Who
Derek J. Maetzold
Pres. & Chief Exec. Officer
Company insider
Files Form 4 as: Pres. & Chief Exec. Officer, Castle Biosciences; V.P., Marketing & Sales, Encysive Pharmaceuticals.
In numbers
- Trades disclosed
- 1,943
- Buys
- 0
- Sells
- 269
- Bought
- $0
- Sold
- $105.1M
- Companies
- 2
- Companies where not an officer
- 0
- First trade
- 2 Mar 2006
- Last trade
- 19 Oct 2026
- Last filed
- 21 Oct 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 19 Oct 2026filed 21 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $274K8,580 at $31.91 | filing |
| 19 Oct 2026filed 21 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $102K3,198 at $31.91 | filing |
| 19 Oct 2026filed 21 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $87K2,718 at $31.91 | filing |
| 5 Oct 2026filed 7 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Code M | $20K8,165 at $2.39 | filing |
| 5 Oct 2026filed 7 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $305K8,580 at $35.57 | filing |
| 5 Oct 2026filed 7 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $114K3,198 at $35.57 | filing |
| 5 Oct 2026filed 7 Oct 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $97K2,718 at $35.57 | filing |
| 5 Oct 2026filed 7 Oct 2026 | CSTL Castle Biosciencesoption or derivative · Diagnostics & Labs | SEC FORM 4 Code M | —8,165 at $0.00 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Code M | $21K8,580 at $2.39 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $303K8,580 at $35.33 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $113K3,198 at $35.33 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle Biosciencesoption or derivative · Diagnostics & Labs | SEC FORM 4 Code M | —8,580 at $0.00 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $96K2,718 at $35.33 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle Biosciencesoption or derivative · Diagnostics & Labs | SEC FORM 4 Code M | —8,580 at $0.00 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Code M | $21K8,580 at $2.39 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $303K8,580 at $35.33 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $113K3,198 at $35.33 | filing |
| 21 Sep 2026filed 23 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $96K2,718 at $35.33 | filing |
| 11 Sep 2026filed 15 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Code M | $21K8,584 at $2.39 | filing |
| 11 Sep 2026filed 15 Sep 2026 | CSTL Castle BiosciencesDiagnostics & Labs | SEC FORM 4 Sold | $268K8,361 at $32.00 | filing |
The newest 500 lines are listed; the numbers count every line.
News
Head to Head Analysis: Castle Biosciences (NASDAQ:CSTL) vs. Alignment Healthcare (NASDAQ:ALHC)CSTL · themarketsdaily.com · 15 Oct 2026Castle Biosciences (NASDAQ:CSTL) Insider Tobin Juvenal Sells 3,288 Shares of StockCSTL · themarketsdaily.com · 14 Oct 2026
0 headlines in the last 90 days name Derek J. Maetzold; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.