Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed Apr 23, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$105K
Net Open-Market Flow
-$105K
Transactions
9
8 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Apr 21, 2026Option exercise(M)550$2.39$1K22K
Apr 21, 2026Sell(S)550$25.10$14K21K
Apr 21, 2026Sell(S)1K$25.10$34K47K
Apr 21, 2026Sell(S)1K$25.10$29K40K
Apr 21, 2026Sell(S)278$25.10$7K3K
Apr 21, 2026Sell(S)278$25.10$7K3K
Apr 21, 2026Sell(S)278$25.10$7K3K
Apr 21, 2026Sell(S)278$25.10$7K3K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Apr 21, 2026Option exercise(M)550—$07K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-026851) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML