SEC Form 4 Reporting Owner · CIK 0001239501

Derek J Maetzold

Officer at Castle Biosciences Inc

Bought (12 mo) —
Sold (12 mo) −$12.1M
Form 4 Filings 172
Companies 1
Filing Activity 2026-11-04 first filed 2021-01-15

Trading record

Open-market buys — 0 filings
Open-market sales −$77.9M 161 filings
Sales under a 10b5-1 plan 99% 159 of 161 sale filings · 1 undisclosed

Companies

CompanyRoleFilingsBoughtSoldNetHolding after latest filing
CSTLCastle Biosciences Insider tradingOfficer172—1,763,989−1,763,989155,942 2026-11-04

Common-stock shares bought and sold on the open market, as reported on Form 4. The holding is what the latest filing at each company reported owning after its transactions.

Insider Trading History

Most recent 50 of 172 filings
Company Type Value Filed
CSTL Castle Biosciences Inc Sell -$523,330 2026-11-04
CSTL Castle Biosciences Inc Sell -$462,567 2026-10-21
CSTL Castle Biosciences Inc Sell -$515,565 2026-10-07
CSTL Castle Biosciences Inc Sell -$512,202 2026-09-23
CSTL Castle Biosciences Inc Sell -$464,870 2026-09-15
CSTL Castle Biosciences Inc Sell -$616,134 2026-09-01
CSTL Castle Biosciences Inc Sell -$217,105 2026-08-18
CSTL Castle Biosciences Inc Sell -$1,212,230 2026-08-06
CSTL Castle Biosciences Inc Sell -$867,451 2026-08-04
CSTL Castle Biosciences Inc Sell -$237,682 2026-07-29
CSTL Castle Biosciences Inc Sell -$95,622 2026-07-16
CSTL Castle Biosciences Inc Sell -$238,916 2026-07-06
CSTL Castle Biosciences Inc Sell -$86,194 2026-06-17
CSTL Castle Biosciences Inc Sell -$205,149 2026-06-03
CSTL Castle Biosciences Inc Sell -$84,066 2026-05-22
CSTL Castle Biosciences Inc Sell -$217,904 2026-05-11
CSTL Castle Biosciences Inc Sell -$104,709 2026-04-23
CSTL Castle Biosciences Inc Sell -$246,195 2026-04-08
CSTL Castle Biosciences Inc Sell -$106,599 2026-03-30
CSTL Castle Biosciences Inc Sell -$500,098 2026-03-19
CSTL Castle Biosciences Inc Sell -$792,410 2026-03-17
CSTL Castle Biosciences Inc Sell -$1,132,821 2026-03-13
CSTL Castle Biosciences Inc Exercise — 2026-03-05
CSTL Castle Biosciences Inc Sell -$158,757 2026-02-05
CSTL Castle Biosciences Inc Sell -$160,732 2026-01-22
CSTL Castle Biosciences Inc Award — 2026-01-14
CSTL Castle Biosciences Inc Sell -$155,694 2026-01-07
CSTL Castle Biosciences Inc Sell -$33,491 2025-12-29
CSTL Castle Biosciences Inc Sell -$20,380 2025-12-19
CSTL Castle Biosciences Inc Sell -$1,251,400 2025-12-17
CSTL Castle Biosciences Inc Exercise — 2025-12-11
CSTL Castle Biosciences Inc Sell -$53,600 2025-12-08
CSTL Castle Biosciences Inc Sell -$105,057 2025-12-04
CSTL Castle Biosciences Inc Sell -$170,703 2025-12-01
CSTL Castle Biosciences Inc Sell -$204,851 2025-11-26
CSTL Castle Biosciences Inc Sell -$91,106 2025-11-20
CSTL Castle Biosciences Inc Sell -$289,078 2025-11-06
CSTL Castle Biosciences Inc Sell -$30,047 2025-10-23
CSTL Castle Biosciences Inc Sell -$30,234 2025-10-06
CSTL Castle Biosciences Inc Sell -$29,419 2025-09-19
CSTL Castle Biosciences Inc Sell -$32,042 2025-09-04
CSTL Castle Biosciences Inc Sell -$26,833 2025-08-19
CSTL Castle Biosciences Inc Sell -$839,043 2025-08-15
CSTL Castle Biosciences Inc Exercise — 2025-08-12
CSTL Castle Biosciences Inc Sell -$458,293 2025-07-01
CSTL Castle Biosciences Inc Sell -$121,447 2025-04-23
CSTL Castle Biosciences Inc Sell -$113,931 2025-04-10
CSTL Castle Biosciences Inc Sell -$114,573 2025-03-28
CSTL Castle Biosciences Inc Sell -$585,673 2025-03-11
CSTL Castle Biosciences Inc Sell -$118,619 2025-03-06