Form 4: Magnite CTO Sells Shares Under Pre-Arranged 10b5-1 Plan

Magnite's Chief Technology Officer, David Buonasera, sold 2,950 shares of common stock for $25.37 per share, as part of a pre-arranged 10b5-1 trading plan.

Summary

• David Buonasera, Chief Technology Officer of Magnite, Inc., disposed of 2,950 shares of common stock.
• The transaction occurred on September 3, 2025, at a price of $25.37 per share.
• This sale was executed pursuant to a Rule 10b5-1 trading plan adopted by Mr. Buonasera on August 15, 2024.
• Following the reported transaction, Mr. Buonasera beneficially owns 238,629 shares of Magnite common stock.

Sentiment

Score: 5

Explanation: The sale by a key executive is a routine transaction under a pre-established 10b5-1 plan, which typically reduces the negative signal often associated with insider selling, resulting in a neutral sentiment.

Positives

• The transaction was conducted under a Rule 10b5-1 trading plan, indicating a pre-scheduled and non-discretionary sale, which can mitigate concerns about opportunistic insider trading.

Negatives

• An insider sale, even if pre-planned, reduces the direct equity stake of a key executive in the company.

Future Outlook

NA

Industry Context

NA

Stakeholder Impact

• Shareholders may view the insider sale as a slight reduction in management's direct equity alignment, though the pre-planned nature mitigates immediate concerns.

Key Dates

Keywords

Magnite, MGNI, insider trading, Form 4, stock sale, David Buonasera, CTO, 10b5-1 plan