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 — 2009

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2009-12-31$5.29$5.2913,200
2009-12-30$5.26$5.2632,200
2009-12-29$5.34$5.3432,900
2009-12-28$4.74$4.7425,300
2009-12-24$4.68$4.683,700
2009-12-23$4.45$4.4550,400
2009-12-22$4.81$4.8146,400
2009-12-21$5.00$5.00174,300
2009-12-18$5.13$5.13126,100
2009-12-17$5.68$5.68110,700
2009-12-16$5.50$5.5064,400
2009-12-15$4.92$4.9255,700
2009-12-14$4.90$4.9081,200
2009-12-11$4.40$4.4057,000
2009-12-10$4.10$4.1021,500
2009-12-09$4.01$4.0123,200
2009-12-08$3.96$3.9615,900
2009-12-07$3.90$3.9095,500
2009-12-04$3.78$3.7829,000
2009-12-03$3.70$3.7075,500
2009-12-02$3.74$3.7436,800
2009-12-01$3.70$3.7035,600
2009-11-30$3.56$3.5670,200
2009-11-27$3.37$3.3716,800
2009-11-25$3.35$3.3514,800
2009-11-24$3.23$3.2379,900
2009-11-23$3.47$3.47116,000
2009-11-20$2.83$2.833,700
2009-11-19$2.76$2.7611,700
2009-11-18$2.85$2.8527,600
2009-11-17$2.70$2.708,900
2009-11-16$2.76$2.7616,400
2009-11-13$2.85$2.8542,000
2009-11-12$2.74$2.7456,600
2009-11-11$2.28$2.283,700
2009-11-10$2.37$2.37500
2009-11-09$2.35$2.353,300
2009-11-06$2.34$2.34600
2009-11-05$2.40$2.402,000
2009-11-04$2.37$2.371,700
2009-11-03$2.25$2.2532,000
2009-11-02$2.24$2.2432,300
2009-10-30$2.40$2.402,800
2009-10-29$2.40$2.402,900
2009-10-28$2.35$2.354,700
2009-10-27$2.30$2.3012,700
2009-10-26$2.33$2.3310,500
2009-10-23$2.41$2.4111,000
2009-10-22$2.54$2.541,200
2009-10-21$2.60$2.6012,900
2009-10-20$2.66$2.661,200
2009-10-19$2.70$2.701,100
2009-10-16$2.71$2.715,000
2009-10-15$2.52$2.52300
2009-10-14$2.53$2.532,000
2009-10-13$2.71$2.713,900
2009-10-12$2.51$2.5110,700
2009-10-09$2.76$2.762,500
2009-10-08$2.76$2.769,200
2009-10-07$2.71$2.715,200
2009-10-06$2.67$2.6710,700
2009-10-05$2.35$2.35400
2009-10-02$2.33$2.3310,900
2009-10-01$2.49$2.495,500
2009-09-30$2.64$2.64400
2009-09-29$2.65$2.651,200
2009-09-28$2.65$2.653,800
2009-09-25$2.61$2.617,200
2009-09-24$2.68$2.685,300
2009-09-23$2.77$2.772,400
2009-09-22$2.77$2.774,100
2009-09-21$2.81$2.811,100
2009-09-18$2.84$2.843,900
2009-09-17$2.84$2.8427,700
2009-09-16$2.76$2.7635,800
2009-09-15$2.55$2.5510,100
2009-09-14$2.61$2.6119,900
2009-09-11$2.51$2.515,100
2009-09-10$2.53$2.5330,700
2009-09-09$2.65$2.6534,600
2009-09-08$2.43$2.43400
2009-09-04$2.44$2.442,400
2009-09-03$2.42$2.424,400
2009-09-02$2.38$2.381,400
2009-09-01$2.32$2.322,500
2009-08-31$2.40$2.4023,200
2009-08-28$2.45$2.457,000
2009-08-27$2.43$2.438,400
2009-08-26$2.41$2.416,700
2009-08-25$2.43$2.4310,200
2009-08-24$2.55$2.557,500
2009-08-21$2.59$2.596,700
2009-08-20$2.53$2.5372,400
2009-08-19$2.36$2.367,800
2009-08-18$2.28$2.2816,300
2009-08-17$2.34$2.3430,500
2009-08-14$2.39$2.3960,200
2009-08-13$2.50$2.50123,300
2009-08-12$1.95$1.95600
2009-08-11$2.10$2.1011,900
2009-08-10$2.01$2.017,400
2009-08-07$2.03$2.03900
2009-08-06$2.05$2.054,200
2009-08-05$2.01$2.018,200
2009-08-04$2.03$2.031,200
2009-08-03$1.98$1.987,900
2009-07-31$1.99$1.994,000
2009-07-30$2.04$2.042,500
2009-07-29$1.99$1.994,800
2009-07-28$1.97$1.971,700
2009-07-27$2.00$2.007,500
2009-07-24$1.98$1.983,000
2009-07-23$2.00$2.0023,900
2009-07-22$1.86$1.861,300
2009-07-21$1.93$1.9334,500
2009-07-20$1.90$1.9015,400
2009-07-17$1.85$1.858,300
2009-07-16$1.89$1.8922,800
2009-07-15$1.89$1.8921,300
2009-07-14$1.95$1.9549,400
2009-07-13$1.87$1.872,300
2009-07-10$1.78$1.784,700
2009-07-09$1.78$1.78500
