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CIK 0001447362 · Accelerated filer

CASTLE BIOSCIENCES INC

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Ticker
CSTL
Exchange
Nasdaq
Industry
Services-Medical Laboratories
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
770701774
Phone
866-788-9007
Business address
1500 W. PARKWOOD AVE., SUITE 400, FRIENDSWOOD, TX, 77546
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$5,765,795
in 18 filings, $4.9M under 10b5-1 plans

Net −$5,765,795. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. MAETZOLD DEREK J −$3.1M Pres. & Chief Exec. Officer sold 98% of stake
  2. Juvenal Tobin W −$1.5M Chief Commercial Officer sold 58% of stake
  3. Oelschlager Kristen M −$1.1M Chief Operating Officer sold 71% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-03-04 MAETZOLD DEREK J Pres. & Chief Exec. Officer Shares withheld for taxes −17,931 $28.17 $505K 105,821
2026-03-04 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Restricted Stock Units −31,110 62,218
2026-03-04 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Restricted Stock Units −27,987 83,961
2026-03-04 Stokes Frank Chief Financial Officer Option exercise 10b5-1 +24,146 73,018
2026-03-04 Stokes Frank Chief Financial Officer Shares withheld for taxes 10b5-1 −10,732 $28.17 $302K 62,286
2026-03-04 Stokes Frank Chief Financial Officer Option exercise 10b5-1 +3,800 $3.38 $13K 66,086
2026-03-04 Stokes Frank Chief Financial Officer Option exercise · Restricted Stock Units 10b5-1 −12,186 24,372
2026-03-04 Stokes Frank Chief Financial Officer Option exercise · Restricted Stock Units 10b5-1 −11,960 35,878
2026-03-04 Stokes Frank Chief Financial Officer Option exercise · Stock option (right to buy) 10b5-1 −3,800 14,912
2026-03-03 Juvenal Tobin W Chief Commercial Officer Shares withheld for taxes −3,716 $27.57 $102K 92,316
2026-03-03 Juvenal Tobin W Chief Commercial Officer Grant or award · Restricted Stock Units +48,367 48,367
2026-03-03 Oelschlager Kristen M Chief Operating Officer Shares withheld for taxes −2,427 $27.57 $67K 20,068
2026-03-03 Oelschlager Kristen M Chief Operating Officer Grant or award · Restricted Stock Units +48,367 48,367
2026-03-03 MAETZOLD DEREK J Pres. & Chief Exec. Officer Shares withheld for taxes −19,043 $27.57 $525K 64,655
2026-03-03 MAETZOLD DEREK J Pres. & Chief Exec. Officer Grant or award · Restricted Stock Units +102,597 102,597
2026-03-03 Stokes Frank Chief Financial Officer Sale 10b5-1 −5,300 $27.32 $145K 54,183
2026-03-03 Stokes Frank Chief Financial Officer Sale 10b5-1 −1,700 $27.81 $47K 52,483
2026-03-03 Stokes Frank Chief Financial Officer Shares withheld for taxes 10b5-1 −3,611 $27.57 $100K 48,872
2026-03-03 Stokes Frank Chief Financial Officer Grant or award · Restricted Stock Units 10b5-1 +48,367 48,367
2026-02-04 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −646 $37.82 $24K 83,869

Page 15 of 45 · 897 trades