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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
2026-02-04 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −171 $38.61 $7K 83,698
2026-02-03 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −3,200 $39.91 $128K 84,515
2026-01-20 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −4,017 $40.01 $161K 87,715
2026-01-12 Oelschlager Kristen M Chief Operating Officer Grant or award +9,207 21,530
2026-01-12 Oelschlager Kristen M Chief Operating Officer Grant or award · Performance-Based Stock Unit +9,207 9,207
2026-01-12 Juvenal Tobin W Chief Commercial Officer Grant or award +9,207 96,032
2026-01-12 Juvenal Tobin W Chief Commercial Officer Grant or award · Performance-Based Stock Unit +9,207 9,207
2026-01-12 Stokes Frank Chief Financial Officer Grant or award +8,124 58,450
2026-01-12 Stokes Frank Chief Financial Officer Grant or award · Performance-Based Stock Unit +8,124 8,124
2026-01-12 MAETZOLD DEREK J Pres. & Chief Exec. Officer Grant or award +62,219 91,732
2026-01-12 MAETZOLD DEREK J Pres. & Chief Exec. Officer Grant or award · Performance-Based Stock Unit +62,219 62,219
2026-01-06 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −1,339 $40.10 $54K 29,513
2026-01-05 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,678 $38.09 $102K 30,852
2025-12-22 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −830 $40.35 $33K 33,530
2025-12-17 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −509 $40.04 $20K 34,360
2025-12-17 Oelschlager Kristen M Chief Operating Officer Sale −14,888 $39.31 $585K 12,323
2025-12-16 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −12,821 $38.55 $494K 34,869
2025-12-15 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −18,513 $38.75 $717K 48,702
2025-12-15 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −1,012 $39.30 $40K 47,690
2025-12-11 Juvenal Tobin W Chief Commercial Officer Sale −13,200 $37.48 $495K 86,825

Page 16 of 45 · 897 trades