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CASTLE BIOSCIENCES INC

CSTL Net selling
CIK 0001447362 #2535 in the set updated 17 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$17.53M
$8.64M on a plan · $6.06M straight out of an exercise
Sold at will
$2.83M
7 of 205 sales
Net
−$17.53M
−$2.83M against sales at will

By person

11 insiders · 207 transactions
9.7×

Derek J. Maetzold holds 9.7 times base salary in stock. $7.33M of shares against $751.35K in salary for 2025.

Salary from the company's own proxy. The shares are what Derek J. Maetzold last reported holding, valued at $35.14, the price Common Stock was last bought or sold at on the open market here, on 15 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
MAETZOLD DEREK J
Pres. & Chief Exec. Officer
—
$10.21M (168) scheduled
−$10.21M
208,715
0.6832%
$7.33M
−51.7%
Oelschlager Kristen M
Chief Operating Officer
—
$3.19M (14) scheduled
−$3.19M
158,654
0.5193%
$5.58M
−24.5%
Juvenal Tobin W
Chief Commercial Officer
—
$2.47M (15) scheduled
−$2.47M
58,584
0.1918%
$2.06M
−1.0%
Stokes Frank
Chief Financial Officer
—
$1.46M (6)
−$1.46M
35,177
0.1151%
$1.24M
−12.2%
Cole G Bradley
Director
—
$210.73K (2) scheduled
−$210.73K
32,976
0.1079%
$1.16M
+148.1%
Goldberg Ellen
Director
—
—
—
40,921
0.1339%
$1.44M
+120.2%
Olson Tiffany
Director
—
—
—
39,573
0.1295%
$1.39M
+129.6%
Caple Kim
Director
—
—
—
36,121
0.1182%
$1.27M
+162.1%
Harrison Miles
Director
—
—
—
35,631
0.1166%
$1.25M
+168.1%
Cotton Rodney
Director
—
—
—
32,998
0.1080%
$1.16M
—
BRADBURY DANIEL
Director
—
—
—
22,340
0.0731%
$785.07K
−43.2%

