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 — 2004

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2004-12-31$5.76$5.769,675
2004-12-30$5.68$5.6810,625
2004-12-29$5.48$5.4815,650
2004-12-28$5.44$5.4418,400
2004-12-27$5.64$5.648,800
2004-12-23$5.60$5.6022,075
2004-12-22$5.80$5.806,650
2004-12-21$5.60$5.609,725
2004-12-20$5.72$5.728,075
2004-12-17$6.00$6.0013,525
2004-12-16$5.76$5.7617,875
2004-12-15$6.12$6.1224,625
2004-12-14$6.32$6.3235,150
2004-12-13$6.76$6.7664,925
2004-12-10$6.16$6.1623,925
2004-12-09$6.00$6.0024,025
2004-12-08$5.92$5.9215,300
2004-12-07$5.44$5.4413,950
2004-12-06$5.48$5.4814,275
2004-12-03$5.44$5.447,925
2004-12-02$5.60$5.6010,500
2004-12-01$5.40$5.4039,300
2004-11-30$5.56$5.5626,050
2004-11-29$5.48$5.4822,625
2004-11-26$5.16$5.1618,850
2004-11-24$5.12$5.1217,200
2004-11-23$4.84$4.8410,375
2004-11-22$4.76$4.762,550
2004-11-19$4.80$4.8011,250
2004-11-18$4.76$4.761,225
2004-11-17$4.76$4.767,100
2004-11-16$4.80$4.805,325
2004-11-15$4.92$4.923,950
2004-11-12$4.84$4.8414,025
2004-11-11$4.80$4.808,450
2004-11-10$4.76$4.761,050
2004-11-09$4.72$4.727,350
2004-11-08$4.76$4.767,775
2004-11-05$4.80$4.8015,000
2004-11-04$4.84$4.8421,275
2004-11-03$4.92$4.926,075
2004-11-02$4.84$4.8420,625
2004-11-01$5.04$5.045,775
2004-10-29$5.12$5.123,075
2004-10-28$5.16$5.165,100
2004-10-27$5.04$5.043,375
2004-10-26$5.08$5.089,200
2004-10-25$4.88$4.885,575
2004-10-22$4.88$4.88325
2004-10-21$4.96$4.963,350
2004-10-20$5.00$5.002,400
2004-10-19$5.20$5.2020,075
2004-10-18$4.80$4.802,600
2004-10-15$4.64$4.647,300
2004-10-14$4.92$4.921,525
2004-10-13$4.80$4.803,200
2004-10-12$4.88$4.881,300
2004-10-11$4.56$4.565,225
2004-10-08$4.80$4.803,575
2004-10-07$4.68$4.685,275
2004-10-06$4.92$4.923,400
2004-10-05$4.88$4.886,175
2004-10-04$4.96$4.966,775
2004-10-01$5.00$5.005,775
2004-09-30$5.00$5.001,450
2004-09-29$4.80$4.808,550
2004-09-28$4.92$4.923,925
2004-09-27$4.96$4.961,550
2004-09-24$5.12$5.122,300
2004-09-23$5.20$5.203,350
2004-09-22$5.24$5.244,700
2004-09-21$5.16$5.168,150
2004-09-20$5.24$5.246,450
2004-09-17$5.24$5.247,875
2004-09-16$4.96$4.964,100
2004-09-15$4.96$4.964,950
2004-09-14$5.04$5.0415,275
2004-09-13$5.24$5.249,725
2004-09-10$4.92$4.927,125
2004-09-09$4.76$4.766,050
2004-09-08$4.92$4.922,400
2004-09-07$4.92$4.928,975
2004-09-03$4.92$4.923,875
2004-09-02$4.96$4.964,600
2004-09-01$4.88$4.883,525
2004-08-31$4.72$4.723,250
2004-08-30$4.88$4.886,675
2004-08-27$4.80$4.804,825
2004-08-26$4.60$4.6011,200
2004-08-25$4.96$4.963,575
2004-08-24$4.80$4.805,150
2004-08-23$4.84$4.8417,000
2004-08-20$4.96$4.966,450
2004-08-19$4.80$4.802,750
2004-08-18$4.68$4.6812,825
2004-08-17$4.40$4.4025,875
2004-08-16$5.32$5.328,975
2004-08-13$5.40$5.4010,300
2004-08-12$5.52$5.525,675
2004-08-11$5.40$5.407,700
2004-08-10$5.24$5.245,950
2004-08-09$5.36$5.3616,025
2004-08-06$5.28$5.2810,925
2004-08-05$5.40$5.4011,525
2004-08-04$5.76$5.7621,900
2004-08-03$5.76$5.7651,250
2004-08-02$7.00$7.0011,525
2004-07-30$6.96$6.968,350
2004-07-29$6.76$6.7621,575
2004-07-28$6.36$6.366,425
2004-07-27$6.32$6.327,475
2004-07-26$6.28$6.2815,050
2004-07-23$6.20$6.2011,750
2004-07-22$6.76$6.7618,900
2004-07-21$6.72$6.7218,850
2004-07-20$6.76$6.7611,000
2004-07-19$6.72$6.7212,875
2004-07-16$6.68$6.685,050
2004-07-15$6.76$6.769,700
2004-07-14$6.80$6.809,850
2004-07-13$6.72$6.727,150
2004-07-12$6.76$6.7612,325
2004-07-09$6.92$6.9219,300
2004-07-08$6.72$6.7242,925
2004-07-07$6.64$6.6441,650
