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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
2025-12-11 Stokes Frank Chief Financial Officer Sale −4,496 $37.45 $168K 50,326
2025-12-10 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise +15,424 73,285
2025-12-10 MAETZOLD DEREK J Pres. & Chief Exec. Officer Shares withheld for taxes −6,070 $38.02 $231K 67,215
2025-12-10 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Restricted Stock Units −15,424 0
2025-12-10 Oelschlager Kristen M Chief Operating Officer Option exercise +6,170 29,763
2025-12-10 Oelschlager Kristen M Chief Operating Officer Shares withheld for taxes −2,552 $38.02 $97K 27,211
2025-12-10 Oelschlager Kristen M Chief Operating Officer Option exercise · Restricted Stock Units −6,170 0
2025-12-10 Stokes Frank Chief Financial Officer Option exercise +6,170 57,580
2025-12-10 Stokes Frank Chief Financial Officer Shares withheld for taxes −2,758 $38.02 $105K 54,822
2025-12-10 Stokes Frank Chief Financial Officer Option exercise · Restricted Stock Units −6,170 0
2025-12-10 Juvenal Tobin W Chief Commercial Officer Option exercise +6,170 102,515
2025-12-10 Juvenal Tobin W Chief Commercial Officer Shares withheld for taxes −2,490 $38.02 $95K 100,025
2025-12-10 Juvenal Tobin W Chief Commercial Officer Option exercise · Restricted Stock Units −6,170 0
2025-12-09 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise +33,495 71,042
2025-12-09 MAETZOLD DEREK J Pres. & Chief Exec. Officer Shares withheld for taxes −13,181 $38.25 $504K 57,861
2025-12-09 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Restricted Stock Units −33,495 33,496
2025-12-09 Oelschlager Kristen M Chief Operating Officer Option exercise +15,961 28,284
2025-12-09 Oelschlager Kristen M Chief Operating Officer Shares withheld for taxes −4,691 $38.25 $179K 23,593
2025-12-09 Oelschlager Kristen M Chief Operating Officer Option exercise · Restricted Stock Units −15,961 15,961
2025-12-09 Stokes Frank Chief Financial Officer Option exercise +14,616 57,944

Page 17 of 45 · 897 trades