Sign in

CIK 0001447362 · Accelerated filer

CASTLE BIOSCIENCES INC

Sign in to watch
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
2026-08-28 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −21 $33.88 $711 11,256
2026-08-28 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −12,428 25,329
2026-08-25 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −9,050 $35.04 $317K 66,914
2026-08-25 Oelschlager Kristen M Chief Operating Officer Sale −7,161 $34.26 $245K 77,872
2026-08-25 Oelschlager Kristen M Chief Operating Officer Sale −5,223 $34.64 $181K 72,649
2026-08-24 Oelschlager Kristen M Chief Operating Officer Sale −12,218 $33.69 $412K 85,033
2026-08-17 Juvenal Tobin W Chief Commercial Officer Sale 10b5-1 −1,730 $29.59 $51K 75,964
2026-08-14 Stokes Frank Chief Financial Officer Sale −24,908 $29.77 $742K 35,177
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +1,100 $2.39 $3K 22,579
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −1,100 $30.02 $33K 21,479
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,714 $30.02 $81K 20,355
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,306 $30.02 $69K 17,301
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $30.02 $8K 11,534
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $30.02 $8K 11,534
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $30.02 $8K 11,534
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −278 $30.02 $8K 11,534
2026-08-14 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise · Stock option (right to buy) 10b5-1 −1,100 37,757
2026-08-05 MAETZOLD DEREK J Pres. & Chief Exec. Officer Option exercise 10b5-1 +2,546 $2.39 $6K 24,025
2026-08-05 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −2,546 $30.68 $78K 21,479
2026-08-05 MAETZOLD DEREK J Pres. & Chief Exec. Officer Sale 10b5-1 −556 $30.68 $17K 23,069

Page 4 of 45 · 897 trades