Magnite director sells shares under pre-arranged plan

Douglas S. Knopper, a director at Magnite Inc, sold 37,337 shares of common stock on 6 August 2026 at a weighted average price of $22.72 per share. The transaction was executed under a Rule 10b5-1 trading plan established in December 2025, a pre-arranged mechanism used by corporate insiders to execute trades according to predetermined parameters to avoid conflicts of interest.

Following the sale, Knopper retains direct ownership of 88,473 shares, representing approximately 0.06% insider interest in the company. The sale occurred on the same day that other Magnite insiders executed share sales, with all transactions confirmed to be under pre-arranged plans set months earlier.

The insider trading activity comes as Magnite reports strong financial momentum. The company reported 36% growth in Connected TV contribution, excluding traffic acquisition costs, which now constitutes more than half of the company's total contribution. Adjusted EBITDA rose by 30% in the same period, prompting management to raise full-year guidance for adjusted EBITDA, margins, and free cash flow.

Magnite operates a global digital advertising marketplace platform, connecting publishers such as connected TV channels, mobile apps, and websites with advertisers and agencies. As of 6 August 2026, the company has a market capitalisation of $3.5 billion and trailing-twelve-month revenue of $742.0 million. The company also reported trailing-twelve-month net income of $166.9 million.

The stock delivered an 8% one-year total return as of the transaction date. While the Motley Fool’s Stock Advisor analyst team recommended the stock generally, they did not include Magnite in their current list of 10 best stocks to buy. The company is positioning new agentic products as a future growth driver as it seeks to maintain its competitive advantage in the programmatic advertising landscape.