Senior insider sale
Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC — senior position signals high conviction
$5.52M
175.30K shares
MAETZOLD DEREK J plans to sell 175.30K shares of CASTLE BIOSCIENCES INC valued at approximately $5.52M. 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 a gift
None
Acquired as a gift
None
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
5/10/2018 | Acquired as compensation -- Stock Options Compensation -- Cashless exercise / same-day sale | 17.16K | — |
10/29/2007 | Acquired as a gift None | 6.40K | Gift |
10/29/2007 | Acquired as a gift None | 5.44K | Gift |
| Total | 28.99K | ||
Completed
Units to sell
1.60K
Market value
$56.5K
Units to sell
4.29K
Market value
$151.6K
Units to sell
1.60K
Market value
$56.5K
Units to sell
4.29K
Market value
$151.6K
Units to sell
1.36K
Market value
$48.0K
Units to sell
1.36K
Market value
$48.0K
Units to sell
1.36K
Market value
$43.6K
Units to sell
1.60K
Market value
$51.3K
Units to sell
4.29K
Market value
$137.4K
Units to sell
1.36K
Market value
$43.7K
Units to sell
1.60K
Market value
$51.4K
Units to sell
4.29K
Market value
$137.4K
Units to sell
624.00
Market value
$20.6K
Units to sell
156.00
Market value
$5.1K
Units to sell
599.00
Market value
$19.8K
Units to sell
3.41K
Market value
$112.6K
Units to sell
122.00
Market value
$4.0K
Units to sell
121.00
Market value
$4.0K
Units to sell
692.00
Market value
$22.8K
Units to sell
193.00
Market value
$6.4K
Units to sell
3.17K
Market value
$104.6K
Units to sell
156.00
Market value
$5.1K
Units to sell
85.00
Market value
$2.8K
Units to sell
529.00
Market value
$17.5K
Units to sell
122.00
Market value
$4.0K
Units to sell
554.00
Market value
$18.3K
Units to sell
665.00
Market value
$21.9K
Units to sell
681.00
Market value
$22.5K
Units to sell
676.00
Market value
$22.3K
Units to sell
3.04K
Market value
$100.5K
Units to sell
2.80K
Market value
$92.4K
Units to sell
157.00
Market value
$5.2K
Units to sell
353.00
Market value
$10.6K
Units to sell
740.00
Market value
$22.3K
Units to sell
59.00
Market value
$1.8K
Units to sell
408.00
Market value
$12.2K
Units to sell
204.00
Market value
$6.1K
Units to sell
142.00
Market value
$4.3K
Units to sell
370.00
Market value
$11.1K
Units to sell
413.00
Market value
$12.5K
Units to sell
484.00
Market value
$14.6K
Units to sell
301.00
Market value
$9.0K
Units to sell
873.00
Market value
$26.3K
Units to sell
197.00
Market value
$5.9K
Units to sell
987.00
Market value
$29.5K
Units to sell
74.00
Market value
$2.2K
Units to sell
74.00
Market value
$2.2K
Units to sell
219.00
Market value
$6.6K
Units to sell
204.00
Market value
$6.1K
Units to sell
204.00
Market value
$6.1K
Units to sell
852.00
Market value
$25.5K
Units to sell
74.00
Market value
$2.2K
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
6.93K
Market value
$215.1K
Units to sell
20.36K
Market value
$632.0K
Units to sell
8.16K
Market value
$253.2K
Units to sell
4.23K
Market value
$128.2K
Units to sell
10.66K
Market value
$323.0K
Units to sell
3.60K
Market value
$109.0K
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
6.21K
Market value
$149.8K
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
278.00
Market value
$6.7K
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
550.00
Market value
$12.6K
Units to sell
1.36K
Market value
$31.0K
Units to sell
278.00
Market value
$6.4K
Units to sell
1.15K
Market value
$26.4K
Units to sell
6.21K
Market value
$150.5K
Units to sell
278.00
Market value
$6.7K
Units to sell
1.15K
Market value
$27.9K
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
