Senior insider sale
Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC — senior position signals high conviction
$3.78M
135.48K shares
MAETZOLD DEREK J plans to sell 135.48K shares of CASTLE BIOSCIENCES INC valued at approximately $3.78M. 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 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 |
|---|---|---|---|
5/10/2018 | Acquired as compensation -- Stock Options Compensation -- Cashless exercise / same-day sale | 13.53K | — |
10/29/2007 | Acquired as gift None | 5.43K | 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 | 4.61K | Gift |
10/29/2007 | Acquired as gift None | 556.00 | Gift |
| Total | 25.79K | ||
Completed
Units to sell
556.00
Market value
$17.0K
Units to sell
473.00
Market value
$14.5K
Units to sell
2.55K
Market value
$78.0K
Units to sell
20.36K
Market value
$632.0K
Units to sell
8.16K
Market value
$253.2K
Units to sell
6.93K
Market value
$215.1K
Units to sell
10.66K
Market value
$323.0K
Units to sell
3.60K
Market value
$109.0K
Units to sell
4.23K
Market value
$128.2K
Units to sell
1.69K
Market value
$50.9K
Units to sell
1.98K
Market value
$59.7K
Units to sell
6.48K
Market value
$195.0K
Units to sell
278.00
Market value
$6.7K
Units to sell
1.36K
Market value
$32.7K
Units to sell
278.00
Market value
$6.7K
Units to sell
278.00
Market value
$6.7K
Units to sell
6.21K
Market value
$149.8K
Units to sell
278.00
Market value
$6.7K
Units to sell
1.15K
Market value
$27.8K
Units to sell
278.00
Market value
$6.4K
Units to sell
278.00
Market value
$6.4K
Units to sell
278.00
Market value
$6.4K
Units to sell
1.36K
Market value
$31.0K
Units to sell
278.00
Market value
$6.4K
Units to sell
550.00
Market value
$12.6K
Units to sell
1.15K
Market value
$26.4K
Units to sell
278.00
Market value
$6.7K
Units to sell
1.15K
Market value
$27.9K
Units to sell
1.36K
Market value
$32.9K
Units to sell
278.00
Market value
$6.7K
Units to sell
6.21K
Market value
$150.5K
Units to sell
278.00
Market value
$6.7K
Units to sell
278.00
Market value
$6.7K
Units to sell
278.00
Market value
$5.7K
Units to sell
278.00
Market value
$5.7K
Units to sell
278.00
Market value
$5.7K
Units to sell
278.00
Market value
$5.7K
Units to sell
550.00
Market value
$11.3K
Units to sell
1.15K
Market value
$23.7K
Units to sell
1.36K
Market value
$28.0K
Units to sell
278.00
Market value
$5.8K
Units to sell
1.36K
Market value
$28.2K
Units to sell
278.00
Market value
$5.8K
Units to sell
1.15K
Market value
$24.0K
Units to sell
278.00
Market value
$5.8K
Units to sell
6.21K
Market value
$129.2K
Units to sell
278.00
Market value
$5.8K
Units to sell
212.00
Market value
$4.3K
Units to sell
212.00
Market value
$4.3K
Units to sell
880.00
Market value
$17.7K
Units to sell
212.00
Market value
$4.3K
Units to sell
420.00
Market value
$8.5K
Units to sell
212.00
Market value
$4.3K
Units to sell
1.03K
Market value
$20.8K
Units to sell
322.00
Market value
$6.4K
Units to sell
66.00
Market value
$1.3K
Units to sell
130.00
Market value
$2.6K
Units to sell
66.00
Market value
$1.3K
Units to sell
66.00
Market value
$1.3K
Units to sell
273.00
Market value
$5.4K
Units to sell
66.00
Market value
$1.3K
Planned — Approximate Date
Units to sell
25.79K
Market value
$764.0K
Units
135.48K
Value
$3.78M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
8/5/2026 | 556.00 | $17.0K | — | Completed |
8/5/2026 | 473.00 | $14.5K | — | Completed |
8/5/2026 | 2.55K | $78.0K | — | Completed |
8/4/2026 | 20.36K | $632.0K | — | Completed |
8/4/2026 | 8.16K | $253.2K | — | Completed |
8/4/2026 | 6.93K | $215.1K | — | Completed |
8/3/2026 | 10.66K | $323.0K | — | Completed |
8/3/2026 | 3.60K | $109.0K | — | Completed |
8/3/2026 | 4.23K | $128.2K | — | Completed |
7/31/2026 | 1.69K | $50.9K | — | Completed |
7/31/2026 | 1.98K | $59.7K | — | Completed |
7/31/2026 | 6.48K | $195.0K | — | Completed |
7/27/2026 | 278.00 | $6.7K | — | Completed |
7/27/2026 | 1.36K | $32.7K | — | Completed |
7/27/2026 | 278.00 | $6.7K | — | Completed |
7/27/2026 | 278.00 | $6.7K | — | Completed |
7/27/2026 | 6.21K | $149.8K | — | Completed |
7/27/2026 | 278.00 | $6.7K | — | Completed |
7/27/2026 | 1.15K | $27.8K | — | Completed |
7/14/2026 | 278.00 | $6.4K | — | Completed |
7/14/2026 | 278.00 | $6.4K | — | Completed |
7/14/2026 | 278.00 | $6.4K | — | Completed |
7/14/2026 | 1.36K | $31.0K | — | Completed |
7/14/2026 | 278.00 | $6.4K | — | Completed |
7/14/2026 | 550.00 | $12.6K | — | Completed |
7/14/2026 | 1.15K | $26.4K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 1.15K | $27.9K | — | Completed |
7/1/2026 | 1.36K | $32.9K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 6.21K | $150.5K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
6/15/2026 | 278.00 | $5.7K | — | Completed |
6/15/2026 | 278.00 | $5.7K | — | Completed |
6/15/2026 | 278.00 | $5.7K | — | Completed |
6/15/2026 | 278.00 | $5.7K | — | Completed |
6/15/2026 | 550.00 | $11.3K | — | Completed |
6/15/2026 | 1.15K | $23.7K | — | Completed |
6/15/2026 | 1.36K | $28.0K | — | Completed |
6/1/2026 | 278.00 | $5.8K | — | Completed |
6/1/2026 | 1.36K | $28.2K | — | Completed |
6/1/2026 | 278.00 | $5.8K | — | Completed |
6/1/2026 | 1.15K | $24.0K | — | Completed |
6/1/2026 | 278.00 | $5.8K | — | Completed |
6/1/2026 | 6.21K | $129.2K | — | Completed |
6/1/2026 | 278.00 | $5.8K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 880.00 | $17.7K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 420.00 | $8.5K | — | Completed |
5/21/2026 | 212.00 | $4.3K | — | Completed |
5/21/2026 | 1.03K | $20.8K | — | Completed |
5/20/2026 | 322.00 | $6.4K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 130.00 | $2.6K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
5/20/2026 | 273.00 | $5.4K | — | Completed |
5/20/2026 | 66.00 | $1.3K | — | Completed |
| Planned — Approximate Date | ||||
8/14/2026 | 25.79K | $764.0K | NASD | Planned |
| Total | 135.48K | $3.78M | ||