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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:
CASTLE BIOSCIENCES INC: CSTL
Price: 12/5/25 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
$38.64 $40.61 $14.59 $1,128 29 396 0.0% 6.4% 92.41% 2.72%
Exch Sector Industry Sub-Industry
NasdaqGM Services Health Services Services- Medical Laboratories
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#
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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
    
 
MAETZOLD DEREK J
PR,CEO,DIR
JS
$734,955
19,251
12/9/25
12/10/25
---
$38.02
57,861
-25.0
D
R
12/11/25 - 6:48:55 pm
2
    
 
MAETZOLD DEREK J
PR,CEO,DIR
JB
---
48,919
12/9/25
12/10/25
---
---
73,285
200.8
D
R
12/11/25 - 6:48:55 pm
3
    
 
OELSCHLAGER KRISTEN M
COO
JS
$276,458
7,243
12/9/25
12/10/25
---
$38.02
23,593
-23.5
D
R
12/11/25 - 6:47:40 pm
4
    
 
OELSCHLAGER KRISTEN M
COO
JB
---
22,131
12/9/25
12/10/25
---
---
29,763
290.0
D
R
12/11/25 - 6:47:40 pm
5
    
 
STOKES FRANK
CFO
JS
$354,785
9,292
12/9/25
12/10/25
---
$38.02
51,410
-15.3
D
R
12/11/25 - 6:46:17 pm
6
    
 
STOKES FRANK
CFO
JB
---
20,786
12/9/25
12/10/25
---
---
57,944
55.9
D
R
12/11/25 - 6:46:17 pm
7
    
 
JUVENAL TOBIN W
O
JS
$341,038
8,931
12/9/25
12/10/25
---
$38.02
96,345
-8.5
D
R
12/11/25 - 6:44:42 pm
8
    
 
JUVENAL TOBIN W
O
JB
---
22,131
12/9/25
12/10/25
---
---
102,786
27.4
D
R
12/11/25 - 6:44:42 pm
9
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$53,600
1,339
---
12/4/25
---
$40.03
37,547
-3.4
D
10b
12/8/25 - 4:28:54 pm
10
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$105,058
2,678
---
12/2/25
---
$39.23
38,886
-6.4
D
10b
12/4/25 - 4:08:04 pm
11
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$170,703
4,258
---
11/26/25
---
$40.09
41,564
-9.3
D
10b
12/1/25 - 4:09:05 pm
12
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$204,851
5,115
---
11/25/25
---
$40.05
45,822
-10.0
D
10b
11/26/25 - 2:58:53 pm
13
    
 
JUVENAL TOBIN W
O
OS
$166,977
4,693
---
11/20/25
---
$35.58
84,595
-5.3
D
10b
11/24/25 - 4:24:11 pm
14
    
 
JUVENAL TOBIN W
O
OE
$15,862
4,693
---
11/20/25
---
$3.38
89,288
5.5
D
10b
11/24/25 - 4:24:11 pm
15
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$91,106
2,678
---
11/18/25
---
$34.02
50,937
-5.0
D
10b
11/20/25 - 4:07:28 pm
16
    
 
JUVENAL TOBIN W
O
AS
$24,775
700
11/11/25
11/12/25
$35.39
$35.40
84,527
-0.8
D
A,10b
11/14/25 - 4:09:51 pm
17
    
 
JUVENAL TOBIN W
O
OE
$2,366
700
11/11/25
11/12/25
---
$3.38
85,027
0.8
D
A,10b
11/14/25 - 4:09:51 pm
18
    
 
JUVENAL TOBIN W
O
AS
$24,775
700
11/11/25
11/12/25
$35.39
$35.40
83,827
-0.8
D
10b
11/13/25 - 4:08:16 pm
19
    
 
STOKES FRANK
CFO
AS
$189,011
5,388
---
11/11/25
---
$35.08
43,328
-11.1
D
10b
11/13/25 - 4:08:51 pm
20
    
 
OELSCHLAGER KRISTEN M
COO
AS
$664,513
18,932
---
11/11/25
---
$35.10
12,323
-60.6
D
10b
11/13/25 - 4:07:38 pm
21
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$289,079
9,373
11/4/25
11/5/25
$30.41
$31.85
53,615
-14.9
D
10b
11/6/25 - 4:08:21 pm
22
    
 
OELSCHLAGER KRISTEN M
COO
AS
$317,457
12,678
---
10/31/25
---
$25.04
27,569
-31.5
D
10b
11/4/25 - 8:56:27 pm
23
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$30,047
1,339
---
10/20/25
---
$22.44
62,988
-2.1
D
10b
10/23/25 - 9:30:46 am
24
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$30,235
1,339
---
10/2/25
---
$22.58
64,327
-2.0
D
10b
10/6/25 - 4:11:49 pm
25
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$29,419
1,339
---
9/17/25
---
$21.97
65,666
-2.0
D
10b
9/19/25 - 4:05:11 pm
26
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$32,042
1,339
---
9/2/25
---
$23.93
67,005
-2.0
D
10b
9/4/25 - 4:04:12 pm
27
    
