Buonasera David 4

What Happened
David Buonasera, Chief Technology Officer at MAGNITE, sold a total of 13,699 shares in three open-market transactions between June 15–17, 2026. The breakdown: 1,057 shares at $17.00 on 2026-06-15 ($17,969); 11,233 shares at $18.00 on 2026-06-16 ($202,194); and 1,409 shares at $19.00 on 2026-06-17 ($26,771). Total proceeds were about $246,934. These were sales (not purchases).

Key Details

• Transaction type: Open-market sales (code S).
• Dates & prices: 2026-06-15 — 1,057 @ $17.00; 2026-06-16 — 11,233 @ $18.00; 2026-06-17 — 1,409 @ $19.00.
• Total shares sold: 13,699; approximate total value: $246,934.
• Shares owned after transaction: Not specified in the provided excerpt — see the Form 4 for post-transaction holdings.
• Footnote: Trades were executed under a Rule 10b5-1 trading plan adopted by Mr. Buonasera on Sept 11, 2025.
• Filing: Form 4 filed 2026-06-17 (appears to be timely relative to the reported trade dates).

Context
A 10b5-1 plan is a pre-established trading plan that allows insiders to sell shares on a schedule and is commonly used to avoid filing-window issues; it typically indicates these were pre-planned, routine sales rather than ad hoc insider-driven trades. As this is a sale (not a purchase), it does not by itself signal positive insider conviction. For full details on holdings and any additional disclosures, consult the Form 4 filing (Accession No. 0001193125-26-274503).