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 — 2023

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2023-12-29$0.89$0.899,400
2023-12-28$0.88$0.8824,500
2023-12-27$0.91$0.9113,600
2023-12-26$0.94$0.947,500
2023-12-22$0.95$0.9520,000
2023-12-21$0.97$0.9782,500
2023-12-20$0.90$0.9076,300
2023-12-19$0.80$0.805,900
2023-12-18$0.83$0.832,400
2023-12-15$0.82$0.828,200
2023-12-14$0.88$0.881,900
2023-12-13$0.84$0.842,300
2023-12-12$0.87$0.871,200
2023-12-11$0.90$0.9011,600
2023-12-08$0.89$0.89400
2023-12-07$0.91$0.911,900
2023-12-06$0.90$0.9029,600
2023-12-05$0.85$0.8534,100
2023-12-04$0.90$0.909,100
2023-12-01$0.85$0.8510,800
2023-11-30$0.79$0.7916,500
2023-11-29$0.75$0.754,200
2023-11-28$0.75$0.758,100
2023-11-27$0.74$0.741,900
2023-11-24$0.75$0.752,000
2023-11-22$0.73$0.73800
2023-11-21$0.73$0.736,900
2023-11-20$0.73$0.7310,400
2023-11-17$0.72$0.721,100
2023-11-16$0.72$0.724,900
2023-11-15$0.72$0.721,100
2023-11-14$0.73$0.735,000
2023-11-13$0.73$0.7311,600
2023-11-10$0.75$0.752,200
2023-11-09$0.72$0.7244,900
2023-11-08$0.77$0.7712,900
2023-11-07$0.68$0.683,000
2023-11-06$0.68$0.682,000
2023-11-03$0.69$0.691,500
2023-11-02$0.70$0.701,900
2023-11-01$0.70$0.701,400
2023-10-31$0.70$0.702,400
2023-10-30$0.70$0.703,000
2023-10-27$0.77$0.770
2023-10-26$0.77$0.7724,600
2023-10-25$0.78$0.788,000
2023-10-24$0.78$0.786,500
2023-10-23$0.78$0.781,000
2023-10-20$0.79$0.79900
2023-10-19$0.74$0.740
2023-10-18$0.74$0.7416,600
2023-10-17$0.76$0.7628,300
2023-10-16$0.77$0.7714,400
2023-10-13$0.79$0.79500
2023-10-12$0.78$0.78200
2023-10-11$0.87$0.870
2023-10-10$0.87$0.87300
2023-10-09$0.88$0.886,800
2023-10-06$0.82$0.82600
2023-10-05$0.82$0.821,100
2023-10-04$0.87$0.872,300
2023-10-03$0.81$0.815,900
2023-10-02$0.77$0.774,800
2023-09-29$0.80$0.805,000
2023-09-28$0.77$0.77500
2023-09-27$0.77$0.771,400
2023-09-26$0.76$0.761,300
2023-09-25$0.79$0.791,400
2023-09-22$0.79$0.792,800
2023-09-21$0.77$0.77900
2023-09-20$0.79$0.7911,000
2023-09-19$0.77$0.7713,100
2023-09-18$0.79$0.7913,000
2023-09-15$0.80$0.8032,600
2023-09-14$0.83$0.834,900
2023-09-13$0.80$0.8017,200
2023-09-12$0.79$0.79400
2023-09-11$0.83$0.837,700
2023-09-08$0.81$0.8124,400
2023-09-07$0.76$0.7634,100
2023-09-06$0.69$0.696,700
2023-09-05$0.67$0.6720,300
2023-09-01$0.65$0.651,600
2023-08-31$0.66$0.667,700
2023-08-30$0.63$0.631,100
2023-08-29$0.65$0.6541,500
2023-08-28$0.66$0.6628,400
2023-08-25$0.72$0.7217,500
2023-08-24$0.79$0.7928,900
2023-08-23$0.83$0.831,200
2023-08-22$0.85$0.857,400
2023-08-21$0.88$0.887,700
2023-08-18$0.86$0.863,200
2023-08-17$0.88$0.888,000
2023-08-16$0.86$0.863,200
2023-08-15$0.84$0.842,100
2023-08-14$0.84$0.841,400
2023-08-11$0.86$0.861,400
2023-08-10$0.89$0.897,000
2023-08-09$0.89$0.8914,600
2023-08-08$0.91$0.9115,400
2023-08-07$0.93$0.934,900
2023-08-04$0.93$0.9348,000
2023-08-03$0.90$0.9018,300
2023-08-02$0.88$0.884,000
2023-08-01$0.84$0.84500
2023-07-31$0.84$0.843,800
2023-07-28$0.91$0.915,000
2023-07-27$0.84$0.848,500
2023-07-26$0.84$0.841,800
2023-07-25$0.84$0.84800
2023-07-24$0.88$0.881,600
2023-07-21$0.91$0.911,200
2023-07-20$0.91$0.91800
2023-07-19$0.88$0.881,600
2023-07-18$0.88$0.882,400
2023-07-17$0.88$0.881,400
2023-07-14$0.87$0.87800
2023-07-13$0.88$0.888,900
2023-07-12$0.90$0.906,200
2023-07-11$0.89$0.89300
2023-07-10$0.89$0.896,900
2023-07-07$0.84$0.844,200
2023-07-06$0.86$0.862,000
