BARRETT MICHAEL G. sold $6.7M of MGNI

BARRETT MICHAEL G. (CEO) sold 293,968 shares of MAGNITE, INC. (MGNI) at $22.72 ($6.68M total) on 2026-08-06 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · BARRETT MICHAEL G.
Published Aug 7, 2026, 9:00 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 7, 2026, 10:43 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
medium confidence
Mentioned
$MGNI
Relevance
5/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

Insider selling can influence short-term sentiment, but 10b5-1 plans are designed to reduce timing-based inference. Traders typically treat this as low fundamental impact unless paired with other disclosures.

02

Market read

MGNI receives a fresh insider-sale datapoint, but the 10b5-1 structure limits interpretive value for fundamentals.

03

What to watch

The filing does not state motivations, tax planning, or whether other insiders are buying; without additional context, the market may overreact to the headline size.

Relevance 5/10Novelty 3/10Timing: filed 2026-08-07 after-hours; sale executed 2026-08-06

Background

The article is a SEC Form 4 insider transaction disclosure for Magnite, Inc. (MGNI) by its CEO and director.

Company-level read

Ticker impact

$MGNINeutralMedium confidence
Context

Magnite CEO Michael G. Barrett sold 293,968 shares in an open-market transaction at $22.72 on 2026-08-06 under a 10b5-1 plan.

Expected impact

Low likelihood of a sustained price move; any reaction is likely short-lived unless accompanied by other company-specific news.

Evidence & confidence

Form 4 shows a pre-arranged 10b5-1 sale and provides no new operational, financial, or regulatory information. The disclosed size is notable but still typically interpreted as routine insider liquidity when tied to 10b5-1.

Market effects

No clear sector read-through; this is company-specific insider liquidity rather than a sector catalyst.

None indicated.

None indicated.

Counterpoint

Because the sale is explicitly under a pre-arranged 10b5-1 plan, the signal quality is low and any negative interpretation may be overdone.

Key entities

  • MAGNITE, INC.

    US-listed company whose CEO filed a Form 4 for an open-market sale under a 10b5-1 plan.

  • BARRETT MICHAEL G.

    CEO and director who sold 293,968 shares at $22.72 per share.

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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