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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
$5,877,844
in 19 filings, $4.9M under 10b5-1 plans

Net −$5,877,844. 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 −$1.7M Chief Commercial Officer sold 60% 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
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −1,153 $20.86 $24K 36,908
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $20.86 $6K 1,668
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $20.86 $6K 1,668
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $20.86 $6K 1,668
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $20.86 $6K 1,668
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −204 0
2026-06-01 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −6,010 92,431
2026-05-28 Olson Tiffany Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 Goldberg Ellen Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 Harrison Miles Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 Cotton Rodney Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 Caple Kim Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 BRADBURY DANIEL Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-28 Cole G Bradley Director Grant or award · Restricted Stock Units +11,766 11,766
2026-05-22 BRADBURY DANIEL Director Option exercise +13,667 22,340
2026-05-22 BRADBURY DANIEL Director Option exercise · Restricted Stock Units −13,667 0
2026-05-22 Harrison Miles Director Option exercise +13,667 35,631
2026-05-22 Harrison Miles Director Option exercise · Restricted Stock Units −13,667 0
2026-05-22 Olson Tiffany Director Option exercise +13,667 39,573
2026-05-22 Olson Tiffany Director Option exercise · Restricted Stock Units −13,667 0

Page 9 of 45 · 900 trades