Buonasera David sold $179K of MGNI

Buonasera David (CHIEF TECHNOLOGY OFFICER) sold 7,649 shares of MAGNITE, INC. (MGNI) at an average of $23.46 ($22.81–$25.00, $0.18M total) across 3 trades on 2026-08-06 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Buonasera David
Published Aug 7, 2026, 9:09 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 7, 2026, 9:23 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
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

The disclosed open-market sale is pre-arranged under a Rule 10b5-1 plan, which generally makes it less informative about near-term company prospects.

02

Market read

Traders may note the insider sale for sentiment monitoring, but there is no new operational or financial catalyst in the text.

03

What to watch

The article does not disclose any concurrent buy transactions, changes in guidance, or operational developments, limiting the ability to connect the sale to new fundamentals.

Relevance 3/10Novelty 3/10Timing: filed Aug 7, covering Aug 6 sale trades

Background

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

Company-level read

Ticker impact

$MGNINeutralHigh confidence
Context

Magnite Form 4 shows CTO Buonasera David sold 7,649 shares in open-market trades totaling $179,477.56 under a 10b5-1 plan.

Expected impact

Low likelihood of sustained price impact; any effect is likely short-lived and sentiment-driven.

Evidence & confidence

The filing is an SEC Form 4 insider transaction and explicitly states a pre-arranged 10b5-1 plan, which typically reduces interpretive weight versus discretionary selling.

Market effects

No clear sector read-through from a single 10b5-1 sale by a CTO.

None indicated.

None indicated.

Counterpoint

Even with 10b5-1, repeated insider sales can coincide with valuation or liquidity needs, so traders may still watch for follow-on selling patterns.

Key entities

  • MAGNITE, INC.

    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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