Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed Jul 16, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$96K
Net Open-Market Flow
-$96K
Transactions
9
8 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jul 14, 2026Option exercise(M)550$2.39$1K22K
Jul 14, 2026Sell(S)550$22.92$13K21K
Jul 14, 2026Sell(S)1K$22.92$31K39K
Jul 14, 2026Sell(S)1K$22.92$26K33K
Jul 14, 2026Sell(S)278$22.92$6K12K
Jul 14, 2026Sell(S)278$22.92$6K12K
Jul 14, 2026Sell(S)278$22.92$6K12K
Jul 14, 2026Sell(S)278$22.92$6K12K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jul 14, 2026Option exercise(M)550—$085K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-048461) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML