Douglas S. Knopper
Director · MAGNITE, INC.
IndividualSelling only5 10b5-1 trades
- 2026
- Sep 18, 2026
- 4
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Douglas S. Knopper 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 in MGNI purchases and sales in the last 12 months
- Sean Patrick Buckley - $2.78M in MGNI purchases and sales in the last 12 months
- Katie Seitz Evans - $1.84M in MGNI purchases and sales in the last 12 months
- Sarah Patricia Harden - $1.15M in MGNI purchases and sales in the last 12 months
- Aaron Saltz - $936K in MGNI purchases and sales in the last 12 months
- David Buonasera - $841K in MGNI purchases and sales in the last 12 months
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Frequently asked questions
Who is Douglas S. Knopper?
Douglas S. Knopper is a corporate insider, tracked as Director of MAGNITE, INC. (MGNI). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Douglas S. Knopper submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Douglas S. Knopper been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($2.67M) across all tracked filings.