2009-07-08$1.79$1.793,100
2009-07-07$1.80$1.808,600
2009-07-06$1.85$1.858,200
2009-07-02$1.83$1.8321,800
2009-07-01$1.88$1.883,800
2009-06-30$1.97$1.9738,900
2009-06-29$1.94$1.941,900
2009-06-26$2.00$2.003,400
2009-06-25$1.96$1.9614,900
2009-06-24$1.95$1.95110,200
2009-06-23$2.16$2.167,000
2009-06-22$2.10$2.109,300
2009-06-19$2.08$2.0827,300
2009-06-18$2.06$2.06600
2009-06-17$2.06$2.061,100
2009-06-16$2.09$2.092,400
2009-06-15$2.05$2.051,000
2009-06-12$2.10$2.107,700
2009-06-11$2.09$2.094,400
2009-06-10$2.01$2.013,700
2009-06-09$1.99$1.9918,000
2009-06-08$2.04$2.049,900
2009-06-05$2.04$2.043,200
2009-06-04$2.05$2.053,300
2009-06-03$2.04$2.043,100
2009-06-02$2.04$2.041,100
2009-06-01$2.02$2.023,800
2009-05-29$2.04$2.04100
2009-05-28$2.05$2.059,200
2009-05-27$2.00$2.00400
2009-05-26$1.96$1.968,600
2009-05-22$1.97$1.975,200
2009-05-21$2.00$2.0010,400
2009-05-20$1.99$1.9943,300
2009-05-19$1.98$1.9816,900
2009-05-18$2.05$2.055,600
2009-05-15$2.10$2.1010,800
2009-05-14$2.08$2.087,100
2009-05-13$2.02$2.023,600
2009-05-12$1.99$1.991,200
2009-05-11$1.95$1.952,300
2009-05-08$2.03$2.034,800
2009-05-07$2.10$2.104,900
2009-05-06$2.09$2.094,800
2009-05-05$2.08$2.0812,500
2009-05-04$2.08$2.0813,000
2009-05-01$2.08$2.08300
2009-04-30$2.08$2.084,300
2009-04-29$2.07$2.073,400
2009-04-28$2.05$2.051,500
2009-04-27$2.05$2.0510,000
2009-04-24$2.04$2.041,100
2009-04-23$2.02$2.0214,900
2009-04-22$2.08$2.088,300
2009-04-21$2.08$2.0821,700
2009-04-20$2.00$2.008,900
2009-04-17$1.98$1.984,800
2009-04-16$1.97$1.973,600
2009-04-15$1.94$1.945,900
2009-04-14$1.91$1.911,400
2009-04-13$1.89$1.891,500
2009-04-09$1.90$1.9017,400
2009-04-08$1.88$1.883,300
2009-04-07$1.91$1.911,400
2009-04-06$1.92$1.9211,500
2009-04-03$1.95$1.957,100
2009-04-02$2.06$2.0611,900
2009-04-01$2.10$2.1029,200
2009-03-31$2.01$2.014,700
2009-03-30$1.86$1.868,600
2009-03-27$2.09$2.0914,500
2009-03-26$2.12$2.123,700
2009-03-25$2.09$2.0911,500
2009-03-24$2.08$2.0811,900
2009-03-23$2.00$2.005,300
2009-03-20$2.00$2.005,400
2009-03-19$1.97$1.973,800
2009-03-18$2.10$2.1019,000
2009-03-17$2.05$2.0522,000
2009-03-16$1.98$1.981,200
2009-03-13$1.90$1.9028,000
2009-03-12$2.06$2.0611,900
2009-03-11$1.97$1.975,000
2009-03-10$1.90$1.904,700
2009-03-09$1.95$1.959,800
2009-03-06$1.95$1.9551,600
2009-03-05$1.93$1.938,200
2009-03-04$1.82$1.824,400
2009-03-03$1.79$1.795,600
2009-03-02$1.90$1.905,000
2009-02-27$1.95$1.951,300
2009-02-26$1.93$1.932,500
2009-02-25$1.90$1.908,700
2009-02-24$1.88$1.882,300
2009-02-23$1.93$1.931,000
2009-02-20$1.79$1.792,600
2009-02-19$1.89$1.8935,100
2009-02-18$1.91$1.916,100
2009-02-17$1.91$1.917,400
2009-02-13$1.82$1.8215,400
2009-02-12$1.85$1.8588,800
2009-02-11$1.50$1.5010,300
2009-02-10$1.50$1.50200
2009-02-09$1.50$1.503,100
2009-02-06$1.50$1.5020,400
2009-02-05$1.50$1.50600
2009-02-04$1.50$1.50600
2009-02-03$1.48$1.48500
2009-02-02$1.50$1.502,400
2009-01-30$1.43$1.431,000
2009-01-29$1.39$1.398,600
2009-01-28$1.45$1.45300
2009-01-27$1.45$1.4511,800
2009-01-26$1.68$1.686,000
2009-01-23$1.58$1.5827,400
2009-01-22$1.35$1.354,500
2009-01-21$1.29$1.295,400
2009-01-20$1.27$1.2728,500
2009-01-16$1.12$1.1222,200
2009-01-15$1.40$1.405,000
2009-01-14$1.44$1.445,000
2009-01-13$1.57$1.57400
2009-01-12$1.57$1.575,100
2009-01-09$1.62$1.6215,400
2009-01-08$1.62$1.6223,100
2009-01-07$1.55$1.5580,000
2009-01-06$1.45$1.45300
2009-01-05$1.44$1.44900
2009-01-02$1.43$1.432,500