Buonasera David 4

What Happened David Buonasera, Chief Technology Officer of Magnite, Inc. (MGNI), reported a sale of 1,224 shares on July 7, 2026. The shares were disposed at $21.00 each, totaling $25,704. The transaction is coded "S" (sale) and was reported as an open-market or private sale; sales are often routine and do not necessarily signal a change in insider confidence.

Key Details

• Transaction date and price: July 7, 2026 — 1,224 shares sold at $21.00 per share.
• Total proceeds: $25,704.
• Post-transaction holdings: Not specified in the provided filing.
• Footnote: The sale was made pursuant to a Rule 10b5-1 trading plan adopted by Mr. Buonasera on September 11, 2025 (per footnote F1).
• Filing timeliness: Form 4 was filed July 9, 2026 (within the typical 2-business-day window), so the filing appears timely.

Context A 10b5-1 trading plan allows insiders to execute pre-scheduled trades and is intended to insulate those trades from accusations of trading on material nonpublic information. Sales under such plans are commonly routine portfolio-management transactions and should not be interpreted as definitive indicators of the insider’s view of the company’s prospects.