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CSTL Exercise Disclosure
Maetzold Derek J · SEC Form 4 · Filed Sep 23, 2026
Exercise
Calculated transaction value
$20.51K
Maetzold Derek J Pres. & Chief Exec. Officer
CSTL
Castle Biosciences
CSTL
Transaction date
Sep 21, 2026
Public filing date
Sep 23, 2026
Filing lag
Filed 2 days later
CSTL daily price context
Close on/before transaction
$34.99
Sep 21, 2026
First close after public filing
$35.19
Sep 24, 2026
30-day return after filing
-6.0%
Through Oct 23, 2026
Source details
- Reported owner
- Not disclosed
- Source asset code
- Security
- Security
- Common Stock
- Quantity / price
- 8,580 shares @ $2.39
- SEC ownership
- Direct
- Transaction code
- M
- Form
- 4
- Filing identifier
- 0001628280-26-063221
Filing cohort
Transactions in this filing
Showing 5 of 5
Trades
5
Issuers
1
Estimated value
$532.71K
Buys / sales
0 / 3
| Issuer | Transaction | Traded | Value |
|---|---|---|---|
| Castle Biosciences Inc CSTL | Sale | Sep 21, 2026 | $113K |
| Castle Biosciences Inc CSTL Current | Exercise | Sep 21, 2026 | $20.51K |
| Castle Biosciences Inc CSTL | Sale | Sep 21, 2026 | $303.17K |
| Castle Biosciences Inc CSTL | Sale | Sep 21, 2026 | $96.04K |
| Castle Biosciences Inc CSTL | Exercise | Sep 21, 2026 | $0 |