Buonasera David sold $26K of MGNI

Buonasera David (CHIEF TECHNOLOGY OFFICER) sold 1,224 shares of MAGNITE, INC. (MGNI) at $21.00 on 2026-07-07 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Buonasera David
Published Jul 9, 2026, 8:32 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Jul 9, 2026, 8:37 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
$MGNI
Neutral
high confidence
Mentioned
$MGNI
Relevance
2/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

Because the sale is explicitly under a pre-arranged 10b5-1 plan, it is typically treated as lower-signal than discretionary selling and usually does not change the fundamental outlook by itself.

02

Market read

Traders may note insider selling optics, but the filing does not introduce new company-specific catalysts.

03

What to watch

The article provides only the sale details; it does not include any concurrent buys, option exercises, or changes in broader insider activity trends.

Relevance 2/10Novelty 2/10Timing: latest Form 4 filed 2026-07-09, covering a sale dated 2026-07-07

Background

The article is an SEC Form 4 insider transaction for Magnite, Inc. (MGNI) by its Chief Technology Officer.

Company-level read

Ticker impact

$MGNINeutralHigh confidence
Context

Magnite CTO Buonasera David sold 1,224 shares on 2026-07-07 at $21.00/share under a 10b5-1 plan, per Form 4.

Expected impact

Likely minimal price impact; any effect is more about sentiment than new company information.

Evidence & confidence

The filing discloses an insider transaction size and price but no new operational, financial, or regulatory development for Magnite.

Market effects

No sector read-across; this is company-specific insider trading disclosure.

None indicated.

None indicated.

Counterpoint

Insider sales can be driven by diversification or tax planning and may not reflect bearish expectations, especially with a 10b5-1 plan.

Key entities

  • MAGNITE, INC.

    Public company subject of the Form 4 insider transaction disclosure.

  • Buonasera David

    Chief Technology Officer who sold shares under a 10b5-1 plan.

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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