Derek J Maetzold Insider Trades & Stock Holdings
Derek J Maetzold, Pres. & Chief Exec. Officer at Castle Biosciences, Inc. has 6 Form 4 trades on file since Jul 1, 2026. Open-market activity: 0 purchases ($0) and 6 sales ($2.29M), net -$2.29M. Latest filing: disposed of 14.50K shares of $CSTL on Oct 19, 2026 at $31.91.
- Trades on file
- 6
- Open-market bought
- $0
- Open-market sold
- $2.29M
- Net open-market
- -$2.29M
- Shares held ($CSTL)
- 12.48K
- Latest filing
- Oct 19, 2026
Shares held by Derek J Maetzold
Shares owned after the most recent Form 4 for each company.
All insider trades by Derek J Maetzold
| Date | Ticker | Type | Shares | Price | Value | Owned after | ΔOwn | 1W | 1M | 6M | Role | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $CSTL | Sell (Open-market sale) 10b5-1 | 14.50K | $31.91 | $462.57K | 12.48K | -53.73% | Pres. & Chief Exec. Officer | SEC | Read | ||||
| $CSTL | Sell (Open-market sale) 10b5-1 | 14.50K | $35.57 | $515.56K | 21.06K | -40.76% | -10.6% | Pres. & Chief Exec. Officer | SEC | — | |||
| $CSTL | Sell (Open-market sale) 10b5-1 | 14.50K | $35.33 | $512.20K | 21.48K | -40.29% | +2.7% | -1.8% | Pres. & Chief Exec. Officer | SEC | — | ||
| $CSTL | Sell (Open-market sale) 10b5-1 | 14.52K | $32.02 | $464.87K | 21.48K | -40.33% | +9.3% | +1.3% | Pres. & Chief Exec. Officer | SEC | — | ||
| $CSTL | Sell (Open-market sale) 10b5-1 | 4.17K | $22.92 | $95.62K | 21.48K | -16.26% | +6.0% | +32.1% | Pres. & Chief Exec. Officer | SEC | — | ||
| $CSTL | Sell (Open-market sale) 10b5-1 | 9.84K | $24.29 | $238.92K | 21.48K | -31.41% | -4.3% | +13.3% | Pres. & Chief Exec. Officer | SEC | — |
"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.
Stocks Derek J Maetzold traded
Frequently asked questions
Has Derek J Maetzold been buying or selling stock?
Derek J Maetzold has 0 open-market purchases and 6 open-market sales on file, net -$2.29M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.
What was Derek J Maetzold's latest insider trade?
disposed of 14.50K shares of $CSTL on Oct 19, 2026 at $31.91.
Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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