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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
2026-05-22 Caple Kim Director Option exercise · Restricted Stock Units −13,667 0
2026-05-22 Cotton Rodney Director Option exercise +13,667 32,998
2026-05-22 Cotton Rodney Director Option exercise · Restricted Stock Units −13,667 0
2026-05-22 Cole G Bradley Director Option exercise +13,667 32,976
2026-05-22 Cole G Bradley Director Option exercise · Restricted Stock Units −13,667 0
2026-05-21 Juvenal Tobin W Chief Commercial Officer Option exercise +11,210 $3.38 $38K 98,035
2026-05-21 Juvenal Tobin W Chief Commercial Officer Option exercise · Stock option (right to buy) −11,210 0
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +420 $2.39 $1K 21,899
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −420 $20.20 $8K 21,479
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −1,035 $20.20 $21K 44,781
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −880 $20.20 $18K 38,061
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −212 $20.20 $4K 1,946
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −212 $20.20 $4K 1,946
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −212 $20.20 $4K 1,946
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −212 $20.20 $4K 1,946
2026-05-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −420 204
2026-05-20 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +130 $2.39 $311 21,609
2026-05-20 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −130 $20.00 $3K 21,479
2026-05-20 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −322 $20.00 $6K 45,816
2026-05-20 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −273 $20.00 $5K 38,941

Page 10 of 45 · 897 trades