Caine Paul sold $199K of MGNI

Caine Paul sold 7,500 shares of MAGNITE, INC. (MGNI) at $26.50 ($0.20M total) on 2026-09-17 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Caine Paul
Published Sep 18, 2026, 8:06 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 18, 2026, 8:22 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
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

The disclosed sale is modest and unlikely to move the stock significantly, but it provides transparency for investors monitoring insider activity.

02

Market read

Primary insider sale filing; low immediate trading relevance but useful for monitoring insider trends.

03

What to watch

Potential upcoming corporate actions or earnings that prompted the pre‑arranged plan.

Relevance 3/10Novelty 4/10Timing: filing date 2026-09-18

Background

Form 4 filings disclose insider trades; directors often use 10b5‑1 plans to execute predetermined sales.

Company-level read

Ticker impact

$MGNINeutralMedium confidence
Context

Director Caine Paul sold 7,500 shares for $198,750 via a 10b5-1 plan, reducing his stake to 137,401 shares.

Expected impact

Potential slight downward pressure, but likely muted due to small size relative to float.

Evidence & confidence

The sale amount is modest for a mid-cap company and disclosed via a Form 4, which is a primary source but not material enough to drive significant trading activity.

Market effects

No broader sector impact; insider transaction is company‑specific.

None

None

Counterpoint

The sale could be interpreted as a lack of confidence, but given the pre‑arranged 10b5‑1 plan, it may not reflect sentiment.

Key entities

  • Caine Paul

    Director of Magnite, Inc. who sold shares under a 10b5‑1 plan.

  • Magnite, Inc.

    US‑listed ad‑tech company (ticker MGNI).

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

$MGNIMed

Magnite net income gains 70% to $34m as political ads near 3x forecast

Magnite reported Q3 2026 net income of $34.0M, up 70% YoY, with revenue rising 14% to $204.2M. CTV (streaming TV) grew 39% and accounted for 53% of total contribution. Political ads contributed significantly, but growth is expected to slow post-election. Adjusted EBITDA rose 46% to $83.4M, with margins improving to 42%.

$MGNIHighAI 8/10

Magnite (MGNI) Q3 2026 Earnings Call Transcript

Magnite (MGNI) reported strong Q3 2026 results, exceeding expectations with $201M in total contribution ex-TAC, 39% CTV growth, and 5% DV+ growth. Political ad spend surpassed forecasts at $12M, with full-year expectations raised to $40M. Adjusted EBITDA margin reached 42%. The company expects continued momentum, driven by CTV growth, partnerships, and political ad spend, with long-term CTV growth projected at 25% annually.

$APPHighAI 9/10

AppLovin Soars 30% on Record Quarter and Strong Outlook; Magnite Surges 17%, Trade Desk Falls 2%

AppLovin (APP) surged 30% after reporting Q3 2026 revenue of $2.18B, beating estimates, and raising its share repurchase authorization to $3.6B. The company guided Q4 revenue above consensus, citing strong growth in its ad business. Magnite (MGNI) rose 17% on strong results, while The Trade Desk (TTD) fell 2% on weak Q2 performance. Unity (U) gained 10% after reporting its first GAAP profitable quarter.