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 — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2005-12-30$2.60$2.6039,625
2005-12-29$2.48$2.4829,775
2005-12-28$2.56$2.5625,175
2005-12-27$2.48$2.4852,950
2005-12-23$2.44$2.4456,500
2005-12-22$2.32$2.3215,875
2005-12-21$2.24$2.244,900
2005-12-20$2.24$2.2430,200
2005-12-19$2.24$2.246,575
2005-12-16$2.32$2.3214,850
2005-12-15$2.40$2.4014,125
2005-12-14$2.40$2.4012,750
2005-12-13$2.48$2.4826,250
2005-12-12$2.48$2.4812,625
2005-12-09$2.52$2.528,125
2005-12-08$2.64$2.648,050
2005-12-07$2.60$2.6017,350
2005-12-06$2.76$2.767,850
2005-12-05$2.64$2.6410,250
2005-12-02$2.60$2.6015,075
2005-12-01$2.60$2.6019,150
2005-11-30$2.68$2.6840,475
2005-11-29$2.48$2.4811,175
2005-11-28$2.52$2.5214,525
2005-11-25$2.56$2.565,700
2005-11-23$2.56$2.563,850
2005-11-22$2.60$2.6015,150
2005-11-21$2.56$2.565,050
2005-11-18$2.68$2.6810,350
2005-11-17$2.68$2.6812,825
2005-11-16$2.60$2.6032,350
2005-11-15$2.84$2.8412,575
2005-11-14$2.96$2.9616,400
2005-11-11$3.04$3.045,125
2005-11-10$3.04$3.042,550
2005-11-09$3.20$3.2013,200
2005-11-08$3.16$3.166,450
2005-11-07$3.24$3.248,400
2005-11-04$3.16$3.1645,300
2005-11-03$3.68$3.684,100
2005-11-02$3.68$3.683,050
2005-11-01$3.56$3.56825
2005-10-31$3.60$3.603,875
2005-10-28$3.56$3.564,000
2005-10-27$3.60$3.601,175
2005-10-26$3.52$3.522,950
2005-10-25$3.56$3.567,600
2005-10-24$3.64$3.642,875
2005-10-21$3.60$3.606,775
2005-10-20$3.60$3.607,275
2005-10-19$3.80$3.8013,175
2005-10-18$4.08$4.084,225
2005-10-17$4.12$4.1223,800
2005-10-14$3.84$3.845,225
2005-10-13$3.68$3.688,075
2005-10-12$3.68$3.6817,350
2005-10-11$3.40$3.408,125
2005-10-10$3.56$3.566,625
2005-10-07$3.72$3.724,825
2005-10-06$3.72$3.722,625
2005-10-05$3.76$3.764,125
2005-10-04$3.64$3.642,900
2005-10-03$3.72$3.729,100
2005-09-30$3.84$3.844,975
2005-09-29$3.72$3.721,225
2005-09-28$3.72$3.724,025
2005-09-27$3.88$3.888,150
2005-09-26$3.80$3.805,400
2005-09-23$3.76$3.764,575
2005-09-22$3.60$3.607,625
2005-09-21$3.56$3.564,000
2005-09-20$3.56$3.5610,025
2005-09-19$3.48$3.4824,325
2005-09-16$3.76$3.767,600
2005-09-15$3.72$3.728,075
2005-09-14$3.88$3.884,575
2005-09-13$3.84$3.843,925
2005-09-12$3.80$3.807,850
2005-09-09$4.00$4.002,450
2005-09-08$4.04$4.042,800
2005-09-07$3.88$3.884,550
2005-09-06$4.08$4.082,900
2005-09-02$4.08$4.084,075
2005-09-01$4.16$4.169,325
2005-08-31$4.04$4.046,875
2005-08-30$4.12$4.121,775
2005-08-29$4.16$4.169,725
2005-08-26$4.24$4.244,375
2005-08-25$4.44$4.441,150
2005-08-24$4.16$4.168,125
2005-08-23$4.28$4.286,800
2005-08-22$4.40$4.4010,250
2005-08-19$4.28$4.288,625
2005-08-18$4.20$4.208,850
2005-08-17$4.16$4.162,850
2005-08-16$4.08$4.084,750
2005-08-15$4.12$4.129,050
2005-08-12$4.28$4.2812,650
2005-08-11$4.08$4.083,625
2005-08-10$4.08$4.089,350
2005-08-09$3.92$3.9210,775
2005-08-08$4.12$4.122,700
2005-08-05$4.16$4.164,775
2005-08-04$4.00$4.002,875
2005-08-03$4.00$4.007,750
2005-08-02$3.92$3.926,100
2005-08-01$4.08$4.082,775
2005-07-29$4.00$4.0010,175
2005-07-28$4.08$4.082,000
2005-07-27$4.12$4.124,350
2005-07-26$4.04$4.048,850
2005-07-25$4.08$4.0829,925
2005-07-22$4.04$4.0410,825
2005-07-21$4.20$4.204,775
2005-07-20$4.24$4.242,575
2005-07-19$4.40$4.406,450
2005-07-18$4.40$4.408,225
2005-07-15$4.56$4.564,500
2005-07-14$4.56$4.567,100
2005-07-13$4.72$4.724,600
2005-07-12$4.60$4.604,800
2005-07-11$4.64$4.642,450
2005-07-08$4.68$4.686,350
2005-07-07$4.56$4.563,800
