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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
CYANOTECH CORP: CYAN
Price: 10/31/25 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$0.32 $0.78 $0.21 $2 7 6 0.0% 0.0% 0.00% 32.87%
Exch Sector Industry Sub-Industry
OTC Market Manufacturing Chemicals And Allied Products Medicinal Chemicals & Botanical Products
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
MULDER DAVID M
DIR
JB
---
50,000
---
8/28/25
---
---
203,468
32.6
D
---
9/2/25 - 6:19:32 pm
2
    
 
VIED DAVID L
DIR
JB
---
50,000
---
8/28/25
---
---
225,138
28.5
D
---
9/2/25 - 6:14:29 pm
3
    
 
DAVIS MICHAEL A
DIR,BO
JB
---
50,000
---
8/28/25
---
---
1,528,598
3.4
I
---
9/2/25 - 6:11:33 pm
4
    
 
MIYASHIRO JENNIFER A S
CFO,VP,TR
3
---
---
---
8/21/25
---
---
---
---
---
---
9/12/25 - 3:24:28 pm
5
    
 
CUSTER MATTHEW KEITH
PR,CEO,DIR
JB
---
2,075
---
7/29/25
---
---
6,754
44.3
D
R
7/31/25 - 1:32:48 pm
6
    
 
NORDIN AMY BETH
VP,HR,SEC
JS
$213
525
---
7/29/25
---
$0.40
9,051
-5.5
D
R
7/31/25 - 1:30:27 pm
7
    
 
NORDIN AMY BETH
VP,HR,SEC
JB
---
1,502
---
7/29/25
---
---
9,576
18.6
D
R
7/31/25 - 1:30:27 pm
8
    
 
JOHANSEN JENNIFER M
VP,LO
JS
$210
518
---
7/29/25
---
$0.40
9,743
-5.0
D
R
7/31/25 - 1:27:55 pm
9
    
 
JOHANSEN JENNIFER M
VP,LO
JB
---
1,380
---
7/29/25
---
---
10,261
15.5
D
R
7/31/25 - 1:27:55 pm
10
    
 
CYSEWSKI GERALD R
O
JS
$240
592
---
7/29/25
---
$0.40
146,697
-0.4
D
R
7/31/25 - 1:25:20 pm
11
    
 
CYSEWSKI GERALD R
O
JB
---
1,577
---
7/29/25
---
---
147,289
1.1
D
R
7/31/25 - 1:25:20 pm
12
    
 
JENSEN GLENN
VP,OO
JS
$250
617
---
7/29/25
---
$0.40
27,110
-2.2
D
R
7/31/25 - 1:22:12 pm
13
    
 
JENSEN GLENN
VP,OO
JB
---
1,642
---
7/29/25
---
---
27,727
6.3
D
R
7/31/25 - 1:22:12 pm
14
    
 
BRAND JENNIFER KIMBERLY
VP,SO
3
---
---
---
5/12/25
---
---
---
---
---
---
5/20/25 - 3:31:26 pm
15
    
 
KAKUK COLLETTE NICOLE
O
JS
$4
14
---
4/7/25
---
$0.31
4,707
-0.3
D
R
4/9/25 - 5:01:55 pm
16
    
 
KAKUK COLLETTE NICOLE
O
JB
---
33
---
4/7/25
---
---
4,721
0.7
D
R
4/9/25 - 5:01:55 pm
17
    
 
NORDIN AMY BETH
VP,HR,SEC
JS
$4
12
---
4/7/25
---
$0.31
8,074
-0.1
D
R
4/9/25 - 4:29:57 pm
18
    
 
NORDIN AMY BETH
VP,HR,SEC
JB
---
33
---
4/7/25
---
---
8,086
0.4
D
R
4/9/25 - 4:29:57 pm
19
    
 
JOHANSEN JENNIFER M
VP,LO
JS
$4
13
---
4/7/25
---
$0.31
8,881
-0.1
D
R
4/9/25 - 4:21:04 pm
20
    
 
JOHANSEN JENNIFER M
VP,LO
JB
---
33
---
4/7/25
---
---
8,894
0.4
D
R
4/9/25 - 4:21:04 pm
21
    
 
JENSEN GLENN
VP,OO
JS
$4
13
---
4/7/25
---
$0.31
26,085
-0.0
D
R
4/9/25 - 4:12:33 pm
22
    
 
JENSEN GLENN
VP,OO
JB
---
33
---
4/7/25
---
---
26,098
0.1
D
R
4/9/25 - 4:12:33 pm
23
    
 
CUSTER MATTHEW KEITH
PR,CEO,DIR
JB
---
33
---
4/7/25
---
---
4,679
0.7
D
R
4/9/25 - 4:01:34 pm
24
    
 
CYSEWSKI GERALD R
O
JS
$4
13
---
4/7/25
---
$0.31
145,712
-0.0
D
R
4/9/25 - 3:51:29 pm
25
    
 
CYSEWSKI GERALD R
O
JB
---
33
---
4/7/25
---
---
145,725
0.0
D
R
4/9/25 - 3:51:29 pm
26
    
 
KAKUK COLLETTE NICOLE
O
JS
$622
1,556
---
2/18/25
