Buckley Sean Patrick 4

What Happened Sean Patrick Buckley, President, Revenue & Market Strategy at Magnite (MGNI), sold 19,233 shares at $19.00 per share on June 17, 2026, generating proceeds of $365,427. The filing lists this as an open-market/private sale (code S). Sales are often routine liquidity events rather than a direct negative signal about the company.

Key Details

• Transaction date and price: 2026-06-17 at $19.00 per share; total proceeds $365,427.
• Transaction type: Sale (open market or private sale), reported on Form 4 filed 2026-06-18.
• Shares owned after transaction: Not specified in the information provided in this summary.
• Footnote: Transaction was effected under a Rule 10b5-1 trading plan adopted by the reporting person on September 10, 2025 (per footnote F1).
• Timeliness: Filing date (2026-06-18) follows the transaction date (2026-06-17); no late filing flag noted.

Context A 10b5-1 plan is a pre-established trading arrangement that allows insiders to sell shares on a predetermined schedule, which can reduce the informational impact of the sale. This report records a routine insider sale; it does not by itself indicate the insider’s current view of Magnite’s prospects.