A Form 4 filed on September 11, 2026 discloses that Paul Caine, a director of Magnite, Inc. (NASDAQ:MGNI), sold 5,000 shares of common stock on September 10, 2026 under a pre-established Rule 10b5-1 trading plan.

Key Highlights

  • Shares sold: Paul Caine disposed of 5,000 shares of Magnite common stock on September 10, 2026.
  • Weighted average price: The reported sale price was $23.53 per share, a weighted average across multiple transactions.
  • Price range: Individual transactions occurred at prices ranging from $23.22 to $23.63, inclusive.
  • Remaining ownership: Following the sale, Caine directly beneficially owned 144,901 shares of common stock.
  • 10b5-1 plan: The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by Caine on August 20, 2025.
  • Filer role: Paul Caine is identified in the filing as a director of Magnite, Inc.

Director Paul Caine's Share Sale Under Pre-Planned Trading Program

According to the Form 4 filed with the SEC on September 11, 2026, Paul Caine, a director at Magnite, Inc., sold 5,000 shares of common stock on September 10, 2026. The filing reports that the transaction was marked with code "S" (a sale) and that the shares were disposed of directly by the reporting person.

The filing discloses that the price of $23.53 listed in the transaction table is a weighted average, as the shares were sold across multiple transactions at prices ranging from $23.22 to $23.63, inclusive. According to the filing, Caine "undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."

The filing further indicates that the transaction was effected pursuant to a Rule 10b5-1 trading plan that Caine adopted on August 20, 2025. Following the reported sale, the filing states that Caine directly beneficially owned 144,901 shares of Magnite common stock. No derivative securities transactions were reported. The Form 4 was signed by Aaron Saltz as attorney-in-fact on September 11, 2026.

What Was Disclosed

Magnite, Inc. director Paul Caine reported the sale of 5,000 shares of common stock on September 10, 2026 at a weighted average price of $23.53, executed under a Rule 10b5-1 plan adopted August 20, 2025, leaving him with 144,901 shares directly held.