Summary
Updated Aug 31, 2026
Sean Patrick Buckley is President, Revenue & Market Strategy of MAGNITE, INC. (MGNI). 13 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $69K of MGNI on 18 August 2026. Lifetime open-market sales: $4.49M.
Recent Transactions
20Every recent SEC Form 4 transaction Sean Patrick Buckley has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Sean Patrick Buckley go back to 2024: 13 primary Form 4 filings, an average of 4.3 per year. 16 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Sean Patrick Buckley files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Michael G. Barrett - $13.64M of MGNI open-market activity in the last 12 months
- Douglas S. Knopper - $1.69M of MGNI open-market activity in the last 12 months
- Sarah Patricia Harden - $1.15M of MGNI open-market activity in the last 12 months
- Adam Lee Soroca - $1.02M of MGNI open-market activity in the last 12 months
- Brian Gephart - $992K of MGNI open-market activity in the last 12 months
- Paul Caine - $818K of MGNI open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Sean Patrick Buckley?
Sean Patrick Buckley is a corporate insider, tracked as President, Revenue & Market Strategy of MAGNITE, INC. (MGNI). InsiderAlpha holds 13 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Sean Patrick Buckley submitted recently?
4 primary Form 4 filings in the last 90 days, covering 1 company.
Has Sean Patrick Buckley been buying or selling stock?
Recorded transactions: 0 open-market purchases and 15 open-market sales ($4.49M) across all tracked filings.
Where can I see all of Sean Patrick Buckley's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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