Skip to navigationSkip to main contentSkip to right columnADVERTISEMENTJonathan Ponciano, The Motley FoolSun, August 9, 2026 at 6:52 PM GMT+2 4 min readDouglas S. Knopper, a director at Magnite, Inc. (NASDAQ:MGNI), sold 37,337 shares of common stock on August 6 at $22.72 per share, according to an SEC Form 4 filing.Transaction summaryMetricValueTransaction value$848,000Shares sold37,337Post-transaction shares (directly held)88,473Post-transaction value$2.15 millionTransaction value based on SEC Form 4 weighted average sale price ($22.72); post-transaction value based on the August 6 market close ($24.32).Key questionsWhat was the catalyst for this transaction?The sale was pre-arranged under a Rule 10b5-1 trading plan established in December 2025, a mechanism frequently used by corporate insiders to execute trades according to predetermined parameters to avoid potential conflicts.What is the extent of the insider's remaining exposure?Following this transaction, Knopper retains direct ownership of 88,473 shares, representing a 0.06% insider interest in the company.What financial context surrounds the company?Magnite operates in the communication services sector as an advertising agency platform provider, with a market capitalization of $3.5 billion and trailing-twelve-month revenue of $742.0 million as of the August 6 market close.How has the stock performed leading up to this filing?As of the transaction date, the company has delivered an 8% one-year total return, while reporting trailing-12-month net income of $166.9 million.Company OverviewMetricValueShare Price (as of market close 2026-08-06)$24.32Market Capitalization$3.5 billionRevenue (TTM)$742.0 millionNet Income (TTM)$166.9 millionCompany SnapshotMagnite operates a global digital advertising marketplace platform that provides publishers—including connected TV channels, mobile applications, and websites—with comprehensive tools and applications to manage and monetize their advertising inventory.The company generates revenue through a two-sided marketplace model, offering services and technology solutions to both supply-side participants (publishers) and demand-side participants (advertisers, agencies, agency trading desks, and demand-side platforms), facilitating programmatic advertising transactions.Magnite's primary customers include digital publishers seeking to optimize ad revenue, advertising agencies and brands requiring efficient media buying solutions, and demand-side platforms that leverage the company's infrastructure to execute targeted advertising campaigns at scale.Magnite is a leading independent platform in the digital advertising technology sector, with a market capitalization of $3.5 billion and TTM revenues of $742.0 million. The company maintains a competitive advantage through its sophisticated, independent marketplace infrastructure that connects a diverse ecosystem of publishers and advertisers globally. With a demonstrated ability to generate substantial net income of $166.9 million TTM, Magnite is positioned as a critical infrastructure provider in the programmatic advertising landscape.Terms and Privacy PolicyEU DSA contactPrivacy & Cookie SettingsMore Info