MAETZOLD DEREK J
Pres. & Chief Exec. Officer
MAETZOLD DEREK J has filed 37 SEC Form 4 filings (197 transaction rows) across 1 company, with disclosures dating back to 2025. 36 of those filings fall inside the rolling window. Most recent filing: Sep 15, 2026.
On the most recent filing, MAETZOLD DEREK J is listed as Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC. Inside the rolling window, MAETZOLD DEREK J reported no open-market purchases and 43 open-market sales totaling $10.0M in CSTL. The largest disclosed transaction in the window is a sale of 35,441 CSTL shares on Aug 4, 2026, worth $1.1M.
Companies traded
Other insiders at CSTL
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$10.0M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| CSTL | Pres. & Chief Exec. Officer | Sale | 14,518 | $465K | Sep 15 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 17,726 | $588K | Sep 1 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 6,398 | $192K | Aug 18 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 35,441 | $1.1M | Aug 6 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,575 | $110K | Aug 6 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 10,153 | $306K | Aug 4 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 18,493 | $561K | Aug 4 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 9,002 | $218K | Jul 29 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,338 | $77K | Jul 16 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 9,002 | $219K | Jul 6 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,338 | $69K | Jun 17 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 9,002 | $188K | Jun 3 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 791 | $16K | May 22 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 2,547 | $51K | May 22 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 9,002 | $199K | May 11 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,338 | $84K | Apr 23 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 9,002 | $225K | Apr 8 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,338 | $85K | Mar 30 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 18,650 | $484K | Mar 19 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 650 | $17K | Mar 19 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 13,204 | $336K | Mar 17 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 17,575 | $456K | Mar 17 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 20,388 | $532K | Mar 13 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 23,179 | $586K | Mar 13 | SEC ↗ | |
| CSTL | Pres. & Chief Exec. Officer | Sale | 3,200 | $128K | Feb 5 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Sep 2, 2025 | CSTL | Sale | $32K |
Frequently asked questions
How many SEC Form 4 filings has MAETZOLD DEREK J made?
MAETZOLD DEREK J has filed 37 SEC Form 4 filings (197 transaction rows) across 1 company since 2025.
Which companies does MAETZOLD DEREK J trade?
MAETZOLD DEREK J has filed SEC Form 4 disclosures for 1 company, including CSTL.
When was MAETZOLD DEREK J's most recent SEC Form 4 filing?
MAETZOLD DEREK J's most recent SEC Form 4 filing on Tracefour is dated Sep 15, 2026.
What is MAETZOLD DEREK J's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, MAETZOLD DEREK J is listed as Pres. & Chief Exec. Officer.
What is MAETZOLD DEREK J's total buy and sell value in the current window?
Inside the rolling retention window, MAETZOLD DEREK J bought $0 and sold $10.0M based on SEC Form 4 filings.
What was MAETZOLD DEREK J's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 35,441 CSTL shares on 2026-08-04, worth $1.1M, per SEC Form 4 filings.