Magnite (MGNI) Director Knopper Douglas S Sells $981K of Stock

By TradeTexts Research Desk Oct 16, 2026, 3:15 PM EDT

Key Points

Magnite, Inc. Director Knopper Douglas S sold 37,337 shares on September 17, 2026, in a planned transaction worth $981,216.
The stock recently traded around $23.28, down about 9.2% since the September transaction close price of $25.63.
Several Wall Street firms recently updated their targets for the advertising platform, with Needham maintaining a Buy rating and a $30 target.

Since the trade, $MGNI is down 6.1% after 1 week, down 8.1% after 1 month and down 8.1% to date (from the $25.63 close on Sep 17, 2026).

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Magnite, Inc. Director Knopper Douglas S sold 37,337 shares of the company on September 17, 2026. According to a Form 4 filing with the SEC, the shares were sold at a price of $26.28 each, for a total value of about $981,216. The transaction was carried out pursuant to a pre-arranged trading plan.

MGNI Magnite, Inc.

$23.55 +46.64% year to date

Daily close · Oct 19, 2026

Inside Knopper Douglas S's Magnite Trade

The planned sale involved 37,337 shares of common stock executed at $26.28 per share. Magnite shares closed at $25.63 on the day of the trade. This transaction adds to a series of insider moves tracked at the advertising technology firm over recent months.

Other Institutional Activity in Magnite

Boston Partners grew its holdings by 294,043 shares, ending with 5,013,835 shares worth about $118,075,810. American Century Companies Inc cut its stake by 4,164 shares, ending with 4,622,736 shares worth about $108,865,429. Nuveen, LLC lifted its holdings by 204,640 shares, ending with 3,794,811 shares worth about $89,367,796.

Magnite, Inc. Stock Down 4.9%

The stock recently traded around $23.28 as of October 16, 2026, down about 9.2% from its September 17 close of $25.63.

Recent Earnings

Magnite reported $742,044,032 in trailing-twelve-month revenue alongside an EPS of $1.04. The firm's next earnings report is scheduled for November 4, 2026.

Dividend

The company does not pay a regular dividend to shareholders.

Insider Buying and Selling at Magnite, Inc.

Director Knopper Douglas S's sale follows several other insider transactions. Earlier, CEO Michael Barrett bought 178,596 shares on June 15, 2026, at $5.80 per share for $1,035,856.80, and another 100,000 shares on June 16, 2026, at $5.80 per share for $580,000. Chief Technology Officer David Buonasera sold 11,233 shares on June 16, 2026, at $18.00 per share for $202,194 in a planned trade. President of Revenue and Market Strategy Buckley Sean Patrick sold 19,233 shares on June 17, 2026, at $19.00 per share for $365,427 in a planned trade. Later, on October 12, 2026, Paul Caine sold 12,500 shares for $316,125.

Analysts Set New Price Targets

RBC Capital maintains an Outperform rating with a $27 target raised from $20 on August 6, 2026. Evercore ISI Group maintains an Outperform rating with a $25 target raised from $21 on August 6, 2026. Wells Fargo maintains an Equal-Weight rating with a $22 target raised from $21 on August 7, 2026. Needham maintains a Buy rating with a $30 target raised from $25 on September 3, 2026. BTIG reiterates a Buy rating with a $27 target on September 9, 2026.

About Magnite

Magnite operates an independent digital advertising platform that helps publishers monetize video, display, and audio content across screens. The firm connects sellers of ad space with buyers, facilitating automated ad auctions. Insider transactions like this one offer a window into how key leadership members manage their personal equity holdings as the company navigates the digital ad market.

Bottom Line

Investors will look toward Magnite's upcoming earnings report on November 4, 2026, for further updates on platform revenue growth and profitability. Continued monitoring of Form 4 filings will show whether other directors adjust their positions.