2023-07-05$0.83$0.834,000
2023-07-03$0.85$0.852,100
2023-06-30$0.86$0.8621,600
2023-06-29$0.90$0.9041,800
2023-06-28$0.81$0.81168,900
2023-06-27$1.09$1.0915,200
2023-06-26$1.08$1.0824,400
2023-06-23$1.11$1.1114,800
2023-06-22$1.07$1.075,900
2023-06-21$1.05$1.0513,200
2023-06-20$1.08$1.0824,900
2023-06-16$1.08$1.0816,500
2023-06-15$1.03$1.035,900
2023-06-14$1.03$1.035,900
2023-06-13$1.04$1.042,100
2023-06-12$1.02$1.0210,100
2023-06-09$1.05$1.0517,900
2023-06-08$1.01$1.0112,700
2023-06-07$1.04$1.045,400
2023-06-06$1.04$1.041,700
2023-06-05$1.05$1.0513,400
2023-06-02$1.05$1.0517,300
2023-06-01$1.00$1.006,100
2023-05-31$1.01$1.011,600
2023-05-30$0.99$0.991,500
2023-05-26$1.02$1.026,000
2023-05-25$0.99$0.993,600
2023-05-24$0.98$0.98900
2023-05-23$1.01$1.012,900
2023-05-22$1.00$1.004,600
2023-05-19$1.00$1.0014,800
2023-05-18$1.00$1.007,400
2023-05-17$0.99$0.994,400
2023-05-16$1.02$1.0211,700
2023-05-15$1.00$1.009,200
2023-05-12$1.05$1.0517,200
2023-05-11$0.95$0.9553,400
2023-05-10$0.98$0.9815,500
2023-05-09$0.97$0.9710,800
2023-05-08$0.98$0.985,500
2023-05-05$0.97$0.979,900
2023-05-04$0.98$0.986,600
2023-05-03$1.01$1.01104,700
2023-05-02$1.05$1.05133,100
2023-05-01$0.97$0.977,700
2023-04-28$0.97$0.9742,200
2023-04-27$0.96$0.969,300
2023-04-26$0.98$0.981,700
2023-04-25$0.97$0.971,200
2023-04-24$0.99$0.994,900
2023-04-21$1.00$1.004,500
2023-04-20$0.96$0.9617,200
2023-04-19$0.99$0.998,800
2023-04-18$1.00$1.006,700
2023-04-17$0.96$0.963,800
2023-04-14$1.00$1.0027,900
2023-04-13$0.98$0.984,400
2023-04-12$0.95$0.959,900
2023-04-11$0.97$0.978,800
2023-04-10$0.94$0.944,900
2023-04-06$0.94$0.944,600
2023-04-05$0.96$0.963,500
2023-04-04$0.96$0.964,400
2023-04-03$0.98$0.98169,400
2023-03-31$0.88$0.8820,600
2023-03-30$0.85$0.8518,600
2023-03-29$0.83$0.8316,400
2023-03-28$0.86$0.869,000
2023-03-27$0.88$0.8811,900
2023-03-24$0.90$0.902,400
2023-03-23$0.88$0.8831,900
2023-03-22$0.91$0.9128,600
2023-03-21$0.91$0.9135,700
2023-03-20$0.94$0.9420,200
2023-03-17$1.00$1.0010,100
2023-03-16$0.98$0.9842,300
2023-03-15$1.03$1.031,600
2023-03-14$1.06$1.068,600
2023-03-13$1.09$1.098,800
2023-03-10$1.09$1.099,200
2023-03-09$1.12$1.123,500
2023-03-08$1.12$1.121,600
2023-03-07$1.13$1.1328,700
2023-03-06$1.16$1.162,500
2023-03-03$1.19$1.199,200
2023-03-02$1.17$1.173,500
2023-03-01$1.17$1.172,300
2023-02-28$1.18$1.187,600
2023-02-27$1.18$1.1811,500
2023-02-24$1.23$1.231,800
2023-02-23$1.25$1.253,600
2023-02-22$1.21$1.215,100
2023-02-21$1.26$1.263,600
2023-02-17$1.32$1.324,900
2023-02-16$1.29$1.294,800
2023-02-15$1.28$1.2818,400
2023-02-14$1.20$1.205,700
2023-02-13$1.24$1.247,800
2023-02-10$1.18$1.1812,300
2023-02-09$1.17$1.1775,600
2023-02-08$1.30$1.3016,500
2023-02-07$1.36$1.368,400
2023-02-06$1.37$1.3713,500
2023-02-03$1.35$1.351,800
2023-02-02$1.38$1.388,000
2023-02-01$1.36$1.3620,500
2023-01-31$1.30$1.304,700
2023-01-30$1.31$1.3112,400
2023-01-27$1.38$1.3832,900
2023-01-26$1.40$1.4019,500
2023-01-25$1.44$1.44491,500
2023-01-24$1.28$1.2817,600
2023-01-23$1.18$1.1845,600
2023-01-20$1.14$1.142,600
2023-01-19$1.17$1.178,300
2023-01-18$1.20$1.2019,400
2023-01-17$1.38$1.3821,800
2023-01-13$1.25$1.2523,100
2023-01-12$1.25$1.2528,200
2023-01-11$1.33$1.3339,200
2023-01-10$1.19$1.19103,300
2023-01-09$1.10$1.107,000
2023-01-06$1.00$1.0064,600
2023-01-05$1.02$1.022,000
2023-01-04$1.04$1.0430,700
2023-01-03$1.04$1.0428,300