Knopper Douglas S 4

What Happened
Douglas S. Knopper, a director of Magnite, Inc. (MGNI), disposed of 37,337 shares in an open-market sale on June 16, 2026. The weighted-average price was $18.10 per share, yielding approximately $675,800 in proceeds. The sale was executed pursuant to a pre-established Rule 10b5-1 trading plan.

Key Details

• Transaction date: June 16, 2026; Form 4 filed June 17, 2026 (timely filing).
• Shares sold: 37,337; weighted-average price: $18.10; total proceeds: ~$675,800.
• Price range: individual sale prices ranged from $18.00 to $18.25 (weighted avg reported). The filer offers to provide the exact breakdown by price on request.
• Method: Open-market sale executed under a Rule 10b5-1 plan adopted December 12, 2025 (Footnote F1).
• Shares owned after the transaction: not disclosed in the provided filing excerpt.
• No indication in the filing that the report was late.

Context
Sales made under a 10b5-1 trading plan are pre-scheduled and typically viewed as routine liquidity transactions rather than immediate signals about the director’s view of the company. This filing documents a sale (S) rather than a purchase; retail investors should note it for ownership and insider activity tracking but avoid inferring motive from the sale alone.