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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
2026-10-01 Oelschlager Kristen M Chief Operating Officer Option exercise 10b5-1 +4,153 $3.38 $14K 17,509
2026-10-01 Oelschlager Kristen M Chief Operating Officer Sale 10b5-1 −2,807 $35.75 $100K 14,702
2026-10-01 Oelschlager Kristen M Chief Operating Officer Sale 10b5-1 −1,346 $36.38 $49K 13,356
2026-10-01 Oelschlager Kristen M Chief Operating Officer Option exercise · Stock option (right to buy) 10b5-1 −4,153 8,305
2026-09-30 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −1,034 $34.20 $35K 52,007
2026-09-29 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −5,543 $35.50 $197K 53,041
2026-09-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +8,580 $2.39 $21K 30,059
2026-09-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −8,580 $35.33 $303K 21,479
2026-09-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −3,198 $35.33 $113K 11,236
2026-09-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,718 $35.33 $96K 9,550
2026-09-21 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −8,580 8,165
2026-09-15 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −3,294 $35.14 $116K 58,584
2026-09-14 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −3,306 $32.32 $107K 61,878
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +8,584 $2.39 $21K 30,063
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −8,361 $32.00 $268K 21,702
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −3,124 $32.00 $100K 14,517
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,656 $32.00 $85K 12,339
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −223 $32.78 $7K 21,479
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −83 $32.78 $3K 14,434
2026-09-11 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −71 $32.78 $2K 12,268

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