$MGNI

Gephart Brian sold $308K of MGNI

Gephart Brian (CHIEF ACCOUNTING OFFICER) sold 12,479 shares of MAGNITE, INC. (MGNI) at $24.68 ($0.31M total) on 2026-08-10.

Original reporting
SEC EDGAR · Gephart Brian
Published Aug 12, 2026, 8:54 PM UTC
Analysis
alphai AI DeskAI-generated
Added to alphai Aug 12, 2026, 11:01 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
low confidence
Mentioned
$MGNI
Relevance
4/10
alphai data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MGNINeutralLow
01

Why it matters

The newest disclosed fact is the specific open-market sale size, price, and post-transaction holdings by the chief accounting officer.

02

Market read

Traders may note insider selling activity, but there is no accompanying operational or financial update in the text.

03

What to watch

The filing does not state a 10b5-1 plan, but insider sales without additional context still have weak signal-to-noise for trading decisions.

Relevance 4/10Novelty 3/10Timing: filed 2026-08-12, sale executed 2026-08-10

Background

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

Company-level read

Ticker impact

$MGNINeutralLow confidence
Context

Magnite Form 4 shows CFO Gephart Brian sold 12,479 shares on 2026-08-10 at $24.6800, totaling $307,981.72.

Expected impact

Likely minimal near-term impact; any effect would be sentiment-only and typically fades.

Evidence & confidence

Form 4 insider sales are common and, absent accompanying guidance, litigation, or operational updates, usually have limited predictive value for price.

Market effects

No clear sector read-through from a single insider sale.

None indicated.

None indicated.

Counterpoint

The sale could be for diversification or personal liquidity needs and may not reflect a bearish view on Magnite’s prospects.

Key entities

  • MAGNITE, INC.

    Subject of the Form 4 insider transaction disclosure.

  • Gephart Brian

    Chief Accounting Officer who sold shares.

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

$MGNIMedAI 8/10

Magnite Sees CTV Growth Hit 36% as Sports and SMB Ad Demand Expands

Magnite (NASDAQ:MGNI) said CTV growth reached 36% as live sports and small-to-midsize business ad demand expands, with further opportunities in NFL, NCAA football and March Madness. The company raised its growth outlook to 13% to 14%, implying about 20% EBITDA growth and over 40% free-cash-flow growth, and lifted its adjusted EBITDA margin target to above 37%.

$MGNIHighAI 9/10

Why is Magnite stock surging today?

Magnite shares rose about 9.8% in pre-open after the company reported Q2 2026 results. Revenue was $192.8M vs $179.2M consensus, non-GAAP EPS $0.26 vs $0.25, and contribution ex-TAC up 17% to $189.6M. Adjusted EBITDA rose 30% to $71M. Magnite raised full-year 2026 guidance and analysts lifted price targets.

$MGNIHighAI 9/10

Magnite Q2 Earnings Call Highlights

Magnite (NASDAQ:MGNI) reported Q2 cash of $333 million, operating cash flow of $57 million and net leverage of 0.1x. The company repurchased or withheld 2.1 million shares for about $28 million in the quarter and raised Q3 guidance for total Contribution ex-TAC to $188 million to $192 million. Full-year Adjusted EBITDA margin is now at least 37%.

$MGNIHighAI 9/10

Magnite lifts 2026 growth guidance to 13-14% as CTV gains 36%

Magnite (NASDAQ: MGNI) reported Q2 revenue of $192.8M, up 11% y/y, and raised full-year targets. Connected TV contribution ex-TAC grew 36% y/y to $97.1M. Total contribution ex-TAC was $189.6M. Net income was $19.4M ($0.13 diluted EPS) and adjusted EBITDA was $70.6M. Results cover the quarter ended June 30, 2026.