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 — 1997

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volume
1997-12-31$11.13$11.1321,450
1997-12-30$10.88$10.8819,750
1997-12-29$11.00$11.0023,275
1997-12-26$10.50$10.501,175
1997-12-24$10.25$10.256,100
1997-12-23$10.13$10.1319,075
1997-12-22$10.75$10.7517,750
1997-12-19$10.88$10.8818,775
1997-12-18$11.00$11.0014,625
1997-12-17$10.75$10.7515,675
1997-12-16$11.00$11.0010,475
1997-12-15$11.50$11.5034,475
1997-12-12$12.25$12.2523,075
1997-12-11$12.50$12.5011,625
1997-12-10$12.25$12.2531,400
1997-12-09$13.00$13.0019,925
1997-12-08$13.50$13.506,775
1997-12-05$13.00$13.0012,575
1997-12-04$13.50$13.5019,075
1997-12-03$14.00$14.0038,400
1997-12-02$15.13$15.1314,700
1997-12-01$15.75$15.7510,300
1997-11-28$16.00$16.001,550
1997-11-26$16.00$16.009,625
1997-11-25$16.25$16.2525,775
1997-11-24$16.50$16.5012,550
1997-11-21$16.50$16.508,175
1997-11-20$16.75$16.755,100
1997-11-19$17.88$17.887,825
1997-11-18$17.50$17.506,650
1997-11-17$17.25$17.2516,650
1997-11-14$17.50$17.5024,450
1997-11-13$17.00$17.003,550
1997-11-12$16.50$16.505,200
1997-11-11$17.00$17.0018,075
1997-11-10$16.25$16.258,050
1997-11-07$16.00$16.006,175
1997-11-06$16.13$16.1317,700
1997-11-05$16.25$16.258,400
1997-11-04$16.75$16.7518,200
1997-11-03$17.00$17.0011,725
1997-10-31$17.13$17.1329,050
1997-10-30$16.00$16.0013,525
1997-10-29$17.50$17.5023,450
1997-10-28$17.75$17.7510,775
1997-10-27$17.00$17.004,025
1997-10-24$17.50$17.506,025
1997-10-23$17.50$17.509,550
1997-10-22$17.75$17.755,825
1997-10-21$18.00$18.007,675
1997-10-20$18.25$18.2516,725
1997-10-17$18.25$18.2522,650
1997-10-16$17.75$17.7514,425
1997-10-15$18.25$18.259,425
1997-10-14$18.50$18.5017,175
1997-10-13$18.00$18.0013,125
1997-10-10$18.13$18.1320,675
1997-10-09$18.50$18.5015,700
1997-10-08$20.00$20.0015,425
1997-10-07$18.00$18.0035,725
1997-10-06$16.75$16.7563,150
1997-10-03$20.00$20.0023,925
1997-10-02$20.00$20.0026,550
1997-10-01$20.25$20.2527,950
1997-09-30$23.00$23.0010,925
1997-09-29$22.75$22.754,425
1997-09-26$23.00$23.003,000
1997-09-25$23.50$23.504,650
1997-09-24$23.25$23.253,325
1997-09-23$23.38$23.385,800
1997-09-22$23.50$23.503,350
1997-09-19$23.63$23.6313,625
1997-09-18$24.00$24.004,700
1997-09-17$23.75$23.7513,300
1997-09-16$23.50$23.5012,400
1997-09-15$23.25$23.254,350
1997-09-12$23.50$23.5016,350
1997-09-11$24.25$24.255,100
1997-09-10$24.25$24.257,775
1997-09-09$24.50$24.508,450
1997-09-08$24.00$24.0021,700
1997-09-05$23.25$23.2512,500
1997-09-04$22.25$22.2530,675
1997-09-03$21.00$21.0010,875
1997-09-02$20.25$20.259,600
1997-08-29$20.13$20.133,975
1997-08-28$20.25$20.256,550
1997-08-27$20.25$20.252,575
1997-08-26$20.00$20.006,125
1997-08-25$20.00$20.008,775
1997-08-22$20.00$20.0037,325
1997-08-21$21.13$21.134,875
1997-08-20$20.50$20.5019,275
1997-08-19$20.00$20.0011,450
1997-08-18$20.25$20.2517,050
1997-08-15$20.75$20.756,275
1997-08-14$20.75$20.754,675
1997-08-13$21.75$21.7510,900
1997-08-12$22.00$22.0010,175
1997-08-11$20.50$20.5020,625
1997-08-08$20.25$20.2511,050
1997-08-07$20.75$20.758,850
1997-08-06$20.75$20.7534,750
1997-08-05$20.50$20.504,700
1997-08-04$20.75$20.7515,400
1997-08-01$21.25$21.2521,975
1997-07-31$22.50$22.5010,800
1997-07-30$21.50$21.506,175
1997-07-29$20.50$20.505,750
1997-07-28$20.50$20.5018,200
1997-07-25$19.50$19.5011,625
1997-07-24$19.50$19.5011,800
1997-07-23$19.50$19.508,225
1997-07-22$19.00$19.0013,625
1997-07-21$19.50$19.5012,925
1997-07-18$19.00$19.0031,950
1997-07-17$19.00$19.0013,975
1997-07-16$19.50$19.5015,325
1997-07-15$19.25$19.2519,275
1997-07-14$19.63$19.6317,300
1997-07-11$20.25$20.2512,200
1997-07-10$20.00$20.009,200
1997-07-09$20.25$20.2510,850
1997-07-08$20.00$20.006,700
1997-07-07$20.00$20.0011,925
1997-07-03$20.25$20.259,100
1997-07-02$20.25$20.2520,525
1997-07-01$20.25$20.2534,200
1997-06-30$19.75$19.7567,750
1997-06-27$25.25$25.2546,550
1997-06-26$26.50$26.509,150
1997-06-25$27.25$27.256,600
1997-06-24$28.00$28.003,075
1997-06-23$28.50$28.5014,100
1997-06-20$27.50$27.508,100
1997-06-19$27.38$27.388,275
1997-06-18$26.75$26.754,100
1997-06-17$27.50$27.509,200
1997-06-16$27.25$27.254,425
1997-06-13$26.75$26.751,925
1997-06-12$27.00$27.0038,050
1997-06-11$27.00$27.0010,525
1997-06-10$26.75$26.753,200
1997-06-09$27.50$27.5016,350
1997-06-06$25.75$25.757,825
1997-06-05$27.25$27.253,100
1997-06-04$27.50$27.504,875
1997-06-03$27.75$27.758,025
1997-06-02$27.75$27.755,625
1997-05-30$26.50$26.503,050
1997-05-29$26.00$26.0010,525
1997-05-28$28.00$28.0020,425
1997-05-27$27.00$27.0020,250
1997-05-23$26.00$26.0014,550
1997-05-22$25.25$25.2510,225
1997-05-21$24.50$24.5013,600
1997-05-20$24.75$24.7512,450
1997-05-19$25.50$25.5016,050
1997-05-16$23.00$23.009,875
1997-05-15$22.25$22.259,575
1997-05-14$22.75$22.751,450
1997-05-13$23.25$23.256,250
1997-05-12$23.75$23.754,075
1997-05-09$23.00$23.002,600
1997-05-08$23.00$23.002,925
1997-05-07$24.00$24.0019,025
1997-05-06$24.00$24.009,125
1997-05-05$25.00$25.0019,025
1997-05-02$24.25$24.2532,900
1997-05-01$22.75$22.7522,125
1997-04-30$20.50$20.507,200
1997-04-29$22.50$22.506,250
1997-04-28$22.13$22.1316,000
1997-04-25$20.00$20.002,700
1997-04-24$19.50$19.5030,100
1997-04-23$19.50$19.503,800
1997-04-22$20.25$20.258,200
1997-04-21$19.50$19.5012,425
1997-04-18$22.00$22.0016,250
1997-04-17$22.50$22.5013,100
1997-04-16$22.00$22.004,775
1997-04-15$22.25$22.254,200
1997-04-14$22.50$22.501,200
1997-04-11$22.25$22.252,700
1997-04-10$23.00$23.002,925
1997-04-09$22.50$22.5012,000
1997-04-08$22.75$22.755,550
1997-04-07$23.50$23.504,725
1997-04-04$22.50$22.501,925
1997-04-03$22.00$22.003,475
1997-04-02$23.50$23.503,925
1997-04-01$22.00$22.002,800
1997-03-31$22.25$22.254,925
1997-03-27$23.50$23.506,875
1997-03-26$22.50$22.503,450
1997-03-25$23.00$23.0014,750
1997-03-24$24.00$24.002,125
1997-03-21$23.00$23.004,000
1997-03-20$23.00$23.004,925
1997-03-19$23.25$23.254,925
1997-03-18$23.25$23.2523,350
1997-03-17$23.75$23.757,700
1997-03-14$24.50$24.508,275
1997-03-13$24.00$24.0015,825
1997-03-12$24.25$24.256,675
1997-03-11$25.00$25.004,125
1997-03-10$24.75$24.755,200
1997-03-07$25.50$25.503,575
1997-03-06$25.00$25.005,950
1997-03-05$25.00$25.008,875
1997-03-04$25.50$25.503,200
1997-03-03$26.00$26.004,025
1997-02-28$25.50$25.501,675
1997-02-27$26.25$26.254,075
1997-02-26$26.00$26.008,675
1997-02-25$26.00$26.0011,525
1997-02-24$27.50$27.501,575
1997-02-21$27.75$27.753,100
1997-02-20$27.25$27.254,950
1997-02-19$26.50$26.5023,550
1997-02-18$26.50$26.503,375
1997-02-14$27.50$27.503,625
1997-02-13$28.00$28.004,175
1997-02-12$28.00$28.006,150
1997-02-11$28.50$28.502,525
1997-02-10$28.00$28.008,775
1997-02-07$29.00$29.002,600
1997-02-06$28.75$28.756,800
1997-02-05$29.19$29.1915,750
1997-02-04$29.00$29.0071,800
1997-02-03$29.00$29.0061,425
1997-01-31$28.50$28.504,150
1997-01-30$28.25$28.257,525
1997-01-29$28.75$28.7516,100
1997-01-28$28.25$28.252,950
1997-01-27$26.50$26.504,925
1997-01-24$27.00$27.004,650
1997-01-23$27.50$27.5013,775
1997-01-22$28.50$28.506,275
1997-01-21$28.50$28.5013,300
1997-01-20$28.00$28.0019,400
1997-01-17$27.00$27.0017,125
1997-01-16$28.50$28.5083,775
1997-01-15$31.50$31.5094,450
1997-01-14$26.00$26.0010,075
1997-01-13$27.00$27.0020,450
1997-01-10$28.00$28.0010,875
1997-01-09$27.25$27.2518,625
1997-01-08$26.75$26.7513,300
1997-01-07$27.25$27.253,925
1997-01-06$27.00$27.004,650
1997-01-03$28.00$28.008,800
1997-01-02$27.75$27.7523,825