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SEC EDGARAUG 191 min read$CSTL

Juvenal Tobin W sold $51K of CSTL

Juvenal Tobin W (Chief Commercial Officer) sold 1,730 shares of CASTLE BIOSCIENCES INC (CSTL) at $29.59 on 2026-08-17 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Juvenal Tobin W
Published Aug 19, 2026, 8:11 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 19, 2026, 8:17 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
About AlphAI AI DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$CSTL
Neutral
high confidence
Mentioned
$CSTL
Relevance
2/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$CSTLNeutralLow
01

Why it matters

The disclosed sale is small and pre‑arranged, suggesting minimal immediate market reaction.

02

Market read

Limited relevance; typical for small insider sales.

03

Timing

post-market 2026-08-17

Relevance 2/10Novelty 4/10Timing: post-market 2026-08-17

Background

The filing is a routine insider transaction by the Chief Commercial Officer of Castle Biosciences, reported via SEC Form 4.

Company-level read

Ticker impact

$CSTLNeutralHigh confidence
Context

Form 4 disclosed Juvenal Tobin W sold 1,730 shares for $51,190, reducing his stake to 75,964 shares.

Expected impact

No material move expected.

Evidence & confidence

Sale size is small relative to float and disclosed via 10b5-1 plan.

Key entities

  • company
    Castle Biosciences Inc.

    Biotech firm listed on NASDAQ under ticker CSTL.

  • person
    Juvenal Tobin W

    Chief Commercial Officer and insider seller.

Read at source← All news

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

CSTL insider trading history →

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