Summary
Updated Aug 31, 2026
Michael G. Barrett is CEO, Director of MAGNITE, INC. (MGNI). 20 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $6.68M of MGNI on 7 August 2026. Lifetime open-market sales: $28.58M.
Recent Transactions
20Every recent SEC Form 4 transaction Michael G. Barrett has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Michael G. Barrett go back to 2024: 20 primary Form 4 filings, an average of 6.7 per year. 20 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 Michael G. Barrett 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.
- PEP VIII GP LLC - $151.70M of OUT 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
- Matthew Siegel - $1.29M of OUT open-market activity in the last 12 months
- Sarah Patricia Harden - $1.15M of MGNI open-market activity in the last 12 months
- Richard H. Sauer - $1.10M of OUT 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 Michael G. Barrett?
Michael G. Barrett is a corporate insider, tracked as CEO, Director of MAGNITE, INC. (MGNI). InsiderAlpha holds 20 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 Michael G. Barrett submitted recently?
6 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Michael G. Barrett been buying or selling stock?
Recorded transactions: 0 open-market purchases and 14 open-market sales ($28.58M) across all tracked filings.
Where can I see all of Michael G. Barrett'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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