 
OELSCHLAGER KRISTEN M
COO
S
$390,572
18,007
---
8/27/25
---
$21.69
100,937
-15.1
I
A
11/4/25 - 8:38:01 pm
28
    
 
OELSCHLAGER KRISTEN M
COO
AS
$279,135
12,677
---
8/27/25
---
$22.02
141,116
-8.2
D
10b
8/29/25 - 4:04:45 pm
29
    
 
OELSCHLAGER KRISTEN M
COO
S
$390,572
18,007
---
8/27/25
---
$21.69
153,793
-10.5
D
---
8/29/25 - 4:04:06 pm
30
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$26,834
1,339
---
8/15/25
---
$20.04
68,344
-1.9
D
10b
8/19/25 - 4:04:43 pm
31
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$839,043
43,019
---
8/13/25
---
$19.50
69,683
-38.2
D
10b
8/15/25 - 4:14:28 pm
32
    
 
MAETZOLD DEREK J
PR,CEO,DIR
JS
$464,098
23,972
---
8/8/25
---
$19.36
112,702
-17.5
D
---
8/12/25 - 4:32:21 pm
33
    
 
MAETZOLD DEREK J
PR,CEO,DIR
JB
---
66,991
---
8/8/25
---
---
136,674
96.1
D
---
8/12/25 - 4:32:21 pm
34
    
 
STOKES FRANK
CFO
JS
$84,332
4,356
---
8/8/25
---
$19.36
48,716
-8.2
D
---
8/12/25 - 4:31:38 pm
35
    
 
STOKES FRANK
CFO
JB
---
9,744
---
8/8/25
---
---
53,072
22.5
D
---
8/12/25 - 4:31:38 pm
36
    
 
OELSCHLAGER KRISTEN M
COO
JS
$54,285
2,804
---
8/8/25
---
$19.36
171,800
-1.6
D
---
8/12/25 - 4:31:12 pm
37
    
 
OELSCHLAGER KRISTEN M
COO
JB
---
10,640
---
8/8/25
---
---
174,604
6.5
D
---
8/12/25 - 4:31:12 pm
38
    
 
JUVENAL TOBIN W
O
JS
$83,132
4,294
---
8/8/25
---
$19.36
84,527
-4.8
D
---
8/12/25 - 4:30:28 pm
39
    
 
JUVENAL TOBIN W
O
JB
---
10,640
---
8/8/25
---
---
88,821
13.6
D
---
8/12/25 - 4:30:28 pm
40
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$100,363
4,944
---
6/27/25
---
$20.30
69,683
-6.6
D
10b
7/1/25 - 4:05:26 pm
41
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$357,930
17,632
---
6/27/25
---
$20.30
3,615
-83.0
I
10b
7/1/25 - 4:05:26 pm
42
    
 
COLE G BRADLEY
DIR
JB
---
8,673
---
5/21/25
---
---
21,964
65.3
D
R
5/23/25 - 5:01:17 pm
43
    
 
BRADBURY DANIEL
DIR
JB
---
8,673
---
5/21/25
---
---
8,673
New
D
R
5/23/25 - 4:19:15 pm
44
    
 
COTTON RODNEY
DIR
JB
---
8,673
---
5/21/25
---
---
14,002
162.8
D
R
5/23/25 - 4:17:29 pm
45
    
 
CAPLE KIM
DIR
JB
---
8,673
---
5/21/25
---
---
22,454
62.9
D
R
5/23/25 - 4:16:13 pm
46
    
 
GOLDBERG ELLEN
DIR
JB
---
8,673
---
5/21/25
---
---
27,254
46.7
D
R
5/23/25 - 4:14:18 pm
47
    
 
OLSON TIFFANY
DIR
JB
---
8,673
---
5/21/25
---
---
25,906
50.3
D
R
5/23/25 - 4:12:49 pm
48
    
 
HARRISON MILES
DIR
JB
---
8,673
---
5/21/25
---
---
21,964
65.3
D
R
5/23/25 - 4:10:47 pm
49
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$26,596
1,236
---
4/21/25
---
$21.52
74,627
-1.6
D
10b
4/23/25 - 4:08:14 pm
50
    
 
MAETZOLD DEREK J
PR,CEO,DIR
AS
$94,851
4,408
---
4/21/25
---
$21.52
4,275
-50.8
I
10b
4/23/25 - 4:08:14 pm
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