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SEC EDGARSEP 111 min read$MGNI

Evans Katie Seitz sold $336K of MGNI

Evans Katie Seitz (See Remarks) sold 13,997 shares of MAGNITE, INC. (MGNI) at $24.00 ($0.34M total) on 2026-09-11 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Evans Katie Seitz
Published Sep 11, 2026, 8:19 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 11, 2026, 8:25 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
$MGNI
Neutral
high confidence
Mentioned
$MGNI
Relevance
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

The transaction is modest and pre‑arranged, offering little new trading insight.

02

Market read

Low relevance; typical insider sale with minimal market effect.

03

What to watch

Potential future sales under the 10b5‑1 plan could accumulate.

Relevance 3/10Novelty 4/10Timing: same day filing

Background

Form 4 filing discloses an insider's open‑market sale of Magnite shares.

Company-level read

Ticker impact

$MGNINeutralHigh confidence
Context

Officer Evans Katie Seitz sold 13,997 shares for $335,928 via a 10b5‑1 plan on 2026‑09‑11.

Expected impact

No significant impact expected.

Evidence & confidence

The sale size (~$0.34M) is small relative to market cap and was pre‑arranged.

Market effects

Sector

None; insider sale does not affect sector dynamics.

Regional

None; company is US‑listed with limited regional relevance.

Global

None; isolated insider transaction.

Counterpoint

What could challenge this read

Even small insider sales can signal lack of confidence, but size is negligible.

Key entities

  • Officer
    Evans Katie Seitz

    Insider who sold shares.

  • Company
    Magnite, Inc.

    Digital advertising platform provider (ticker MGNI).

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.

MGNI insider trading history →

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