Spillane Robert F sold $246K of MGNI

Spillane Robert F sold 10,363 shares of MAGNITE, INC. (MGNI) at $23.76 ($0.25M total) on 2026-09-14.

Original reporting
SEC EDGAR · Spillane Robert F
Published Sep 16, 2026, 8:20 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 16, 2026, 8:24 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
Bearish
medium confidence
Mentioned
$MGNI
Relevance
4/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNIBearishLow
01

Why it matters

The director's sale reduces his ownership, which could be interpreted as a lack of confidence, but the size is relatively small.

02

Market read

Insider sale news may cause short-term price movement; otherwise limited broader market impact.

03

What to watch

Potential upcoming corporate actions or compensation plans not disclosed.

Relevance 4/10Novelty 4/10Timing: filing today

Background

Form 4 filings disclose insider transactions; this is the first public report of this sale.

Company-level read

Ticker impact

$MGNIBearishMedium confidence
Context

Director Robert F. Spillane sold 10,363 shares for $246,224, reducing his stake to 57,715 shares.

Expected impact

Possible modest dip in MGNI price over the next few days.

Evidence & confidence

Insider sales by a director are watched by traders; the amount is modest but could influence sentiment.

Market effects

Minimal impact on the digital advertising sector.

No significant regional effect.

Limited to investors tracking insider activity.

Counterpoint

The sale may be routine portfolio rebalancing, not a negative signal.

Key entities

  • Magnite, Inc.

    US-listed digital advertising technology firm (ticker MGNI).

  • Robert F. Spillane

    Director of Magnite, Inc.

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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