$6.7K
Units to sell
1.36K
Market value
$32.9K
Planned — Approximate Date
Units to sell
28.99K
Market value
$1.06M
Units
175.30K
Value
$5.52M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
9/21/2026 | 1.60K | $56.5K | — | Completed |
9/21/2026 | 4.29K | $151.6K | — | Completed |
9/21/2026 | 1.60K | $56.5K | — | Completed |
9/21/2026 | 4.29K | $151.6K | — | Completed |
9/21/2026 | 1.36K | $48.0K | — | Completed |
9/21/2026 | 1.36K | $48.0K | — | Completed |
9/11/2026 | 1.36K | $43.6K | — | Completed |
9/11/2026 | 1.60K | $51.3K | — | Completed |
9/11/2026 | 4.29K | $137.4K | — | Completed |
9/11/2026 | 1.36K | $43.7K | — | Completed |
9/11/2026 | 1.60K | $51.4K | — | Completed |
9/11/2026 | 4.29K | $137.4K | — | Completed |
8/28/2026 | 624.00 | $20.6K | — | Completed |
8/28/2026 | 156.00 | $5.1K | — | Completed |
8/28/2026 | 599.00 | $19.8K | — | Completed |
8/28/2026 | 3.41K | $112.6K | — | Completed |
8/28/2026 | 122.00 | $4.0K | — | Completed |
8/28/2026 | 121.00 | $4.0K | — | Completed |
8/28/2026 | 692.00 | $22.8K | — | Completed |
8/28/2026 | 193.00 | $6.4K | — | Completed |
8/28/2026 | 3.17K | $104.6K | — | Completed |
8/28/2026 | 156.00 | $5.1K | — | Completed |
8/28/2026 | 85.00 | $2.8K | — | Completed |
8/28/2026 | 529.00 | $17.5K | — | Completed |
8/28/2026 | 122.00 | $4.0K | — | Completed |
8/28/2026 | 554.00 | $18.3K | — | Completed |
8/28/2026 | 665.00 | $21.9K | — | Completed |
8/28/2026 | 681.00 | $22.5K | — | Completed |
8/28/2026 | 676.00 | $22.3K | — | Completed |
8/28/2026 | 3.04K | $100.5K | — | Completed |
8/28/2026 | 2.80K | $92.4K | — | Completed |
8/28/2026 | 157.00 | $5.2K | — | Completed |
8/14/2026 | 353.00 | $10.6K | — | Completed |
8/14/2026 | 740.00 | $22.3K | — | Completed |
8/14/2026 | 59.00 | $1.8K | — | Completed |
8/14/2026 | 408.00 | $12.2K | — | Completed |
8/14/2026 | 204.00 | $6.1K | — | Completed |
8/14/2026 | 142.00 | $4.3K | — | Completed |
8/14/2026 | 370.00 | $11.1K | — | Completed |
8/14/2026 | 413.00 | $12.5K | — | Completed |
8/14/2026 | 484.00 | $14.6K | — | Completed |
8/14/2026 | 301.00 | $9.0K | — | Completed |
8/14/2026 | 873.00 | $26.3K | — | Completed |
8/14/2026 | 197.00 | $5.9K | — | Completed |
8/14/2026 | 987.00 | $29.5K | — | Completed |
8/14/2026 | 74.00 | $2.2K | — | Completed |
8/14/2026 | 74.00 | $2.2K | — | Completed |
8/14/2026 | 219.00 | $6.6K | — | Completed |
8/14/2026 | 204.00 | $6.1K | — | Completed |
8/14/2026 | 204.00 | $6.1K | — | Completed |
8/14/2026 | 852.00 | $25.5K | — | Completed |
8/14/2026 | 74.00 | $2.2K | — | 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 | 6.93K | $215.1K | — | Completed |
8/4/2026 | 20.36K | $632.0K | — | Completed |
8/4/2026 | 8.16K | $253.2K | — | Completed |
8/3/2026 | 4.23K | $128.2K | — | Completed |
8/3/2026 | 10.66K | $323.0K | — | Completed |
8/3/2026 | 3.60K | $109.0K | — | 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 | 6.21K | $149.8K | — | 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 | 278.00 | $6.7K | — | 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 | 550.00 | $12.6K | — | Completed |
7/14/2026 | 1.36K | $31.0K | — | Completed |
7/14/2026 | 278.00 | $6.4K | — | Completed |
7/14/2026 | 1.15K | $26.4K | — | Completed |
7/1/2026 | 6.21K | $150.5K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 1.15K | $27.9K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 278.00 | $6.7K | — | Completed |
7/1/2026 | 1.36K | $32.9K | — | Completed |
| Planned — Approximate Date | ||||
10/5/2026 | 28.99K | $1.06M | NASD | Planned |
| Total | 175.30K | $5.52M | ||