Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed Jun 3, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$205K
Net Open-Market Flow
-$205K
Transactions
11
9 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jun 1, 2026Option exercise(M)204$2.39$48822K
Jun 1, 2026Option exercise(M)6K$2.39$14K28K
Jun 1, 2026Sell(S)6K$20.86$130K21K
Jun 1, 2026Sell(S)1K$20.86$28K43K
Jun 1, 2026Sell(S)1K$20.86$24K37K
Jun 1, 2026Sell(S)278$20.86$6K2K
Jun 1, 2026Sell(S)278$20.86$6K2K
Jun 1, 2026Sell(S)278$20.86$6K2K
Jun 1, 2026Sell(S)278$20.86$6K2K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jun 1, 2026Option exercise(M)204—$00
Jun 1, 2026Option exercise(M)6K—$092K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-040260) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML