DEREK J MAETZOLD
CIK 1239501 · Pres. & Chief Exec. Officer · last filed 2026-06-03
DEREK J MAETZOLD is a Pres. & Chief Exec. Officer who has filed 189 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for CSTL, was dated Jun 3, 2026. Across all open-market trades the lifetime net is −$91.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.3M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$1.34M
2
189
-$91.13M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CSTL | Pres. & Chief Exec. Officer | 64,601 | $20.70 | $1.34M | -$91.13M | 185 | 2026-06-03 |
| ENCYSIVE PHARMACEUTICALS INC (ENCY) Delisted | V.P., Marketing & Sales | 0 | — | — | $0 | 4 | 2008-04-03 |
Recent Filings
189 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-03 | CSTL | Mixed | −3,622 | -$190.3K | EDGAR |
| 2026-05-22 | CSTL | Mixed | −3,622 | -$82.8K | EDGAR |
| 2026-05-11 | CSTL | Mixed | −3,622 | -$203.1K | EDGAR |
| 2026-04-23 | CSTL | Mixed | −3,622 | -$103.4K | EDGAR |
| 2026-04-08 | CSTL | Mixed | −3,622 | -$231.3K | EDGAR |
| 2026-03-30 | CSTL | Mixed | −3,622 | -$105.3K | EDGAR |
| 2026-03-19 | CSTL | Sell (S) | −19,300 | -$500.1K | EDGAR |
| 2026-03-17 | CSTL | Sell (S) | −30,779 | -$792.4K | EDGAR |
| 2026-03-13 | CSTL | Mixed | −37,899 | -$1.12M | EDGAR |
| 2026-03-05 | CSTL | Mixed | +22,123 | -$1.03M | EDGAR |