Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Sep 21 executedSep 23, 2026 disclosed
CSTL · daily
Yahoo Finance chart API
◉This trade, on the day it was made▼Disclosure●Material company filing◯Other disclosed buy◯Other disclosed sellUnofficial public endpoint; daily OHLCV, split-adjusted. Replace with a licensed feed for production.
Option exercise — administrative, little informational value
Relative size+1 / 25
No reported dollar value · new position
Filing timing0 / 15
Disclosed 2 business days after execution (deadline: 2)
Historical behavior+4 / 15
4 prior trades recorded in this security
Frequency & clustering0 / 15
No clustered activity in the dataset
Market events0 / 10
No material company filing within 60 days after the trade
Pre-arranged plan-10
Executed under a Rule 10b5-1 trading plan
The Insider Score measures how far a disclosure deviates from normal filing patterns. A high score is a prompt for research, not evidence of illegal insider trading.
CASTLE BIOSCIENCES INC — Stock option (right to buy)
Ticker
CSTL
Shares
8,580
Price per share
$0
Execution date (reported)
Sep 21, 2026
Owned after transaction
8,165 shares
Rule 10b5-1 plan
Yes, as checked by the filer
Days from execution to publication
2
What this establishes
Maetzold Derek J filed this Form 4 reporting a option exercise of CSTL on Sep 21, 2026. It became public on Sep 23, 2026. The filing establishes the reported transaction and the filer's stated role. It does not establish why the trade was made or what the filer knew.
Extraction
Method
Form 4 XML
Confidence
1.00
Director, Pres. & Chief Exec. Officer
Maetzold Derek Jcik:0001239501
Issuer
CASTLE BIOSCIENCES INCcik:0001447362
Revision history · 0
No field has changed since this record was first ingested.
