Form 4: Magnite Director Douglas Knopper Sells 37,337 Shares

Magnite, Inc. Director Douglas S. Knopper sold 37,337 shares of common stock via a pre-arranged Rule 10b5-1 trading plan.

Summary

• Director Douglas S. Knopper sold 37,337 shares of Magnite, Inc. (MGNI) common stock.
• The shares were sold at a weighted average price of $18.10 per share.
• The transaction was executed on June 16, 2026.
• Following the sale, the director retains beneficial ownership of 125,810 shares.
• The sale was conducted under a Rule 10b5-1 trading plan adopted on December 12, 2025.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was conducted through a pre-arranged 10b5-1 plan, which is a routine administrative action for corporate insiders.

Positives

• The transaction was executed under a pre-established Rule 10b5-1 plan, indicating the sale was planned in advance rather than a reactive move to current market conditions.

Negatives

• The sale represents a reduction in the director's equity stake in the company.

Risks

• Insider selling can sometimes be perceived by the market as a lack of confidence in the short-term growth prospects of the company.

Future Outlook

No forward-looking guidance or operational outlook was provided in this filing.

Industry Context

StockSavvy.ai notes that insider selling via 10b5-1 plans is a standard corporate governance practice for liquidity and diversification, and is generally viewed as neutral by institutional investors when pre-planned.

Comparison to Industry Standards

• The use of Rule 10b5-1 plans is the industry standard for directors to sell shares while avoiding potential accusations of insider trading based on non-public information.

Stakeholder Impact

• Minimal impact expected as the sale was pre-planned and represents a small portion of the director's total holdings.

Key Dates

Keywords

Magnite, MGNI, Insider Trading, Form 4, Stock Sale, Douglas Knopper