Cyanotech Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Dec 31, 2025	0.39	0.45	0.39	0.45	0.45	9.76%	9,667
Dec 30, 2025	0.37	0.45	0.37	0.41	0.41	10.81%	18,600
Dec 29, 2025	0.32	0.45	0.32	0.37	0.37	2.81%	39,149
Dec 26, 2025	0.35	0.36	0.32	0.36	0.36	5.85%	4,256
Dec 24, 2025	0.34	0.34	0.34	0.34	0.34	13.14%	502
Dec 23, 2025	0.34	0.35	0.30	0.30	0.30	-6.09%	3,170
Dec 22, 2025	0.35	0.36	0.32	0.32	0.32	-8.57%	11,653
Dec 19, 2025	0.40	0.40	0.35	0.35	0.35	-9.98%	9,265
Dec 18, 2025	0.36	0.39	0.36	0.39	0.39	-2.80%	1,200
Dec 16, 2025	0.36	0.40	0.36	0.40	0.40	2.88%	12,700
Dec 15, 2025	0.45	0.45	0.36	0.39	0.39	-13.60%	18,960
Dec 11, 2025	0.40	0.45	0.40	0.45	0.45	2.97%	1,695
Dec 10, 2025	0.44	0.44	0.44	0.44	0.44	-18.88%	100
Dec 9, 2025	0.40	0.54	0.40	0.54	0.54	-1.82%	692
Dec 8, 2025	0.45	0.55	0.44	0.55	0.55	16.74%	21,300
Dec 5, 2025	0.42	0.48	0.40	0.47	0.47	30.56%	49,878
Dec 4, 2025	0.36	0.36	0.36	0.36	0.36	-37.28%	217
Dec 2, 2025	0.34	0.57	0.34	0.57	0.57	64.00%	2,918
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