Individual transactions

53
Insider
Date
Role
Action
Shares
Price
Amount
Juvenal Tobin W
15 Sep 2026
Chief Commercial Officer
Sold on a plan
3,294
$35.14
$115.76K
Juvenal Tobin W
14 Sep 2026
Chief Commercial Officer
Sold on a plan
3,306
$32.32
$106.86K
Juvenal Tobin W
31 Aug 2026
Chief Commercial Officer
Sold on a plan
1,730
$32.81
$56.76K
Juvenal Tobin W
25 Aug 2026
Chief Commercial Officer
Sold on a plan
9,050
$35.04
$317.11K
Juvenal Tobin W
17 Aug 2026
Chief Commercial Officer
Sold on a plan
1,730
$29.59
$51.19K
Juvenal Tobin W
3 Aug 2026
Chief Commercial Officer
Sold on a plan
1,730
$28.25
$48.87K
Oelschlager Kristen M
3 Aug 2026
Chief Operating Officer
Sold on a plan
1,100
$30.62
$33.68K
Oelschlager Kristen M
3 Aug 2026
Chief Operating Officer
Sold on a plan
4,486
$30.00
$134.58K
Oelschlager Kristen M
3 Aug 2026
Chief Operating Officer
Sold on a plan
3,000
$29.12
$87.36K
Juvenal Tobin W
31 Jul 2026
Chief Commercial Officer
Sold on a plan
1,891
$30.26
$57.23K
Juvenal Tobin W
31 Jul 2026
Chief Commercial Officer
Sold on a plan
7,270
$29.58
$215.04K
Juvenal Tobin W
31 Jul 2026
Chief Commercial Officer
Sold on a plan
8,149
$28.84
$235.03K
Oelschlager Kristen M
1 Jul 2026
Chief Operating Officer
Sold on a plan
400
$24.78
$9.91K
Oelschlager Kristen M
1 Jul 2026
Chief Operating Officer
Sold on a plan
8,186
$24.40
$199.74K
Oelschlager Kristen M
16 Jun 2026
Chief Operating Officer
Sold on a plan
8,587
$20.71
$177.84K
MAETZOLD DEREK J
18 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
650
$25.39
$16.50K
MAETZOLD DEREK J
17 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
18,650
$25.93
$483.59K
MAETZOLD DEREK J
16 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
126
$26.68
$3.36K
MAETZOLD DEREK J
16 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
17,449
$25.96
$453.05K
MAETZOLD DEREK J
13 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
13,204
$25.45
$336.00K
MAETZOLD DEREK J
12 Mar 2026
Pres. & Chief Exec. Officer
Sold on a plan
23,179
$25.28
$585.94K
Juvenal Tobin W
12 Mar 2026
Chief Commercial Officer
Sold on a plan
20,863
$25.24
$526.58K
Stokes Frank
5 Mar 2026
Chief Financial Officer
Sold on a plan
6,001
$27.98
$167.91K
Stokes Frank
3 Mar 2026
Chief Financial Officer
Sold on a plan
1,700
$27.81
$47.28K
Stokes Frank
3 Mar 2026
Chief Financial Officer
Sold on a plan
5,300
$27.32
$144.80K
MAETZOLD DEREK J
4 Feb 2026
Pres. & Chief Exec. Officer
Sold on a plan
171
$38.61
$6.60K
MAETZOLD DEREK J
4 Feb 2026
Pres. & Chief Exec. Officer
Sold on a plan
646
$37.82
$24.43K
MAETZOLD DEREK J
3 Feb 2026
Pres. & Chief Exec. Officer
Sold on a plan
3,200
$39.91
$127.72K
MAETZOLD DEREK J
20 Jan 2026
Pres. & Chief Exec. Officer
Sold on a plan
4,017
$40.01
$160.73K
MAETZOLD DEREK J
6 Jan 2026
Pres. & Chief Exec. Officer
Sold on a plan
1,339
$40.10
$53.69K
MAETZOLD DEREK J
5 Jan 2026
Pres. & Chief Exec. Officer
Sold on a plan
2,678
$38.09
$102.01K
MAETZOLD DEREK J
22 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
830
$40.35
$33.49K
MAETZOLD DEREK J
17 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
509
$40.04
$20.38K
MAETZOLD DEREK J
16 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
12,821
$38.55
$494.30K
MAETZOLD DEREK J
15 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
1,012
$39.30
$39.78K
MAETZOLD DEREK J
15 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
18,513
$38.75
$717.32K
MAETZOLD DEREK J
4 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
1,339
$40.03
$53.60K
MAETZOLD DEREK J
2 Dec 2025
Pres. & Chief Exec. Officer
Sold on a plan
2,678
$39.23
$105.06K
MAETZOLD DEREK J
26 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
4,258
$40.09
$170.70K
MAETZOLD DEREK J
25 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
5,115
$40.05
$204.85K
Juvenal Tobin W
24 Nov 2025
Chief Commercial Officer
Sold on a plan
1,301
$38.39
$49.95K
MAETZOLD DEREK J
18 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
2,678
$34.02
$91.11K
Juvenal Tobin W
12 Nov 2025
Chief Commercial Officer
Sold on a plan
200
$35.40
$7.08K
Oelschlager Kristen M
11 Nov 2025
Chief Operating Officer
Sold on a plan
18,932
$35.10
$664.51K
Juvenal Tobin W
11 Nov 2025
Chief Commercial Officer
Sold on a plan
500
$35.39
$17.70K
Stokes Frank
11 Nov 2025
Chief Financial Officer
Sold on a plan
5,388
$35.08
$189.01K
MAETZOLD DEREK J
5 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
2,678
$31.85
$85.30K
MAETZOLD DEREK J
4 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
237
$31.12
$7.37K
MAETZOLD DEREK J
4 Nov 2025
Pres. & Chief Exec. Officer
Sold on a plan
6,458
$30.41
$196.41K
Oelschlager Kristen M
31 Oct 2025
Chief Operating Officer
Sold on a plan
12,678
$25.04
$317.46K
MAETZOLD DEREK J
20 Oct 2025
Pres. & Chief Exec. Officer
Sold on a plan
1,339
$22.44
$30.05K
MAETZOLD DEREK J
2 Oct 2025
Pres. & Chief Exec. Officer
Sold on a plan
1,339
$22.58
$30.23K
MAETZOLD DEREK J
17 Sep 2025
Pres. & Chief Exec. Officer
Sold on a plan
1,339
$21.97
$29.42K
Show all 207 transactions →

What was left out

Form 4 filings counted 84
Amendments (4/A) skipped 2
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 53
Sales straight out of an exercise 145
Sales at will 7
Transactions with no price 0
Shares from compensation/vesting 688,682
History held since 31 Jul 2019