| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Across the last three months, Castle Biosciences, Inc.'s insiders have reduced their positions by a net 265,876 shares worth roughly $8.5M. In the past 30 days, 0 insiders bought and 3 sold. Sales set the recent tone.
On the other side, 3 insiders reduced their position over the period. CSTL sits in the Life Sciences Tools & Services industry within the Health Care sector, so this activity is best read against the sector's broader insider trend.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| Other | 48.7K | $1.64M | -9,865 | |
| CFO | 35.2K | $1.05M | - | |
| COO | 13.4K | $485.9K | -4,153 | |
| Dir | 11.8K | - | - | |
| Dir | 11.8K | - | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 19, 2026 | Maetzold Derek J69 | Pres. &Chief Exec. Officer | Sell | 14,496 | $31.91 | $462,567.36 | -40.3% | - | - | |
| Oct 12, 2026 | Juvenal Tobin W71 | Chief Commercial Officer | Sell | 3,288 | $33.64 | $110,608.32 | -6.3% | - | - | |
| Oct 5, 2026 | Maetzold Derek J69 | Pres. &Chief Exec. Officer | Sale+OE | 14,496 | $35.57 | $515,564.74 | -68.0% | - | - | |
| Oct 1, 2026 | Oelschlager Kristen M72 | Chief Operating Officer | Sale+OE | 4,153 | $35.95 | $149,317.73 | -23.7% | - | - | |
| Sep 30, 2026 | Juvenal Tobin W71 | Chief Commercial Officer | Sell | 6,577 | $35.29 | $232,128.21 | -11.2% | - | - | |
| Sep 21, 2026 | Maetzold Derek J69 | Pres. &Chief Exec. Officer | Sale+OE | 14,496 | $35.33 | $512,201.66 | -60.3% | - | - | |
| Sep 15, 2026 | Juvenal Tobin W71 | Chief Commercial Officer | Sell | 6,600 | $33.73 | $222,620.89 | -10.1% | - | - | |
| Sep 11, 2026 | Maetzold Derek J69 | Pres. &Chief Exec. Officer | Sale+OE | 14,518 | $32.02 | $464,870.06 | -54.2% | - | - | |
| Sep 1, 2026 | Oelschlager Kristen M72 | Chief Operating Officer | Sale+OE | 4,152 | $33.39 | $138,642.72 | -23.7% | - | - | |
| Aug 31, 2026 | Juvenal Tobin W71 | Chief Commercial Officer | Sell | 1,730 | $32.81 | $56,761.30 | -2.6% | - | - |