Senior insider sale
Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC — senior position signals high conviction
$3.47M
140.40K shares
MAETZOLD DEREK J plans to sell 140.40K shares of CASTLE BIOSCIENCES INC valued at approximately $3.47M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.
Acquired as compensation -- Stock Options
Compensation -- Cashless exercise / same-day sale
Acquired as compensation -- Stock Options
Compensation -- Cashless exercise / same-day sale
Acquired as gift
None
Acquired as gift
None
Acquired as gift
None
Acquired as gift
None
Acquired as gift
None
Acquired as gift
None
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
11/12/2018 | Acquired as compensation -- Stock Options Compensation -- Cashless exercise / same-day sale | 204.00 | — |
5/10/2018 | Acquired as compensation -- Stock Options Compensation -- Cashless exercise / same-day sale | 6.56K | — |
10/29/2007 | Acquired as gift None | 2.31K | Gift |
10/29/2007 | Acquired as gift None | 556.00 | Gift |
10/29/2007 | Acquired as gift None | 556.00 | Gift |
10/29/2007 | Acquired as gift None | 556.00 | Gift |
10/29/2007 | Acquired as gift None | 556.00 | Gift |
10/29/2007 | Acquired as gift None | 2.71K | Gift |
| Total | 14.01K | ||
Completed
Units to sell
212.00
Market value
$4.3K
Units to sell
212.00
Market value
$4.3K
Units to sell
1.03K
Market value
$20.8K
Units to sell
212.00
Market value
$4.3K
Units to sell
880.00
Market value
$17.7K
Units to sell
420.00
Market value
$8.5K
Units to sell
212.00
Market value
$4.3K
Units to sell
66.00
Market value
$1.3K
Units to sell
66.00
Market value
$1.3K
Units to sell
66.00
Market value
$1.3K
Units to sell
322.00
Market value
$6.4K
Units to sell
130.00
Market value
$2.6K
Units to sell
66.00
Market value
$1.3K
Units to sell
273.00
Market value
$5.4K
Units to sell
278.00
Market value
$6.1K
Units to sell
1.36K
Market value
$30.0K
Units to sell
278.00
Market value
$6.1K
Units to sell
1.15K
Market value
$25.5K
Units to sell
6.21K
Market value
$137.3K
Units to sell
278.00
Market value
$6.1K
Units to sell
278.00
Market value
$6.1K
Units to sell
278.00
Market value
$7.0K
Units to sell
278.00
Market value
$7.0K
Units to sell
1.36K
Market value
$34.0K
Units to sell
1.15K
Market value
$28.9K
Units to sell
278.00
Market value
$7.0K
Units to sell
278.00
Market value
$7.0K
Units to sell
550.00
Market value
$13.8K
Units to sell
278.00
Market value
$6.9K
Units to sell
278.00
Market value
$6.9K
Units to sell
278.00
Market value
$6.9K
Units to sell
1.15K
Market value
$28.8K
Units to sell
6.21K
Market value
$155.2K
Units to sell
1.36K
Market value
$33.9K
Units to sell
278.00
Market value
$6.9K
Units to sell
278.00
Market value
$7.1K
Units to sell
550.00
Market value
$14.0K
Units to sell
1.15K
Market value
$29.4K
Units to sell
278.00
Market value
$7.1K
Units to sell
278.00
Market value
$7.1K
Units to sell
278.00
Market value
$7.1K
Units to sell
1.36K
Market value
$34.6K
Units to sell
650.00
Market value
$16.5K
Units to sell
18.65K
Market value
$482.4K
Units to sell
17.57K
Market value
$455.4K
Units to sell
13.20K
Market value
$335.2K
Units to sell
23.18K
Market value
$584.5K
Units to sell
621.00
Market value
$16.3K
Units to sell
5.68K
Market value
$147.0K
Units to sell
166.00
Market value
$4.3K
Units to sell
736.00
Market value