2004-07-06$6.56$6.5664,275
2004-07-02$6.64$6.64164,225
2004-07-01$5.32$5.325,825
2004-06-30$5.56$5.5618,625
2004-06-29$5.40$5.4018,150
2004-06-28$5.20$5.204,975
2004-06-25$4.96$4.9610,650
2004-06-24$4.92$4.926,375
2004-06-23$5.00$5.006,475
2004-06-22$4.92$4.924,575
2004-06-21$5.04$5.0413,050
2004-06-18$5.12$5.124,850
2004-06-17$5.16$5.167,550
2004-06-16$5.08$5.086,025
2004-06-15$5.20$5.201,825
2004-06-14$5.36$5.366,575
2004-06-10$5.44$5.445,225
2004-06-09$5.24$5.245,225
2004-06-08$5.32$5.328,300
2004-06-07$5.20$5.209,000
2004-06-04$5.16$5.1615,025
2004-06-03$4.76$4.764,175
2004-06-02$4.88$4.8812,275
2004-06-01$5.08$5.088,475
2004-05-28$5.16$5.163,800
2004-05-27$5.20$5.202,875
2004-05-26$5.24$5.2412,100
2004-05-25$5.36$5.3610,525
2004-05-24$5.28$5.287,400
2004-05-21$5.32$5.329,325
2004-05-20$5.40$5.4013,525
2004-05-19$5.52$5.528,425
2004-05-18$5.08$5.088,800
2004-05-17$5.16$5.1611,800
2004-05-14$5.64$5.6421,175
2004-05-13$5.88$5.8812,475
2004-05-12$6.20$6.2059,150
2004-05-11$5.48$5.4822,600
2004-05-10$5.44$5.4414,950
2004-05-07$5.40$5.402,850
2004-05-06$5.00$5.003,075
2004-05-05$5.00$5.0020,700
2004-05-04$5.20$5.2015,175
2004-05-03$4.80$4.8015,225
2004-04-30$5.20$5.2017,900
2004-04-29$4.84$4.8415,050
2004-04-28$5.20$5.2015,300
2004-04-27$5.56$5.5615,225
2004-04-26$5.60$5.6013,550
2004-04-23$5.44$5.448,600
2004-04-22$5.28$5.285,575
2004-04-21$5.48$5.482,475
2004-04-20$5.56$5.564,125
2004-04-19$5.52$5.523,200
2004-04-16$5.52$5.528,400
2004-04-15$5.80$5.8021,400
2004-04-14$5.84$5.8413,250
2004-04-13$6.20$6.2069,875
2004-04-12$5.36$5.368,200
2004-04-08$5.28$5.2816,725
2004-04-07$5.20$5.207,525
2004-04-06$5.44$5.446,450
2004-04-05$5.36$5.362,600
2004-04-02$5.44$5.4422,475
2004-04-01$5.32$5.3226,725
2004-03-31$5.04$5.042,350
2004-03-30$4.96$4.9611,700
2004-03-29$5.12$5.1215,175
2004-03-26$4.68$4.684,650
2004-03-25$4.40$4.4012,725
2004-03-24$4.44$4.4410,225
2004-03-23$4.44$4.447,600
2004-03-22$4.60$4.6018,025
2004-03-19$4.92$4.927,725
2004-03-18$4.60$4.6045,500
2004-03-17$4.96$4.9613,700
2004-03-16$4.92$4.9216,650
2004-03-15$4.88$4.8810,550
2004-03-12$5.08$5.0820,800
2004-03-11$4.96$4.9613,450
2004-03-10$5.20$5.2015,025
2004-03-09$5.40$5.407,900
2004-03-08$5.48$5.4818,500
2004-03-05$5.28$5.2811,575
2004-03-04$5.44$5.448,825
2004-03-03$5.32$5.328,350
2004-03-02$5.48$5.4824,350
2004-03-01$5.44$5.4444,275
2004-02-27$5.36$5.3618,075
2004-02-26$5.24$5.2420,575
2004-02-25$5.12$5.1223,700
2004-02-24$5.20$5.2052,450
2004-02-23$5.28$5.2880,825
2004-02-20$6.12$6.1220,725
2004-02-19$6.16$6.1628,475
2004-02-18$6.76$6.7633,725
2004-02-17$6.56$6.5635,325
2004-02-13$6.88$6.8814,750
2004-02-12$7.28$7.2819,375
2004-02-11$7.24$7.2416,975
2004-02-10$7.40$7.4027,075
2004-02-09$7.40$7.4042,625
2004-02-06$6.96$6.9663,575
2004-02-05$6.36$6.36105,400
2004-02-04$7.44$7.4439,200
2004-02-03$7.48$7.48109,775
2004-02-02$8.60$8.6071,675
2004-01-30$8.36$8.3646,275
2004-01-29$7.84$7.8444,725
2004-01-28$7.92$7.9255,900
2004-01-27$7.72$7.7224,600
2004-01-26$7.76$7.7620,650
2004-01-23$7.64$7.6455,200
2004-01-22$8.08$8.0830,800
2004-01-21$8.12$8.1274,125
2004-01-20$7.44$7.4462,350
2004-01-16$7.80$7.8029,175
2004-01-15$7.64$7.6439,625
2004-01-14$7.84$7.8467,100
2004-01-13$7.96$7.9661,375
2004-01-12$8.00$8.00247,400
2004-01-09$8.20$8.20134,175
2004-01-08$6.96$6.9629,300
2004-01-07$6.68$6.6827,250
2004-01-06$6.68$6.6816,925
2004-01-05$6.72$6.7219,850
2004-01-02$6.80$6.8065,825