Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed Jul 29, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$238K
Net Open-Market Flow
-$238K
Transactions
16
15 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jul 27, 2026Option exercise(M)6K$2.39$15K28K
Jul 27, 2026Sell(S)6K$24.13$144K22K
Jul 27, 2026Sell(S)1K$24.13$32K38K
Jul 27, 2026Sell(S)1K$24.13$27K32K
Jul 27, 2026Sell(S)268$24.13$6K12K
Jul 27, 2026Sell(S)268$24.13$6K12K
Jul 27, 2026Sell(S)268$24.13$6K12K
Jul 27, 2026Sell(S)268$24.13$6K12K
Jul 27, 2026Sell(S)232$25.06$6K21K
Jul 27, 2026Sell(S)50$25.06$1K38K
Jul 27, 2026Sell(S)43$25.06$1K32K
Jul 27, 2026Sell(S)10$25.06$25112K
Jul 27, 2026Sell(S)10$25.06$25112K
Jul 27, 2026Sell(S)10$25.06$25112K
Jul 27, 2026Sell(S)10$25.06$25112K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jul 27, 2026Option exercise(M)6K—$079K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-050616) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML

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