Cyanotech Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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 22, 2025	0.34	0.34	0.34	0.34	0.34	-	-
Oct 21, 2025	0.34	0.34	0.34	0.34	0.34	17.24%	518
Oct 20, 2025	0.29	0.29	0.29	0.29	0.29	-	10
Oct 17, 2025	0.29	0.29	0.29	0.29	0.29	-	8
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 13, 2025	0.33	0.33	0.33	0.33	0.33	-	1
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 8, 2025	0.34	0.34	0.34	0.34	0.34	-	-
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	0.89%	251
Sep 24, 2025	0.27	0.33	0.27	0.30	0.30	2.54%	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 19, 2025	0.30	0.30	0.30	0.30	0.30	-	53
Sep 18, 2025	0.27	0.33	0.27	0.30	0.30	10.00%	29,362
Sep 17, 2025	0.27	0.27	0.27	0.27	0.27	-	70
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 8, 2025	0.30	0.30	0.30	0.30	0.30	-	137
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
Aug 28, 2025	0.32	0.32	0.28	0.28	0.28	-3.38%	2,150
Aug 27, 2025	0.29	0.29	0.29	0.29	0.29	-	2
Aug 26, 2025	0.29	0.29	0.29	0.29	0.29	-	40
Aug 25, 2025	0.28	0.29	0.28	0.29	0.29	-8.23%	692
Aug 22, 2025	0.29	0.32	0.29	0.32	0.32	5.33%	1,100
Aug 21, 2025	0.30	0.30	0.30	0.30	0.30	-	30
Aug 20, 2025	0.30	0.30	0.30	0.30	0.30	-	2