MAETZOLD DEREK J sold CSTL
March 16, 2026 · Form 4 insider transaction
MAETZOLD DEREK J sold 126 shares of Castle Biosciences, Inc. at $26.68 per share, a transaction worth $3.4K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
Direction
Disposed (sell-side)
Shares
126
Price
$26.68
Total value
$3.4K
InsiderMAETZOLD DEREK J
Role—
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateMarch 16, 2026
Filing dateMarch 17, 2026
Shares owned after40,779
OwnershipDirect
10b5-1 planYes
AmendedNo
Footnotes
These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.