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.
How this was made
The 30-second read
Why it matters
The newest disclosed fact is the specific open-market sale size, price, and post-transaction holdings by the chief accounting officer.
Market read
Traders may note insider selling activity, but there is no accompanying operational or financial update in the text.
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.
Background
The article is an SEC Form 4 insider transaction disclosure for Magnite, Inc.
Ticker impact
Magnite Form 4 shows CFO Gephart Brian sold 12,479 shares on 2026-08-10 at $24.6800, totaling $307,981.72.
Likely minimal near-term impact; any effect would be sentiment-only and typically fades.
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
- issuerMAGNITE, INC.
Subject of the Form 4 insider transaction disclosure.
- insiderGephart Brian
Chief Accounting Officer who sold shares.

