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CASTLE BIOSCIENCES INC

CSTL Net selling

CIK 0001447362 #2535 in the set updated 17 Sep 2026

Bought (1 mo)

$0.00

out of their own pocket, the only kind of buying there is

Sold (1 mo)

$2.71M

$647.68K on a plan · $1.22M straight out of an exercise

Sold at will

$837.86K

3 of 30 sales

Net

−$2.71M

−$837.86K against sales at will

By person

11 insiders · 30 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

—

$1.08M (20) scheduled

−$1.08M

208,715

0.6832%

$7.33M

−51.7%

Oelschlager Kristen M

Chief Operating Officer

—

$976.51K (5)

−$976.51K

158,654

0.5193%

$5.58M

−24.5%

Juvenal Tobin W

Chief Commercial Officer

—

$647.68K (5) scheduled

−$647.68K

58,584

0.1918%

$2.06M

−1.0%

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%

Stokes Frank

Chief Financial Officer

—

35,177

0.1151%

$1.24M

−12.2%

Cotton Rodney

Director

—

32,998

0.1080%

$1.16M

—

Cole G Bradley

Director

—

32,976

0.1079%

$1.16M

+148.1%

BRADBURY DANIEL

Director

—

22,340

0.0731%

$785.07K

−43.2%

Individual transactions

Insider

Date

Role

Action

Price

Amount

Oelschlager Kristen M

25 Aug 2026

Chief Operating Officer

Sell indirect

5,223

$34.64

$180.92K

Oelschlager Kristen M

25 Aug 2026

Chief Operating Officer

Sell indirect

7,161

$34.26

$245.36K

Oelschlager Kristen M

24 Aug 2026

Chief Operating Officer

Sell indirect

12,218

$33.69

$411.59K

Show all 30 transactions →

What was left out

Form 4 filings counted 10

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 0

Sales on a Rule 10b5-1 plan 5

Sales straight out of an exercise 22

Sales at will 3

Transactions with no price 0

Shares from compensation/vesting 25,164

History held since 31 Jul 2019