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 — 2003

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
2003-12-31$7.52$7.5262,600
2003-12-30$7.00$7.0059,350
2003-12-29$6.44$6.4428,150
2003-12-26$6.04$6.0411,000
2003-12-24$6.40$6.4029,350
2003-12-23$6.60$6.60195,875
2003-12-22$5.16$5.1611,450
2003-12-19$4.88$4.886,700
2003-12-18$5.00$5.0013,400
2003-12-17$5.04$5.049,850
2003-12-16$5.04$5.0411,450
2003-12-15$5.04$5.0411,675
2003-12-12$4.80$4.8010,850
2003-12-11$4.60$4.608,600
2003-12-10$4.56$4.5610,025
2003-12-09$4.80$4.8042,500
2003-12-08$5.24$5.249,625
2003-12-05$5.00$5.0027,600
2003-12-04$4.96$4.9620,575
2003-12-03$5.00$5.0037,450
2003-12-02$5.64$5.6438,600
2003-12-01$5.48$5.4895,400
2003-11-28$4.92$4.9248,525
2003-11-26$4.00$4.008,550
2003-11-25$4.00$4.0015,400
2003-11-24$4.04$4.0419,425
2003-11-21$4.16$4.1613,125
2003-11-20$4.12$4.1224,050
2003-11-19$4.24$4.2434,275
2003-11-18$4.36$4.3676,200
2003-11-17$4.20$4.2044,475
2003-11-14$4.24$4.2426,500
2003-11-13$4.60$4.6059,000
2003-11-12$4.48$4.4843,975
2003-11-11$4.84$4.8459,550
2003-11-10$4.96$4.9682,450
2003-11-07$4.68$4.68168,200
2003-11-06$4.00$4.00110,675
2003-11-05$3.24$3.2474,025
2003-11-04$2.76$2.7669,325
2003-11-03$3.00$3.00143,150
2003-10-31$2.28$2.28120,200
2003-10-30$1.92$1.925,050
2003-10-29$1.84$1.845,100
2003-10-28$1.80$1.808,425
2003-10-27$1.88$1.8810,475
2003-10-24$1.84$1.844,450
2003-10-23$1.84$1.847,275
2003-10-22$1.88$1.883,475
2003-10-21$1.92$1.926,350
2003-10-20$1.96$1.969,775
2003-10-17$1.88$1.8877,175
2003-10-16$2.08$2.0812,475
2003-10-15$2.00$2.0098,575
2003-10-14$2.04$2.0415,325
2003-10-13$2.20$2.2040,700
2003-10-10$2.32$2.32112,175
2003-10-09$2.00$2.004,050
2003-10-08$2.08$2.0810,175
2003-10-07$2.12$2.1211,050
2003-10-06$2.08$2.085,400
2003-10-03$2.28$2.288,400
2003-10-02$2.28$2.284,750
2003-10-01$2.36$2.3617,400
2003-09-30$2.16$2.164,375
2003-09-29$2.16$2.162,550
2003-09-26$2.08$2.082,325
2003-09-25$2.12$2.125,050
2003-09-24$2.08$2.089,600
2003-09-23$2.40$2.406,025
2003-09-22$2.32$2.326,700
2003-09-19$2.16$2.168,925
2003-09-18$2.24$2.2410,250
2003-09-17$2.48$2.4818,500
2003-09-16$2.52$2.5228,000
2003-09-15$2.84$2.8457,450
2003-09-12$2.36$2.3612,350
2003-09-11$2.36$2.367,900
2003-09-10$2.28$2.2816,650
2003-09-09$2.24$2.2428,675
2003-09-08$2.20$2.201,950
2003-09-05$2.24$2.243,925
2003-09-04$2.28$2.288,825
2003-09-03$2.20$2.206,675
2003-09-02$2.12$2.122,950
2003-08-29$2.20$2.2017,525
2003-08-28$2.16$2.1663,275
2003-08-27$1.96$1.96450
2003-08-26$1.96$1.961,450
2003-08-25$2.00$2.0017,250
2003-08-22$2.00$2.002,450
2003-08-21$1.80$1.801,000
2003-08-20$1.88$1.88675
2003-08-19$1.76$1.766,325
2003-08-18$1.80$1.801,375
2003-08-15$1.84$1.841,750
2003-08-14$1.80$1.8010,625
2003-08-13$2.00$2.003,425
2003-08-12$2.00$2.004,800
2003-08-11$2.08$2.082,950
2003-08-08$2.00$2.004,400
2003-08-07$1.72$1.726,900
2003-08-06$1.96$1.962,900
2003-08-05$1.88$1.881,750
2003-08-04$2.00$2.001,750
2003-08-01$1.84$1.841,125
2003-07-31$2.04$2.0410,675
2003-07-30$1.80$1.802,925
2003-07-29$1.88$1.8817,600
2003-07-28$1.88$1.885,800
2003-07-25$1.92$1.922,925
2003-07-24$1.96$1.962,625
2003-07-23$1.92$1.927,550
2003-07-22$1.96$1.964,400
2003-07-21$2.12$2.122,975
2003-07-18$2.00$2.004,225
2003-07-17$2.16$2.169,675
2003-07-16$2.44$2.4412,950
2003-07-15$2.12$2.125,000
2003-07-14$2.04$2.041,900
2003-07-11$2.00$2.004,600
