020-02-03$2.42$2.4217,100
2020-01-31$2.45$2.4521,800
2020-01-30$2.45$2.4513,800
2020-01-29$2.42$2.4213,600
2020-01-28$2.43$2.433,700
2020-01-27$2.40$2.401,800
2020-01-24$2.48$2.481,000
2020-01-23$2.50$2.504,300
2020-01-22$2.50$2.502,000
2020-01-21$2.56$2.565,000
2020-01-17$2.53$2.532,000
2020-01-16$2.53$2.5315,900
2020-01-15$2.49$2.492,500
2020-01-14$2.50$2.500
2020-01-13$2.50$2.5012,100
2020-01-10$2.40$2.401,000
2020-01-09$2.40$2.40300
2020-01-08$2.37$2.37600
2020-01-07$2.37$2.37900
2020-01-06$2.42$2.4213,700
2020-01-03$2.35$2.351,900
2020-01-02$2.29$2.290