$MGNI

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.

Related articles

$APPMed

AppLovin Drops 5% as Edgewater Warns Market Share Growth Has Stalled; Magnite Slips, Trade Desk Slips 3%

AppLovin (APP) stock fell 5% after Edgewater Research warned of stalled market-share growth, projecting 8-9% Q4 revenue growth. Citi data shows APP's e-commerce clients grew 5% in one week. Competitors Magnite (MGNI) and The Trade Desk (TTD) also declined but face different pressures. APP's decline reflects growth and competition concerns, with legal overhang adding uncertainty.

$MGNIHigh

Why Magnite Stock Rocketed Higher Today

Magnite (MGNI) shares rose 7.2% after a judge unsealed the full ruling in the Google (GOOGL, GOOG) antitrust case, imposing remedies that may benefit adtech companies. Analysts raised price targets for Magnite, citing the ruling's positive impact. The stock is up over 100% in six months and trades at 23 times earnings.

$TTDMed

Trade Desk Rises 5% on Kokai Zuma Agentic AI Launch, AppLovin and Magnite Barely Budge

The Trade Desk (TTD) rose 5% to $14.25 after launching Kokai Zuma, an AI-driven advertising platform. Despite a 64% YTD decline, the stock gained on product news, while QQQ fell 0.2%. TTD trades at 11x forward earnings, below the industry average. AppLovin (APP) and Magnite (MGNI) showed minimal movement despite growth. TTD's Q2 revenue grew 3% YoY to $715M, with Q3 guidance at $650M+.

$MGNIMed

Magnite Sees CTV Surge and Google Antitrust Remedies as Growth Catalysts

Magnite reported a 36% year-over-year increase in CTV contribution ex-TAC, now representing 51% of its mix. The company benefits from partnerships with Netflix, Warner, Roku, and Disney, and sees growth in programmatic CTV buying. Magnite also highlighted its integrated ad-serving technology and share repurchase program. According to the company, its operating model generated 80% flow-through from incremental revenue to EBITDA in Q2, with a $10M top-line beat and $8M EBITDA beat.