C

SEC EDGAR - Form 4 insider activity

Castle Biosciences Inc $CSTL

Tracked equity - 3 filings indexed by Nortis

Nortis signal thesis

Cluster activity detected. Review whether the filings are open-market trades or routine compensation events.

0

OM buys - 90d

1

OM sells - 90d

2

Routine filings

3

Cluster filings

$196.8K

Largest trade

34/100

Avg signal score

Filing tape

Recent filings

Last 30d: 3
Option ExerciseCLUSTERRoutine 15/100
filed 2026-10-07
MJBoard

MAETZOLD DEREK J - Director, Pres. & Chief Exec. Officer - $19.5K

Option exercises are often compensation mechanics rather than a direct market view; what happens to the shares next matters more. It is part of a cluster (3+ insiders within 7 days), which is generally more notable than an isolated filing.

View source filing
Option ExerciseCLUSTERRoutine 15/100
filed 2026-10-05
OMOfficer

Oelschlager Kristen M - Chief Operating Officer - $14.0K

Option exercises are often compensation mechanics rather than a direct market view; what happens to the shares next matters more. It is part of a cluster (3+ insiders within 7 days), which is generally more notable than an isolated filing.

View source filing
Open-market SellCLUSTERHigh signal 71/100
filed 2026-10-01
JWOfficer

Juvenal Tobin W - Chief Commercial Officer - $196.8K

Insiders sell for many reasons (diversification, tax, personal); size and clustering matter more than a single sale. It is part of a cluster (3+ insiders within 7 days), which is generally more notable than an isolated filing.

View source filing