Cyanotech Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Dec 1, 2025	0.35	0.35	0.35	0.35	0.35	2.94%	1,101
Nov 26, 2025	0.38	0.46	0.34	0.34	0.34	1.49%	4,512
Nov 25, 2025	0.34	0.34	0.34	0.34	0.34	-	4,920
Nov 24, 2025	0.34	0.34	0.34	0.34	0.34	-0.36%	2,822
Nov 21, 2025	0.34	0.45	0.34	0.34	0.34	-29.15%	2,726
Nov 20, 2025	0.36	0.47	0.36	0.47	0.47	18.62%	270
Nov 19, 2025	0.39	0.40	0.34	0.40	0.40	-	7,575
Nov 18, 2025	0.32	0.40	0.32	0.40	0.40	-	708
Nov 14, 2025	0.32	0.40	0.32	0.40	0.40	25.00%	6,040
Nov 13, 2025	0.32	0.32	0.32	0.32	0.32	-18.30%	174
Nov 12, 2025	0.33	0.40	0.30	0.39	0.39	0.44%	700
Nov 11, 2025	0.39	0.39	0.39	0.39	0.39	1.30%	5,001
Nov 10, 2025	0.33	0.39	0.29	0.39	0.39	27.74%	44,637
Nov 4, 2025	0.29	0.30	0.29	0.30	0.30	-5.22%	400
Oct 30, 2025	0.32	0.32	0.32	0.32	0.32	2.58%	686
Oct 29, 2025	0.32	0.32	0.31	0.31	0.31	-0.19%	14,690
Oct 28, 2025	0.25	0.31	0.25	0.31	0.31	-2.33%	455
Oct 27, 2025	0.25	0.32	0.25	0.32	0.32	13.57%	6,996
Oct 24, 2025	0.33	0.33	0.26	0.28	0.28	-15.15%	9,352
Oct 23, 2025	0.29	0.33	0.29	0.33	0.33	-2.94%	820
Oct 21, 2025	0.34	0.34	0.34	0.34	0.34	17.24%	518
Oct 16, 2025	0.29	0.29	0.29	0.29	0.29	-13.43%	1,005
Oct 15, 2025	0.27	0.34	0.27	0.34	0.34	15.52%	310
Oct 14, 2025	0.27	0.34	0.27	0.29	0.29	-12.12%	5,380
Oct 10, 2025	0.33	0.33	0.33	0.33	0.33	-	500
Oct 9, 2025	0.33	0.33	0.33	0.33	0.33	-2.94%	700
Oct 7, 2025	0.34	0.34	0.34	0.34	0.34	3.03%	160
Oct 6, 2025	0.33	0.34	0.33	0.33	0.33	-	7,801
Oct 3, 2025	0.33	0.33	0.33	0.33	0.33	-3.57%	1,705
Oct 2, 2025	0.35	0.35	0.29	0.34	0.34	15.69%	850
Oct 1, 2025	0.30	0.30	0.30	0.30	0.30	-1.92%	101
Sep 30, 2025	0.35	0.35	0.30	0.30	0.30	-13.33%	392
Sep 29, 2025	0.35	0.35	0.35	0.35	0.35	-0.57%	181
Sep 26, 2025	0.33	0.35	0.33	0.35	0.35	16.67%	8,025
Sep 25, 2025	0.30	0.30	0.30	0.30	0.30	0.87%	251
Sep 24, 2025	0.27	0.33	0.27	0.30	0.30	2.55%	2,417
Sep 23, 2025	0.29	0.30	0.29	0.29	0.29	1.05%	8,900
Sep 22, 2025	0.27	0.29	0.27	0.29	0.29	-3.37%	1,977
Sep 18, 2025	0.27	0.33	0.27	0.30	0.30	10.00%	29,362
Sep 16, 2025	0.28	0.28	0.24	0.27	0.27	-1.82%	72,125
Sep 15, 2025	0.28	0.28	0.28	0.28	0.28	-5.98%	1,000
Sep 12, 2025	0.29	0.29	0.27	0.29	0.29	-2.50%	3,426
Sep 11, 2025	0.30	0.30	0.29	0.30	0.30	-	3,841
Sep 10, 2025	0.26	0.30	0.26	0.30	0.30	15.38%	3,500
Sep 9, 2025	0.25	0.27	0.25	0.26	0.26	-13.33%	40,010
Sep 5, 2025	0.28	0.30	0.25	0.30	0.30	3.45%	4,800
Sep 4, 2025	0.28	0.29	0.28	0.29	0.29	3.57%	356
Sep 3, 2025	0.28	0.28	0.28	0.28	0.28	-	100
Sep 2, 2025	0.28	0.28	0.28	0.28	0.28	-17.65%	600
Aug 29, 2025	0.34	0.34	0.34	0.34	0.34	21.34%	150