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Castle Biosciences (CSTL): Director exercised options on 8,165 units

Derek J Maetzold, Director at Castle Biosciences, reported an option exercise of 8,165 units.

8,165
Derivative units
Traded
Oct 5, 2026
Filed
Oct 8, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

  1. Aug 25, 2026Federal contract · $164K obligatedDepartment of Veterans Affairs awarded CASTLE BIOSCIENCES INC: $164K obligated to date
  2. Sep 21, 2026Insider · 1 personInsiders: 3 sales (~$512K)
  3. Sep 29, 2026InsiderOfficer sold ~$197K of CSTL shares in the open market
  4. Sep 30, 2026InsiderOfficer sold ~$35K of CSTL shares in the open market
  5. Oct 1, 2026Insider · 1 personInsiders: 2 sales (~$149K)
  6. Oct 5, 2026Insider · 1 personInsiders: 3 sales (~$516K)

What came next

  1. Oct 12, 2026InsiderOfficer sold ~$111K of CSTL shares in the open market
  2. Oct 19, 2026Insider · 1 personInsiders: 3 sales (~$463K)
  3. Oct 26, 2026InsiderOfficer sold ~$109K of CSTL shares in the open market
  4. Oct 28, 2026Insider · 1 personInsiders: 2 sales (~$240K)
  5. Oct 29, 20265% stakePRINCIPAL GLOBAL INVESTORS reported a passive stake (13G) of 4.9%
  6. Nov 2, 2026Insider · 1 personInsiders: 6 sales (~$523K)
  7. Nov 5, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
  8. Nov 9, 2026InsiderOfficer sold ~$107K of CSTL shares in the open market
  9. Nov 11, 2026Insider · 1 personInsiders: 2 sales (~$211K)
View the official recordSEC Form 4

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Castle Biosciences

For Castle Biosciences, OQRO holds 31 insider filings (SEC Form 4 or Form 144), 1 fund holdings report (13F) and 1 federal contract award dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its CSTL page.

Other recent filings by Derek J Maetzold, Pres. & Chief Exec. Officer

The full history of Derek J Maetzold, Pres. & Chief Exec. Officer is on the profile page.

How this filing works

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Other disclosures at Castle Biosciences

Everything OQRO holds on this company is on its CSTL page.

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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