2005-07-06$4.64$4.647,050
2005-07-05$4.40$4.403,850
2005-07-01$4.60$4.608,350
2005-06-30$4.72$4.7216,750
2005-06-29$4.40$4.4018,800
2005-06-28$4.00$4.001,700
2005-06-27$3.96$3.961,525
2005-06-24$3.88$3.882,275
2005-06-23$3.80$3.802,175
2005-06-22$4.00$4.002,550
2005-06-21$3.92$3.923,550
2005-06-20$4.08$4.088,350
2005-06-17$4.12$4.123,850
2005-06-16$4.08$4.081,200
2005-06-15$4.08$4.081,950
2005-06-14$4.00$4.007,150
2005-06-13$3.96$3.964,400
2005-06-10$3.84$3.843,000
2005-06-09$4.04$4.042,850
2005-06-08$4.08$4.0813,375
2005-06-07$3.60$3.603,500
2005-06-06$3.64$3.644,450
2005-06-03$3.60$3.601,400
2005-06-02$3.44$3.444,950
2005-06-01$3.56$3.566,900
2005-05-31$3.44$3.448,825
2005-05-27$3.64$3.641,450
2005-05-26$3.72$3.723,075
2005-05-25$3.48$3.483,825
2005-05-24$3.80$3.803,050
2005-05-23$3.64$3.646,475
2005-05-20$3.52$3.5219,950
2005-05-19$3.84$3.841,100
2005-05-18$3.76$3.7613,050
2005-05-17$3.80$3.8014,900
2005-05-16$4.20$4.207,825
2005-05-13$4.08$4.082,150
2005-05-12$4.20$4.208,425
2005-05-11$3.88$3.8810,975
2005-05-10$3.84$3.846,600
2005-05-09$3.80$3.806,575
2005-05-06$3.84$3.8412,675
2005-05-05$3.76$3.768,025
2005-05-04$3.68$3.687,625
2005-05-03$3.68$3.6823,400
2005-05-02$4.04$4.046,425
2005-04-29$4.16$4.165,775
2005-04-28$4.20$4.2011,150
2005-04-27$4.28$4.288,825
2005-04-26$4.40$4.4016,475
2005-04-25$4.40$4.402,450
2005-04-22$4.36$4.364,875
2005-04-21$4.32$4.325,425
2005-04-20$4.56$4.563,225
2005-04-19$4.48$4.481,700
2005-04-18$4.48$4.483,900
2005-04-15$4.44$4.446,850
2005-04-14$4.40$4.4013,600
2005-04-13$4.32$4.329,400
2005-04-12$4.64$4.642,525
2005-04-11$4.56$4.568,975
2005-04-08$4.60$4.609,475
2005-04-07$4.68$4.688,050
2005-04-06$4.68$4.685,325
2005-04-05$4.76$4.767,875
2005-04-04$4.92$4.9211,050
2005-04-01$4.92$4.922,375
2005-03-31$4.88$4.883,300
2005-03-30$4.96$4.9611,700
2005-03-29$4.96$4.962,950
2005-03-28$5.04$5.049,300
2005-03-24$5.12$5.127,425
2005-03-23$4.92$4.923,025
2005-03-22$5.00$5.008,500
2005-03-21$4.84$4.844,300
2005-03-18$5.12$5.123,625
2005-03-17$4.84$4.846,050
2005-03-16$4.84$4.845,600
2005-03-15$5.00$5.008,575
2005-03-14$4.92$4.929,125
2005-03-11$4.92$4.927,925
2005-03-10$4.88$4.8814,375
2005-03-09$5.20$5.2014,625
2005-03-08$5.28$5.285,550
2005-03-07$5.20$5.2011,275
2005-03-04$5.40$5.4017,625
2005-03-03$5.12$5.123,975
2005-03-02$5.04$5.042,850
2005-03-01$5.08$5.085,225
2005-02-28$5.08$5.087,225
2005-02-25$5.16$5.1613,250
2005-02-24$5.08$5.0819,075
2005-02-23$4.88$4.884,850
2005-02-22$4.88$4.886,425
2005-02-18$4.96$4.964,800
2005-02-17$5.04$5.046,850
2005-02-16$5.08$5.083,575
2005-02-15$4.96$4.967,775
2005-02-14$5.20$5.2010,625
2005-02-11$5.08$5.088,325
2005-02-10$5.20$5.201,150
2005-02-09$5.20$5.205,050
2005-02-08$5.20$5.2011,125
2005-02-07$5.00$5.0017,400
2005-02-04$5.20$5.2015,750
2005-02-03$5.36$5.3615,400
2005-02-02$5.36$5.369,600
2005-02-01$5.28$5.2812,700
2005-01-31$5.24$5.2427,325
2005-01-28$5.28$5.286,925
2005-01-27$5.24$5.2411,700
2005-01-26$5.44$5.443,900
2005-01-25$5.40$5.407,925
2005-01-24$5.40$5.405,125
2005-01-21$5.52$5.525,625
2005-01-20$5.56$5.564,725
2005-01-19$5.60$5.6013,125
2005-01-18$5.44$5.4413,725
2005-01-14$5.60$5.6010,375
2005-01-13$5.60$5.606,650
2005-01-12$5.52$5.527,900
2005-01-11$5.60$5.607,800
2005-01-10$5.68$5.686,975
2005-01-07$5.72$5.726,050
2005-01-06$5.72$5.7215,175
2005-01-05$5.80$5.807,525
2005-01-04$5.80$5.809,750
2005-01-03$5.72$5.729,800