Caine Paul sold $188K of MGNI

Caine Paul sold 7,500 shares of MAGNITE, INC. (MGNI) at $25.00 ($0.19M total) on 2026-08-14 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Caine Paul
Published Aug 18, 2026, 8:16 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 18, 2026, 8:47 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 newest fact is the specific sale size, price, and that it was executed under a pre-arranged 10b5-1 plan.

02

Market read

Traders may note the insider sale, but the 10b5-1 structure makes it less actionable than discretionary selling.

03

What to watch

The filing does not disclose motives beyond the plan; without follow-on buys or changes in guidance, the signal is likely weak.

Relevance 3/10Novelty 3/10Timing: Filed on 2026-08-18 after-hours; reflects sale executed 2026-08-14.

Background

The article is an SEC Form 4 insider transaction disclosure for Magnite, Inc.

Company-level read

Ticker impact

$MGNINeutralHigh confidence
Context

Magnite director Caine Paul filed a Form 4 open-market sale of 7,500 shares at $25.00 on 2026-08-14.

Expected impact

Low likelihood of a sustained price move solely from this filing.

Evidence & confidence

The transaction is explicitly an open-market sale and pre-arranged under Rule 10b5-1, which typically reduces interpretive value versus discretionary selling.

Market effects

Minimal, as the disclosure is company-specific and not tied to sector-wide developments.

None indicated.

None indicated.

Counterpoint

Even with 10b5-1, repeated insider selling can coincide with internal views on valuation or liquidity needs, so some traders may still fade short-term strength.

Key entities

  • MAGNITE, INC.

    Subject of the Form 4 insider transaction disclosure.

  • Caine Paul

    Director who sold 7,500 shares in an open-market transaction 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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