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SEC EDGAR$CSTL

Oelschlager Kristen M sold $139K of CSTL

Oelschlager Kristen M (Chief Operating Officer) sold 4,152 shares of CASTLE BIOSCIENCES INC (CSTL) at an average of $33.39 ($33.36–$34.02, $0.14M total) across 2 trades on 2026-09-01 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Oelschlager Kristen M
Published Sep 3, 2026, 8:07 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 3, 2026, 10:17 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.
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AlphAI market briefInsider activity
Primary signal
$CSTL
Neutral
high confidence
Mentioned
$CSTL
Relevance
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$CSTLNeutralLow
01

Why it matters

The disclosed sale is modest and unlikely to affect valuation; serves as routine compliance disclosure.

02

Market read

Minor insider transaction; limited trading relevance.

03

What to watch

Potential upcoming clinical data releases could affect stock more than this sale.

Relevance 3/10Novelty 4/10Timing: transaction dated Sep 1, filing Sep 3

Background

Form 4 filing from Castle Biosciences Inc. (CSTL) reporting a 10b5‑1 sale by its COO.

Company-level read

Ticker impact

$CSTLNeutralHigh confidence
Context

COO Kristen Oelschlager sold 4,152 shares for $138,642.72 on Sep 1, 2026 via a 10b5‑1 plan.

Expected impact

No significant impact; may cause slight short‑term pressure.

Evidence & confidence

Sale size is small relative to float and disclosed via a routine Form 4; market typically discounts such modest disposals.

Market effects

Sector

No broader sector impact; biotech sector unchanged.

Regional

US market only; negligible regional effect.

Global

None

Counterpoint

What could challenge this read

If insider confidence is low, could signal upcoming weakness, but evidence is weak.

Key entities

  • Company
    Castle Biosciences Inc.

    US‑listed biotech firm (ticker CSTL).

  • Executive
    Kristen M. Oelschlager

    Chief Operating Officer of Castle Biosciences.

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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