$19.3K
Units to sell
116.00
Market value
$3.0K
Units to sell
163.00
Market value
$4.3K
Units to sell
113.00
Market value
$3.0K
Units to sell
662.00
Market value
$17.3K
Units to sell
498.00
Market value
$13.1K
Units to sell
163.00
Market value
$4.3K
Units to sell
83.00
Market value
$2.2K
Units to sell
2.64K
Market value
$69.3K
Units to sell
199.00
Market value
$5.2K
Units to sell
116.00
Market value
$3.0K
Units to sell
5.41K
Market value
$140.1K
Units to sell
3.59K
Market value
$93.9K
Planned — Approximate Date
Units to sell
14.01K
Market value
$293.7K
Units
140.40K
Value
$3.47M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 1.03K | $20.8K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 880.00 | $17.7K | — | Completed |
5/21/2026 | 420.00 | $8.5K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 322.00 | $6.4K | — | Completed |
5/20/2026 | 130.00 | $2.6K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 273.00 | $5.4K | — | Completed |
5/7/2026 | 278.00 | $6.1K | — | Completed |
5/7/2026 | 1.36K | $30.0K | — | Completed |
5/7/2026 | 278.00 | $6.1K | — | Completed |
5/7/2026 | 1.15K | $25.5K | — | Completed |
5/7/2026 | 6.21K | $137.3K | — | Completed |
5/7/2026 | 278.00 | $6.1K | — | Completed |
5/7/2026 | 278.00 | $6.1K | — | Completed |
4/21/2026 | 278.00 | $7.0K | — | Completed |
4/21/2026 | 278.00 | $7.0K | — | Completed |
4/21/2026 | 1.36K | $34.0K | — | Completed |
4/21/2026 | 1.15K | $28.9K | — | Completed |
4/21/2026 | 278.00 | $7.0K | — | Completed |
4/21/2026 | 278.00 | $7.0K | — | Completed |
4/21/2026 | 550.00 | $13.8K | — | Completed |
4/6/2026 | 278.00 | $6.9K | — | Completed |
4/6/2026 | 278.00 | $6.9K | — | Completed |
4/6/2026 | 278.00 | $6.9K | — | Completed |
4/6/2026 | 1.15K | $28.8K | — | Completed |
4/6/2026 | 6.21K | $155.2K | — | Completed |
4/6/2026 | 1.36K | $33.9K | — | Completed |
4/6/2026 | 278.00 | $6.9K | — | Completed |
3/26/2026 | 278.00 | $7.1K | — | Completed |
3/26/2026 | 550.00 | $14.0K | — | Completed |
3/26/2026 | 1.15K | $29.4K | — | Completed |
3/26/2026 | 278.00 | $7.1K | — | Completed |
3/26/2026 | 278.00 | $7.1K | — | Completed |
3/26/2026 | 278.00 | $7.1K | — | Completed |
3/26/2026 | 1.36K | $34.6K | — | Completed |
3/18/2026 | 650.00 | $16.5K | — | Completed |
3/17/2026 | 18.65K | $482.4K | — | Completed |
3/16/2026 | 17.57K | $455.4K | — | Completed |
3/13/2026 | 13.20K | $335.2K | — | Completed |
3/12/2026 | 23.18K | $584.5K | — | Completed |
3/11/2026 | 621.00 | $16.3K | — | Completed |
3/11/2026 | 5.68K | $147.0K | — | Completed |
3/11/2026 | 166.00 | $4.3K | — | Completed |
3/11/2026 | 736.00 | $19.3K | — | Completed |
3/11/2026 | 116.00 | $3.0K | — | Completed |
3/11/2026 | 163.00 | $4.3K | — | Completed |
3/11/2026 | 113.00 | $3.0K | — | Completed |
3/11/2026 | 662.00 | $17.3K | — | Completed |
3/11/2026 | 498.00 | $13.1K | — | Completed |
3/11/2026 | 163.00 | $4.3K | — | Completed |
3/11/2026 | 83.00 | $2.2K | — | Completed |
3/11/2026 | 2.64K | $69.3K | — | Completed |
3/11/2026 | 199.00 | $5.2K | — | Completed |
3/11/2026 | 116.00 | $3.0K | — | Completed |
3/11/2026 | 5.41K | $140.1K | — | Completed |
3/11/2026 | 3.59K | $93.9K | — | Completed |
| Planned — Approximate Date | ||||
6/1/2026 | 14.01K | $293.7K | NASD | Planned |
| Total | 140.40K | $3.47M | ||