InsiderPres. & Chief Exec. Officer

Derek J Maetzold Insider Trading Activity

Every SEC Form 4 transaction reported by Derek J Maetzold, sourced directly from SEC EDGAR and updated as new filings are accepted.

By · Insider-trading data from SEC EDGAR
Latest filing:

Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.

Quick Answer

Is Derek J Maetzold buying or selling?

Derek J Maetzold reported 0 open-market buys ($0) and 181 sells ($96.2M) across 181 Form 4 filings at 1 company — a net selling position of $96.2M.

Source: SEC EDGAR Form 4

What stands out

  • All 181 of Derek J Maetzold's Form 4 filings are for one company, CASTLE BIOSCIENCES INC (CSTL).
  • The most recent Form 4 was accepted on Oct 7, 2026 (11 days ago).
  • In the last 12 months: no open-market purchases and 33 sales ($11.2M).
  • The largest open-market sale in the last 12 months was $1.3M of CASTLE BIOSCIENCES INC (CSTL) on Dec 17, 2025. SEC ↗

Key Statistics (as of Oct 7, 2026)

Total Form 4 filings
181
SEC EDGAR
Companies
1
Buys (0)
$0
Sells (181)
$96.2M

Insider sentiment

Net selling

Net insider flow of $96.2M in net selling, filed between May 18, 2020 – Oct 7, 2026.

Companies Derek J Maetzold files for

#CompanyForm 4 filings
1CSTLCASTLE BIOSCIENCES INC181

Recent Derek J Maetzold transactions

DateTickerRoleTypeSharesValueFiling
Oct 7, 2026CSTLPres. & Chief Exec. OfficerSale14.5K$515.6KSEC ↗
Sep 23, 2026CSTLPres. & Chief Exec. OfficerSale14.5K$512.2KSEC ↗
Sep 15, 2026CSTLPres. & Chief Exec. OfficerSale14.5K$464.9KSEC ↗
Sep 1, 2026CSTLPres. & Chief Exec. OfficerSale18.6K$616.1KSEC ↗
Aug 18, 2026CSTLPres. & Chief Exec. OfficerSale7.2K$217.1KSEC ↗
Aug 6, 2026CSTLPres. & Chief Exec. OfficerSale39.0K$1.2MSEC ↗
Aug 4, 2026CSTLPres. & Chief Exec. OfficerSale28.6K$867.5KSEC ↗
Jul 29, 2026CSTLPres. & Chief Exec. OfficerSale9.8K$237.7KSEC ↗
Jul 16, 2026CSTLPres. & Chief Exec. OfficerSale4.2K$95.6KSEC ↗
Jul 6, 2026CSTLPres. & Chief Exec. OfficerSale9.8K$238.9KSEC ↗
Jun 17, 2026CSTLPres. & Chief Exec. OfficerSale4.2K$86.2KSEC ↗
Jun 3, 2026CSTLPres. & Chief Exec. OfficerSale9.8K$205.1KSEC ↗
May 22, 2026CSTLPres. & Chief Exec. OfficerSale4.2K$84.1KSEC ↗
May 11, 2026CSTLPres. & Chief Exec. OfficerSale9.8K$217.9KSEC ↗
Apr 23, 2026CSTLPres. & Chief Exec. OfficerSale4.2K$104.7KSEC ↗
Apr 8, 2026CSTLPres. & Chief Exec. OfficerSale9.8K$246.2KSEC ↗
Mar 30, 2026CSTLPres. & Chief Exec. OfficerSale4.2K$106.6KSEC ↗
Mar 19, 2026CSTLPres. & Chief Exec. OfficerSale19.3K$500.1KSEC ↗
Mar 17, 2026CSTLPres. & Chief Exec. OfficerSale30.8K$792.4KSEC ↗
Mar 13, 2026CSTLPres. & Chief Exec. OfficerSale44.1K$1.1MSEC ↗
Feb 5, 2026CSTLPres. & Chief Exec. OfficerSale4.0K$158.8KSEC ↗
Jan 22, 2026CSTLPres. & Chief Exec. OfficerSale4.0K$160.7KSEC ↗
Jan 7, 2026CSTLPres. & Chief Exec. OfficerSale4.0K$155.7KSEC ↗
Dec 29, 2025CSTLPres. & Chief Exec. OfficerSale830$33.5KSEC ↗
Dec 19, 2025CSTLPres. & Chief Exec. OfficerSale509$20.4KSEC ↗

Showing the 25 most recent filings of 181. Screen every filing.

Derek J Maetzold insider trading FAQ

Is Derek J Maetzold buying or selling?

Across 181 SEC Form 4 filings, Derek J Maetzold reported 0 open-market purchases totaling $0 and 181 sales totaling $96.2M — a net selling position of $96.2M.

Which companies does Derek J Maetzold file Form 4s for?

Derek J Maetzold has reported insider transactions at 1 company, most often CASTLE BIOSCIENCES INC (CSTL).

How far back does Derek J Maetzold's filing history go?

Trabud holds Derek J Maetzold's SEC Form 4 filings from May 18, 2020 – Oct 7, 2026, sourced directly from SEC EDGAR.

Where does Trabud get Derek J Maetzold's insider trading data?

Directly from SEC EDGAR Form 4 filings. Every transaction on this page is a real filing accepted by the SEC, updated as new filings arrive.

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