$REGN

Guarini Kathryn sold $340K of REGN

Guarini Kathryn sold 400 shares of REGENERON PHARMACEUTICALS, INC. (REGN) at $850.00 ($0.34M total) on 2026-09-02 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Guarini Kathryn
Published Sep 3, 2026, 8:47 PM UTC
Analysis
alphai AI DeskAI-generated
Added to alphai Sep 3, 2026, 11:21 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.
alphai market briefInsider activity
Primary signal
$REGN
Neutral
medium confidence
Mentioned
$REGN
Relevance
3/10
alphai data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$REGNNeutralLow
01

Why it matters

The disclosed sale is a primary source event but modest in scale, offering limited trading edge.

02

Market read

Provides a fresh insider sale data point; limited impact on price expectations.

03

What to watch

Potential upcoming FDA decisions or trial results could outweigh the insider sale signal.

Relevance 3/10Novelty 4/10Timing: post‑market 2026‑09‑02

Background

SEC Form 4 filing discloses insider transactions; used by traders to gauge insider sentiment.

Company-level read

Ticker impact

$REGNNeutralMedium confidence
Context

Director Kathryn Guarini sold 400 shares of Regeneron at $850 each, total $340K, via a 10b5‑1 plan.

Expected impact

Potential short‑term dip of 0.5‑1% if market reacts.

Evidence & confidence

A $340K sale by a director is a routine liquidity move; not large enough to drive major price action.

Market effects

Minimal impact on biotech sector; typical insider sales are common.

No regional effect; confined to Regeneron shareholders.

Negligible on global markets.

Counterpoint

If the director is cashing out ahead of upcoming negative news, the sale could foreshadow a drop.

Key entities

  • Regeneron Pharmaceuticals, Inc.

    Biotech firm developing therapeutics; ticker REGN.

  • Kathryn Guarini

    Director of Regeneron, executed a 10b5‑1 sale.

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.

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