2003-07-10$2.00$2.003,475
2003-07-09$2.12$2.121,375
2003-07-08$2.12$2.123,425
2003-07-07$2.40$2.403,675
2003-07-03$2.36$2.361,775
2003-07-02$2.36$2.365,225
2003-07-01$2.36$2.3610,775
2003-06-30$2.08$2.088,475
2003-06-27$2.00$2.008,800
2003-06-26$2.00$2.002,875
2003-06-25$2.08$2.084,825
2003-06-24$2.20$2.203,900
2003-06-23$2.00$2.003,900
2003-06-20$2.12$2.127,950
2003-06-19$2.20$2.2010,800
2003-06-18$2.32$2.328,325
2003-06-17$2.12$2.1217,525
2003-06-16$2.56$2.568,100
2003-06-13$2.52$2.525,125
2003-06-12$2.72$2.7224,200
2003-06-11$2.36$2.3643,375
2003-06-10$1.84$1.846,300
2003-06-09$1.68$1.682,750
2003-06-06$1.68$1.686,800
2003-06-05$1.80$1.806,375
2003-06-04$1.80$1.805,850
2003-06-03$1.72$1.722,500
2003-06-02$1.76$1.762,825
2003-05-30$1.80$1.809,775
2003-05-29$1.76$1.7611,500
2003-05-28$1.96$1.9610,250
2003-05-27$1.76$1.762,450
2003-05-23$1.72$1.723,850
2003-05-22$1.96$1.962,050
2003-05-21$1.76$1.765,650
2003-05-20$1.72$1.72175
2003-05-19$1.72$1.7250
2003-05-16$1.72$1.721,875
2003-05-15$1.76$1.761,250
2003-05-14$1.76$1.761,875
2003-05-13$1.72$1.724,600
2003-05-12$2.00$2.004,350
2003-05-09$1.92$1.926,300
2003-05-08$1.84$1.841,800
2003-05-07$2.08$2.082,225
2003-05-06$2.08$2.08300
2003-05-05$1.88$1.880
2003-05-02$1.88$1.88925
2003-05-01$2.08$2.08625
2003-04-30$2.08$2.082,625
2003-04-29$2.08$2.08100
2003-04-28$2.08$2.08675
2003-04-25$2.08$2.081,000
2003-04-24$2.20$2.203,325
2003-04-23$2.08$2.083,275
2003-04-22$2.12$2.12775
2003-04-21$2.16$2.161,725
2003-04-17$2.00$2.001,025
2003-04-16$1.92$1.92200
2003-04-15$2.12$2.121,050
2003-04-14$2.20$2.201,650
2003-04-11$2.04$2.0425
2003-04-10$2.08$2.081,625
2003-04-09$2.08$2.083,675
2003-04-08$2.20$2.201,175
2003-04-07$2.16$2.167,400
2003-04-04$1.92$1.92625
2003-04-03$2.00$2.003,275
2003-04-02$2.04$2.04400
2003-04-01$1.96$1.96525
2003-03-31$1.92$1.921,275
2003-03-28$1.88$1.88125
2003-03-27$1.84$1.842,025
2003-03-26$1.88$1.881,625
2003-03-25$1.92$1.921,300
2003-03-24$1.92$1.921,900
2003-03-21$1.92$1.9275
2003-03-20$1.92$1.92350
2003-03-19$1.76$1.76475
2003-03-18$1.76$1.76400
2003-03-17$1.96$1.96825
2003-03-14$1.88$1.880
2003-03-13$1.88$1.88575
2003-03-12$1.68$1.68225
2003-03-11$1.68$1.681,100
2003-03-10$1.96$1.964,975
2003-03-07$1.72$1.72100
2003-03-06$1.96$1.96500
2003-03-05$1.96$1.961,625
2003-03-04$1.80$1.80275
2003-03-03$1.84$1.841,425
2003-02-28$2.04$2.041,175
2003-02-27$1.96$1.96650
2003-02-26$2.12$2.12750
2003-02-25$1.92$1.922,375
2003-02-24$2.00$2.00150
2003-02-21$1.92$1.92200
2003-02-20$2.16$2.16950
2003-02-19$2.16$2.161,400
2003-02-18$2.00$2.002,850
2003-02-14$2.00$2.00375
2003-02-13$2.12$2.12475
2003-02-12$1.96$1.961,525
2003-02-11$1.92$1.927,300
2003-02-10$1.96$1.96850
2003-02-07$2.20$2.201,500
2003-02-06$1.68$1.6875
2003-02-05$1.64$1.6425
2003-02-04$1.68$1.684,450
2003-02-03$1.60$1.601,225
2003-01-31$1.72$1.720
2003-01-30$1.72$1.723,900
2003-01-29$1.84$1.84250
2003-01-28$1.92$1.923,825
2003-01-27$1.88$1.882,450
2003-01-24$2.16$2.166,650
2003-01-23$2.28$2.2817,025
2003-01-22$1.76$1.761,375
2003-01-21$1.84$1.84100
2003-01-17$2.00$2.001,975
2003-01-16$2.08$2.083,875
2003-01-15$2.08$2.081,950
2003-01-14$1.72$1.72300
2003-01-13$1.76$1.76500
2003-01-10$1.92$1.921,150
2003-01-09$1.76$1.765,725
2003-01-08$1.64$1.641,400
2003-01-07$1.60$1.601,225
2003-01-06$1.60$1.60300
2003-01-03$1.64$1.6450
2003-01-02$1.76$1.761,050