---
$0.40
4,688
-24.9
D
R
2/20/25 - 3:34:32 pm
27
    
 
KAKUK COLLETTE NICOLE
O
JB
---
3,900
---
2/18/25
---
---
6,244
166.4
D
R
2/20/25 - 3:34:32 pm
28
    
 
NORDIN AMY BETH
VP,HR,SEC
JS
$476
1,189
---
2/18/25
---
$0.40
8,053
-12.9
D
R
2/20/25 - 3:15:08 pm
29
    
 
NORDIN AMY BETH
VP,HR,SEC
JB
---
3,400
---
2/18/25
---
---
9,242
58.2
D
R
2/20/25 - 3:15:08 pm
30
    
 
JOHANSEN JENNIFER M
VP,LO
JS
$480
1,201
---
2/18/25
---
$0.40
8,861
-11.9
D
R
2/20/25 - 3:05:20 pm
31
    
 
JOHANSEN JENNIFER M
VP,LO
JB
---
3,200
---
2/18/25
---
---
10,062
46.6
D
R
2/20/25 - 3:05:20 pm
32
    
 
JENSEN GLENN
VP,OO
JS
$536
1,340
---
2/18/25
---
$0.40
26,065
-4.9
D
R
2/20/25 - 2:57:38 pm
33
    
 
JENSEN GLENN
VP,OO
JB
---
3,570
---
2/18/25
---
---
27,405
15.0
D
R
2/20/25 - 2:57:38 pm
34
    
 
CYSEWSKI GERALD R
O
JS
$586
1,464
---
2/18/25
---
$0.40
145,692
-1.0
D
R
2/20/25 - 2:50:04 pm
35
    
 
CYSEWSKI GERALD R
O
JB
---
3,900
---
2/18/25
---
---
147,156
2.7
D
R
2/20/25 - 2:50:04 pm
36
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$3,800
5,000
---
10/1/24
---
$0.76
1,465,440
0.3
I
R,10b
10/3/24 - 3:27:06 pm
37
    
 
DAVIS MICHAEL A
DIR,BO
JB
$10,000
13,158
---
10/1/24
---
$0.76
1,478,598
0.9
I
R,10b
10/3/24 - 3:27:06 pm
38
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$7,650
10,000
9/27/24
9/30/24
---
$0.76
1,460,440
0.7
I
10b
10/1/24 - 4:42:34 pm
39
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$7,700
10,000
9/25/24
9/26/24
---
$0.77
1,450,440
0.7
I
10b
9/27/24 - 1:33:41 pm
40
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
AB
$3,650
5,000
---
9/24/24
---
$0.73
1,440,440
0.3
I
10b
9/25/24 - 4:46:39 pm
41
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
AB
$3,850
5,000
---
9/23/24
---
$0.77
1,435,440
0.3
I
10b
9/25/24 - 4:46:39 pm
42
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$7,550
10,000
9/19/24
9/20/24
$0.74
$0.77
1,430,440
0.7
I
10b
9/23/24 - 2:57:03 pm
43
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$6,860
9,000
9/17/24
9/18/24
$0.74
$0.78
1,420,440
0.6
I
10b
9/19/24 - 5:01:41 pm
44
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
AB
$720
1,000
---
9/17/24
---
$0.72
1,415,440
0.1
I
10b
9/19/24 - 5:01:41 pm
45
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$8,200
10,000
9/13/24
9/16/24
---
$0.82
1,410,440
0.7
I
10b
9/17/24 - 4:20:44 pm
46
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$8,300
10,000
9/11/24
9/12/24
---
$0.83
1,400,440
0.7
I
10b
9/13/24 - 4:12:42 pm
47
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$8,350
10,000
9/9/24
9/10/24
---
$0.83
1,323,773
0.8
I
R,10b
9/11/24 - 5:49:22 pm
48
    
 
DAVIS MICHAEL A
DIR,BO
JB
$50,000
66,667
---
9/10/24
---
$0.75
1,390,440
5.0
I
R,10b
9/11/24 - 5:49:22 pm
49
1y
78
38%
1%
1
DAVIS MICHAEL A
DIR,BO
JB*
$8,400
10,000
9/5/24
9/6/24
---
$0.84
1,313,773
0.8
I
10b
9/9/24 - 3:47:29 pm
50
    
 
ROGERSON JENNIFER CHARLENE
CFO,VP,TR
3
---
---
---
9/5/24
---
---
---
---
---
---
9/9/24 - 4:12:06 pm
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