Arkolith/Insider Trading/CSTL/Form 4

Maetzold Derek J

Pres. & Chief Exec. Officer, DirectorCASTLE BIOSCIENCES INC (CSTL) · full profile →Form 4 · filed May 11, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$218K
Net Open-Market Flow
-$218K
Transactions
16
15 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 7, 2026Option exercise(M)6K$2.39$15K28K
May 7, 2026Sell(S)5K$22.08$117K22K
May 7, 2026Sell(S)1K$22.08$26K46K
May 7, 2026Sell(S)985$22.08$22K39K
May 7, 2026Sell(S)237$22.08$5K2K
May 7, 2026Sell(S)237$22.08$5K2K
May 7, 2026Sell(S)237$22.08$5K2K
May 7, 2026Sell(S)237$22.08$5K2K
May 7, 2026Sell(S)906$22.59$20K21K
May 7, 2026Sell(S)198$22.59$4K46K
May 7, 2026Sell(S)168$22.59$4K39K
May 7, 2026Sell(S)41$22.59$9262K
May 7, 2026Sell(S)41$22.59$9262K
May 7, 2026Sell(S)41$22.59$9262K
May 7, 2026Sell(S)41$22.59$9262K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 7, 2026Option exercise(M)6K—$0754

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-033446) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML