MAETZOLD DEREK J sold CSTL
September 11, 2026 · Form 4 insider transaction
MAETZOLD DEREK J sold 71 shares of Castle Biosciences, Inc. at $32.78 per share, a transaction worth $2.3K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 4 days after the transaction.
Direction
Disposed (sell-side)
Shares
71
Price
$32.78
Total value
$2.3K
InsiderMAETZOLD DEREK J
Role—
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateSeptember 11, 2026
Filing dateSeptember 15, 2026
Shares owned after12,268
OwnershipIndirect
10b5-1 planYes
AmendedNo
Footnotes
These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on June 2, 2026.; Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.