Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed Jul 6, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$239K
Net Open-Market Flow
-$239K
Transactions
9
8 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jul 1, 2026Option exercise(M)6K$2.39$15K28K
Jul 1, 2026Sell(S)6K$24.29$151K21K
Jul 1, 2026Sell(S)1K$24.29$33K41K
Jul 1, 2026Sell(S)1K$24.29$28K35K
Jul 1, 2026Sell(S)278$24.29$7K12K
Jul 1, 2026Sell(S)278$24.29$7K12K
Jul 1, 2026Sell(S)278$24.29$7K12K
Jul 1, 2026Sell(S)278$24.29$7K12K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jul 1, 2026Option exercise(M)6K—$086K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-047287) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML