Summary
Updated Aug 31, 2026
David Buonasera is CHIEF TECHNOLOGY OFFICER of MAGNITE, INC. (MGNI). 18 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $22K of MGNI on 7 August 2026. Lifetime open-market sales: $1.53M.
Recent Transactions
20Every recent SEC Form 4 transaction David Buonasera has reported, most recent first.
Trading Pattern
InsiderAlpha's records for David Buonasera go back to 2024: 18 primary Form 4 filings, an average of 6.0 per year. 15 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 David Buonasera 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
- Sean Patrick Buckley - $3.78M 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
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is David Buonasera?
David Buonasera is a corporate insider, tracked as CHIEF TECHNOLOGY OFFICER of MAGNITE, INC. (MGNI). InsiderAlpha holds 18 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 David Buonasera submitted recently?
6 primary Form 4 filings in the last 90 days, covering 1 company.
Has David Buonasera been buying or selling stock?
Recorded transactions: 0 open-market purchases and 17 open-market sales ($1.53M) across all tracked filings.
Where can I see all of David Buonasera'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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